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Sample records for nasal tomografia computadorizada

  1. Tumores malignos da cavidade nasal: tomografia computadorizada e ressonância magnética

    OpenAIRE

    Souza,Ricardo Pires de; Paes Junior,Ademar José de Oliveira; Lenh,Carlos Neutzling; Gonzalez, Fábio Mota; Cordeiro,Flamarion de Barros; Yamashiro,Ilka; Rapoport, Abrão

    2004-01-01

    OBJETIVO: Este estudo propõe-se a avaliar o papel da tomografia computadorizada e da ressonância magnética na caracterização da extensão profunda dos tumores malignos da cavidade nasal. MATERIAIS E MÉTODOS: Entre 1990 e 2000 foram avaliados, retrospectivamente, 12 pacientes com diagnóstico de tumores malignos da cavidade nasal atendidos nos Departamentos de Diagnóstico por Imagem e Cirurgia de Cabeça e Pescoço do Complexo Hospitalar Heliópolis, São Paulo, SP. Todos os casos foram confirmados ...

  2. Tumores malignos da cavidade nasal: tomografia computadorizada e ressonância magnética Malignant tumors of the nasal cavity: computed tomography and magnetic resonance imaging

    OpenAIRE

    Ricardo Pires de Souza; Ademar José de Oliveira Paes Junior; Carlos Neutzling Lenh; Fábio Mota Gonzalez; Flamarion de Barros Cordeiro; Ilka Yamashiro; Abrão Rapoport

    2004-01-01

    OBJETIVO: Este estudo propõe-se a avaliar o papel da tomografia computadorizada e da ressonância magnética na caracterização da extensão profunda dos tumores malignos da cavidade nasal. MATERIAIS E MÉTODOS: Entre 1990 e 2000 foram avaliados, retrospectivamente, 12 pacientes com diagnóstico de tumores malignos da cavidade nasal atendidos nos Departamentos de Diagnóstico por Imagem e Cirurgia de Cabeça e Pescoço do Complexo Hospitalar Heliópolis, São Paulo, SP. Todos os casos foram confirmados ...

  3. Tumores malignos da cavidade nasal: tomografia computadorizada e ressonância magnética Malignant tumors of the nasal cavity: computed tomography and magnetic resonance imaging

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    Ricardo Pires de Souza

    2004-10-01

    Full Text Available OBJETIVO: Este estudo propõe-se a avaliar o papel da tomografia computadorizada e da ressonância magnética na caracterização da extensão profunda dos tumores malignos da cavidade nasal. MATERIAIS E MÉTODOS: Entre 1990 e 2000 foram avaliados, retrospectivamente, 12 pacientes com diagnóstico de tumores malignos da cavidade nasal atendidos nos Departamentos de Diagnóstico por Imagem e Cirurgia de Cabeça e Pescoço do Complexo Hospitalar Heliópolis, São Paulo, SP. Todos os casos foram confirmados com exame anatomopatológico. RESULTADOS: Foi identificada extensão para os seios maxilares e etmoidal em seis pacientes, para a cavidade nasal contralateral, órbita e lâmina crivosa em cinco pacientes, para a nasofaringe e espaço mastigatório em dois pacientes, e para o seio cavernoso, fossas cranianas anterior e média, fossa pterigomaxilar, fissuras orbitárias superior e inferior, seio frontal, seio etmoidal contralateral, lâmina crivosa contralateral, palato duro e fossa pterigopalatina em um paciente. CONCLUSÃO: A análise precisa da extensão local e disseminação tumoral dada pela tomografia computadorizada e ressonância magnética desempenha papel importante no planejamento terapêutico, influenciando também o prognóstico.OBJECTIVE: The aim of this study is to evaluate the role of computed tomography and magnetic resonance imaging in the characterization of deep tissue extension of malignant tumors of the nasal cavity. MATERIALS AND METHODS: Twelve patients diagnosed with malignant tumors of the nasal cavity were retrospectively evaluated at the Departments of Diagnostic Imaging and Head and Neck Surgery of the "Complexo Hospitalar Heliópolis", São Paulo, Brazil, between 1990 and 2000. All cases were confirmed by histopathologic examination. RESULTS: Extension to the maxillary and ethmoid sinuses was identified in six patients, extension to contralateral nasal cavity, orbit and lamina cribosa in five patients, extension to

  4. Angiografia por tomografia computadorizada dos aneurismas intracranianos

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    Laureano Vinícius Santos

    2002-01-01

    Full Text Available Este trabalho foi realizado para avaliar os achados da angiografia por tomografia computadorizada, comparativamente à angiografia por subtração digital, em relação aos aneurismas intracranianos, e a possibilidade da maior utilização da angiografia por tomografia computadorizada no Brasil. Foram analisados oito pacientes que apresentavam um total de sete aneurismas não tratados e um aneurisma tratado. Houve subseqüente correlação com outros trabalhos publicados na literatura médica. Os exames foram realizados em uma clínica e em dois hospitais privados, na cidade do Rio de Janeiro, RJ. Foi demonstrada boa correlação entre os métodos estudados, em relação ao diagnóstico dos aneurismas, no acompanhamento e avaliação pré-terapêutica dessas lesões. A angiografia por tomografia computadorizada foi um exame menos invasivo, de menor custo e maior acessibilidade. Concluiu-se que a angiografia por tomografia computadorizada é um exame que deve ser utilizado com maior freqüência para avaliação nesta enfermidade.

  5. Malignant tumors of the nasal cavity: computed tomography and magnetic resonance imaging; Tumores malignos da cavidade nasal: tomografia computadorizada e ressonancia magnetica

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    Souza, Ricardo Pires de; Paes Junior, Ademar Jose de Oliveira; Gonzalez, Fabio Mota; Cordeiro, Flamarion de Barros; Yamashiro, Ilka [Complexo Hospitalar Heliopolis, Sao Paulo, SP (Brazil). Programa de Residencia Medica em Radiologia e Diagnostico por Imagem]. E-mail: ricapires@ig.com.br; Lenh, Carlos Neutzling [Complexo Hospitalar Heliopolis, Sao Paulo, SP (Brazil). Servico de Cirurgia de Cabeca e Pescoco; Rapoport, Abrao [Complexo Hospitalar Heliopolis, Sao Paulo, SP (Brazil). Curso de Pos-graduacao em Ciencias da Saude

    2004-10-01

    The aim of this study is to evaluate the role of computed tomography and magnetic resonance imaging in the characterization of deep tissue extension of malignant tumors of the nasal cavity. Twelve patients diagnosed with malignant tumors of the nasal cavity were retrospectively evaluated at the Departments of Diagnostic Imaging and Head and Neck Surgery of the 'Complexo Hospitalar Heliopolis', Sao Paulo, Brazil, between 1990 and 2000. All cases were confirmed by histopathologic examination. The results were: extension to the maxillary and ethmoid sinuses was identified in six patients, extension to contralateral nasal cavity, orbit and lamina cribosa in five patients, extension to nasal pharynx and masticator space in two patients, extension to cavernous sinus, anterior/middle cranial fossa, pterygomaxillary fossa, inferior/superior orbital fissure, frontal sinus, contralateral ethmoid sinus, contralateral lamina cribosa, hard palate and pterygopalatine fossa in one patient. Conclusion: It is important to precisely assess the local extension and spread of tumor by computed tomography and magnetic resonance imaging in order to plan the approach to treatment, which will influence the prognosis. (author)

  6. Tomografia computadorizada no diagnóstico da otosclerose fenestral

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    Vicente Andy de Oliveira

    2004-01-01

    Full Text Available OBJETIVO: Identificar os principais achados tomográficos da otosclerose fenestral e avaliar a utilidade da tomografia computadorizada de alta resolução (TCAR, como método diagnóstico dessa osteodistrofia. FORMA DE ESTUDO: Estudo prospectivo multicêntrico com tomografia computadorizada (TC de ossos temporais. MATERIAL E MÉTODO: 54 pacientes com diagnóstico clínico e cirúrgico de otosclerose. Foi realizada uma análise tomográfica, em que foi avaliada a sensibilidade da TC no diagnóstico radiológico da otosclerose fenestral, sendo verificados os principais sítios de lesões dessa doença, como também a sua bilateralidade e simetria. Foram incluídos neste estudo 22 pacientes submetidos à TC de ossos temporais para investigação de outras afecções otológicas, que constituíram o grupo controle. RESULTADOS: A TC foi positiva em 87% dos pacientes (77% das orelhas. Os achados tomográficos foram bilaterais na maioria dos casos (78,7%, e o foco fenestral mais prevalente foi o foco anterior à janela oval (FAJO. CONCLUSÕES: A TC apresentou um alto índice de positividade e o FAJO foi o foco mais prevalente nessa população, podendo ser considerado um achado tomográfico altamente sugestivo de otosclerose.

  7. Acurácia da mensuração do enfisema pulmonar na tomografia computadorizada: pontos importantes

    OpenAIRE

    Hochhegger, Bruno; Marchiori, Edson; Klaus L. Irion; Oliveira, Hugo

    2010-01-01

    Para garantir a confiabilidade dos dados de quantificação computadorizada do enfisema pulmonar (densitovolumetria pulmonar) na tomografia computadorizada, alguns aspectos técnicos devem ser considerados. A alteração das densidades na tomografia computadorizada com as mudanças no nível de inspiração e expiração do pulmão, com a espessura de corte da tomografia computadorizada, com o algoritmo de reconstrução e com o tipo de tomógrafo dificulta as comparações tomográficas nos estudos de acompan...

  8. Tomografia computadorizada das patologias acometendo o compartimento iliopsoas

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    Montandon Cristiano

    2001-01-01

    Full Text Available Este trabalho tem como objetivo revisar as patologias que acometem o compartimento iliopsoas. Foi realizada análise retrospectiva de casos com acometimento do compartimento iliopsoas avaliados por tomografia computadorizada (TC, no Departamento de Radiologia da Faculdade de Ciências Médicas da Universidade Estadual de Campinas, nos últimos dez anos, confirmados por biópsia cirúrgica ou percutânea. Os principais diagnósticos encontrados foram neoplasias, abscessos e hematomas. Os achados tomográficos baseiam-se na extensão do acometimento iliopsoas, no grau de atenuação, margens da lesão, presença de gás e/ou calcificações, destruição óssea, infiltração da gordura e acometimento de estruturas abdominais adjacentes. A TC é o método de escolha na avaliação do compartimento iliopsoas, podendo ser utilizada para orientar biópsias percutâneas, cirúrgicas ou drenagem. Porém, os achados isolados do estudo por TC, sem o conhecimento da história clínica, não são específicos para permitir a diferenciação das diversas patologias que acometem o compartimento iliopsoas.

  9. Contraste iodado em tomografia computadorizada : reações adversas imediatas em pacientes hospitalizados

    OpenAIRE

    Beatriz Cavalcanti Juchem

    2005-01-01

    Pesquisa quantitativa do tipo exploratório-descritivo, prospectivo, de caráter não experimental. O objetivo consistiu em conhecer as reações adversas imediatas ao contraste iodado intravenoso em pacientes internados, submetidos a tomografia computadorizada num hospital escola, sendo campo do estudo a Unidade de Tomografia do Hospital de Clínicas de Porto Alegre. A coleta de dados ocorreu através de planilha de registros preenchida pela equipe de enfermagem atuante na Unidade, durante as 24 ho...

  10. Mediadores inflamatórios, citograma em lavado nasal e tomografia computadorizada de seios paranasais em crianças atópicas Inflammatory mediators, cell counts in nasal lavage and computed tomography of the paranasal sinuses in atopic children

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    Loreni C.S. Kovalhuk

    2001-08-01

    Full Text Available OBJETIVOS: os objetivos deste estudo foram avaliar a celularidade e os mediadores inflamatórios no lavado nasal (LN e a extensão de comprometimento da mucosa dos seios paranasais, em atópicos assintomáticos para sinusite. MÉTODOS: foram estudados 48 atópicos com rinite alérgica (RA, 33/48 com asma; 13 crianças não atópicas constituíram o grupo controle. Foram excluídos os casos com sinusite aguda, crônica ou recorrente. A extensão de lesão da mucosa paranasal, avaliada por tomografia computadorizada (TC coronal dos seios da face (SF, foi graduada por escore padronizado (0-30. Escore maior ou igual a 12 indicava comprometimento extenso da mucosa dos SF. O LN foi obtido para quantificar a celularidade total e diferencial. Uma alíquota do sobrenadante foi usada para dosagem de mediadores inflamatórios: Interleucina-8 (IL-8, Mieloperoxidase (MPO, Proteína catiônica eosinofílica (ECP. A albumina foi usada como marcador de permeabilidade vascular. Estas determinações foram realizadas em amostras do fluido nasal (FN de todos os atópicos e em 6/13 dos casos-controle. Foram realizados nos 3 grupos hemograma e espirometria. RESULTADOS: o comprometimento da mucosa paranasal foi extenso em 7/33 (21% dos asmáticos (Grupo I, 2/15 (13% dos pacientes com RA (Grupo II. No grupo controle (Grupo III o maior escore de TC foi 7. A contagem total de células e de eosinófilos/ml e a concentração de albumina do FN foram maiores entre asmáticos com escore de TC acima de 12. O nível de IL-8, o número de neutrófilos e de células epiteliais/ml no FN foram semelhantes nos 3 grupos. Os atópicos (n=48 apresentaram uma correlação positiva entre escore de TC, eosinofilia periférica, número de eosinófilos/ml e concentração de ECP no FN. Houve uma associação entre o número de neutrófilos e concentrações de IL-8 e MPO e entre IL-8 e eosinófilos. CONCLUSÕES: em asmáticos assintomáticos para sinusite, o comprometimento extenso da

  11. Análise do diâmetro transverso do processo odontoide com uso da tomografia computadorizada

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    Fábio Kazuo Soejima; Carlos Henrique Maçaneiro; Rodrigo Fetter Lauffer; Marco Antônio Rodacki

    2010-01-01

    INTRODUÇÃO: o diâmetro reduzido do odontoide é um desafio para o cirurgião no planejamento pré-operatório e escolha na fixação da fratura com um ou dois parafusos. OBJETIVO: analisar a medida do diâmetro transverso (DT) do processo odontoide por meio da tomografia computadorizada para o planejamento pré-operatório da osteossíntese com um ou dois parafusos. MÉTODOS: foram analisadas 79 tomografias computadorizadas cervicais de pacientes adultos, sem deformidades congênitas ou queixas de dor em...

  12. Linfangiectasia renal: achado incidental em tomografia computadorizada multicorte e revisão da literatura

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    Rodrigo Abdalla de Vasconcelos

    2012-06-01

    Full Text Available Linfangiectasia renal é uma condição rara, caracterizada por coleções parapiélicas e perirrenais, que pode progredir de assintomática para insuficiência renal crônica. É apresentado um caso de achado incidental em tomografia computadorizada de linfangiectasia renal bilateral em paciente assintomático, com descrição dos principais achados à luz dos métodos de imagem e ampla revisão da literatura.

  13. Lesões traumáticas do mediastino: aspectos na tomografia computadorizada

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    Melo Alessandro Severo Alves de; Moreira Luiza Beatriz Melo; Marchiori Edson

    2003-01-01

    As lesões traumáticas mediastinais constituem achados pouco freqüentes no trauma torácico, mas são de extrema importância, por representarem mau prognóstico, dada a sua gravidade e lesões associadas. O trauma mediastinal é cada vez mais diagnosticado pela tomografia computadorizada, em especial pelo rápido tempo de aquisição decorrente da técnica helicoidal, que permite a avaliação de pacientes em estado grave, possibilitando a adoção de conduta terapêutica eficiente. Os autores estudaram 11 ...

  14. A tomografia computadorizada na avaliação do comprometimento abdominal na paracoccidioidomicose

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    Roberto Martinez

    1988-06-01

    Full Text Available A tomografia computadorizada foi utilizada para avaliar o comprometimento abdominal em 25 doentes deparacoccidioidomicose. Existiam lesões intra-abdominais em, respectivamente, 75%e23% dos doentes com asformas aguda ("juvenil" e crônica ( do adulto '. A alteração mais freqüente foi o aumento dos gânglios linfáticos abdominais (12/25 casos; outras lesões foram: calcificação de gânglios linfáticos em 4 casos; obstrução das vias biliares em 5 doentes ictéricos; abscessos ou calcificação esplénica em 3 casos; 2 doentes mostraram lesões incomuns: aumento e irrgularidade do pâncreas em um e múltiplos abscessos nos músculos psoas em outro. Conclui-se que a tomografia computadorizada é procedimento útil na avaliação da disseminação da paracoccidioidomicose ao abdome e no diagnóstico de suas complicações abdominais.

  15. Diagnosis of chronic rhino sinusitis in patients with cystic fibrosis: correlation between anamnesis, nasal endoscopy and computed tomography; Diagnostico de rinossinusite cronica em pacientes com fibrose cistica: correlacao entre anamnese, nasofibroscopia e tomografia computadorizada

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    Boari, Leticia; Castro Junior, Ney Penteado de [Faculdade de Ciencias Medicas da Santa Casa de Sao Paulo, SP (Brazil)]. E-mail: curyboari@uol.com.br

    2005-11-15

    The sinonasal involvement is one of the most common manifestations in cystic fibrosis. Data show a high incidence of chronic rhino sinusitis in these patients. Although it has been found radiographic opacification of the sinus in more than 90% of cases, few are symptomatic. So that, it is difficult to recognize nasossinusal disease in patients with cystic fibrosis. Questionnaire, nasal endoscopy and CT-scan are very important methods in this approach. Aim: to evaluate the diagnosis of chronic rhino sinusitis in patients with cystic fibrosis by anamnesis, nasal endoscopy and CT-scan and compare those results.Study Design: Clinical prospective. Material and method: evaluation of 34 patients - older than 6 years and with a confirmed diagnoses of cystic fibrosis - by anamnesis (questionnaire), nasal endoscopy (score Lund-Kennedy) and CT-scan (score Lund-Mackay). Results: chronic rhino sinusitis was confirmed in: 20,58% of cases by the questionnaire, 73,52% of the cases by the nasal endoscopy and in 93,54% of the cases by the CT-scan. The results showed significant differences. The correlation between nasal endoscopy score (Lund-Kennedy score) and CT-scan score (Lund-Mackay score) was statistically significant. Conclusion: the diagnosis of chronic rhino sinusitis was statistically different between the three methods. It was higher in imaging analysis and lower in questionnaire. The nasal endoscopy is an excellent method to evaluate nasossinusal disease in cystic fibrosis. (author)

  16. Tomografia computadorizada do cranio no diagnostico dos meningiomas: registro de 16 casos

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    James Pitagoras de Mattos

    1983-03-01

    Full Text Available Os autores se referem à importância do emprego da tomografia computadorizada do crânio para o preciso diagnóstico dos meningiomas. Constam da experiência 16 casos, comprovados cirúrgica e histologicamente. A média de idade foi de 52,1 anos, sendo 10 pacientes do sexo feminino e 6 do masculino. Quanto à localização, 5 eram da cavidade orbitrária e/ou asa do esfenóide, 3 parasagitais, 3 da foice, 2 supra-selares, 2 de convexidade e 1 do tentório. Concluem tratar-se de exame de grande positividade (95-98%, praticamente inócuo e que permite, na atualidade, o diagnóstico precoce conduzindo, consequentemente, a melhores resultados terapêuticos.

  17. A tomografia computadorizada na avaliação do comprometimento abdominal na paracoccidioidomicose

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    Roberto Martinez

    1988-06-01

    Full Text Available A tomografia computadorizada foi utilizada para avaliar o comprometimento abdominal em 25 doentes deparacoccidioidomicose. Existiam lesões intra-abdominais em, respectivamente, 75%e23% dos doentes com asformas aguda ("juvenil" e crônica ( do adulto '. A alteração mais freqüente foi o aumento dos gânglios linfáticos abdominais (12/25 casos; outras lesões foram: calcificação de gânglios linfáticos em 4 casos; obstrução das vias biliares em 5 doentes ictéricos; abscessos ou calcificação esplénica em 3 casos; 2 doentes mostraram lesões incomuns: aumento e irrgularidade do pâncreas em um e múltiplos abscessos nos músculos psoas em outro. Conclui-se que a tomografia computadorizada é procedimento útil na avaliação da disseminação da paracoccidioidomicose ao abdome e no diagnóstico de suas complicações abdominais.Computerised tomography was utilized in 25 paracoccidioidomycosis patients to evaluate abdominal involvement. This was observed in patients, 75% of acute (juvenile type and 23% of chronic (adult type patients. The most frequent alteration was abdominal lymphnode enlargement (12/25 cases. Other lesions consisted of lymphnode calcification in 4 cases, biliary tract obstruction in 5 icteric patients, splenic abscess or calcification in 3 cases. Two patients had unusual lesions: one with pancreatic enlargement and irregularity and other with multiple abscesses in both psoas muscles. It was concluded that computerised tomography is a useful procedure for evaluating paracoccidioidomycosis dissemination to the abdomen and for the diagnosis of its abdominal complications.

  18. Histiocitoma fibroso benigno profundo: achados na tomografia computadorizada e histologia Deep benign fibrous histiocytoma: computed tomography and histology findings

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    Luciano Farage

    2005-04-01

    Full Text Available Apresentamos imagens de tomografia computadorizada de um paciente de 83 anos de idade com histiocitoma fibroso benigno profundo, na face lateral da perna esquerda, com evolução de longa data. À tomografia computadorizada observamos massa bem delimitada, ovalada, e que apresentava intenso realce periférico com uso do meio de contraste iodado. Este é um tumor de partes moles pouco freqüente e com raros relatos dos seus aspectos de imagem.We present the computed tomography images of an 83-year-old male patient with a deep benign fibrous histiocytoma at the lateral aspect of the left leg. Computed tomography images showed a well-defined mass with marked peripheral enhancement by iodinated contrast medium. Only few reports of this rare soft tissue tumor can be found in the literature.

  19. Carcinoma de células transicionais do trato urinário: aspectos da tomografia computadorizada

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    Almeida Junior José Guiomar de

    2003-01-01

    Full Text Available Embora relativamente incomum, o carcinoma de células transicionais do trato urinário é o segundo tumor mais freqüente do rim. Neste trabalho foram analisadas, de forma retrospectiva, as tomografias computadorizadas de dez pacientes com carcinoma de células transicionais confirmado por exame histopatológico. A bexiga foi acometida em 60% dos casos, o sistema pielocalicinal em 60% e o ureter em 10% deles. Lesões sincrônicas estiveram presentes em 40% das vezes. Os aspectos encontrados foram lesões vegetantes, espessamento da parede do ureter e lesões infiltrativas do rim. Foram descritos dois casos de tumores calcificados e um carcinoma de células transicionais surgindo no interior de um divertículo de bexiga. A tomografia computadorizada detectou extensão local do tumor em 80% dos pacientes e lesão a distância em 20%. A tomografia computadorizada permitiu caracterizar a extensão da doença, localmente e a distância, possibilitando que um grupo selecionado de pacientes pudesse ser tratado de forma conservadora.

  20. Variações anatômicas e sinusopatias: estudo por tomografia computadorizada Anatomical variations and sinusitis: a computed tomographic study

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    Marcio M. Kinsui

    2002-10-01

    Full Text Available Introdução: A tomografia computadorizada tem sido cada vez mais utilizada para a identificação e avaliação das variações anatômicas das cavidades nasais que podem levar às sinusites. Objetivo: Avaliar, por meio da tomografia computadorizada, a incidência de espessamento mucoso nos seios paranasais de pacientes com sintomas de sinusite e a correlação entre sinusopatias e presença de célula de Haller, concha média bolhosa e desvio de septo nasal localizado no meato médio. Forma de Estudo: Clínico retrospectivo. Material e Método: Foram avaliadas retrospectivamente 150 tomografias computadorizadas de seios paranasais de pacientes com idade igual ou superior a 13 anos, realizadas no Departamento de Diagnóstico por Imagem da Universidade Federal de São Paulo - Escola Paulista de Medicina, no período de julho de 1999 a outubro de 2001. Foram excluídos os exames de pacientes com pós-operatório de cirurgias de seios paranasais e de base de crânio, além dos portadores de lesões tumorais envolvendo estas regiões. Resultados: 70% dos pacientes apresentavam espessamento mucoso em pelo menos um dos seios paranasais. Observou-se a freqüência de 52,7% de sinusopatia maxilar, 28,0% de etmoidal, 13,0% de esfenoidal e 8,3% de frontal. Concha média bolhosa foi encontrada em 33,3% das cavidades nasais, desvio de septo nasal localizado no meato médio em 23,3% e célula de Haller em 9,3%. Conclusões: Os seios paranasais mais freqüentemente acometidos foram, em ordem decrescente: maxilar, etmoidal, esfenoidal e frontal. Não foi observado correlação entre sinusopatias e presença de célula de Haller, concha média bolhosa e desvio de septo nasal localizado no meato médio.Introduction: Computed tomography has been increasingly used both to identify and to evaluate anatomy variations of nasal cavities that can lead to the development of sinusitis. Purpose: The purpose of the present study is to determine the incidence of mucosal

  1. Acurácia da mensuração do enfisema pulmonar na tomografia computadorizada: pontos importantes Accuracy of measurement of pulmonary emphysema with computed tomography: relevant points

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    Bruno Hochhegger; Edson Marchiori; Klaus L. Irion; Hugo Oliveira

    2010-01-01

    Para garantir a confiabilidade dos dados de quantificação computadorizada do enfisema pulmonar (densitovolumetria pulmonar) na tomografia computadorizada, alguns aspectos técnicos devem ser considerados. A alteração das densidades na tomografia computadorizada com as mudanças no nível de inspiração e expiração do pulmão, com a espessura de corte da tomografia computadorizada, com o algoritmo de reconstrução e com o tipo de tomógrafo dificulta as comparações tomográficas nos estudos de acompan...

  2. Tomografia computadorizada da coluna lombar: analise de tres casos de metástase

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    Guilberto Minguetti

    1980-12-01

    Full Text Available A Tomografia Computadorizada (TC da coluna vertebral tem evoluido sensivelmente desde o advento dos tomógrafos computadorizados para corpo inteiro. Com a recente inclusão dos mecanismos de alta resolução (HR em tais equipamentos, mecanismos estes especialmente desenhados para observação detalhada das mais delicadas estruturas anatômicas, a avaliação das patologias associadas à coluna tem alcançado uma precisão há muito desejada. No presente trabalho os autores descrevem a anatomia normal da região lombar vista pela TC e analisam a localização, características e efeitos de três casos de metástase naquela região. Na opinião dos autores, além das informações acima referidas a TC permitiria ainda uma melhor planificação para uma eventual biópsia, seguimento radioterapêutico e mais adequada orientação diagnóstica e cirúrgica para qualquer tipo de patologia da coluna.

  3. Tumores primários da órbita incomuns diagnosticados por biópsia com agulha grossa guiada por tomografia computadorizada: relato de dois casos

    OpenAIRE

    Chiang Jeng Tyng; João Paulo Kawaoka Matushita Jr.; Almir Galvão Vieira Bitencourt; Flávia Branco Cerqueira Serra Neves; Maurício Kauark Amoedo; Paula Nicole Vieira Barbosa; Rubens Chojniak

    2014-01-01

    Biópsia percutânea guiada por tomografia computadorizada é uma alternativa segura e eficaz para avaliação de lesões intraorbitárias selecionadas, em que o diagnóstico pré-operatório é importante para o planejamento terapêutico. Descrevemos dois casos de pacientes com tumores orbitários incomuns em que o diagnóstico foi obtido por biópsia com agulha grossa guiada por tomografia computadorizada, dando ênfase para os aspectos técnicos do procedimento.

  4. Ruptura traumática do diafragma: aspectos na tomografia computadorizada Traumatic diaphragmatic rupture: computed tomography findings

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    Alessandro Severo Alves de Melo

    2002-11-01

    Full Text Available A ruptura traumática do diafragma é uma condição incomum, porém cada vez mais freqüentemente diagnosticada pela tomografia computadorizada, especialmente pela técnica helicoidal associada às reconstruções multiplanares, possibilitando a adoção de conduta terapêutica cirúrgica rápida e eficiente. Os autores estudaram seis pacientes com ruptura traumática do diafragma submetidos a tomografia computadorizada, que demonstrou herniação de estruturas abdominais para o interior do tórax através de área de ruptura na hemicúpula frênica esquerda em quatro casos; os outros dois pacientes foram submetidos a procedimento cirúrgico por trauma abdominal associado, que demonstrou lesões diafragmáticas, sem evidência de herniação na tomografia computadorizada.Traumatic diaphragmatic rupture is an uncommon condition that has been diagnosed more frequently with the aid of computed tomography, particularly when using helical technique in association with multiplanar reconstructions. This technique allows adoption of an efficient and quick surgical therapeutic approach. The authors studied six patients with traumatic diaphragmatic rupture that were submitted to computed tomography. In four of the patients there was herniation of intraabdominal viscera through a site of rupture in the left diaphragm. The two other patients underwent surgery due to abdominal injuries, which revealed diaphragmatic lesions but no herniation of intraabdominal viscera.

  5. Malária pulmonar: aspectos na tomografia computadorizada de alta resolução - relato de caso

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    Rodrigues Rosana

    2004-01-01

    Full Text Available Neste trabalho é relatado o caso de paciente do sexo masculino, de 38 anos de idade, que desenvolveu quadro de malária com comprometimento pulmonar. A tomografia computadorizada de alta resolução evidenciou espessamento de septos interlobulares e de bainhas peribroncovasculares, com áreas esparsas de atenuação em vidro fosco e de consolidações, além de derrame pleural bilateral, aspectos compatíveis com edema pulmonar. O paciente recebeu tratamento específico, evoluindo bem e tendo alta 11 dias após a internação.

  6. Lesões traumáticas do mediastino: aspectos na tomografia computadorizada Traumatic mediastinal lesions: computed tomography findings

    OpenAIRE

    Alessandro Severo Alves de Melo; Luiza Beatriz Melo Moreira; Edson Marchiori

    2003-01-01

    As lesões traumáticas mediastinais constituem achados pouco freqüentes no trauma torácico, mas são de extrema importância, por representarem mau prognóstico, dada a sua gravidade e lesões associadas. O trauma mediastinal é cada vez mais diagnosticado pela tomografia computadorizada, em especial pelo rápido tempo de aquisição decorrente da técnica helicoidal, que permite a avaliação de pacientes em estado grave, possibilitando a adoção de conduta terapêutica eficiente. Os autores estudaram 11 ...

  7. Tomografia computadorizada das células etmoidais intra e extramurais: ensaio iconográfico

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    Fabrício Guimarães Gonçalves

    2011-10-01

    Full Text Available O desenvolvimento dos seios paranasais é um processo intricado que se inicia na vida intrauterina e termina na idade adulta. Dos seios da face, as células etmoidais são provavelmente as estruturas mais complexas e as que estão associadas com o maior número de variantes da normalidade. Variações no padrão de pneumatização das células etmoidais podem ser divididas em intra ou extramurais. Intramurais são aquelas que ao se desenvolverem mantêm contato com o labirinto etmoidal, e extramurais as que se desenvolvem isoladamente. A tomografia computadorizada é a ferramenta mais útil na avaliação de processos inflamatórios dos seios paranasais. De igual modo, ela é importante para o planejamento pré-operatório e controle pós-operatório, pois possibilita grande detalhe anatômico das estruturas normais e detecção precisa de suas variantes. Neste ensaio iconográfico os autores descrevem as principais variantes da normalidade do labirinto etmoidal e suas relações com estruturas adjacentes. Cirurgias endoscópicas para o tratamento de afecções dos seios paranasais têm-se tornado cada vez menos invasivas, o que certamente aumentará a demanda por relatórios de imagem cada vez mais ricos em detalhes desta região.

  8. Tomografia Computadorizada de crânio em perícias criminais: uma grande aliada

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    Márcio Gleidson Ribeiro Dias

    2016-11-01

    Full Text Available O presente estudo trata-se de uma revisão descritiva da literatura sobre as principais vantagens da Tomografia Computadorizada (TC de crânio na área de Criminologia. Para a revisão literária foram utilizados artigos e dissertações recentes publicados entre 2007 e 2016, livros de imagenologia e medicina legal. A partir dos dados obtidos na revisão literária, nós realizamos uma descrição sobre a TC e sua evolução ao longo dos anos, suas vantagens e aplicações em perícias criminais. Destacamos a importância do laudo pericial, a responsabilidade do perito criminal, a fisiopatologia do trauma cranioencefálico e a sua relação com a violência urbana.Entre as vantagens da virtópsia em relação aos métodos tradicionais destacam-se a preservação do corpo, o arquivamento das imagens e a capacidade de identificação de vítimas através de imagens comparativas ante mortem e post mortem. Assim, a TC tem se tornado cada vez mais presente nas investigações criminais como uma tecnologia de baixo custo que é capaz de localizar, quantificar e evidenciar o trajeto de projéteis, auxiliando na identificação de cadáveres e causas da morte.

  9. Quando a fase de equilíbrio pode ser suprimida nos exames de tomografia computadorizada de abdome?

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    Priscila Silveira Salvadori

    2013-04-01

    Full Text Available OBJETIVO: Avaliar a necessidade de realização da fase de equilíbrio nos exames de tomografia computadorizada de abdome. MATERIAIS E MÉTODOS: Realizou-se estudo retrospectivo, transversal e observacional, avaliando 219 exames consecutivos de tomografia computadorizada de abdome com contraste intravenoso, realizados num período de três meses, com diversas indicações clínicas. Para cada exame foram emitidos dois pareceres, um avaliando o exame sem a fase de equilíbrio (primeira análise e o outro avaliando todas as fases em conjunto (segunda análise. Ao final de cada avaliação, foi estabelecido se houve mudança nos diagnósticos principais e secundários, entre a primeira e a segunda análise. Foi utilizada a extensão do teste exato de Fisher para avaliar a modificação dos diagnósticos principais (p 0,999. Com relação aos diagnósticos secundários, cinco exames (2,3% foram modificados. CONCLUSÃO: Para indicações clínicas como estadiamento tumoral, abdome agudo e pesquisa de coleção abdominal, a fase de equilíbrio não acrescenta contribuição diagnóstica expressiva, podendo ser suprimida dos protocolos de exame.

  10. Avaliação da reprodutibilidade da tomografia computadorizada no estadiamento da pancreatite aguda Reproducibility in the assessment of acute pancreatitis with computed tomography

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    Edison de Oliveira Freire Filho

    2007-12-01

    Full Text Available OBJETIVO: Medir a reprodutibilidade da tomografia computadorizada sem e com contraste na avaliação da gravidade da pancreatite aguda. MATERIAIS E MÉTODOS: Cinqüenta e um exames de tomografia computadorizada abdominal sem e com contraste de pacientes com pancreatite aguda foram analisados por dois radiologistas (observadores 1 e 2. Calculamos o índice morfológico pela tomografia computadorizada sem e com contraste, separadamente, e o índice de gravidade da tomografia computadorizada para pancreatite aguda. Medimos a reprodutibilidade intra- e interobservador da tomografia computadorizada através do índice kappa (kapa. RESULTADOS: Para a concordância interobservador obtivemos kapa de 0,666, 0,705, 0,648, 0,547 e 0,631 para índice morfológico sem e com contraste, presença de necrose pancreática, extensão da necrose pancreática e índice de gravidade da tomografia computadorizada, respectivamente. Para a concordância intra-observador dos observadores 1 e 2 obtivemos, respectivamente, kapa de 0,796 e 0,732 para o índice morfológico sem contraste; 0,725 e 0,802 para o índice morfológico com contraste; 0,674 e 0,849 para a presença de necrose pancreática; 0,606 e 0,770 para a extensão da necrose pancreática; e 0,801 e 0,687 para o índice de gravidade da tomografia computadorizada. CONCLUSÃO: O estadiamento da pancreatite aguda pela tomografia computadorizada por meio do índice morfológico e do índice de gravidade da tomografia computadorizada é um método bastante reprodutível. O não-uso do contraste não afeta a reprodutibilidade da tomografia computadorizada para o cálculo do índice morfológico.OBJECTIVE: To evaluate the reproducibility of unenhanced and contrast-enhanced computed tomography in the assessment of patients with acute pancreatitis. MATERIALS AND METHODS: Fifty-one unenhanced and contrast-enhanced abdominal computed tomography studies of patients with acute pancreatitis were blindly reviewed by two

  11. Perfusão miocárdica dinâmica por tomografia computadorizada de dupla fonte de raio X

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    José Rodrigues Parga Filho

    2012-03-01

    Full Text Available Relatamos caso de perfusão dinâmica e quantitativa pela tomografia computadorizada de múltiplos detectores de dupla fonte de Raio X em um paciente de 44 anos, com diagnóstico prévio de doença coronariana. A tomografia demonstrou quantitativamente déficit de perfusão miocárdica nos territórios irrigados por artérias com estenoses significativas confirmadas pela angiotomografia e pela cineangiocoronariografia. A tomografia computadorizada com dupla fonte de Raio X permitiu a avaliação dinâmica perfusional e anatômica, em um único estudo, durante o controle evolutivo desse paciente.

  12. Necessidade de tomografia computadorizada em pacientes com trauma cranioencefálico de grau leve

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    Giuliana Ribeiro Lesur

    2015-10-01

    Full Text Available O traumatismo cranioencefálico (TCE é avaliado pela Escala de Coma de Glasgow (ECG e pontuado como grave (3 a 8, moderado (9 a 13 e leve (14 e 15. Geralmente o grau do TCE relaciona-se às lesões diagnosticadas pela Tomografia Computadorizada (TC. Porém, essa correlação nem sempre ocorre no TCE leve, o que torna questionável a necessidade da TC, sendo dispensada ou indicada a partir de critérios de suspeita de lesão. Durante 3 meses, foram avaliados 45 pacientes admitidos na emergência do CHS, a partir de dados das fichas de atendimento, coletados por um formulário elaborado pelos autores, como ECG leve e dados clínicos e pessoais (nome, idade, gênero e indicações da TC, e os laudos. Dos 45 casos, 12 (26,7% tinham EGC 14 e 33 (73,3% ECG 15. Quanto ao gênero, 30 (66,6% eram homens. Quanto ao mecanismo de trauma, encontramos 3 (6,7% atropelamentos, 5 (11,1% eventos envolvendo automóveis, 15 (33,3% envolvendo motocicletas, 19 (42,2% quedas e 3 (6,7% vítimas de agressão. Nas suspeitas de lesões, as indicações de TC foram 31 (68,9% perdas de consciência, 3 (6,7% ECG menor que 15 até 2 horas da admissão, 1 (2,2% suspeita de afundamento de crânio, 7 (15,5% vômitos, 5 (11,1% idade superior a 65 anos, 14 (31,1% amnésia para fatos anteriores ao trauma e 31 (68,9% mecanismos de trauma perigoso. Nos 5 pacientes com lesões intracranianas, sendo 1 (8,3% com ECG 14 e 4 (12,1% com ECG 15, as indicações de TC mais prevalentes foram: perda de consciência em 4 (80% e mecanismo de trauma perigoso em 3 (60%. Conclui-se que pacientes com trauma de crânio leve, que apresentem ao menos um dos sinais ou sintomas de presença de lesão, devem ser submetidos a TC de crânio para avaliar a necessidade de avaliação neurocirúrgica.

  13. Radiograma de tórax e tomografia computadorizada na avaliação do enfisema pulmonar

    OpenAIRE

    Irion, Klaus Loureiro; Hochhegger, Bruno; Marchiori, Edson; Nelson da Silva PORTO; Baldisserotto,Sérgio de Vasconcellos; Santana,Pablo Rydz

    2007-01-01

    O enfisema é uma condição do pulmão, caracterizada pelo aumento acima do normal no tamanho dos espaços aéreos distais ao bronquíolo terminal. Atualmente, o enfisema é a quarta causa de morte nos EUA, afetando 14 milhões de pessoas. O presente artigo descreve as principais ferramentas no diagnóstico por imagem do enfisema, desde o início até os dias de hoje. Relata as técnicas tradicionais, como radiograma de tórax, e as evoluções no campo da tomografia computadorizada (TC), como a TC de alta ...

  14. Manifestações clínicas de pacientes com diagnóstico de neurocisticercose por tomografia computadorizada

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    PFUETZENREITER MÁRCIA REGINA

    1999-01-01

    Full Text Available Foram estudados através de entrevistas semi-estruturadas pacientes submetidos a tomografia computadorizada de crânio em um centro de diagnóstico por imagem na cidade de Lages. Realizaram-se entrevistas em 42 pacientes positivos para cisticercose cerebral e 57 pacientes sem alterações patológicas ao referido exame. Os pacientes com diagnóstico positivo relataram com maior frequência manifestações clínicas relacionadas à neurocisticercose, sendo este fato mais marcante para o sexo feminino, com exceção de convulsões, que ocorreram mais no sexo masculino (19,05% que no feminino (7,14%. A maior percentagem de diagnósticos de formas inativas (83,33% e o relato de sintomas em um tempo mais prolongado entre os entrevistados positivos sugerem que o problema é antigo.

  15. Avaliação por tomografia computadorizada do envolvimento loco-regional do carcinoma espinocelular de corda vocal

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    Paiva Roberto Guido Santos

    2001-01-01

    Full Text Available No período de 1992 a 1998, foram avaliados, retrospectivamente, exames de tomografia computadorizada e prontuários de 22 pacientes com carcinoma espinocelular de corda vocal. Avaliou-se a concordância entre observadores para todos os casos e a acurácia e concordância entre os métodos para os casos operados, utilizando-se o índice kappa. A concordância foi excelente para o comprometimento tumoral das cartilagens tireóide, cricóide, extensão extralaríngea e estadiamento linfonodal; ótima para o envolvimento tumoral das cordas vocais, comissura posterior e espaço paraglótico; boa para o envolvimento tumoral da supraglote, subglote e estadiamento tumoral; regular para o envolvimento tumoral da comissura anterior e cartilagem aritenóide. A utilização simultânea da avaliação clínica e tomográfica para o estadiamento T obteve acurácia e concordância com achados patológicos de 89,47% e 84,9%, respectivamente, sendo superior à análise clínica isolada ou tomográfica. A acurácia e concordância patológica da tomografia computadorizada para o estadiamento N foi de 100%, sendo superior à avaliação clínica.

  16. Infecção pulmonar pelo Rhodococcus equi na síndrome da imunodeficiência adquirida: Aspectos na tomografia computadorizada

    OpenAIRE

    Edson Marchiori; Renato Gonçalves de Mendonça; Domenico Capone; Elza Maria de Cerqueira; Arthur Soares Souza Júnior; Gláucia Zanetti; Dante Escuissato; Emerson Gasparetto

    2006-01-01

    OBJETIVO: Apresentar os aspectos na tomografia computadorizada da pneumonia pelo Rhodococcus equi em sete pacientes com síndrome da imunodeficiência adquirida. MÉTODOS: Estudo retrospectivo das tomografias de sete pacientes com síndrome da imunodeficiência adquirida e infecção pelo Rhodococcus equi. RESULTADOS: Os achados mais freqüentes foram: consolidação (n = 7) com escavação (n = 6), opacidades em vidro fosco (n = 6), nódulos do espaço aéreo (n = 4) e nódulos centrolobulares com árvore em...

  17. The importance of investigation of anatomic variations in the ethmoid cells by computerized tomography in the planning of endoscopic nasal surgery; A importancia da investigacao de variacoes anatomicas das celulas etmoidais atraves da tomografia computadorizada no planejamento da cirurgia endoscopica nasal

    Energy Technology Data Exchange (ETDEWEB)

    Ruiz, Cristiane Regina; Wafae, Nader; Nascimento, Sergio Ricardo Rios; Camelo, Julio Cesar; Maciel, Luana Teixeira; Consolari, Mario Agostinho Severo [Centro Universitario Sao Camilo, Sao Paulo, SP (Brazil)], e-mail: crisruiz@saocamilo-sp.br, e-mail: riosnascimento@uol.com.br

    2009-01-15

    The ethmoidal cells comprise many cavities that show many anatomical variations. Some of these variations deserve special attention when associated with sinusitis and the need of surgery. Computed tomography, considered a gold standard on the pathological investigation of the nasal cavity and the anatomic description of paranasal sinus, offers information about these cells, essential to minimize the surgical risks. The authors present a bibliographic revision of the importance of computed tomography on the investigation of anatomic variations of ethmoid cells. Not recurrent cells in all individuals, like Haller's cells, Onodi's cells and pneumatization of agger nasi, will do the endoscopic approach with precaution. The ethmoidal roof evaluation will result in more safety on the upper limits of the nasal cavity. The size and pneumatization level of ethmoidal bulla, ethmoidal crest, and middle nasal concha are important on the evaluation of the endoscopic accesses and the gravity of the stroked pathology and even diagnose your origin. (author)

  18. Tomografia computadorizada na avaliação da densidade de um solo do semi-árido brasileiro

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    L. Fante Junior

    2002-12-01

    Full Text Available A densidade do solo de amostras indeformadas foi determinada por meio das técnicas de tomografia computadorizada e do torrão impermeabilizado, visando à identificação de processos de compactação do solo e a comparação de métodos. A pesquisa também visou auxiliar um levantamento pedológico elaborado com fins de classificação de terras para irrigação. As amostras de solo foram coletadas da região semi-árida de Petrolina (PE, ao longo de perfis do solo, da superfície até 1 m de profundidade, em camadas de 0,1 m e em duas áreas distintas quanto à sua ocupação vegetal e manejo: (1 vegetação natural (caatinga; (2 área cultivada e irrigada por pivô central. As tomografias foram realizadas com um tomógrafo de primeira geração, constituído por uma fonte de radiação gama de 137Cs e um detetor cintilador de NaI(Tl, com eletrônica padrão de espectrometria gama e sistema de movimentação de amostra controlados por uma interface específica acoplada a um microcomputador. Na área de caatinga, os resultados evidenciam a ocorrência de um adensamento do solo em camadas mais profundas, abaixo de 0,4 m, bem como de uma camada adensada e, ou, compactada entre aproximadamente 0 e 0,4 m, na área cultivada com pivô central, possivelmente em virtude da ação de máquinas e implementos utilizados no preparo e cultivo do solo.

  19. Retrospective study of computed tomography of nasal cavity in small animal at FMVZ - UNESP, Botucatu, and correlation of changes with cytological and/or histopathological exams; Estudo retrospectivo de tomografia computadorizada da cavidade nasal em pequenos animais na FMVZ - UNESP, Botucatu, e correlacao das alteracoes com os exames citologico e/ou histopatologico

    Energy Technology Data Exchange (ETDEWEB)

    Belotta, Alexandra Frey; Inamassu, Leticia Rocha; Mamprim, Maria Jaqueline; Machado, Vania Maria de Vasconcelos; Vulcano, Luiz Carlos, E-mail: a_fbelotta@yahoo.com.br [Universidade Estadual Paulista Julio de Mesquita Filho (FMVZ/UNESP), Botucatu, SP (Brazil). Faculdade de Medicina Veterinaria e Zootecnia. Dept. de Reproducao Animal e Radiologia Veterinaria; Zardo, Karen Maciel

    2012-07-01

    It was conducted a retrospective study of computed tomography (CT) scans of nasal cavity in small animal at this institution during the period of April 2007 through June 2012. In total, 47 CT scans were performed during the period and, of these, only 25 underwent additional exams (cytological and/or histopathological). 20 exams suggested a diagnosis, 4 were inconclusive and one had no change. A correlation was made between tomographic findings and cytological/histopathological diagnosis providing an accurate assessment of neoplastic versus non-neoplastic disease. (author)

  20. Computerized tomography findings in Fahr's syndrome Achados da tomografia computadorizada na síndrome de Fahr

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    Andréia V. Faria

    2004-09-01

    Full Text Available We analyzed computerized tomography (CT findings in six patients with Fahr's syndrome. They presented calcifications in basal ganglia, dentate nucleus, subcortical region and semioval center, due to alteration in calcium metabolism or due to senile relative hypoxemic state. The image pattern was not strictly related with etiology, although some differences in dystrophic senile calcifications (the only one present in semioval center and absent in subcortical region. CT is an easy exam, has maximum sensitivity and allows diagnosis, contributing to early treatment of many etiologies of Fahr's syndrome.Analisamos os achados de tomografia computadorizada (TC de seis pacientes com síndrome de Fahr. Eles apresentaram calcificações nos gânglios da base, núcleo denteado, região subcortical e centro semi-oval, devidas a distúrbios no metabolismo do cálcio ou a estado de hipóxia relativa, por senilidade. O padrão de imagem não apresenta relação clara com a etiologia, apesar de algumas diferenças no caso das calcificações distróficas senis (as únicas presentes nos centros semi-ovais e ausentes na região subcortical. TC é um exame de fácil realização, máxima sensibilidade e permite o diagnóstico, contribuindo para o tratamento precoce de muitas das etiologias da síndrome de Fahr.

  1. LINFOMAS PULMONARES: CORRELAÇÃO DA TOMOGRAFIA COMPUTADORIZADA DE ALTA RESOLUÇÃO COM A ANATOMOPATOLOGIA

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    Marchiori Edson

    2002-01-01

    Full Text Available Neste trabalho são descritos os aspectos tomográficos de alta resolução dos linfomas pulmonares e feita correlação com os achados anatomopatológicos. Com este objetivo, foram revisados as tomografias computadorizadas de alta resolução do tórax e os dados histopatológicos de dez pacientes com diagnóstico confirmado de linfoma não-Hodgkin ou de doença de Hodgkin. Os resultados obtidos foram confrontados com os descritos na literatura. Os achados radiológicos mais comumente vistos neste estudo foram as consolidações parenquimatosas, localizadas, com broncogramas aéreos de permeio (n = 8. Em menor freqüência, foram encontrados múltiplos nódulos parenquimatosos (n = 4, espessamento peribroncovascular (n = 3 e opacidades em vidro fosco (n = 2. Na correlação com a anatomia patológica, as consolidações corresponderam a preenchimento alveolar por células neoplásicas, o espessamento peribroncovascular se deveu a infiltração das bainhas peribroncovasculares por células linfomatosas e a atenuação em vidro fosco se associou com infiltração dos septos alveolares por tais células.

  2. A neurocisticercose no Rio Grande do Norte antes e depois da tomografia computadorizada: apresentação de um caso

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    Ivanilton Galhardo

    1993-11-01

    Full Text Available Os autores fazem referência ao aparecimento de vários casos de neurocisticercose no Rio Grande do Norte após a chegada da tomografia computadorizada (TC ao Estado e enfatizam esse tipo de exame para o diagnóstico da parasitose no sistema nervoso. Apresentam um caso como sendo o primeiro diagnosticado e divulgado no Congresso Brasileiro de Neurologia realizado em Porto Alegre - RS, em outubro-1992. O diagnóstico foi feito, especialmente, pela TC e pela reação de hemaglutinação no líquido céfaloraqueano.

  3. Estudo anatômico e morfométrico da orelha interna da ovelha : através da tomografia computadorizada

    OpenAIRE

    Valter Alberto Ayres Seibel

    2004-01-01

    INTRODUÇÃO: Os trabalhos sobre o uso de ovelhas para cirurgia experimental e treinamento em cirurgia otológica são raros. O presente trabalho estuda a orelha interna da ovelha por meio de tomografia computadorizada e cortes sucessivos de 0,5 mm, no sentido de apresentar dados morfométricos mais precisos relacionados à comparação entre a orelha de ovelhas e a orelha humana. MATERIAIS e MÉTODO: Foi realizado um estudo descritivo sem seguimento no qual foram comparadas as estruturas da orelha in...

  4. Comparação morfométrica da orelha interna entre ovinos e humanos através da tomografia computadorizada

    OpenAIRE

    Valter Ayres Seibel; Luiz Lavinsky; Klaus Irion

    2006-01-01

    INTRODUÇÃO: trabalhos sobre o uso de ovelhas em cirurgias experimentais e treinamento em cirurgia otológica são raros. Este estudo pretende contribuir para ampliar o conhecimento nessa área. OBJETIVO: Estudar a orelha interna da ovelha por meio de tomografia computadorizada e cortes sucessivos com o intuito de apresentar dados morfométricos mais precisos relacionados à comparação entre a orelha de ovelhas e a de humanos. MATERIAL E MÉTODO: Foi realizado um estudo descritivo sem seguimento no ...

  5. Controle de qualidade e dosimetria em equipamentos de tomografia computadorizada Quality control and dosimetry in computed tomography units

    Directory of Open Access Journals (Sweden)

    Diana Rodrigues de Pina

    2009-06-01

    Full Text Available OBJETIVO: Avaliação de condições dos equipamentos e dosimetria em setores de tomografia computadorizada utilizando protocolos de cabeça, abdome e coluna lombar em pacientes adultos (em três equipamentos distintos e pediátricos com até um ano e meio de vida (em um dos equipamentos avaliados. MATERIAIS E MÉTODOS: Foram estimados o índice de dose em tomografia computadorizada e a dose média em cortes múltiplos, em exames com pacientes adultos, em três distintos equipamentos. Ainda foram estimadas as doses na superfície de entrada e as doses absorvidas em exame de cabeça para pacientes adultos e pediátricos em um dos equipamentos avaliados. RESULTADOS: Foram realizados testes de controle de qualidade, mecânicos, demonstrando que os equipamentos satisfazem as especificações de uso estabelecidas pelas normas vigentes. Os resultados da dosimetria mostraram que valores de dose média em cortes múltiplos excederam em até 109,0% os valores de níveis de referência, apresentando consideráveis variações entre os equipamentos avaliados neste estudo. As doses absorvidas obtidas com protocolos pediátricos são inferiores aos de pacientes adultos, apresentando redução de até 51,0% na tireoide. CONCLUSÃO: Neste estudo foram avaliadas as condições de operação de três equipamentos tomográficos, estabelecendo quais parâmetros devem ser trabalhados para a implantação de um programa de controle de qualidade nas instituições onde esta pesquisa foi desenvolvida.OBJECTIVE: Evaluation of equipment conditions and dosimetry in computed tomography services utilizing protocols for head, abdomen, and lumbar spine in adult patients (in three different units and pediatric patients up to 18 months of age (in one of the units evaluated. MATERIALS AND METHODS: Computed tomography dose index and multiple-scan average dose were estimated in studies of adult patients with three different units. Additionally, entrance surface doses as well as

  6. Tomografia computadorizada sem contraste intravenoso no abdome agudo: quando e por que usar When and why use unenhanced computed tomography in patients with acute abdomen

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    Edison de Oliveira Freire Filho

    2006-02-01

    Full Text Available A tomografia computadorizada sem contraste intravenoso tem sido freqüentemente proposta na avaliação inicial de pacientes com suspeita de abdome agudo, ocupando o espaço de outros métodos diagnósticos. Os autores apresentam uma revisão bibliográfica dos principais aspectos e eficácia da tomografia computadorizada sem contraste intravenoso no diagnóstico de apendicite aguda, cólica nefrética, diverticulite, pancreatite aguda, apendicite epiplóica, pneumoperitônio e obstrução intestinal. Discutem quais as vantagens e limitações desta técnica de exame, bem como seus aspectos práticos.The use of unenhanced computed tomography has been frequently recommended for the initial assessment of patients with clinical suspicion of acute abdomen instead of other diagnostic methods. The authors present a review of the literature on the main aspects, advantages, limitations and efficacy of unenhanced computed tomography for the diagnosis of acute appendicitis, renal colic, diverticulitis, acute pancreatitis, primary epiploic appendicitis, pneumoperitoneum and small bowel obstruction. The advantages and limitations of this technique are also discussed.

  7. Avaliação da concordância interobservadores na análise da polipose nasossinusal por meio da tomografia computadorizada Evaluation of the concordance between observers in sinunasal polyposis through computed tomographic analysis

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    Elaine A. Mendes

    2004-08-01

    Full Text Available Polipose nasossinusal (PNS é uma entidade de etiologia controversa, caracterizada por uma condição inflamatória da superfície mucosa das fossas nasais e seios paranasais, bilateralmente. A queixa principal do paciente consiste na obstrução nasal e, ao exame físico, observam-se freqüentemente massas polipóides ocupando as cavidades nasais em extensões variáveis. Além da rinoscopia anterior e da endoscopia nasal, o uso da tomografia computadorizada (TC torna-se necessário para avaliação das fossas nasais e da presença ou não do acometimento dos seios paranasais por essas massas, bem como a sua extensão. Este trabalho tem como objetivo avaliar a concordância interobservadores, por meio da análise da tomografia computadorizada, de 32 casos de PNS. FORMA DE ESTUDO: Clínico prospectivo. CASUÍSTICA E MÉTODOS: Foram avaliadas 32 TC de pacientes portadores PNS por dois observadores experientes, separadamente, em relação à presença ou não de 3 sinais tomográficos sugestivos dessa doença: (1 alargamento infundibular do complexo ostiomeatal, (2 abaulamento lateral da lâmina papirácea e (3 apagamento do trabeculado ósseo etmoidal. RESULTADOS: Observou-se Qui-quadrado não significante para o primeiro e segundo sinais (p=0,7055 e p=0,2057 e significante para o terceiro (p=0,0040. Contudo, o coeficiente de correlação de Kendall entre os dois observadores foi significante para os três sinais tomográficos acima citados (pSinonasal polyposis (SNP is a condition with a controversial aethiology, known by bilaterally inflammatory mucous membranes of nasal and paranasal sinuses. The major patient's complaint is nasal obstruction, and polypoid masses in different sizes can be found during nasal cavity examination. Beyond anterior rhinoscophy and nasal endoscopy, screening sinus computed tomography (SSCT is necessary to measure the size and the extent of the polyps into nasal cavities and paranasal sinuses. The purpose of this

  8. Tomografia computadorizada no diagnóstico da otosclerose retrofenestral Computed tomography in the diagnosis of retrofenestral otosclerosis

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    Andy de Oliveira Vicente

    2004-01-01

    Full Text Available OBJETIVO: Identificar os principais achados tomográficos da otosclerose retrofenestral. MÉTODO: Estudo prospectivo multicêntrico com tomografia computadorizada (TC de ossos temporais em 54 pacientes com diagnóstico clínico e cirúrgico de otosclerose. Foi realizada uma análise tomográfica, em que foi avaliada a utilidade da TC no diagnóstico radiológico da otosclerose retrofenestral, sendo verificados os principais sítios de lesões dessa doença. Foram incluídos neste estudo 22 pacientes submetidos à TC de ossos temporais para investigação de outras afecções otológicas, que constituíram o grupo controle. RESULTADOS: Os achados tomográficos foram bilaterais na maioria dos casos e o foco retrofenestral mais prevalente foi o foco pericoclear. CONCLUSÕES: A TC monstrou-se útil na identificação dos focos retrofenestrais. A evidência tomográfica desses focos juntamente com o envolvimento endosteal da cóclea podem sugerir uma maior atividade da doença.AIM: To identify the main tomographic findings of retrofenestral otosclerosis. METHODS: A prospective and multicentric study using computed tomography (CT of the temporal bone in 54 patients with a clinical and surgical diagnosis of otosclerosis. A tomographic analysis has been performed to evaluate the utility of CT scans in diagnosing retrofenestral otosclerosis, verifying the sites of predilection for otosclerotic lesions. In this study, 22 patients undergone CT scans of temporal bones have been included in order to investigate other otologic diseases and have constituted the control group. RESULTS: The tomographic findings were mostly bilateral and the retrofenestral focus more prevalent was the pericochlear focus. CONCLUSIONS: The CT scan was useful in the identification of the retrofenestral focuses. The evidence of this focuses and the presence of the endosteal involvement of the cochlea can suggest a higher activity of the disease.

  9. Proptose ocular como manifestação clínica de tumores malignos extra-orbitários: estudo pela tomografia computadorizada

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    Baptista Ana Célia

    2003-01-01

    Full Text Available Doenças sistêmicas, doenças orbitárias primárias e lesões extra-orbitárias com extensão secundária para a órbita podem causar proptose ocular. Foram estudados, por tomografia computadorizada, 11 pacientes com proptose ocular causada por tumores malignos extra-orbitários, sem qualquer tratamento prévio do tumor. Houve predomínio de neoplasias não-epiteliais (82%, tendo sido três rabdomiossarcomas (27% e três linfomas não-Hodgkin (27%. Outros sarcomas estiveram presentes em dois casos (18%, seguidos por linfoma de Burkitt (9%, carcinoma epidermóide (9% e carcinoma pouco diferenciado (9%. Nove tumores (82% tiveram origem nas cavidades sinonasais, a maioria (cinco casos com origem no seio etmoidal. Proptose ocular foi a única alteração oftálmica em quatro casos (36%, e um paciente teve proptose ocular bilateral como único sinal da doença. Dezessete órbitas foram acometidas pelos 11 tumores, já que seis pacientes tiveram comprometimento orbitário tumoral bilateral. Os tumores se estenderam às órbitas preferencialmente através da parede óssea orbitária (16 órbitas; 94%. Das 17 órbitas comprometidas, a maioria (59% teve todos os compartimentos lesados. Em 16 órbitas o tumor apresentou situação extraconal. À tomografia computadorizada, proptose ocular esteve presente em 15 das 17 órbitas (88%, tendo sido bilateral em quatro casos (oito órbitas. Houve predomínio de proptose ocular grau 2 à tomografia computadorizada (sete pacientes; 47%. Um total de 44 regiões crânio-faciais foi comprometido, além da órbita e do sítio de origem da neoplasia, indicando a grande extensão loco-regional desses tumores no momento do diagnóstico.

  10. Tomografia computadorizada helicoidal dos seios paranasais na criança: avaliação das sinusopatias inflamatórias Helical computed tomography of the paranasal sinuses in children: evaluation of sinus inflammatory diseases

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    Luiz Dias Dutra

    2002-06-01

    Full Text Available Neste estudo foi feita avaliação retrospectiva de 71 casos selecionados de pacientes pediátricos, maiores de um ano e menores de sete anos, que realizaram exame de tomografia computadorizada helicoidal dos seios paranasais no período de março de 1997 a abril de 1998, apresentando quadro clínico de sinusopatia inflamatória aguda recorrente e sinusopatia inflamatória crônica. Foram correlacionados os quadros clínicos com os achados da tomografia computadorizada helicoidal, avaliando a pneumatização dos seios paranasais, os complexos óstio-meatais, as variações anatômicas, o estado da superfície mucosa e a extensão lesional. Os achados tomográficos de maior prevalência foram o velamento total ou parcial de uma ou mais cavidades paranasais (92,9%, seguido da hipertrofia da mucosa de revestimento (67,6%. Houve, na maioria dos casos, associação entre a sinusopatia inflamatória e a obstrução dos complexos óstio-meatais (53,5%. As variações anatômicas foram identificadas já a partir de um ano, com predomínio dos desvios do septo nasal (14,1%, estando correlacionadas às sinusopatias inflamatórias em cerca de 71% dos pacientes.We conducted a retrospective analysis of 71 selected pediatric patients, aged 1 to 7 years, which were submitted to helical computed tomography examination of the paranasal sinuses in the period between March, 1997 and April, 1998 due to recurrent acute sinusitis and chronic sinusitis. Clinical and helical computed tomography findings were compared by evaluating the pneumatization of the paranasal sinuses, ostiomeatal complexes, anatomic variants, the status of mucosal surface and lesion extension. The most common CT findings were total or partial opacification of one or more paranasal cavities (92.9%, followed by mucosal thickening (67.6%. In the majority of cases there was association between sinusitis and ostiomeatal obstruction. Anatomic variants were identified from the age of one year. The most

  11. Comprometimento órbito-craniano por tumores malignos sinonasais: estudo por tomografia computadorizada Sinonasal malignant tumors involvement of the orbit and skull: a computed tomography study

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    Ana Célia Baptista

    2002-10-01

    Full Text Available Tumores malignos das cavidades sinonasais são raros e freqüentemente diagnosticados em estágio avançado da doença. A extensão destes tumores para locais críticos como a órbita e o crânio gera dificuldades no tratamento destas lesões. Dez pacientes com neoplasia maligna sinonasal, sem qualquer tratamento prévio e com evidência radiológica de extensão órbito-craniana, foram estudados por tomografia computadorizada. Dos dez tumores, cinco (50% foram neoplasias epiteliais, tendo sido a mais comum o carcinoma epidermóide (três casos. O sítio de origem tumoral mais comum foi o seio etmoidal, em quatro pacientes (40%, seguido pelo seio maxilar (30% e pela fossa nasal (30%. Dezesseis órbitas foram comprometidas, já que seis pacientes (60% apresentaram acometimento orbitário tumoral bilateral. Os tumores se estenderam mais freqüentemente para as órbitas através de erosão da parede medial e do soalho orbitários. A maioria das órbitas teve todos os compartimentos acometidos. Extensão dos tumores para a cavidade craniana foi mais comum através do teto etmoidal (70% e teto orbitário (30%. A fossa craniana anterior foi acometida em oito casos (80%, seguida pela fossa craniana média (40% e pelo lobo frontal (excluindo-se a fossa anterior (30%. Trinta e sete regiões da face foram acometidas pelos dez tumores, excluindo-se o sítio de origem da neoplasia e a região órbito-craniana, corroborando a grande extensão loco-regional do tumor no momento do diagnóstico.Malignant tumors of the sinonasal cavities are rare and often diagnosed late in the course of the disease. These tumors can extend into regions such as the orbit and brain, where treatment is difficult. Ten patients with nontreated sinonasal malignant neoplasms and radiological evidence of tumor extension into the orbit and brain were studied with computed tomography. Five (50% tumors were epithelial neoplasms whereas squamous cell carcinoma was the most common type (3

  12. O idoso no centro de diagnóstico por imagem : segurança na realização da tomografia computadorizada cardíaca

    OpenAIRE

    Acauan, Laura Vargas

    2013-01-01

    A segurança do paciente é um aspecto crítico da atenção à saúde nos serviços de saúde, e seus determinantes e condicionantes estão vinculados a ações inerentes à assistência. Os idosos constituem parcela populacional que mais cresce no mundo, e com o avanço da idade há aumento no número de doenças crônicas, portanto, são mais vulneráveis à ocorrência de eventos e reações adversas durante seu cuidado. Com a evolução tecnológica na área de imagem, a tomografia computadorizada cardíaca- angiotom...

  13. Sarcoidose pulmonar: achados na tomografia computadorizada de alta resolução Pulmonary sarcoidosis: high-resolution computed tomography findings

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    Bruno Barcelos da Nóbrega

    2005-06-01

    Full Text Available A sarcoidose é uma doença sistêmica de causa indeterminada, caracterizada por granulomas não-caseosos. Embora possa afetar qualquer órgão, esta doença tem sua morbi-mortalidade relacionada principalmente ao acometimento pulmonar, presente em 80% a 90% dos pacientes. Este artigo ilustra as principais manifestações pulmonares da sarcoidose na tomografia computadorizada de alta resolução, incluindo as formas típicas e atípicas.Sarcoidosis is a systemic disease of unknown etiology, characterized by noncaseating granulomas. Although it may affect any organ, morbidity and mortality are most commonly related to pulmonary involvement, which is found in 80-90% of patients. This study illustrates the principal manifestations of sarcoidosis seen in high-resolution computed tomography scans, including typical as well as atypical forms.

  14. Correlação entre imagens de tomografia computadorizada e cortes anatômicos do encéfalo de cães

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    Páfaro, Vanessa [UNESP

    2012-01-01

    Visto a crescente importância das afecções neurológicas na clínica médica veterinária e a escassez de informações em relação aos aspectos tomográficos normais da anatomia encefálica, este estudo objetivou estabelecer a descrição anatômica detalhada de imagens tomográficas do encéfalo normal de cães, utilizando como referências imagens anatômicas de cortes transversais corados, com espessuras semelhantes aos planos das imagens da tomografia computadorizada. Para tanto foram realizados exames d...

  15. Correlação entre imagens de tomografia computadorizada e cortes anatômicos do encéfalo de cães

    OpenAIRE

    Páfaro, Vanessa [UNESP

    2012-01-01

    Visto a crescente importância das afecções neurológicas na clínica médica veterinária e a escassez de informações em relação aos aspectos tomográficos normais da anatomia encefálica, este estudo objetivou estabelecer a descrição anatômica detalhada de imagens tomográficas do encéfalo normal de cães, utilizando como referências imagens anatômicas de cortes transversais corados, com espessuras semelhantes aos planos das imagens da tomografia computadorizada. Para tanto foram realizados exames d...

  16. Avaliação da inclinação do incisivo inferior através da tomografia computadorizada Computed tomographic evaluation of inferior incisor position

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    Leopoldino Capelozza Filho

    2008-12-01

    Full Text Available INTRODUÇÃO: durante muito tempo, a Ortodontia baseou-se em valores normativos obtidos através das análises cefalométricas existentes, utilizando a telerradiografia em norma lateral como exame principal no diagnóstico ortodôntico, ditando o plano de tratamento. O incisivo inferior, em particular, recebeu normas cefalométricas propostas por diversos autores, dentre eles Tweed. Entretanto, os exames radiográficos possuem limitações, pois, em uma imagem bidimensional de uma estrutura tridimensional, a superposição de determinadas estruturas ósseas e dentárias é constante. O advento da tomografia computadorizada disponibilizou meios diagnósticos mais precisos e confiáveis, principalmente pela possibilidade de obtenção da imagem das estruturas em três dimensões. Nesse contexto, parece razoável questionar os dados oriundos da análise clássica da radiografia lateral da face, com intuito de criar fatores de comparação com dados que passarão a ser gerados a partir da mesma imagem obtida pela tomografia. OBJETIVOS: para isso, propusemo-nos a avaliar o ângulo formado entre o longo eixo do incisivo inferior e o plano mandibular, a grandeza IMPA da cefalometria, na telerradiografia convencional e na tomografia computadorizada. MÉTODOS: dezenove pacientes selecionados para tratamento ortodôntico constituíram a amostra deste estudo, 12 do gênero feminino e 7 do masculino, com idades entre 16 anos e 4 meses e 28 anos e 2 meses. Após a coleta de dados, feita por dois examinadores, análises estatísticas para a obtenção dos erros intra e inter-examinadores foram feitas, utilizando nível de significância de 5%. RESULTADOS E CONCLUSÕES: concluiu-se que a obtenção dos valores para o ângulo formado entre o longo eixo do incisivo inferior e o plano mandibular (IMPA na telerradiografia lateral é um método confiável para uso clínico, porque embora apresente, como regra, valores menores que os encontrados em tomografia

  17. Paracoccidioidomicose pulmonar: aspectos na tomografia computadorizada de alta resolução High-resolution computed tomography findings in pulmonary paracoccidioidomycosis

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    Maria Angélica Soares Muniz

    2002-06-01

    Full Text Available O comprometimento pulmonar na paracoccidioidomicose é muito freqüente, podendo até ser a única manifestação da doença. Neste trabalho são analisados os aspectos encontrados nas tomografias computadorizadas de alta resolução do tórax de 30 pacientes com paracoccidioidomicose confirmada. Por meio desta análise foram determinados os achados mais comuns e suas formas de apresentação e distribuição nos pulmões. Os aspectos mais freqüentemente observados foram: espessamento esparso de septos interlobulares (96,7%, opacidades em vidro fosco (66,7%, nódulos (60%, aumento irregular do espaço aéreo (enfisema paracicatricial (56,7%, espessamento de paredes brônquicas (46,7%, espessamento pleural (36,7%, cavidades (36,7%, dilatação da traquéia (33,3%, distorção arquitetural (30%, consolidação do espaço aéreo (30%, bandas parenquimatosas (23,3%, reticulado intralobular (13,3% e espessamento irregular do interstício axial peri-hilar (10%. A radiografia do tórax apresenta limitada capacidade de avaliar doenças pulmonares difusas, tornando a tomografia computadorizada de alta resolução do tórax essencial para avaliação dos pacientes com paracoccidioidomicose pulmonar.Pulmonary disease in paracoccidioidomycosis is very common and in some cases can be the sole manifestation of the disease. We studied the findings observed in 30 patients with pulmonary paracoccidioidomycosis submitted to high-resolution computed tomography in order to determine the most frequent findings, presentation patterns and distribution of paracoccidioidomycosis lesions in the lungs. The most frequent findings observed on high-resolution computed tomography were: interlobular septal thickening (96.7%, ground-glass opacities (66.7%, nodules (60%, irregular air-space enlargement (56.7%, bronchial wall thickening (46.7%, pleural thickening (36.7%, cavitation (36.7%, tracheal dilatation (33.3%, architectural distortion (30%, air-space consolidation (30

  18. Esclerose sistêmica progressiva: aspectos na tomografia computadorizada de alta resolução Progressive systemic sclerosis: high-resolution computed tomography findings

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    Emerson L. Gasparetto

    2005-09-01

    Full Text Available OBJETIVO: Descrever os achados de tomografia computadorizada de alta resolução de pacientes com esclerose sistêmica pulmonar, independentemente dos sintomas respiratórios. MATERIAIS E MÉTODOS: Foram revisados 73 exames de tomografia computadorizada de alta resolução de 44 pacientes com diagnóstico de esclerodermia estabelecido através de critérios clínicos e laboratoriais. Os exames foram revisados por dois radiologistas, que estabeleceram os achados por consenso. RESULTADOS: Em 91,8% (n = 67 dos exames observaram-se alterações. Os principais achados foram lesões de padrão reticular (90,4%, opacidades em vidro-fosco (63%, bronquiectasias e bronquiolectasias de tração (56,2%, dilatação esofagiana (46,6%, faveolamento (28,8% e sinais de hipertensão pulmonar (15,6%. Na maioria dos casos as lesões eram bilaterais (89% e simétricas (58,5%. Quanto à localização, houve predomínio de lesões basais (91,2% e periféricas (92,2%. CONCLUSÃO: A esclerose sistêmica progressiva acarreta fibrose pulmonar na maioria dos pacientes, caracterizada principalmente por lesão reticular basal e periférica.OBJECTIVE: To describe the high-resolution computed tomography findings in the lung of patients with systemic sclerosis, independently of the respiratory symptoms. MATERIALS AND METHODS: Seventy-three high-resolution computed tomography scans of 44 patients with clinical diagnosis of systemic sclerosis were reviewed and defined by the consensus of two radiologists. RESULTS: Abnormalities were seen in 91.8% (n = 67 of the scans. The most frequent findings were reticular pattern (90.4%, ground-glass opacities (63%, traction bronchiectasis and bronchiolectasis (56.2%, esophageal dilatation (46.6%, honeycombing pattern (28.8% and signs of pulmonary hypertension (15.6%. In most cases the lesions were bilateral (89% and symmetrical (58.5%. The lesions were predominantly located in the basal (91.2% and peripheral (92.2% regions. CONCLUSION: In

  19. Mudanças na estrutura do solo avaliada com uso de tomografia computadorizada Soil structure changes evaluated with computed tomography

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    Luiz Fernando Pires

    2010-04-01

    Full Text Available O objetivo deste trabalho foi avaliar, em escala milimétrica, a modificação da densidade e da porosidade de amostras deformadas de solo submetidas a ciclos de umedecimento e secamento (U-S, por meio da tomografia computadorizada de raios gama. Amostras com 98,1 cm³ foram preparadas procedendo ao peneiramento do solo em malha de 2 mm e acondicionamento de forma homogênea em tubos de PVC. As amostras de solo foram submetidas a um, dois e três ciclos de U-S. As amostras controle não foram submetidas a nenhum ciclo de U-S. Após a aplicação dos ciclos de U-S, a porosidade das amostras diminuiu e as camadas de solo se adensaram. Os dados de tomografia computadorizada permitiram análise contínua da densidade do solo e de sua porosidade, em camadas milimétricas (0,08 cm, o que não pode ser alcançado facilmente por métodos tradicionais usados em física do solo.The objective of this work was to evaluate in millimetric scale changes in soil bulk density and porosity, using the gamma-ray computed tomography in soil samples with disturbed structure due to wetting and drying (W-D cycles. Soil samples with 98.1 cm³ were sieved using a 2 mm mesh and homogenously packed in PVC cylinders. Soil samples were submitted to 1, 2, and 3 W-D cycles. Control samples were not submitted to W-D cycles. After repetitions of W-D cycles, soil sample porosity decreased and soil layers became denser. Computed tomography allowed a continuous analysis of soil bulk density and also soil porosity along millimetric (0.08 cm layers, what cannot be provided by traditional methods used in soil physics.

  20. Tomografia computadorizada em pacientes portadores de neurocisticercose com hipertensão intracraniana por hidrocefalia obstrutiva: comparação com ventriculografia com Dimer-X

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    Benedicto Oscar Colli

    1984-06-01

    Full Text Available Estudo das alterações observadas nas tomografias computadorizadas (TCs de 16 casos de neurocisticercose, com hipertensão intracraniana por hidrocefalia. Todos os casos foram submetidos a radiografias simples do crânio e 12, à ventriculografia com Dimer-X. Nas radiografias simples foram observados sinais de hipertensão intracraniana em 7, calcificações em um, e d foram normais. A TC mostrou parênquima cerebral normal em 9 casos e nos 7 restantes áreas hipodensas arredondadas de tamanho variado, com ou sem retenção de contraste na periferia, e/ou calcificações esparsas no parenquima. Hidrocefalia foi a única alteração observada no sistema ventricular nos casos em que o exame foi realizado previamente à derivação do LCR. As ventriculografias foram analisadas em trabalho anterior e permitiram localizar e determinar as características da obstrução e a presença de massas ocupando espaço dentro dos ventrículos. A comparação das ventriculografias e TCs realizadas na mesma época evidenciou que a primeira fornece melhores informações sobre o sistema ventricular mas, por outro lado, a tomografia fornece informações adicionais sobre o parênquima cerebral. A TC e a ventriculografia são exames que se completam na avaliação e no diagnóstico destes pacientes.

  1. Achados de imagem da revascularização do miocárdio pela tomografia computadorizada por múltiplos detectores: onde estão os enxertos? Ensaio iconográfico

    OpenAIRE

    Ripari,Marcelo Targa; Santaniello,Rogério; Sasdelli Neto,Roberto; Nomura, César Higa; Chate, Rodrigo Caruso; Passos, Rodrigo Bastos Duarte; Kay, Fernando Uliana; Funari, Marcelo Buarque de Gusmão

    2009-01-01

    A angiotomografia por multidetectores de coronárias constitui um método preciso para avaliação dos enxertos venosos e arteriais pós-revascularização coronariana e vem substituindo em parte o cateterismo, o qual é um método invasivo e de maior custo. Este ensaio iconográfico tem como objetivo a demonstração anatômica dos enxertos mais comumente utilizados, como diferenciar enxertos venosos e arteriais e como localizá-los. Os exames foram realizados em aparelhos de tomografia computadorizada mu...

  2. Avaliação da posição condilar em pacientes com DTM antes e após terapia com placa interoclusal estabilizadora por meio de tomografia computadorizada de feixes cônicos

    OpenAIRE

    2014-01-01

    O objetivo deste estudo foi avaliar a posição condilar em pacientes com DTM articular antes e após tratamento com placa interoclusal estabilizadora por meio de tomografia computadorizada de feixes cônicos. Foram avaliados e tratados 22 pacientes com algum sinal ou sintoma de DTM articular, triados nas Clínicas do Curso de Odontologia da Universidade Estadual de Montes Claros, que preencheram os critérios de inclusão e exclusão. O diagnóstico de DTM foi realizado com o Research Diagnostic Crit...

  3. Localização dos sulcos e giros da face súpero-lateral do cérebro na tomografia computadorizada e na ressonância magnética

    OpenAIRE

    Gusmão Sebastião; Ribas Guilherme Carvalhal; Silveira Roberto Leal; Tazinaffo Uedsom

    2001-01-01

    O conhecimento da anatomia da face súpero-lateral do cérebro é fundamental para localizar e abordar as lesões cerebrais. Faz-se a revisão da literatura dos sinais e referências para identificar os sulcos e giros da face súpero-lateral do cérebro na tomografia computadorizada e na ressonância magnética. O uso conjunto dos vários sinais possibilita a identificação dos sulcos e giros e a localização das lesões cerebrais na quase totalidade dos casos.

  4. Localização dos sulcos e giros da face súpero-lateral do cérebro na tomografia computadorizada e na ressonância magnética

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    Gusmão Sebastião

    2001-01-01

    Full Text Available O conhecimento da anatomia da face súpero-lateral do cérebro é fundamental para localizar e abordar as lesões cerebrais. Faz-se a revisão da literatura dos sinais e referências para identificar os sulcos e giros da face súpero-lateral do cérebro na tomografia computadorizada e na ressonância magnética. O uso conjunto dos vários sinais possibilita a identificação dos sulcos e giros e a localização das lesões cerebrais na quase totalidade dos casos.

  5. Propedêutica radiológica do impacto femoroacetabular em tempos de tomografia computadorizada e ressonância magnética: o que o radiologista precisa saber

    OpenAIRE

    Rafael Borges Nunes; Denise Tokechi Amaral; Valesca Sarkis de Oliveira

    2011-01-01

    Após breve descrição dos tipos de impacto femoroacetabular, este trabalho demonstra o protocolo de radiologia convencional, tomografia computadorizada e ressonância magnética para os casos de impacto, desenvolvido nos últimos oito anos em parceria com serviços de referência em ortopedia. Demonstra-se a propedêutica radiológica básica de cada método, revisando os aspectos mais relevantes na avaliação do quadril.

  6. Avaliação das alterações transversais imediatas à expansão maxilar com o aparelho quadrihélice por meio de tomografia computadorizada do feixe cônico

    OpenAIRE

    Zasso, Manuela Batistella

    2013-01-01

    Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências da Saúde, Programa de Pós-Graduação em Odontologia, Florianópolis, 2013. O objetivo deste estudo clínico prospectivo foi avaliar as alterações esqueléticas transversais imediatas à expansão maxilar lenta (EML) utilizando o aparelho quadrihélice em pacientes com dentição mista através de tomografia computadorizada do feixe cônico (TCFC). Métodos: A amostra consistiu de 27 pacientes com idades entre 7 a 10 an...

  7. Comportamento da sutura palatina mediana em crianças submetidas à expansão rápida da maxila: avaliação mediante imagem de tomografia computadorizada Behavior of the midpalatal suture in children submitted to rapid maxillary expansion: evaluation with computerized tomography

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    Omar Gabriel da Silva Filho

    2007-06-01

    Full Text Available OBJETIVO: o presente estudo, de caráter prospectivo, objetivou avaliar a imagem da sutura palatina mediana em crianças submetidas à expansão rápida da maxila por meio de tomografia computadorizada, após a fase de contenção. METODOLOGIA: a amostra constou de 17 crianças de ambos os gêneros, na faixa etária compreendida entre 5 anos e 2 meses e 10 anos e 5 meses no início do tratamento, provenientes da Clínica de Ortodontia Interceptiva da Sociedade de Promoção Social do Fissurado Lábio-Palatal da Universidade de São Paulo (PROFIS-USP, Bauru/SP. Tomografias computadorizadas foram implementadas para avaliar o comportamento da sutura palatina mediana em diferentes momentos do tratamento. RESULTADOS E CONCLUSÕES: constatou-se que, após um período médio de 8 a 9 meses de contenção com o aparelho expansor, a sutura palatina mediana mostrou-se completamente ossificada, desde a região da espinha nasal anterior até a espinha nasal posterior. Tal informação esclarece o comportamento da sutura palatina mediana frente à expansão rápida da maxila e reitera o senso comum quanto ao caráter biológico do procedimento.AIM: The aim of this prospective study was to evaluate the midpalatal suture in children submitted to rapid palatal expansion with computerized tomography. METHODS: The sample was comprised of 17 children aged between 5 years and 2 months and 10 years and 5 months, that were submited to rapid palatal expansion. The radiologic aspect of the sutures were evaluated through computerized tomography. RESULS AND CONCLUSIONS: The tomographic images showed that, after the retention phase (8 to 9 months post-expansion, the midpalatal suture was completely ossified from the anterior to the posterior nasal spine region.

  8. Edema pulmonar hidrostático: aspectos na tomografia computadorizada de alta resolução Hydrostatic pulmonary edema: high-resolution computed tomography aspects

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    Cláudia Maria Cunha Ribeiro

    2006-12-01

    Full Text Available OBJETIVO: A proposta deste estudo foi caracterizar por meio de tomografia computadorizada de alta resolução do tórax as principais alterações pulmonares do edema pulmonar hidrostático. MÉTODOS: Foram analisadas, retrospectivamente, as tomografias de quinze pacientes com quadro clínico de edema pulmonar hidrostático, divididos em cinco principais grupos etiológicos: insuficiência cardíaca congestiva, valvulopatia mitral aguda, infarto agudo do miocárdio, miocardite e mediastinite fibrosante, tendo sido sete pacientes classificados no primeiro grupo e dois em cada um dos demais. RESULTADOS: Os principais achados do edema hidrostático foram opacidades em vidro fosco (100%, espessamento dos septos interlobulares (100%, derrame pleural (87% e espessamento do interstício peribroncovascular (80%. Outros achados menos comuns foram aumento do calibre dos vasos, consolidações e nódulos do espaço aéreo. CONCLUSÃO: O padrão predominante encontrado nos pacientes estudados foi o de opacidades em vidro fosco associadas a espessamento dos septos interlobulares (padrão de pavimentação em mosaico, com derrame pleural bilateral, predominante à direita.OBJECTIVE: This study aimed to use high-resolution computed tomography scans of the chest to characterize the principal alterations occurring in cases of hydrostatic pulmonary edema. METHODS: A retrospective analysis was made of the tomography scans of 15 patients presenting clinical profiles of hydrostatic pulmonary edema. The cases were divided into five groups by etiology: congestive heart failure (n = 7; acute mitral valve disease (n = 2; acute myocardial infarction (n = 2; myocarditis (n = 2; and fibrosing mediastinitis (n = 2. RESULTS: The principal findings in the cases of hydrostatic pulmonary edema were ground-glass opacities (in 100%, interlobular septal thickening (in 100%, pleural effusion (in 87% and peribronchovascular interstitial thickening (in 80%. Other, less common

  9. O valor da fase sem contraste na tomografia computadorizada do abdome The role of the unenhanced phase in the routine abdominal computed tomography

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    Ana Paula Klautau Leite

    2008-10-01

    Full Text Available OBJETIVO: Determinar o valor agregado da fase sem meio de contraste da tomografia computadorizada do abdome em pacientes sem diagnóstico determinado ou em estadiamento tumoral. MATERIAIS E MÉTODOS: Estudo prospectivo e transversal em 100 pacientes consecutivos submetidos a tomografia computadorizada abdominal sem e com meio de contraste intravenoso. Dois examinadores avaliaram todos os exames, procurando estabelecer, através da fase com meio de contraste intravenoso (primeira análise e posteriormente através da fase sem contraste (segunda análise, o diagnóstico principal e os secundários em função da indicação clínica do exame. Mediu-se a freqüência de mudança diagnóstica decorrente da análise combinada das fases pré- e pós-contraste intravenoso. Casos que tiveram mudança diagnóstica foram avaliados por especialistas clínicos para determinar se implicaria mudanças de conduta. RESULTADOS: Diagnósticos principal e secundário foram modificados em 1 e 18 casos, respectivamente (p = 1,000; p = 0,143. Os diagnósticos modificados foram: esteatose, definição de nódulo em adrenal, nefrolitíase, classificação de cistos renais e calcificação hepática. Nos casos em que a fase sem contraste modificou o diagnóstico, os especialistas mudaram sua conduta em 14/19 (73% dos pacientes (p = 0,038. CONCLUSÃO: A fase sem contraste não modificou significativamente o diagnóstico principal ou secundário. Porém, as mudanças nos diagnósticos secundários influenciaram na conduta adotada pelos especialistas.OBJECTIVE: To determine the role of the unenhanced phase of abdominal computed tomography in patients without a definite diagnosis or undergoing tumor staging. MATERIALS AND METHODS: A prospective and transversal study was developed with 100 consecutive patients submitted to unenhanced and contrast-enhanced abdominal computed tomography. Two observers evaluated all the computed tomography images in the contrast-enhanced phase

  10. Quantitative analyses of maxillary sinus using computed tomography Análise quantitativa dos seios maxilares por meio da tomografia computadorizada

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    Andréia Perella

    2003-09-01

    Full Text Available The aim of this study was to evaluate the precision and accuracy of linear measurements of maxillary sinus made in tomographic films, by comparing with 3D reconstructed images. Linear measurements of both maxillary sinus in computed tomography CT of 17 patients, with or without lesion by two calibrated examiners independently, on two occasions, with a single manual caliper. A third examiner has done the same measurements electronically in 3D-CT reconstruction. The statistical analysis was performed using ANOVA (analyses of variance. Intra-observer percentage error was little in both cases, with and without lesion; it ranged from 1.14% to 1.82%. The inter-observer error was a little higher reaching a 2.08% value. The accuracy presented a higher value. The perceptual accuracy error was higher in samples, which had lesion compared to that which had not. CT had provided adequate precision and accuracy for maxillary sinus analyses. The precision in cases with lesion was considered inferior when compared to that without lesion, but it can't affect the method efficacy.O objetivo deste trabalho foi avaliar a precisão e acurácia de medidas lineares da região de seio maxilar realizadas em filmes tomográficos, por meio de comparação com a reconstrução da imagem em 3D. Medidas lineares de ambos os seios maxilares foram realizadas em tomografias computadorizadas (2D-TC de 17 pacientes, normais e com lesão, por dois examinadores, calibrados, separadamente, duas vezes cada um, utilizando um compasso. Um terceiro observador realizou as mesmas medidas eletronicamente na reconstrução 3D-TC. ANOVA (análise de variância foi utilizado para análise estatística. A porcentagem de erro intra-examinadores foi pequena em ambos os casos, com ou sem lesão, variando de 1,14% a 1,82%. O erro inter-examinadores foi maior alcançando o valor de 2,08% .O erro percentual de acurácia nas amostras com lesão foram maiores comparando-as às que não tinham lesão. A

  11. Computed tomography assessment of Apert syndrome Avaliação da síndrome de Apert por meio da tomografia computadorizada

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    Marco Antônio Portela Albuquerque

    2004-03-01

    ãos e pés. O presente trabalho tem por objetivo o estudo de pacientes portadores da síndrome de Apert, não-operados, correlacionando os achados clínicos com os obtidos por meio da tomografia computadorizada (TC. Foram analisados 5 pacientes, sendo todos submetidos ao exame clínico e à tomografia computadorizada. Reconstruções tridimensionais (3D-TC foram obtidas a partir de um tomógrafo helicoidal, utilizando uma estação de trabalho independente, para avaliação das alterações craniofaciais provocadas pela síndrome. A análise clínica determinou que sindactilia de mãos e pés, pseudofenda na linha média do palato e hipoplasia da maxila são achados observados em todos os pacientes. A 3D-TC mostrou que algumas alterações como sinostose bilateral das suturas coronais, defeito na linha média da calvária e redução na dimensão ântero-posterior da fossa craniana anterior, média e posterior estavam presentes em todos os casos. A combinação e correlação entre os achados clínicos e os observados na 3D-TC pode ser útil na avaliação das alterações observadas na síndrome de Apert, possibilitando melhora no estudo do paciente e promovendo informações importantes no diagnóstico, planejamento terapêutico e acompanhamento cirúrgico.

  12. Aspectos da tomografia computadorizada no linfoma em pacientes abaixo de 20 anos de idade Computed tomography findings in patients less than 20 years old with lymphoma

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    Adriana Moreira Viana Borba

    2007-04-01

    Full Text Available OBJETIVO: Descrever os achados gerais do linfoma em pacientes abaixo de 20 anos de idade e por subtipo histológico. MATERIAIS E MÉTODOS: Estudo retrospectivo do arquivo digital de tomografia computadorizada do Centro de Controle do Câncer do Hospital Universitário Pedro Ernesto da Universidade do Estado do Rio de Janeiro, no período de março de 2003 a julho de 2005. Dos 22 casos - 16 do sexo masculino e 6 do sexo feminino, com média de idade de 11,5 anos -, 12 eram do subtipo Hodgkin e 10 eram não-Hodgkin. RESULTADOS: Dos achados gerais, verificamos as linfonodomegalias mediastinais como o mais freqüente (59%, com predomínio no grupo Hodgkin (75%, seguido por hepatoesplenomegalia (50% e linfonodomegalias cervicais e retroperitoneais (27,3%. No subtipo Hodgkin houve predomínio do acometimento linfonodal, em sucessivas cadeias, seguido pela hepatoesplenomegalia (50%. Verificamos um caso de massa tonsilar unilateral, opacidade pulmonar em "vidro-fosco" e nódulos renais. No subtipo não-Hodgkin houve predomínio extranodal caracterizado por hepatoesplenomegalia (50%, espessamento de alça intestinal (40%, derrame pleural (30%, nódulo pulmonar (20%, ascite (10%, derrame pericárdico (10% e lesões ósseas mistas (10%. CONCLUSÃO: A tomografia computadorizada é de grande valia no diagnóstico, estadiamento e seguimento do linfoma, com achados de alerta como massa linfonodal, notadamente mediastinal, hepatoesplenomegalia, massa unilateral na tonsila e espessamento parietal de alça intestinal.OBJECTIVE: To describe the general findings of lymphoma and their histological patterns in patients less than 20 years old. MATERIALS AND METHODS: Twenty-two cases (16 male and 6 female, mean age 11.5 years from the digital archive of computed tomography at the Cancer Control Center of "Hospital Universitário Pedro Ernesto - Universidade do Estado do Rio de Janeiro", Rio de Janeiro, RJ, Brazil, were retrospectively analyzed in the period between

  13. Lesões traumáticas do parênquima pulmonar: aspectos na tomografia computadorizada Traumatic lung lesions: computed tomography findings

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    Alessandro Severo Alves de Melo

    2003-06-01

    Full Text Available As lesões pulmonares são achados freqüentes no trauma torácico, sendo cada vez mais diagnosticadas pela tomografia computadorizada, em especial pelo rápido tempo de aquisição decorrente da técnica helicoidal, que permite a avaliação de pacientes em estado grave, possibilitando a adoção de conduta terapêutica eficiente. Os autores estudaram 150 pacientes vítimas de trauma torácico submetidos a tomografia computadorizada, que apresentaram lesões pulmonares, representadas por contusões, atelectasias, lacerações e hematomas pulmonares. As contusões pulmonares se caracterizaram por consolidações e atenuação em vidro fosco, sendo as lesões pulmonares mais comuns. As atelectasias foram observadas com os padrões subsegmentar e compressiva, e foram a segunda lesão mais comum. As lacerações se apresentaram como consolidações com ar ou nível líquido no interior. Os hematomas pulmonares representaram a lesão pulmonar mais rara, presentes em apenas cinco casos, caracterizados por opacidades arredondadas. Neste trabalho o trauma torácico fechado predominou, com 120 casos, enquanto o trauma aberto ocorreu em 30 casos. As causas de trauma fechado, em ordem decrescente de freqüência, foram: colisão automobilística, atropelamento, queda de altura, acidente de motocicleta e espancamento. A forma penetrante de traumatismo torácico decorreu de duas causas de agressão: lesão por arma de fogo e lesão por arma branca.Traumatic lesions of the lung are common findings in patients with thoracic trauma. These lesions are increasingly diagnosed using computed tomography, mostly due to the fast acquisition time helical techniques that allow evaluation of critically ill patients and an efficient therapeutic management. The authors studied 150 patients with thoracic trauma submitted to computed tomography that demonstrated lung contusions, atelectasies, lacerations and hematomas. Lung contusions were the most frequent lesions

  14. Características da demanda por tomografia computadorizada crânio-encefálica motivos e custos dos exames

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    Ana Tereza Ramos de Oliveira

    1992-03-01

    Full Text Available Foram levantadas as 2860 tomografias computadorizadas crânio-encefálicas (TCCE feitas em um dos três serviços da cidade do Salvador, Brasil, sendo: caracterizados o perfil do usuário e a procedência da demanda; analisados os motivos dos exames e os custos com TCCE normais e anormais. Foram constatadas frequências altas de exames normais: (a para o sexo feminino (66,0% e até os 54 anos (73,0%, neste sexo (variação de exames normais entre 65 e 80%; (b para o sexo masculino nos grupos <15, 25-34 e 35-44 anos (64,7%; (c para solicitações efetuadas pelos convênios (65,3%; (d pelos seguintes motivos, para homens e mulheres respectivamente: cefaléias (81,3 e 87,5%; desmaios/tonturas (79,3 e 78,6%; convulsões (67,3 e 70%; retardo do desenvolvimento psicomotor (72,0 e 67,7%; «distúrbios endócrinos» (75,0% em cada sexo. Proporções altas de exames anormais foram observadas pelos seguintes motivos e para homens e mulheres, respectivamente: síndrome demencial (91,7 e 83,3%; acidentes vasculares encefálicos (85,1 e 73,7%; doenças infecciosas (76,5 e 78,6%; suspeitas de tumor (65,8 e 55,4%; e traumatismo crâ-nioencefálico, 63,6% no sexo masculino. No total, os custos com as TCC normais corresponderam a US$ 565,255 e com as anormais, US$ 381,247; para os convênios, os custos com TCC normais foram 2,2 vezes superiores ao INAMPS e 2,8 vezes superiores àqueles da medicina privada.

  15. Trauma dos ossos temporais e suas complicações: aspectos na tomografia computadorizada Temporal bone trauma and complications: computed tomography findings

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    Ana Maria Doffémond Costa

    2013-04-01

    Full Text Available A maioria das fraturas dos ossos temporais resulta de traumas cranianos bruscos, de alta energia, estando muitas vezes relacionadas a outras fraturas cranianas ou a politraumatismo. As fraturas e os deslocamentos da cadeia ossicular, na orelha média, representam umas das principais complicações das injúrias nos ossos temporais e, por isso, serão abordadas de maneira mais profunda neste artigo. Os outros tipos de injúrias englobam as fraturas labirínticas, fístula dural, paralisia facial e extensão da linha de fratura ao canal carotídeo. A tomografia computadorizada tem papel fundamental na avaliação inicial dos pacientes politraumatizados, pois é capaz de identificar injúrias em importantes estruturas que podem causar graves complicações, como perda auditiva de condução ou neurossensorial, tonturas e disfunções do equilíbrio, fístulas perilinfáticas, paralisia do nervo facial, lesões vasculares, entre outras.Most temporal bone fractures result from high-energy blunt head trauma, and are frequently related to other skull fractures or to polytrauma. Fractures and displacements of ossicular chain in the middle ear represent some of the main complications of temporal bone injury, and hence they will be more deeply approached in the present article. Other types of injuries include labyrinthine fractures, dural fistula, facial nerve paralysis and extension into the carotid canal. Computed tomography plays a fundamental role in the initial evaluation of polytrauma patients, as it can help to identify important structural injuries that may lead to severe complications such as sensorineural hearing loss, conductive hearing loss, dizziness and balance dysfunction, perilymphatic fistulas, facial nerve paralysis, vascular injury and others.

  16. O uso de tomografia computadorizada nas internações por Acidente Vascular Cerebral no Sistema Único de Saúde no Brasil Computerized tomography utilization for stroke inpatients in the Brazilian Health System

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    Cristina Lúcia Rocha Cubas Rolim

    2012-03-01

    Full Text Available O Acidente Vascular Cerebral é um dos principais motivos de internação no Sistema Único de Saúde. O exame de tomografia computadoriza tem sido indicado como o principal método diagnóstico de imagem para a definição do tratamento do Acidente Vascular Cerebral. O objetivo desse artigo é avaliar a utilização de exames de tomografia computadorizada em internações por Acidente Vascular Cerebral com base nas informações do Sistema de Informação Hospitalar do Sistema Único de Saúde. O universo de estudo incluiu as internações de pacientes adultos ocorridas no Brasil e financiadas pelo Sistema Único de Saúde entre abril de 2006 e dezembro de 2007. A análise dos dados foi descritiva para o conjunto de casos de Acidente Vascular Cerebral e para cada subgrupo separadamente. Das 328.087 internações por Acidente Vascular Cerebral, observou-se que em 73,5% o exame não foi realizado. Nas internações que realizaram tomografia computadorizada, 22,3% tiveram acesso a um exame e somente 4,2% a dois exames. Além de subutilizado, o exame de tomografia computadorizada, quando realizado, não trouxe melhora na codificação adequada do subgrupo da doença.Stroke is a leading reason for hospitalization in the Brazilian Health System. Computerized tomography has been indicated as the main diagnostic method to define stroke treatment. The aim of this paper was to evaluate the utilization of computerized tomography in hospitalizations due to stroke. The source of data was the Brazilian hospital information system. The study population comprised adult stroke inpatients in Brazil in the Brazilian Health System, between April 2006 and December 2007. Data analysis was descriptive for stroke and for each separate subgroup. Of the 328,087 stroke inpatients, 73.5% had not done a computerized tomography scan. Among hospitalizations that underwent a computed tomography scan, 22.3% had access to one test, and only 4.2% had two tests. Besides underuse

  17. Fístula coronariana para ventrículo esquerdo: diagnóstico por tomografia computadorizada

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    Roberto Moreno Mendonça

    2011-10-01

    Full Text Available Fístulas de artérias coronárias são raras, sendo diagnosticadas mais frequentemente pelo ecocardiograma ou pela cineangiocoronariografia, entretanto, a angiotomografia computadorizada (angio-TC das coronárias ganha espaço. Essa patologia apresenta incidência baixíssima, sendo as fístulas originadas da coronária direita mais frequentes. Fístulas coronarianas para câmaras cardíacas direitas são mais incidentes, sendo raras para o ventrículo esquerdo (VE. O tratamento pode ser cirúrgico ou percutâneo. Este relato descreve caso de fístula coronariana para VE diagnosticada pela angio-TC das coronárias em homem de 46 anos, hipertenso, assintomático com teste ergométrico positivo para isquemia. Angio-TC de coronárias descartou doença obstrutiva, porém revelou fístula coronariana conectando-se com cavidade ventricular esquerda.

  18. Carcinoma espinocelular do conduto auditivo externo: estudo por tomografia computadorizada de seis casos Squamous cell carcinoma of the external auditory canal: computed tomography findings in six cases

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    Fábio Mota Gonzalez

    2005-06-01

    Full Text Available OBJETIVO: Analisar a importância da avaliação tomográfica da extensão profunda dos carcinomas espinocelulares do conduto auditivo externo. MATERIAIS E MÉTODOS: Foram realizados exames tomográficos com cortes axiais e coronais com janelas para partes moles e óssea em seis pacientes com carcinoma espinocelular do conduto auditivo externo, com idade variando entre 55 e 71 anos, internados no Hospital Heliópolis, no período entre maio de 1995 e dezembro de 2003. RESULTADOS: Dos seis pacientes, todos apresentavam aumento de partes moles no conduto auditivo externo, cinco (83,3% tinham erosão óssea e invasão da orelha média, quatro (66,7% possuíam comprometimento da mastóide e da glândula parótida, três (50% apresentavam invasão da articulação temporomandibular, dois (33,3% tinham invasão da fossa média, do canal carotídeo e linfonodomegalia júgulo-carotídea alta ipisilateral. CONCLUSÃO: A avaliação da extensão tumoral profunda fornecida pela tomografia computadorizada é importante no estadiamento clínico, possibilitando um planejamento terapêutico mais eficaz.OBJECTIVE: To evaluate the role of computed tomography in the assessment of deep extension of squamous cell carcinoma of the external auditory canal. MATERIALS AND METHODS: In the period between May 1995 and December 2003 six patients with squamous cell carcinoma of the external auditory canal were submitted to computed tomography scan at "Hospital Heliópolis", São Paulo, SP, Brazil, including axial and coronal slices with soft tissue and bone algorithms. RESULTS: Thickening of the soft tissue of the external auditory canal was seen in all patients, bone erosion and invasion of the middle ear in five (83.3%, invasion of the mastoid and parotid gland in four (66.7%, invasion of the temporomandibular joint in three (50%, and invasion of the middle cranial fossa, carotid canal and cervical lymph node enlargement in two (33.3% patients. CONCLUSION: Assessment of

  19. CARCINOMA BRONQUÍOLO-ALVEOLAR: ASPECTOS NA TOMOGRAFIA COMPUTADORIZADA DE ALTA RESOLUÇÃO Bronchioloalveolar carcinoma: aspects in high-resolution computed tomography

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    Luiza Beatriz Melo Moreira

    2002-01-01

    Full Text Available O carcinoma bronquíolo-alveolar é um tipo de carcinoma broncogênico de crescimento insidioso, que surge nas paredes das vias aéreas distais e se dissemina utilizando o septo alveolar como um estroma, preservando a arquitetura pulmonar. Neste trabalho foram analisadas as tomografias computadorizadas de alta resolução de 17 pacientes com carcinoma bronquíolo-alveolar. Ao contrário do relatado na literatura, foram observados predomínio no sexo masculino (71% e maior freqüência da associação das formas de consolidação e multinodular (53% em relação à forma nodular solitária (12%, multinodular (12% e de consolidação (23%. Os aspectos mais encontrados foram: áreas de consolidação (76%, broncograma aéreo (71%, áreas de baixa atenuação provavelmente devidas à presença de muco (60%, espessamento de septos interlobulares, opacidades em vidro fosco e nódulos confluentes (54% cada, e pavimentação em mosaico (36%. Os nódulos cavitados, a atelectasia, o sinal do halo e o aspecto de "árvore em brotamento" foram observados em apenas um caso cada.Bronchioloalveolar carcinoma is a bronchogenic carcinoma that presents an insidious growth, arises from the walls of the distal air spaces and spreads using the alveolar septa as a stroma, preserving the lung architecture. In this work we analyze the high-resolution computed tomography of 17 patients with bronchioloalveolar carcinoma. Conversely to the data presented in the literature, male preponderance (71% and a higher frequency of association between multinodular and consolidation patterns (53% in comparison to single nodular (12%, multinodular (12% and consolidation (23% patterns were observed. The most common findings were: consolidation areas (76%, air bronchogram (71%, low attenuation areas (60%, thickening of interlobular septa, ground-glass attenuation and confluent nodules (54% each, and crazy paving pattern (36%. Cavitated nodules, atelectasis, halo sign and "tree in bud

  20. A tomografia computadorizada de alta resolução na avaliação da toxicidade pulmonar por amiodarona High-resolution computed tomography of amiodarone pulmonary toxicity

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    Daniela Peixoto Consídera

    2006-04-01

    Full Text Available OBJETIVO: Avaliar as principais alterações identificadas na tomografia computadorizada de alta resolução do tórax em pacientes com toxicidade pulmonar pela amiodarona. MATERIAIS E MÉTODOS: Foram avaliadas dez tomografias computadorizadas de alta resolução de tórax de pacientes com pneumonite pela amiodarona, seis desses pacientes do sexo masculino e quatro do sexo feminino, com idade média de 73,5 anos. RESULTADOS: Os achados tomográficos mais relevantes foram opacidades lineares ou reticulares em seis casos (60%, pequenos nódulos com densidade elevada em seis casos (60%, consolidações densas em três casos (30% e aumento da densidade do parênquima hepático em cinco de oito casos em que havia estudo tomográfico do abdome superior (62,5%. CONCLUSÃO: A tomografia computadorizada de alta resolução é um exame importante na avaliação de pacientes com toxicidade pulmonar pela amiodarona, devendo ser realizada sempre que houver suspeita deste diagnóstico. O achado de espessamento de septos interlobulares associado a lesões com aumento de densidade é altamente sugestivo deste diagnóstico.OBJECTIVE: To evaluate the main findings of chest high-resolution computed tomography in patients with amiodarone pulmonary toxicity. MATERIALS AND METHODS: Ten patients - six male and four female, average age of 73.5 years - with amiodarone-induced pneumonitis have undergone chest high-resolution computed tomography. RESULTS: The most relevant tomographic findings were linear or reticular opacities in six cases (60%, small high density nodules in six cases (60%, dense consolidations in three cases (30% and increased density in the hepatic parenchyma in five of eight cases in which there was a superior abdomen CT scan (62.5%. CONCLUSION: The high-resolution computed tomography is a valuable non-invasive test for evaluating patients with amiodarone pulmonary toxicity and should always be performed when one suspects of the presence of this

  1. Tomografia computadorizada na avaliação da aspergilose pulmonar angioinvasiva em pacientes com leucemia aguda Computed tomography in the assessment of angioinvasive pulmonary aspergillosis in patients with acute leukemia

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    Renata Carneiro Leão

    2006-10-01

    Full Text Available OBJETIVO: O objetivo deste trabalho foi avaliar os principais achados na tomografia computadorizada de pacientes portadores de leucemia aguda complicada com aspergilose pulmonar angioinvasiva. MATERIAIS E MÉTODOS: Foram estudadas, retrospectivamente, as tomografias computadorizadas de 19 pacientes, avaliando-se a presença de consolidações, nódulos e massas, com ou sem sinal do halo, escavação e sinal do crescente aéreo. RESULTADOS: Áreas de consolidação foram o achado mais comum, ocorrendo em 12 dos 19 casos. A maioria delas apresentou o sinal do halo, enquanto escavação foi encontrada em 5 dos 12 casos com consolidações, sendo um deles com sinal do crescente aéreo. Nódulos e massas ocorreram em, respectivamente, seis e quatro casos, a maioria com sinal do halo. Escavação foi encontrada em apenas um caso de massa. Outros achados observados foram pavimentação em mosaico (dois casos, áreas de vidro fosco esparsas (três casos e envolvimento pleural (sete casos, sob a forma de derrame ou espessamento. CONCLUSÃO: Áreas de consolidação, massas ou nódulo, mesmo solitário, com sinal do halo, quando vistos na tomografia computadorizada em um contexto clínico apropriado, são altamente sugestivos de aspergilose angioinvasiva.OBJECTIVE: The aim of this study was to evaluate the main findings of computed tomography in patients presenting acute leukemia complicated by angioinvasive aspergillosis. MATERIALS AND METHODS: Computed tomography images of 19 patients were retrospectively studied for the presence of consolidations, nodules and masses, with or without presentation of halo sign, cavitation and air crescent sign. RESULTS: Consolidation was the most frequent finding, occurring in 12 of the 19 cases, most of them presenting the halo sign; cavitation was found in 5 of 12 cases, one of them with air crescent sign. Nodules and masses occurred respectively in six and four cases, most of them with halo sign. Cavitation was found

  2. Definição do nível da junção ureterovesical pela tomografia computadorizada Definition of ureterovesical junction level by computed tomography

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    Edison de Oliveira Freire Filho

    2006-12-01

    Full Text Available OBJETIVO: Definir o nível da implantação ureteral na bexiga através da tomografia computadorizada. MATERIAIS E MÉTODOS: Através de tomografia computadorizada da pelve com contraste endovenoso de 46 pacientes (31 homens e 15 mulheres com idade entre 18 e 45 anos, com pelo menos um dos ureteres contrastado pelo contraste excretado, medimos as distâncias do meato ureteral até o teto acetabular e a borda superior da sínfise púbica, além do volume da bexiga. Utilizamos o teste t de Student para avaliar se houve diferenças estatísticas entre grupos. RESULTADOS: O nível da implantação ureteral na bexiga foi, em média, 10,6 ± 8,1 mm abaixo do teto acetabular e, em média, 29,7 ± 9,5 mm acima da borda superior da sínfise púbica. Nos pacientes com volume de repleção vesical menor que 200 ml e maior ou igual a 200 ml os níveis da implantação ureteral na bexiga foram, em média, 11,6 ± 7,3 mm e 10,2 ± 8,4 mm abaixo do teto acetabular (p = 0,61 e, em média, 28,3 ± 7,3 mm e 30,3 ± 10,2 mm acima da borda superior da sínfise púbica (p = 0,52, respectivamente, e nos pacientes do sexo masculino e feminino foram, em média, 11,8 ± 8,0 mm e 8,3 ± 8,0 mm abaixo do teto acetabular (p = 0,17 e, em média, 27,7 ± 9,2 mm e 33,9 ± 8,8 mm acima da borda superior da sínfise púbica (p = 0,34, respectivamente. CONCLUSÃO: Calcificações localizadas abaixo de 3 cm do teto acetabular e abaixo de 1,5 cm acima da borda superior da sínfise púbica provavelmente não representam cálculos ureterais. O grau de repleção vesical e o sexo não interferem significativamente na posição do meato ureteral.OBJECTIVE: To define, by means of computed tomography, the level of ureteral implantation into de bladder. MATERIALS AND METHODS: We have measured the distances from the ureteral meatus to the acetabulum, and to the superior margin of the pubic symphysis, as well as the bladder volume, using contrast enhanced computed tomography of the pelvis

  3. Avaliação da expansão rápida da maxila por meio da tomografia computadorizada: relato de um caso Computed tomography evaluation of rapid maxillary expansion: a case report

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    Daniela Gamba Garib

    2005-08-01

    Full Text Available Este trabalho descreve os efeitos dentoesqueléticos e periodontais da expansão rápida da maxila (ERM, avaliados por meio da tomografia computadorizada (TC, em uma jovem de 11,6 anos de idade com má oclusão de Classe I e mordida cruzada posterior unilateral funcional. Durante a fase ativa da ERM, o expansor dentossuportado com parafuso Hyrax foi ativado 7mm. A paciente submeteu-se ao exame de TC helicoidal, antes da expansão e após a remoção do aparelho expansor, findo o período de três meses de contenção. Realizaram-se cortes axiais, de um milímetro de espessura, paralelamente ao plano palatino, englobando as regiões dentoalveolar e basal da maxila, até o terço inferior da cavidade nasal. Utilizando-se o recurso de reconstruções multiplanares, mensuraram-se pelo método computadorizado: as dimensões transversas maxilares, a inclinação dos dentes posteriores, a espessura das tábuas ósseas vestibular e lingual, e o nível da crista óssea alveolar vestibular. A expansão rápida da maaxila ocasionou um significante aumento transverso em todas as regiões aferidas, com magnitude decrescente do arco dentário para a base óssea. Os dentes posteriores foram movimentados para vestibular, com um componente de inclinação e translação associados. Tal efeito ortodôntico ocasionou uma redução na espessura da tábua óssea vestibular, e um concomitante aumento na espessura da tábua óssea lingual. Após a expansão, observou-se o desenvolvimento de deiscências ósseas por vestibular dos dentes de ancoragem.This paper presents a computed tomography (CT evaluation of rapid maxillary expansion dentoskeletal and periodontal effects, in a 11.6 year-old girl presenting Class I malocclusion with posterior unilateral crossbite. The tooth-borne expander with Hyrax screw was activated 7-mm. The patient was submitted to helicoidal CT scan before expansion and after the three-month retention period when the expander was removed. Axial

  4. Aquisição e manipulação de imagens por tomografia computadorizada da região maxilofacial visando à obtenção de protótipos biomédicos

    OpenAIRE

    2008-01-01

    O processo de construção de protótipos biomédicos surgiu da união das tecnologias de prototipagem rápida e do diagnóstico por imagens. No entanto, este processo é complexo, em função da necessária interação entre as ciências biomédicas e a engenharia. Para que bons resultados sejam obtidos, especial atenção deve ser dispensada à aquisição das imagens por tomografia computadorizada e à manipulação dessas imagens em softwares específicos. Este artigo apresenta a experiência multidisciplinar de ...

  5. Diagnóstico de alterações neurológicas compressivas da medula espinal de cães com o uso da Tomografia Computadorizada (TC) Helicoidal

    OpenAIRE

    2014-01-01

    Alterações neurológicas em cães são comuns na rotina da clínica médica, sendo necessário identificar o sítio de lesão quando da ocorrência de neuropatias por compressão em estruturas do Sistema Nervoso Central (SNC). O objetivo deste trabalho foi realizar um estudo epidemiológico das alterações neurológicas compressivas em medula espinal de cães domiciliados em Salvador e região metropolitana: Discopatias, Neoplasias e Traumas identificadas através da Tomografia Computadorizada (TC). Foram av...

  6. Biópsia percutânea por agulha grossa de tumores de partes moles guiada por tomografia computadorizada: resultados e correlação com análise da peça cirúrgica

    OpenAIRE

    Rubens Chojniak; Henrique Ramos Grigio; Almir Galvão Vieira Bitencourt; Paula Nicole Vieira Pinto; Tyng,Chiang J.; Isabela Werneck da Cunha; Samuel Aguiar Junior; Ademar Lopes

    2012-01-01

    OBJETIVO: Avaliar a eficácia da biópsia percutânea por agulha grossa (BPAG) de tumores de partes moles guiada por tomografia computadorizada (TC), em relação ao sucesso na obtenção de amostra para análise, e comparar o diagnóstico da BPAG com o resultado anatomopatológico da peça cirúrgica, quando disponível. MATERIAIS E MÉTODOS: Foram revisados os prontuários e laudos diagnósticos de 262 pacientes com tumores de partes moles submetidos a BPAG guiada por TC em um centro de referência oncológi...

  7. Infecção pulmonar pelo Rhodococcus equi na síndrome da imunodeficiência adquirida: Aspectos na tomografia computadorizada Rhodococcus equi infection in acquired immunodeficiency syndrome: Computed tomography aspects

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    Edson Marchiori

    2006-10-01

    Full Text Available OBJETIVO: Apresentar os aspectos na tomografia computadorizada da pneumonia pelo Rhodococcus equi em sete pacientes com síndrome da imunodeficiência adquirida. MÉTODOS: Estudo retrospectivo das tomografias de sete pacientes com síndrome da imunodeficiência adquirida e infecção pelo Rhodococcus equi. RESULTADOS: Os achados mais freqüentes foram: consolidação (n = 7 com escavação (n = 6, opacidades em vidro fosco (n = 6, nódulos do espaço aéreo (n = 4 e nódulos centrolobulares com árvore em brotamento (n = 3. CONCLUSÃO: Os achados mais comuns na infecção pulmonar pelo Rhodococcus equi em pacientes com síndrome da imunodeficiência adquirida foram as consolidações escavadas.OBJECTIVE: To present the computed tomography aspects of Rhodococcus equi pneumonia in seven patients with acquired immunodeficiency syndrome. METHODS: A retrospective study of the computed tomography scans of seven patients with acquired immunodeficiency syndrome and Rhodococcus equi infection. RESULTS: The most common findings were consolidation (n = 7, consolidation with cavitation (n = 6, ground glass opacities (n = 6, peribronchial nodules (n = 4 and centrilobular nodules presenting a "tree-in-bud" pattern (n = 3. CONCLUSION: The most common finding in patients with Rhodococcus equi pulmonary infection and acquired immunodeficiency syndrome was consolidation with cavitation.

  8. Análise por tomografia computadorizada do enxerto autógeno na cirurgia de "sinus lift" Computed tomography evaluation of autogenous graft in sinus lift surgery

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    Sérgio Aron Ajzen

    2005-02-01

    Full Text Available OBJETIVO: Quantificar a formação óssea nos enxertos com e sem plasma rico em plaquetas, obtido pelos métodos de centrifugação e aférese, comparando os três tipos de enxertos realizados por meio de análise tomográfica. MATERIAIS E MÉTODOS: Este estudo prospectivo, duplo cego, utilizou uma amostra composta de 34 pacientes adultos, de ambos os sexos, com idade média de 48 anos e 8 meses, portadores de pneumatização unilateral ou bilateral dos seios maxilares, que necessitavam de enxertos ósseos, com a finalidade de melhorar as condições locais para a colocação dos implantes dentários. Todos os pacientes realizaram tomografia computadorizada antes da cirurgia. Foram operados 53 seios maxilares, divididos em três grupos: enxerto de plasma rico em plaquetas obtido pelos métodos de aférese, centrifugação e enxerto apenas de osso autógeno. Após seis meses do procedimento cirúrgico foram realizados novos exames de imagem. RESULTADOS: Pela avaliação tomográfica, houve crescimento em altura e em largura nos três grupos quando foram comparados os momentos inicial e final, entretanto, não houve diferença estatística para a altura e para a largura. CONCLUSÃO: Evidências clínicas demonstram a eficácia dos enxertos autógenos, principalmente os associados a fatores indutores de crescimento ósseo, como o plasma rico em plaquetas, recuperando o arcabouço maxilofacial, necessário para a reconstrução protética e funcional por meio de implantes dentários.OBJECTIVE: To quantify bone formation within autogenous bone grafts and autogenous bone grafts in combination with platelet-rich plasma obtained either from aphaeresis or centrifugation using computed tomography. MATERIALS AND METHODS: This prospective, double-blind study was conducted in 34 male and female adult patients (mean age of 28 years and 8 months, with either unilateral or bilateral pneumatization of the maxillary sinuses, requiring bone graft for dental

  9. Tomografia computadorizada de abdome normal: estudo retrospectivo das angulações dos hilos renais Normal abdominal computed tomography: a retrospective study of renal hila angles

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    Makoto Sakate

    2009-02-01

    Full Text Available OBJETIVO: Obter valores da angulação média dos hilos renais em relação ao plano horizontal, traçado sobre músculos eretores da espinha direito e esquerdo, considerando como parâmetro de referência para as medidas das angulações o centro da coluna vertebral lombar. MATERIAIS E MÉTODOS: Foram analisados 250 exames de tomografia computadorizada de abdomes considerados normais de indivíduos de ambos os sexos, sendo 128 masculinos (idade média de 52,45 ± 17,42 anos e 122 femininos (idade média de 54,39 ± 18,27 anos, totalizando 500 hilos renais estudados. A angulação média de cada hilo renal em relação ao plano horizontal foi obtida, sendo considerados sempre os ângulos agudos. RESULTADOS: O estudo comparativo entre os sexos mostrou que não houve diferença estatisticamente significante em relação aos ângulos agudos dos hilos renais. A análise estatística mostrou, com intervalo de confiança de 95%, para média do ângulo direito os limites de 40,40° e 44,54° e para o hilo renal esquerdo os limites de 39,91° e 43,23°. CONCLUSÃO: Os hilos renais, independentemente do sexo, apresentam angulações semelhantes. Valores angulares maiores terão anomalia de hiper-rotação ou hiper-rotação exagerada e valores menores terão anomalia de rotação incompleta ou rotação invertida.OBJECTIVE: To obtain mean angulation values for renal hila in relation to the horizontal plane traced over the right and left spinal erector muscles, considering the center of the lumbar vertebral spine as a parameter for measuring the renal hila angles. MATERIALS AND METHODS: The authors have analyzed 250 abdominal computed tomography studies of both male and female healthy individuals (128 men with mean age 52.45 ± 17.42 years, and 122 women with mean age 54.39 ± 18.27 years, corresponding to 500 renal hila evaluated. The mean angulation of each hilum in relation to the horizontal plane was obtained taking acute angles into consideration

  10. Study of the relationship and importance of clinical semiology, axial computed tomography and electroneuromyography in lumbar radioculopathies Estudo da relação e da importância entre a semiologia clínica, tomografia axial computadorizada e eletroneuromiografia nas radiculopatias lombares

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    Emílio Cezar Mamede Murade

    2002-12-01

    Full Text Available The authors evaluated forty-three patients with clinical suspect of lumbar radiculopathy caused by disk hernia, concerning to clinical semiology, computed tomography and electromyography were studied and their correlations. The clinical semiology was altered in 100,0% of the patients, the computed tomography in 90,7% and the electromyography in 88,7%. The correlation among the three exams didn´t show any prevalency among any of the possible associations. The authors emphasize the importance of clinical semiology, computed tomography and electromyography for a more accurate diagnosis of lumbar radiculopathy following by disk hernia.Os autores estudaram 43 pacientes com suspeita clínica de radiculopatia lombar, causada por hérnia de disco, relacionando os achados da semiologia clínica, tomografia axial computadorizada e eletroneuromiografia, entre si. A semiologia clínica estava alterada em 100,0% dos pacientes, a tomografia axial computadorizada em 90,7% e a eletroneuromiografia em 88,7%. A correlação entre os três exames não mostrou prevalência entre nenhuma associação. Os autores enfatizam a importância da semiologia clínica, tomografia axial computadorizada e eletroneuromiografia para maior exatidão diagnóstica das radiculopatias lombares por hérnia de disco.

  11. Análise de carcinomas epidermóides por meio de radiografia panorâmica e tomografia computadorizada Analysis of squamous cell carcinomas by means of panoramic radiography and computed tomography

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    Amanda Cáceres PEREIRA

    2001-12-01

    Full Text Available Este trabalho teve como objetivo correlacionar aspectos radiográficos como, localização e extensão do tumor, infiltração óssea e de tecidos moles e destruição das corticais, obtidos nas radiografias panorâmicas com os encontrados nas tomografias computadorizadas (TCs. Os aspectos radiográficos de 48 pacientes com diagnóstico histopatológico de carcinomas epidermóides, localizados em várias regiões do complexo buco-maxilo-facial, foram analisados por 4 radiologistas. As radiografias panorâmicas e as tomografias computadorizadas foram realizadas nos hospitais e clínicas da Universidade de Iowa (EUA, FUNDECTO - USP e Hospital Universitário da Universidade de São Paulo (SP, Brasil. Como resultados, obtivemos a grande limitação da radiografia panorâmica em determinar a localização e extensão do tumor, com delimitações bastante imprecisas da lesão. Já as TCs ofereceram resultados mais direcionados como: invasão do tumor em direção a estruturas moles adjacentes, extensão da destruição óssea, bem como a profundidade da lesão, que foram confirmados com os achados cirúrgicos. Concluímos que a tomografia computadorizada demonstrou ser uma técnica bastante sensível na detecção do comprometimento ósseo e do envolvimento de tecidos moles, proporcionando, assim, o auxílio no diagnóstico e no planejamento do tratamento. No entanto, a radiografia panorâmica foi muito pouco sensível e eficaz, por mostrar apenas margens imprecisas e pouco nítidas da lesão, não avaliando o envolvimento de tecidos moles.The purpose of this work was to compare radiographic findings, such as localization and extension of tumors toward the bone and soft tissues, in panoramic radiography and computed tomography (CT. Four radiologists assessed the radiographic findings of 48 patients with the histopathological diagnosis of squamous cell carcinoma in different sites of the maxillofacial region. Panoramic radiographs and computed

  12. Fibrose maciça progressiva em trabalhadores expostos à sílica: achados na tomografia computadorizada de alta resolução Progressive massive fibrosis in silica-exposed workers: high-resolution computed tomography findings

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    Ângela Santos Ferreira

    2006-12-01

    Full Text Available OBJETIVO: Avaliar as características radiológicas das massas conglomeradas pela tomografia computadorizada de alta resolução de tórax. MÉTODOS: Foram selecionados 75 pacientes silicóticos, a maioria jateadores de areia, portadores de fibrose maciça progressiva, atendidos no Hospital Universitário Antônio Pedro entre 1986 e 2004. Os pacientes foram submetidos a avaliação clínica, radiografia simples de tórax e tomografia computadorizada de alta resolução. RESULTADOS: Mais da metade dos pacientes com silicose complicada mostrou na radiografia de tórax grandes opacidades dos tipos B e C, denotando a gravidade da doença nesses pacientes. Dos 75 casos, apenas um apresentou massa unilateral simulando câncer de pulmão. Quarenta e quatro pacientes realizaram tomografia computadorizada de alta resolução do tórax. As massas predominaram nos terços superiores e posteriores (88,6%. Broncograma aéreo e calcificações no interior das massas foram observados em 70,4% e 63,8% dos casos, respectivamente. História de tuberculose foi relatada em 52% dos pacientes estudados. CONCLUSÃO: Na grande maioria dos casos as massas eram bilaterais, predominando nas regiões póstero-superiores dos pulmões, com broncogramas aéreos e calcificações de permeio. Associação com calcificações linfonodais foi um achado freqüente. A exposição a elevadas concentrações de poeira e a tuberculose foram consideradas fatores de risco para o desenvolvimento da fibrose maciça progressiva.OBJECTIVE: To evaluate the radiological characteristics of conglomerate masses using high-resolution computed tomography of the chest. METHODS: From among the patients treated between 1986 and 2004 at the Antonio Pedro University Hospital, 75 patients with silicosis and massive fibrosis, most working in the field of sandblasting, were selected for study. These patients were submitted to a clinical evaluation, chest X-ray and high-resolution computed tomography of

  13. Estudo comparativo do diagnóstico de câncer pulmonar entre tomografia computadorizada e broncoscopia Comparative study between computed tomography and bronchoscopy in the diagnosis of lung cancer

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    Christopher Oliveira

    2010-08-01

    Full Text Available OBJETIVO: Analisar a tomografia computadorizada e a broncoscopia no diagnóstico do câncer pulmonar e verificar a eficácia destas técnicas perante a presença desta doença. Os parâmetros idade, gênero, hábitos tabágicos, tipos histológicos, estadiamento e terapêutica foram, igualmente, analisados. MATERIAIS E MÉTODOS: Foram analisados 70 pacientes do Serviço de Pneumologia do Hospital Distrital da Figueira da Foz, Coimbra, Portugal, que realizaram ambas as técnicas em estudo, tendo-se confirmado ou não a presença de câncer pulmonar. RESULTADOS: Diagnosticaram-se 37 tumores pulmonares, 23 casos no gênero masculino e 14 no feminino. Histologicamente, 40,54% eram adenocarcinomas, seguido do carcinoma escamoso (32,43% dos casos e do carcinoma de pequenas células (18,92%. O estadiamento mostrou 6,70% no estádio IB, 23,30% no estádio IIIA comparativamente ao IIIB com 36,70%, encontrando-se 33,30% dos doentes no estádio IV. A quimioterapia isolada foi efetuada em 75,7% dos doentes. A sensibilidade da broncoscopia foi de 83,8%, a especificidade, de 81,8%, e a precisão, de 82,8%. A sensibilidade da tomografia computadorizada foi de 81,1%, a especificidade, de 63,6%, e a precisão, de 72,8%. CONCLUSÃO: Os resultados da broncoscopia confirmaram a sua importância no diagnóstico do câncer pulmonar, pela dependência deste no exame anatomopatológico do tecido ou células, obtido por várias técnicas de biópsia. A tomografia computadorizada apresentou boa sensibilidade, de 81,1%, contudo, a sua especificidade, de apenas 63,6%, resulta do número de falso-positivos (36,4%.OBJECTIVE: To analyze the role of computed tomography and bronchoscopy in the diagnosis of lung cancer, evaluating the effectiveness of these techniques in the presence of this disease. Parameters such as age, gender, smoking habits, histological types, staging and treatment were also analyzed. MATERIALS AND METHODS: The sample of the present study included 70

  14. Proposta para padronização do relatório de tomografia computadorizada nos aneurismas da aorta abdominal A proposal for standardizing computed tomography reports on abdominal aortic aneurysms

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    Fabiola Goda Torlai

    2006-08-01

    Full Text Available OBJETIVO: Propor um modelo de padronização de relatório para aneurisma da aorta abdominal na tomografia computadorizada. MATERIAIS E MÉTODOS: Foram realizadas, no período de abril a outubro de 2004, entrevistas com integrantes da Disciplina de Cirurgia Vascular da nossa instituição, para elaboração de um modelo de padronização de relatório de tomografia computadorizada para o estudo do aneurisma da aorta abdominal. A partir deste modelo foi elaborado um questionário, enviado a nove outros cirurgiões, todos com experiência em cirurgia da aorta abdominal. O índice de resposta aos questionários foi de 55,5% (5/9. RESULTADOS: Os parâmetros de interesse citados mais freqüentemente para a avaliação dos aneurismas de aorta abdominal foram: diâmetro máximo do colo proximal, extensão do colo proximal até a artéria renal mais baixa, forma do colo proximal, diâmetro máximo do aneurisma e diâmetro das artérias ilíacas comuns. Estes dados permitiram elaborar uma proposta de modelo para padronização de relatório na tomografia computadorizada. CONCLUSÃO: Um modelo para a análise tomográfica padronizada do aneurisma de aorta abdominal permite atender às necessidades dos cirurgiões vasculares para acompanhar a evolução e planejar o tratamento destes pacientes.OBJECTIVE: To propose a model to standardize computed tomography reports on abdominal aortic aneurysms. MATERIALS AND METHODS: Interviews were carried out with members of Vascular Surgery Division of our institution, in the period between April and October 2004, aiming at developing a standardized model of computed tomography reports on abdominal aortic aneurysms. Based on this model, a questionnaire was elaborated and sent to other nine surgeons, all of them experienced in the field of abdominal aortic surgery. The questionnaires response rate was 55.5% (5/9. RESULTS: The most frequently mentioned parameters of interest for evaluation of abdominal aortic aneurysms

  15. Comparação morfométrica da orelha interna entre ovinos e humanos através da tomografia computadorizada CT-Scan sheep and human inner ear morphometric comparison

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    Valter Ayres Seibel

    2006-06-01

    Full Text Available INTRODUÇÃO: trabalhos sobre o uso de ovelhas em cirurgias experimentais e treinamento em cirurgia otológica são raros. Este estudo pretende contribuir para ampliar o conhecimento nessa área. OBJETIVO: Estudar a orelha interna da ovelha por meio de tomografia computadorizada e cortes sucessivos com o intuito de apresentar dados morfométricos mais precisos relacionados à comparação entre a orelha de ovelhas e a de humanos. MATERIAL E MÉTODO: Foi realizado um estudo descritivo sem seguimento no qual foram comparadas as estruturas da orelha interna da ovelha com as dos humanos. As medidas foram obtidas através de tomografias computadorizadas e avaliadas por meio de um programa de análise de imagens médicas (Osíris 4.16. RESULTADOS: O estudo morfológico da orelha da ovelha, em média, e da orelha humana, em média, revelaram grande similaridade de anatomia. A maior parte das estruturas (10 de 15 preservou a relação proposta de 2/3 da dimensão humana em relação à dimensão ovina. CONCLUSÃO: Os achados contribuem para uso da orelha da ovelha como modelo em cirurgia experimental e treinamento em cirurgia otológica.INTRODUCTION: Studies about the use of sheep in surgical training and experimental otologic surgery are rare. This study intends to contribute to the knowledge on this field. AIM: To study sheep inner ear structures using computerized tomography and serial cross-sections to collect more accurate morphometric data to compare sheep and human ears. MATERIAL AND METHODS: This descriptive study compared the inner structures of sheep and human ears. Measurements were made using computerized tomography, and they were stored in a DICOM compact disc for later analysis and manipulation, with a program used for medical image analysis (Osíris 4.16. RESULTS: Mean measures for sheep and human ears were found to be similar in this morphological study. Most structures (10 out of 15 maintained the 2/3 ratio of sheep to human ear

  16. Quando a fase de equilíbrio pode ser suprimida nos exames de tomografia computadorizada de abdome? What is the real role of the equilibrium phase in abdominal computed tomography?

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    Priscila Silveira Salvadori

    2013-04-01

    Full Text Available OBJETIVO: Avaliar a necessidade de realização da fase de equilíbrio nos exames de tomografia computadorizada de abdome. MATERIAIS E MÉTODOS: Realizou-se estudo retrospectivo, transversal e observacional, avaliando 219 exames consecutivos de tomografia computadorizada de abdome com contraste intravenoso, realizados num período de três meses, com diversas indicações clínicas. Para cada exame foram emitidos dois pareceres, um avaliando o exame sem a fase de equilíbrio (primeira análise e o outro avaliando todas as fases em conjunto (segunda análise. Ao final de cada avaliação, foi estabelecido se houve mudança nos diagnósticos principais e secundários, entre a primeira e a segunda análise. Foi utilizada a extensão do teste exato de Fisher para avaliar a modificação dos diagnósticos principais (p 0,999. Com relação aos diagnósticos secundários, cinco exames (2,3% foram modificados. CONCLUSÃO: Para indicações clínicas como estadiamento tumoral, abdome agudo e pesquisa de coleção abdominal, a fase de equilíbrio não acrescenta contribuição diagnóstica expressiva, podendo ser suprimida dos protocolos de exame.OBJECTIVE: To evaluate the role of the equilibrium phase in abdominal computed tomography. MATERIALS AND METHODS: A retrospective, cross-sectional, observational study reviewed 219 consecutive contrast-enhanced abdominal computed tomography images acquired in a three-month period, for different clinical indications. For each study, two reports were issued - one based on the initial analysis of non-contrast-enhanced, arterial and portal phases only (first analysis, and a second reading of these phases added to the equilibrium phase (second analysis. At the end of both readings, differences between primary and secondary diagnoses were pointed out and recorded, in order to measure the impact of suppressing the equilibrium phase on the clinical outcome for each of the patients. The extension of the exact Fisher

  17. Radiograma de tórax e tomografia computadorizada na avaliação do enfisema pulmonar Chest X-ray and computed tomography in the evaluation of pulmonary emphysema

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    Klaus Loureiro Irion

    2007-12-01

    Full Text Available O enfisema é uma condição do pulmão, caracterizada pelo aumento acima do normal no tamanho dos espaços aéreos distais ao bronquíolo terminal. Atualmente, o enfisema é a quarta causa de morte nos EUA, afetando 14 milhões de pessoas. O presente artigo descreve as principais ferramentas no diagnóstico por imagem do enfisema, desde o início até os dias de hoje. Relata as técnicas tradicionais, como radiograma de tórax, e as evoluções no campo da tomografia computadorizada (TC, como a TC de alta resolução e a densitovolumetria pulmonar por TC tridimensional.Emphysema is a condition of the lung, characterized by the abnormal increase in the size of the airspace distal to the terminal bronchioles. Currently, emphysema is the fourth leading cause of death in the USA, affecting 14 million people. The present article describes the principal tools in the imaging diagnosis of emphysema, from the early days until the present. We describe traditional techniques, such as chest X-ray, together with the evolution of computed tomography (CT to more advanced forms, such as high resolution CT, as well as three-dimensional CT densitometry and volumetric assessment.

  18. Tomografia computadorizada da matriz óssea mineralizada heteróloga fragmentada e metilmetacrilato na reparação de falhas ósseas segmentares produzidas em tíbia de coelhos

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    S.H. Freitas

    2012-12-01

    Full Text Available Foi realizada falha segmentar de 6mm na região metafisária medial da tíbia de 12 coelhos, seguida de preenchimento desta por matriz óssea mineralizada heteróloga fragmentada conservada em glicerina (98% e metilmetacrilato autoclavado, bem como avaliação por meio da tomografia computadorizada de feixe cônico (cone beam aos 30, 60 e 90 dias. Houve incorporação gradativa do implante no leito receptor em relação ao tempo em 100% dos casos, o que mostra ser este biologicamente compatível, ao promover reparação da falha óssea, sem sinais de infecção, migração e/ou rejeição, caracterizando-se, assim, como nova opção de substituto ósseo para preenchimento de falhas ósseas.

  19. Tomografia computadorizada de feixe cônico (Cone beam: entendendo este novo método de diagnóstico por imagem com promissora aplicabilidade na Ortodontia Cone beam computed tomography (CBCT: understandind this new imaging diagnostic method with promissing application in Orthodontics

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    Daniela Gamba Garib

    2007-04-01

    Full Text Available OBJETIVO: este artigo visa informar e atualizar o profissional da área odontológica a respeito da tomografia computadorizada, incluindo informações concernentes à aquisição de imagens, dose de radiação e interpretação do exame tomográfico, com distinção entre a tomografia computadorizada tradicional e a tomografia computadorizada de feixe cônico. Adicionalmente, as possibilidades de aplicação deste método de diagnóstico por imagem na Ortodontia são discutidas. CONCLUSÕES: resultado de avanços tecnológicos, da redução da exposição à radiação e da ótima qualidade da imagem, as expectativas apontam para uma utilização mais abrangente da tomografia computadorizada de feixe cônico na Odontologia e na Ortodontia. Com a definição de novos conhecimentos gerados pela visão tridimensional do crânio e da face, o futuro reserva a renovação de conceitos e paradigmas, assim como a redefinição de metas e planos terapêuticos ortodônticos.OBJECTIVES: This article aims to inform and update the dental professional regarding computed tomography (CT, including information related to image acquisition, radiation dose and CT interpretation, with distinction between the traditional CT and the cone beam CT. Additionally, the possibilities of application of CT in Orthodontics are discussed. CONCLUSION: As a result of technological advances, lower radiation dose and optimal image quality, the expectations point to a more wide utilization of cone beam computed tomography in Dentistry and Orthodontics. With the definition of new knowledge generated from the three-dimensional view of cranium and face, the future can bring changes in concepts and paradigms as well as the redefinition of orthodontic objectives and treatment plans.

  20. Diagnóstico de alterações neurológicas compressivas da medula espinal de cães com o uso da Tomografia Computadorizada (TC Helicoidal

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    Roberto R. Borges-dos-Santos

    2014-06-01

    Full Text Available Alterações neurológicas em cães são comuns na rotina da clínica médica, sendo necessário identificar o sítio de lesão quando da ocorrência de neuropatias por compressão em estruturas do Sistema Nervoso Central (SNC. O objetivo deste trabalho foi realizar um estudo epidemiológico das alterações neurológicas compressivas em medula espinal de cães domiciliados em Salvador e região metropolitana: Discopatias, Neoplasias e Traumas identificadas através da Tomografia Computadorizada (TC. Foram avaliados 17 cães de diversas raças com idade entre 2 e 10 anos e de ambos os sexos, atendidos na rotina de dois serviços médicos-veterinários e encaminhados para realização do exame conforme indicação clínica. Imagens em cortes com espessura variando de 0,5 a 2mm em rotação foram produzidas com o Tomógrafo. Dos animais que apresentaram discopatia 12/17 (70,58%, por mielopatia extradural 6/12 (50 %, foram da raça Dachshund com idade média 7,33±1,97 anos e para todos os outros a ocorrência foi pontual; 23,53 % de osteopatias vertebrais, neoplasias ósseas e fraturas, e 5,89% correspondente a neoplasia de medula. Houve uma maior frequência de lesões nos segmentos C4-C6 3/12 (25%, T12-T13 (25 % e L2-L3 (25 % dos casos.

  1. Avaliação do espaço aéreo faríngeo por meio da tomografia computadorizada de feixe cônico Assessment of pharyngeal airway space using Cone-Beam Computed Tomography

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    Sabrina dos Reis Zinsly

    2010-10-01

    Full Text Available INTRODUÇÃO: a avaliação do espaço aéreo superior faz parte da rotina na elaboração do diagnóstico e plano de tratamento ortodôntico. A radiografia cefalométrica em norma lateral tem sido usada rotineiramente na avaliação da permeabilidade do espaço aéreo, esbarrando na limitação de fornecer uma imagem bidimensional de uma estrutura tridimensional. A Tomografia Computadorizada de Feixe Cônico (TCFC tem entrado na realidade ortodôntica trazendo um arsenal de informações concernentes ao espaço aéreo superior. Por fornecer uma imagem tridimensional, possibilita determinar de maneira precisa a área de maior estreitamento da faringe, que ofereceria maior resistência à passagem aérea. OBJETIVOS: o propósito deste artigo é esclarecer o ortodontista quanto aos recursos disponíveis na TCFC para o diagnóstico de possíveis barreiras físicas que possam diminuir a permeabilidade das vias aéreas superiores.INTRODUCTION: Evaluation of upper airway space is a routine procedure in orthodontic diagnosis and treatment planning. Although limited insofar as they provide two dimensional images of three-dimensional structures, lateral cephalometric radiographs have been used routinely to assess airway space permeability. Cone-Beam Computed Tomography (CBCT has contributed to orthodontics with information concerning the upper airway space. By producing three-dimensional images CBCT allows professionals to accurately determine the most constricted area, where greater resistance to air passage occurs. OBJECTIVES: The purpose of this article is to enlighten orthodontists on the resources provided by CBCT in the diagnosis of possible physical barriers that can reduce upper airway permeability.

  2. Aquisição e manipulação de imagens por tomografia computadorizada da região maxilofacial visando à obtenção de protótipos biomédicos Acquisition and manipulation of computed tomography images of the maxillofacial region for biomedical prototyping

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    Maria Inês Meurer

    2008-02-01

    Full Text Available O processo de construção de protótipos biomédicos surgiu da união das tecnologias de prototipagem rápida e do diagnóstico por imagens. No entanto, este processo é complexo, em função da necessária interação entre as ciências biomédicas e a engenharia. Para que bons resultados sejam obtidos, especial atenção deve ser dispensada à aquisição das imagens por tomografia computadorizada e à manipulação dessas imagens em softwares específicos. Este artigo apresenta a experiência multidisciplinar de um grupo de pesquisadores com a aquisição e a manipulação de imagens por tomografia computadorizada do complexo maxilofacial, visando à construção de protótipos biomédicos com finalidade cirúrgica.Biomedical prototyping has resulted from a merger of rapid prototyping and imaging diagnosis technologies. However, this process is complex, considering the necessity of interaction between biomedical sciences and engineering. Good results are highly dependent on the acquisition of computed tomography images and their subsequent manipulation by means of specific softwares. The present study describes the experience of a multidisciplinary group of researchers in the acquisition and manipulation of computed tomography images of the maxillofacial region aiming at biomedical prototyping for surgical purposes.

  3. Comparison of ultrasonography, computed tomography and magnetic resonance imaging with intraoperative measurements in the evaluation of abdominal aortic aneurysms Comparação entre ultrassonografia, tomografia computadorizada e ressonância nuclear magnética com medidas intra-operatórias na avaliação dos aneurismas de aorta abdominal

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    Francisco das Chagas de Azevedo

    2005-02-01

    angioresonance provided measurements with no significant differences in the statistic view when compared to the intraoperative measures. CONCLUSIONS: Ultrasonography is a reliable method for the diagnosis and follow-up of the aorta abdominal aneurysms, but insufficient for endovascular surgery planning. The conventional computed tomography can provoke distortion in the length measurements of the aorta dilatation. Helical computed tomography and nuclear magnetic angioresonance provided precise measurements of all the studied parameters, being of great utility for surgical planning.OBJETIVO: Estudar os métodos mais freqüentemente empregados na avaliação dos aneurismas de aorta abdominal - ultrassonografia, tomografia computadorizada convencional, tomografia computadorizada helicoidal e angio-ressonância nuclear magnética - comparando as medidas fornecidas por estes exames radiológicos no pré-operatório com medidas realizadas durante a operação. MÉTODO: Foram incluídos no estudo pacientes portadores de aneurisma da aorta abdominal com indicação de tratamento cirúrgico eletivo por via transperitoneal. O diagnóstico inicial da dilatação aórtica foi feito com ultra-sonografia e, uma vez indicado o tratamento cirúrgico, era então solicitado um outro exame radiológico complementar, já que não é nossa rotina operar esses pacientes com base apenas na ultra-sonografia. Sessenta pacientes foram divididos em 3 grupos de acordo com o exame complementar realizado (tomografia computadorizada convencional, tomografia computadorizada helicoidal ou angio-ressonância nuclear magnética. As ultra-sonografias dos 20 primeiros pacientes foram incluídas em um 4° grupo. Analisamos neste estudo as medidas do colo proximal da aorta, o diâmetro transverso máximo e o comprimento do aneurisma, além do diâmetro transverso das artérias ilíacas comuns conseguidos a partir dos exames radiológicos. As mesmas medidas eram realizadas por ocasião da operação com o auxílio de

  4. Anatomic considerations for C2 pedicle screw placement: the use of computerized tomography measurements Consideraciones anatómicas de la cocalización de los tornillos pediculares en C2: uitlización de las medidas de la tomografia computadorizada Considerações anatômicas sobre a localização dos parafusos pediculares em C2: utilização das medidas da tomografia computadorizada

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    Adebukoa Onibokun

    2009-03-01

    eje del pedículo y el ángulo transverso del pedículo (ángulo entre el eje del pedículo y la línea media del cuerpo vertebral. RESULTADOS: el valor promedio del ancho pedicular fue de 5.8 1.2mm. En el sexo masculino el valor promedio del ancho del pedículo (6.0 1.3mm fue mayor comparado con el sexo femenino (5.6 1.1mm, sin embargo no fue observada una diferencia estadística. El valor promedio del ángulo transverso del pedículo fue de 43.9 3.9 grados, siendo de 43.2 3.8 grados en el sexo masculino y 44.7 3.7 grados en el sexo femenino. CONCLUSIÓN: la proyección y determinación en el periodo preoperatorio de las dimensiones anatómicas del pedículo C2 son importantes para la determinación de la trayectoria y dimensiones del local donde el implante será colocado.OBJETIVO: o conhecimento detalhado das características anatômicas do pedículo de C2 é necessário para minimizar os riscos relacionados com a colocação dos parafusos. O objetivo deste trabalho é avaliar as medidas lineares e angulares do eixo axial verdadeiro do pedículo de C2 utilizando tomografia computadorizada. MÉTODOS: foram utilizadas tomografias computadorizadas axiais de 93 pacientes (47 do sexo masculino e 46 do sexo feminino com média de idade de 48 anos. As imagens axiais do pedículo de C2 foram selecionadas para o estudo e os parâmetros estudados foram: largura do pedículo (diâmetro mediolateral do istmo do pedículo perpendicular ao eixo do pedículo e o ângulo tranverso do pedículo (ângulo entre o eixo do pedículo e a linha média do corpo vertebral. RESULTADOS: o valor médio da largura do pedículo foi 5,81,2mm. Nos pacientes de sexo masculino o valor médio da largura do pedículo (6,01,3mm foi maior que nos pacientes de sexo feminino (5,61,1mm. No entanto, não foi observada diferença estatística. O valor médio do ângulo transverso do pedículo foi de 43,93,9 graus, sendo de 43,23,8 graus no sexo masculino e 44,73,7 graus no sexo feminino. CONCLUSÃO: o

  5. PERCEPÇÕES DA EQUIPE DE ENFERMAGEM SOBRE SEGURANÇA DO IDOSO NA TOMOGRAFIA COMPUTADORIZADA CARDÍACA CONTRASTADA

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    Laura Vargas Acauan

    2014-01-01

    Full Text Available Estudio descriptivo, abordaje cualitativo, con objetivo de conocer la percepción del cuadro de enfermería sobre la seguridad de ancianos en la administración de medios de contraste yodados. La recolección de datos fue por medio de entrevista, de julio a agosto de 2012, con once participantes, en centros de diagnóstico por imagen de dos hospitales de Brasilia, Distrito Federal, Brasil. El análisis y procesamiento de datos siguió el análisis de contenido, surgiendo la categoría seguridad de los ancianos en la realización de la tomografía cardiaca computadorizada. Se concluye que el cuadro de enfermería entiende que la seguridad de los ancianos se asocia con su capacidad de evaluar los riesgos de reacciones adversas en la administración del radiofármaco, en que se entrelazan procesos, tecnologías e interacciones humanas, lo que implica en prácticas seguras.

  6. New molecular targets for PET and SPECT imaging in neurodegenerative diseases Novos alvos moleculares para tomografia por emissão de pósitrons (PET e tomografia computadorizada por emissão de fóton único (SPECT em doenças neurodegenerativas

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    Marcel Benadiba

    2012-10-01

    Full Text Available The pathophysiology of neurodegenerative diseases (ND such as Alzheimer's disease (AD and Parkinson's disease (PD has not yet been completely elucidated. However, in the past few years, there have been great knowledge advances about intra-and extracellular proteins that may display impaired function or expression in AD, PD and other ND, such as amyloid beta (Aβ, α-synuclein, tau protein and neuroinflammatory markers. Recent developments in the imaging techniques of positron emission tomography (PET and single photon emission computed tomography (SPECT now allow the non-invasive tracking of such molecular targets of known relevance to ND in vivo. This article summarizes recent findings of PET and SPECT studies using these novel methods, and discusses their potential role in the field of drug development for ND as well as future clinical applications in regard to differential diagnosis of ND and monitoring of disease progression.A fisiopatologia das doenças neurodegenerativas (DN, tais como a doença de Alzheimer (DA e a doença de Parkinson (DP, ainda não é completamente compreendida. No entanto, nos últimos anos, houve grandes avanços em termos do conhecimento sobre proteínas intra e extracelulares, tais como beta-amiloide (Aβ, α-sinucleína, proteína tau e marcadores neuroinflamatórios, que podem ter sua função ou expressão prejudicada na DA, DP ou em outras DN. Progressos recentes nas técnicas de tomografia por emissão de pósitrons (PET e tomografia computadorizada por emissão de fóton único (SPECT permitem hoje em dia a identificação não invasiva de tais alvos moleculares in vivo. Este artigo resume descobertas recentes de estudos de PET e SPECT cerebral usando esses alvos moleculares inovadores e discute o papel potencial dessas técnicas no campo do desenvolvimento de novos medicamentos para as DN, bem como futuras aplicações clínicas em relação ao diagnóstico diferencial e monitoramento da progressão dessas

  7. Complicações pulmonares após uso de crack: achados na tomografia computadorizada de alta resolução do tórax Pulmonary complications of crack cocaine use: high-resolution computed tomography of the chest

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    Alexandre Mançano

    2008-05-01

    Full Text Available Relatamos os achados na tomografia computadorizada de alta resolução de um paciente que, após uso de cocaína fumada (crack, desenvolveu quadro de hemoptise, dispnéia e dor torácica súbitas. As radiografias de tórax mostravam consolidações predominando em lobos superiores. A tomografia de alta resolução evidenciava opacidades em vidro fosco, consolidações e nódulos do espaço aéreo. Nova tomografia de controle, após suspensão da droga e uso de corticóides, mostrou regressão parcial das lesões e aparecimento de escavações. A correlação entre os achados clínicos, laboratoriais e de imagem permitiu o diagnóstico de "pulmão de crack".Here, we report high-resolution computed tomography (HRCT findings in a patient who developed sudden hemoptysis, dyspnea and chest pain after smoking crack cocaine. Chest X-rays showed consolidations, primarily in the upper lobes, and HRCT scans showed ground glass attenuation opacities, consolidations and air-space nodules. A follow-up CT, after drug use discontinuation and administration of corticosteroids, showed partial resolution of pulmonary lesions and the appearance of cavitations. Clinical, imaging and laboratory findings led to a diagnosis of 'crack lung'.

  8. Biópsia pulmonar percutânea guiada por tomografia computadorizada: dados de um hospital Percutaneous computed tomography-guided biopsy of the lung: data from a hospital

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    Emílio Humberto Carazzai

    2006-08-01

    Full Text Available OBJETIVO: Apresentar a experiência do serviço de radiologia do Hospital Santa Cecília, São Paulo, SP, no manejo das biópsias pulmonares por aspiração através de agulha fina e biópsias por fragmentos guiadas por tomografia computadorizada e a análise de sua importância e associação com suas complicações. MATERIAIS E MÉTODOS: Foram analisadas 168 biópsias guiadas por tomografia, sendo 84 em homens e 84 em mulheres. Utilizou-se a técnica de biópsia por aspiração por agulha fina em 64 pacientes, a técnica de biópsia por fragmento em 68 pacientes e ambas as técnicas em 36 pacientes. RESULTADOS: Pneumotórax ocorreu em 38 pacientes e a hemorragia pulmonar, em dez pacientes. As dimensões das lesões biopsiadas variaram de 0,5 cm até 15 cm. O diagnóstico foi realizado na primeira tentativa em 132 casos e na segunda tentativa em dez casos. CONCLUSÃO: A acurácia das biópsias aspirativas por agulha fina e por fragmento de lesões pulmonares depende do tamanho da lesão e da colaboração do paciente. Essas técnicas são relativamente seguras e têm acurácia diagnóstica elevada quando feitas por um profissional experiente.OBJECTIVE: To present the experience of Santa Cecília Hospital (São Paulo, SP, Brazil radiology service in the handling of computed tomography-guided fine-needle aspiration biopsy and percutaneous core biopsy of pulmonary lesions, analyzing their importance and associated complications. MATERIALS AND METHODS: One hundred and sixty-eight computed tomography-guided biopsies were performed in 84 men and 84 women. Sixty-four patients underwent fine-needle aspiration biopsy, 68 underwent percutaneous core biopsy and 36 patients underwent both techniques. RESULTS: Pneumothorax occurred in 38 patients, and pulmonary hemorrhage in then cases. The biopsied lesions ranged in size from 0.5 to 15 cm. The diagnosis was achieved at the first attempt in 132 cases and at the second attempt in ten cases. CONCLUSION: The

  9. Immediate adverse reactions to intravenous iodinated contrast media in computed tomography Reacciones adversas inmediatas al contraste yodado intravenoso en tomografía computarizada Reações adversas imediatas ao contraste iodado intravenoso em tomografia computadorizada

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    Beatriz Cavalcanti Juchem

    2007-02-01

    ório-descritiva, de caráter não experimental, com o objetivo de conhecer as reações adversas imediatas ao contraste iodado intravenoso em pacientes hospitalizados, submetidos a tomografia computadorizada num hospital-escola no Sul do Brasil. Durante o período de estudo, todas as reações adversas manifestaram-se na intensidade leve, com freqüência de 12,5% com o uso de contraste iodado iônico e 1% com contraste não iônico. Extravasamento do meio radiopaco ocorreu em 2,2% das injeções em veia periférica, não havendo complicações em nenhum dos casos. Os resultados encontram-se dentro dos limites citados na literatura internacional e sugere-se que os serviços de tomografia conheçam as próprias taxas de reações adversas ao contraste iodado e as condições em que elas ocorrem, a fim de obter evidências para a avaliação dos respectivos processos assistenciais.

  10. Biópsia percutânea de lesões ósseas guiada por tomografia computadorizada: taxas de definição diagnóstica e complicações

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    Macello Jose Sampaio Maciel

    2014-10-01

    Full Text Available Objetivo: Determinar taxas de definição diagnóstica e complicações da biópsia percutânea guiada por tomografia computadorizada (TC de lesões ósseas suspeitas de malignidade. Materiais e Métodos: Estudo retrospectivo que incluiu 186 casos de biópsia percutânea guiada por TC de lesões ósseas no período de janeiro de 2010 a dezembro de 2012. Todas as amostras foram obtidas usando agulhas de 8 a 10 gauge. Foram coletados dados demográficos, história de neoplasia maligna prévia, dados relacionados à lesão, ao procedimento e ao resultado histológico. Resultados: A maioria dos pacientes era do sexo feminino (57% e a idade média foi 53,0 ± 16,4 anos. Em 139 casos (74,6% a suspeita diagnóstica era metástase e os tumores primários mais comuns foram de mama (32,1% e próstata (11,8%. Os ossos mais envolvidos foram coluna vertebral (36,0%, bacia (32,8% e ossos longos (18,3%. Houve complicações em apenas três pacientes (1,6%, incluindo uma fratura, um caso de parestesia com comprometimento funcional e uma quebra da agulha necessitando remoção cirúrgica. Amostras de 183 lesões (98,4% foram consideradas adequadas para diagnóstico. Resultados malignos foram mais frequentes nos pacientes com suspeita de lesão secundária e história de neoplasia maligna conhecida (p < 0,001 e nos procedimentos orientados pela PET/CT (p = 0,011. Conclusão: A biópsia percutânea guiada por TC é segura e eficaz no diagnóstico de lesões ósseas suspeitas.

  11. Multiparametric multidetector computed tomography scanning on suspicion of hyperacute ischemic stroke: validating a standardized protocol Avaliação multiparamétrica por tomografia computadorizada multidetectores na suspeita de isquemia cerebral hiperaguda: validando um protocolo padronizado

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    Felipe Torres Pacheco

    2013-06-01

    Full Text Available Multidetector computed tomography (MDCT scanning has enabled the early diagnosis of hyperacute brain ischemia. We aimed at validating a standardized protocol to read and report MDCT techniques in a series of adult patients. The inter-observer agreement among the trained examiners was tested, and their results were compared with a standard reading. No false positives were observed, and an almost perfect agreement (Kappa>0.81 was documented when the CT angiography (CTA and cerebral perfusion CT (CPCT map data were added to the noncontrast CT (NCCT analysis. The inter-observer agreement was higher for highly trained readers, corroborating the need for specific training to interpret these modern techniques. The authors recommend adding CTA and CPCT to the NCCT analysis in order to clarify the global analysis of structural and hemodynamic brain abnormalities. Our structured report is suitable as a script for the reproducible analysis of the MDCT of patients on suspicion of ischemic stroke.A tomografia computadorizada multidetectores (TCMD permitiu o diagnóstico precoce de isquemia cerebral hiperaguda. O presente estudo objetivou validar a interpretação e a descrição padronizada de um protocolo de TCMD multiparamétrica em uma série de pacientes adultos. A concordância entre os examinadores foi testada, e seus resultados confrontados com uma leitura padrão. Não foram observados resultados falso-positivos, e foi documentado um elevado grau de concordância (Kappa>0,81 quando os dados da angiotomografia (ATC e dos mapas de perfusão cerebral por TC (PCTC foram adicionados à análise da TC sem contraste (TCSC. A concordância interobservador foi superior para os leitores melhor treinados, corroborando a necessidade de formação específica para a interpretação dos exames. Os autores recomendam acrescer a interpretação da ATC e da PCTC à análise da TCSC, visando à análise global das anormalidades cerebrais estruturais e hemodin

  12. Calcificação nos núcleos da base na tomografia computadorizada: correlação clínica em 25 pacientes consecutivos Basal ganglia calcification on computed tomography: clinical characteristics in 25 patients

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    Glória Maria A.S. Tedrus

    2006-03-01

    Full Text Available Analisamos os aspectos clínicos de 25 pacientes consecutivos que apresentaram calcificação nos núcleos da base na tomografia computadorizada (TC de crânio. Esta ocorreu em 0,68% de todos os exames realizados no período. Vinte e três pacientes apresentavam condições clínicas diversas, a saber: cefaléia em 7 casos, acidente vascular cerebral em 5, síndrome extrapiramidal em 2, processo expansivo cerebral em 2, epilepsia, retardo do desenvolvimento neuropsicomotor, demência e trauma de crânio em um caso cada ou outras condições neurológicas em 3. Não havia sintomas neurológicos em 2 casos. Em 15 pacientes (60,0% havia, além da calcificação dos núcleos da base, outras alterações na TC. Correlação clínica foi observada apenas com as outras alterações da TC e não com a calcificação dos núcleos da base, corroborando a hipótese de que esta possa ser um achado incidental.Twenty-five patients presenting basal ganglia calcification were assessed. This finding comprised 0.68% of all skull CT scan carried out during the period. Two patients were neurologically asymptomatic and 23 presented a variety neurological disorders - headache (7 patients, stroke (5 patients, extrapyramidal syndromes (2 patients, tumor (2 patients, epilepsy (1 patient, mental retardation (1 patient, dementia (1 patient, cranial trauma (1 patient, other neurological conditions (3 patients - or were asymptomatic from the neurological point of view (2 patients. Findings in the CT scan other than the basal ganglia calcification were observed in 15 (60% patients. There was a clinical-CT scan correlation in these cases but not in those in which the basal ganglia calcification was an isolated finding. This study highlights the fact that basal ganglia calcification is often a nonspecific finding on CT scan and that it may not be possible to establish a clinical-pathological correlation between them.

  13. Biópsia percutânea por agulha grossa de tumores de partes moles guiada por tomografia computadorizada: resultados e correlação com análise da peça cirúrgica

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    Rubens Chojniak

    2012-10-01

    Full Text Available OBJETIVO: Avaliar a eficácia da biópsia percutânea por agulha grossa (BPAG de tumores de partes moles guiada por tomografia computadorizada (TC, em relação ao sucesso na obtenção de amostra para análise, e comparar o diagnóstico da BPAG com o resultado anatomopatológico da peça cirúrgica, quando disponível. MATERIAIS E MÉTODOS: Foram revisados os prontuários e laudos diagnósticos de 262 pacientes com tumores de partes moles submetidos a BPAG guiada por TC em um centro de referência oncológico entre 2003 e 2009. RESULTADOS: Das 262 biópsias realizadas, foi possível a obtenção de amostra adequada em 215 (82,1%. Os tumores mais prevalentes foram os sarcomas (38,6%, carcinomas metastáticos (28,8%, tumores mesenquimais benignos (20,5% e linfomas (9,3%. Foi possível realizar graduação histológica em 92,8% dos pacientes com sarcoma, sendo a maioria (77,9% classificada como alto grau. Do total de pacientes, 116 (44,3% realizaram cirurgia para exérese e confirmação diagnóstica. A BPAG mostrou acurácia de 94,6% na identificação de sarcomas, com sensibilidade de 96,4% e especificidade de 89,5%. A graduação histológica teve concordância significativa entre a BPAG e a peça cirúrgica (p < 0,001; kappa = 0,75. CONCLUSÃO: A BPAG guiada por TC demonstrou elevada acurácia diagnóstica na avaliação de tumores de partes moles e na graduação histológica dos sarcomas, permitindo um adequado planejamento terapêutico.

  14. Calibração das câmaras de ionização para feixes de tomografia computadorizada no Brasil: a realidade atual Calibration of ionization chambers for computed tomography beams in Brazil: the present reality

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    Ana Figueiredo Maia

    2006-06-01

    Full Text Available OBJETIVO: O objetivo deste trabalho foi estabelecer, no Laboratório de Calibração de Instrumentos do Instituto de Pesquisas Energéticas e Nucleares, uma metodologia de calibração específica para as câmaras de ionização tipo lápis, que são utilizadas em procedimentos dosimétricos em feixes de tomografia computadorizada, seguindo as mais recentes recomendações internacionais. MATERIAIS E MÉTODOS: Foram utilizados, neste estudo, um equipamento de radiação X industrial, várias câmaras de ionização, um sistema de colimação móvel (tipo diafragma e vários filtros de alumínio de alta pureza. RESULTADOS: Foram estabelecidos os campos padrões de radiodiagnóstico descritos na norma internacional IEC 61267, e foi elaborado um procedimento de calibração adequado para as câmaras de ionização tipo lápis. CONCLUSÃO: Atualmente, já é possível calibrar apropriadamente as câmaras de ionização tipo lápis no Brasil. O procedimento de calibração foi definido com base nas recomendações internacionais e em testes feitos com duas metodologias distintas.OBJECTIVE: The aim of this study was to establish a calibration methodology specific for pencil ionization chambers used in computed tomography dosimetric procedures, in compliance with the most recent recommendations. The study was developed at the Calibration Laboratory of the Instituto de Pesquisas Energéticas e Nucleares. MATERIALS AND METHODS: An industrial x-ray equipment, several types of ionization chambers, a mobile collimator (diaphragm type, and several high purity aluminum filters were utilized in this study. RESULTS: Diagnostic radiology standard irradiation fields were established according to IEC 61267 standard, and an adequate calibration procedure for pencil ionization chambers was elaborated. CONCLUSION: The appropriate calibration of pencil ionization chambers is already a reality in Brazil. The calibration procedure was defined on the basis of

  15. Skull radiographs and computed tomography scans in children and adolescents with mild head trauma Radiografia simples e tomografia computadorizada do crânio em crianças e adolescentes vítimas de traumatismo craniano leve

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    José Roberto Tude Melo

    2008-01-01

    Full Text Available OBJECTIVE: To identify which pediatric patients with mild head trauma are candidates for skull radiographs or cranial computed tomography (CCT scans. METHOD: Patients with mild head trauma aged from 0 to 19 years presenting to the Emergency Department of a trauma centre from Salvador City, Brazil, between May 2007 and May 2008. RESULTS: A total of 1888 mild head trauma patients were admitted; mean age was 7.4 (±5.5 years. A total of 1956 skull radiographs and 734 CCT scans were performed. About 44.4% patients with Glasgow coma score (GCS 13 and 55.4% with GCS 14 had abnormal CCT scans. In patients with multiple traumas, 16% had abnormal findings on CCT scans. CONCLUSION: We strongly recommend routine CCT studies to patients with GCS of 13 and 14 or to multiple trauma victims, independently of score. Routine screening skull radiographs were not useful in the evaluation of mild head trauma patients in this study.OBJETIVO: Identificar quais os pacientes na faixa pediátrica com trauma craniencefálico leve são candidatos para a realização de radiografia simples ou tomografia computadorizada do crânio (TCC. MÉTODO: Pacientes com trauma craniano leve, entre 0 e 19 anos, admitidos em um centro de referência em traumatologia, na cidade do Salvador, Brasil, entre maio 2007 e maio 2008. RESULTADOS: Foram atendidos 1888 pacientes com trauma craniano leve, com idade média de 7,4 (±5,5 anos. Um total de 1956 radiografias simples e 734 TCC foram realizadas. Em 44,4% dos pacientes com escala de coma de Glasgow (GCS 13 e 55.4% com GCS 14, tiveram TCC com achados anormais. Em pacientes com múltiplos traumas, 16% possuíam alterações na TCC. CONCLUSÃO: Recomendamos TCC em pacientes com GCS 13 e 14 ou naqueles com traumas múltiplos, independente do GCS. Radiografias simples do crânio como rotina, não foram identificadas como úteis, no presente estudo.

  16. Acute pleuropulmonary complications detected by computed tomography following myocardial revascularization Cirurgia de revascularização do miocárdio: complicações pleuro-pulmonares agudas caracterizadas por tomografia computadorizada de tórax

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    Francisco S. Vargas

    2002-08-01

    Full Text Available INTRODUCTION: Pleuropulmonary changes are common following coronary artery bypass grafting surgery performed with a saphenous vein graft, with or without an internal mammary artery. The presence of atelectasis or pleural effusions reflects the thoracic trauma. PURPOSE: To define the postoperative incidence of changes in the lung and in the pleural space and to evaluate the influence of the trauma. METHODS: Thirty patients underwent elective coronary artery bypass grafting surgery (8 saphenous vein grafts and 22 saphenous vein grafts and internal mammary artery grafts with pleurotomy. Chest tubes in the left pleural space were used in all internal mammary artery patients. On the second (day 2 and seventh (day 7 postoperative day, patients underwent a computed tomography, and pleural effusions were rated as follows: grade 0 = no fluid to grade 4 = fluid in more than 75% of the hemithorax. Atelectasis was rated as follows: laminar = 1, segmental = 3, and lobar = 10 points. RESULTS: All patients had pleural effusion or atelectasis. Between day 2 and day 7, the number of patients with effusions or atelectasis on the right side decreased (P INTRODUÇÃO: O comprometimento pleuro-pulmonar é freqüente após cirurgia de revascularização do miocárdio independente do uso de veia safena ou de artéria mamária interna. A presença de atelectasias e derrame pleural tem sido atribuída ao trauma torácico. OBJETIVOS: Definir a incidência do comprometimento pleuro-pulmonar observado através de tomografia computadorizada, analisando a influência do trauma no desenvolvimento destas complicações. MÉTODOS: Trinta pacientes foram submetidos a cirurgia eletiva de revascularização do miocárdio (8 safena e 22 também mamária com pleurotomia. Foi drenada a cavidade pleural esquerda de todos os pacientes do grupo mamária. Realizada Tomografia Computadorizada do tórax no 2º e 7º dias pós-op, avaliando-se o derrame pleural (0: sem líquido e 4: derrame

  17. Densidade de um planossolo sob sistemas de cultivo avaliada por meio da tomografia computadorizada de raios gama Bulk density of an alfisol under cultivation systems in a long-term experiment evaluated with gamma ray computed tomography

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    Adilson Luís Bamberg

    2009-10-01

    Full Text Available A sustentabilidade do arroz (Oryza sativa L. irrigado em solos de várzea está alicerçada na utilização da rotação e sucessão de culturas, fundamentais para o controle do arroz-vermelho e preto. Os reflexos sobre os atributos dos solos de várzea merecem estudos em especial sobre a compactação do solo. O objetivo deste trabalho foi identificar camadas compactadas em Planossolo submetido a diferentes sistemas de cultivo e preparo, avaliando-se a densidade do solo (Ds pela Tomografia Computadorizada de Raios Gama (TC. A análise foi realizada em um experimento de longa duração, conduzido de 1985 a 2004, na Estação Experimental da Embrapa Clima Temperado, Capão do Leão, RS, num delineamento experimental em blocos ao acaso, com sete tratamentos, cada um com quatro repetições (T1 - um ano de arroz com preparo convencional do solo seguido de dois anos de pousio; T2 - cultivo contínuo de arroz com preparo convencional do solo; T4 - rotação de arroz e soja (Glycine max L. com preparo convencional do solo; T5 - rotação de arroz, soja e milho (Zea maiz L. em preparo convencional do solo; T6 - plantio direto de arroz no verão em sucessão do azevém (Lolium multiflorum L. no inverno; T7 - rotação de arroz sob plantio direto e soja sob preparo convencional do solo; T8 - testemunha: solo sem cultivo. A Tomografia Computadorizada de Raios Gama permitiu detectar que o plantio direto de arroz no verão em sucessão do azevém no inverno não resultou na formação de camadas compactadas; a utilização de dois anos de pousio, no sistema de produção de arroz irrigado, não foi suficiente para evitar a formação de uma camada superficial compactada; e a rotação de arroz, soja e milho com preparo convencional do solo apresentou duas camadas compactadas (0,0 a 1,5 cm e 11 a 14 cm, indicando que essas podem limitar a produção agrícola nesse sistema de produção em Planossolos.The sustainability of irrigated rice (Oryza sativa L. in

  18. Análise das variações morfológicas da ATM em pacientes com artrite reumatóide através de tomografia computadorizada = Analysis of the morphologyc variations in the TMJ the patients with rheumatoid arthritis through the computer tomography

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    Vasconcelos, Belmiro Cavalcanti do Egito

    2005-01-01

    Full Text Available Realizou-se um estudo qualitativo e quantitativo enfocando as alterações morfométricas da articulação temporomandibular (ATM, em pacientes com o diagnóstico de artrite reumatóide (AR por meio de tomografia computadorizada. Foram analisados 6 casos onde são descritas as alterações estruturais dos componentes ósseos de 12 ATMs. Os resultados indicaram que todas as ATMs apresentaram alterações, sendo as alterações mais freqüentes a esclerose óssea subcondral, seguida do aplainamento da eminência articular. Todos os pacientes apresentaram distúrbio de mobilidade

  19. Aquisição e manipulação de imagens por tomografia computadorizada da região maxilofacial visando à obtenção de protótipos biomédicos Acquisition and manipulation of computed tomography images of the maxillofacial region for biomedical prototyping

    OpenAIRE

    2008-01-01

    O processo de construção de protótipos biomédicos surgiu da união das tecnologias de prototipagem rápida e do diagnóstico por imagens. No entanto, este processo é complexo, em função da necessária interação entre as ciências biomédicas e a engenharia. Para que bons resultados sejam obtidos, especial atenção deve ser dispensada à aquisição das imagens por tomografia computadorizada e à manipulação dessas imagens em softwares específicos. Este artigo apresenta a experiência multidisciplinar de ...

  20. Obstrução em alça fechada com ruptura do ceco: aspectos na tomografia computadorizada - relato de um caso Computed tomography findings in closed obstruction of the small bowel associated with rupture of the cecum: a case report

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    Sheila Jandhyra Vianna Crespo

    2001-06-01

    Full Text Available A obstrução intestinal em alça fechada determina uma situação de extrema gravidade, com conseqüências sérias, podendo por vezes levar ao óbito. Os autores descrevem um caso de obstrução intestinal secundária a câncer no sigmóide, destacando a importância da tomografia computadorizada na análise das alterações patológicas na rotina de abdome agudo.Closed loop obstruction of the bowel is an extremely grave condition that may lead to serious consequences and even be fatal. The authors describe a case of a patient with intestinal obstruction secondary to cancer of the sigmoid and highlight the importance of computed tomography in the analysis of the pathological changes in routine management of patients with acute abdomen.

  1. Avaliação da concordância interobservador na análise da tomografia computadorizada sem contraste no diagnóstico da urolitíase em pacientes com cólica renal aguda Interobserver agreement on non-contrast computed tomography interpretation for diagnosis of urolithiasis in patients with acute flank pain

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    Luís Ronan Marquez Ferreira de Souza

    2006-10-01

    Full Text Available OBJETIVO: Avaliar a reprodutibilidade da tomografia computadorizada sem contraste na avaliação da litíase ureteral e os sinais secundários de obstrução do sistema coletor em pacientes com cólica renal aguda. MATERIAIS E MÉTODOS: Estudo prospectivo de 52 pacientes com diagnóstico clínico de cólica renal aguda submetidos a exame de tomografia computadorizada de abdome sem contraste. Os exames foram realizados com técnica helicoidal e posteriormente analisados por três observadores independentes, com a concordância interobservador avaliada pelo método estatístico kappa (kapa. Foram analisados os parâmetros: a presença, localização e mensuração dos cálculos ureterais; b dilatação do sistema coletor intra-renal; c heterogeneidade da gordura perirrenal; d dilatação ureteral; e edema da parede ureteral (sinal do halo. RESULTADOS: Foram encontrados 40 cálculos ureterais na tomografia computadorizada (77%. A concordância interobservador para a identificação do cálculo ureteral e da dilatação ureteral foi quase perfeita (kapa = 0,89 e kapa = 0,87, respectivamente, substancial para dilatação do sistema coletor intra-renal (kapa = 0,77 e moderada para heterogeneidade da gordura perirrenal e para edema da parede ureteral (kapa = 0,55 e kapa = 0,56, respectivamente. CONCLUSÃO: A tomografia computadorizada de abdome sem contraste apresenta elevada reprodutibilidade na avaliação da litíase ureteral e dos sinais secundários de obstrução do sistema coletor.OBJECTIVE: To evaluate the interobserver agreement on non-contrast computed tomography interpretation by a group of experienced abdominal radiologists, for the study of urolithiasis in patients presenting acute flank pain. MATERIALS AND METHODS: Prospective study of 52 patients submitted to non-contrast enhanced helical computed tomography. The images were subsequently analyzed by three independent observers, with the interobserver agreement assessed by means of the

  2. Localização dos sulcos e giros da face súpero-lateral do cérebro na tomografia computadorizada e na ressonância magnética The sulci and gyri localization of the brain superolateral surface in computed tomography and magnetic resonance imaging

    OpenAIRE

    Sebastião Gusmão; Guilherme Carvalhal Ribas; Roberto Leal Silveira; Uedsom Tazinaffo

    2001-01-01

    O conhecimento da anatomia da face súpero-lateral do cérebro é fundamental para localizar e abordar as lesões cerebrais. Faz-se a revisão da literatura dos sinais e referências para identificar os sulcos e giros da face súpero-lateral do cérebro na tomografia computadorizada e na ressonância magnética. O uso conjunto dos vários sinais possibilita a identificação dos sulcos e giros e a localização das lesões cerebrais na quase totalidade dos casos.The knowledge of the superolateral surface bra...

  3. O efeito da "sedação multifásica" no exame de tomografia computadorizada e ressonância magnética em crianças, pais e anestesiologistas

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    Guray Demir

    2012-08-01

    Full Text Available JUSTIFICATIVA E OBJETIVOS: O nosso objetivo foi investigar o efeito da "sedação multifásica" em crianças submetidas à Tomografia Computadorizada (TC ou Ressonância Magnética (RM, em seus pais e nos anestesiologistas responsáveis. "Sedação multifásica" foi definida como "o nível de sedação pretendido obtido com um ou mais agentes através da mesma via ou vias diferentes com mais de uma administração". MATERIAL E MÉTODOS: Cem crianças e seus respectivos pais foram randomicamente designados para um dos dois grupos de estudo. Na fase 1, os pacientes do Grupo I receberam midazolam (0,5 mg.kg-1 em 5 mL de suco de frutas e os pacientes do Grupo II (grupo controle receberam apenas suco de frutas. Na fase 2, após a canulação intravenosa (iv, bolus de propofol foi administrado para alcançar a sedação adequada para realização do exame de imagem. Os escores de ansiedade das crianças e de seus pais foram registrados usando a escala de Oucher e o IDATE, respectivamente, e a satisfação dos pais foi avaliada pela escala analógica visual (EAV. O número de tentativas para canulação iv, tempo de preparação e quantidade de hipnóticos foram registrados. RESULTADOS: O estado de ansiedade das crianças foi semelhante entre os grupos antes da pré-medicação, porém mais tarde esse nível foi menor no Grupo I. Antes do procedimento, o escore dos pais no IDATE foi semelhante, mas depois foi menor no Grupo I. A satisfação dos pais no Grupo I foi maior que no Grupo II. O número de tentativas de canulação iv e a dose necessária de propofol foi menor no Grupo I. CONCLUSÃO: O procedimento de "sedação multifásica" diminui a dor e a ansiedade das crianças e a ansiedade dos pais, aumentando a sua satisfação. Ele fornece uma sedação confortável e segura, pois possui um processo de preparação curto e sem problemas também para o anestesiologista responsável.

  4. Correlação entre hipótese diagnóstica e laudo de tomografia axial computadorizada craniana Correlation between diagnostic hypothesis and result of cranial computed axial tomography

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    Edison Matos Nóvak

    2001-09-01

    Full Text Available Para avaliar a utilização da tomografia axial computadorizada craniana (TC em nosso meio, analisamos as solicitações de 367 exames consecutivos no período compreendido entre 07/1995 e 07/1996. Houve ampla variação da faixa etária, com média de 31,7 ± 22,9 anos. As especialidades que mais solicitaram o exame foram: Neurologia (36,2%, Pronto Atendimento (17,4%, Neuropediatria (16,9% e Clínica Médica (5,9%. As indicações mais frequentes para o exame foram: convulsão (30%, cefaléia (26,2%, déficit motor (20,2% e redução do nível de consciência (16,9%. As "hipóteses" aventadas com maior frequência foram: afastar lesão estrutural (9,0%, acidente vascular não discriminado (8,2% e neurocisticercose (8,2%. O laudo da TC foi normal em 50,4% dos exames. Os laudos anormais mais frequentes foram: hidrocefalia (5,4%, acidente vascular isquêmico (5,4% e neoplasia (3,5%. As maiores taxas de achados normais foram encontradas nas "hipóteses" de cefaléia (94,4%, convulsão (71,4% e afastar lesão estrutural (66,7%. Os maiores índices de acerto entre hipótese e laudo foram encontrados nas situações de "afastar lesões estruturais" (66,7%, hidrocefalia (50%, acidente vascular cerebral isquêmico (50% e hematoma (50%. Concluimos que a utilização de um recurso auxiliar de diagnóstico como a TC cumpre melhor ainda a sua função se o requisitante do exame preencher com clareza e detalhamento o pedido do exame.The use of computed axial tomography (CT in the investigation of neurologic disorders is attractive for his disponibility in the health services. However, the indications of the exam and the correlation with the clinical features has not been frequently studied. We study correlation between the requests of CT and the findings reported by the radiologist, in 367 exams performed from 07/1995 to 07/ 1996. The mean age was 31.7 ± 22.9 years. The CT were requested in decrescent order of frequency by the Services of Neurology (36

  5. Tomografia computadorizada quantitativa periférica de alta resolução para avaliação de parâmetros morfológicos e funcionais ósseos

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    Henrique Fuller

    2015-08-01

    Full Text Available RESUMOA tomografia computadorizada quantitativa periférica de alta resolução (HR-pQCT é uma nova tecnologia disponível comercialmente há menos de 10 anos que permite a feitura de exames in vivo para a avaliação de parâmetros ósseos. A HR-pQCT avalia a forma, o número, o volume, a densidade, a conectividade e a separação das trabéculas; a densidade e a espessura do osso cortical e o volume e a densidade total, em alta definição, o que permite a construção digital da microarquitetura óssea adicionalmente. A aplicação de cálculos matemáticos aos dados capturados, método denominado elemento finito (FE, permite a estimativa das propriedades físicas do tecido e simula cargas suportadas de forma não invasiva. Desse modo, a HR-pQCT adquire simultaneamente dados antes fornecidos separadamente pela densitometria óssea, pela ressonância magnética e pela histomorfometria e agrega estimativas biomecânicas antes só possíveis em tecidos extraídos. A reprodutibilidade do método é satisfatória, com coeficientes de variação que raramente ultrapassam os 3%. Quanto à acurácia, os parâmetros apresentam de regular a boa concordância (r2= 0,37-0,97.A principal aplicação clínica é na quantificação e no monitoramento das doenças osteometabólicas, porque avalia de modo mais completo a resistência óssea e o risco de fratura. Na artrite reumatoide permite-se a aferição do número e do tamanho das erosões e dos cistos, além do espaço articular. Na osteoartrite é possível caracterizar as áreas edema-símile que guardam correlação com a degradação da cartilagem.Restritas ainda a um instrumento de pesquisa, dado o seu elevado custo, a alta resolução e a eficiência mostram-se como vantagens em relação aos métodos atualmente usados para a avaliação óssea, com um potencial para tornar-se uma importante ferramenta na prática clínica.

  6. Enterografia por tomografia computadorizada: experiência inicial na avaliação das doenças do intestino delgado CT enterography: a preliminary experience in the evaluation of small bowel diseases

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    Luciana Costa-Silva

    2010-10-01

    Full Text Available OBJETIVO: O objetivo deste estudo é demonstrar a importância da enterografia por tomografia computadorizada (entero-TC e como este exame pode contribuir na elucidação diagnóstica e avaliação clínica de pacientes com doenças do intestino delgado. MATERIAIS E MÉTODOS: Análise retrospectiva de 35 pacientes submetidos a entero-TC realizadas em aparelho multidetector de 16 canais, entre maio de 2008 e março de 2009. Utilizou-se meio de contraste iodado venoso e oral neutro (polietilenoglicol. As principais indicações foram avaliação de doença de Crohn, diarreia de origem indeterminada e suspeita de neoplasias. RESULTADOS: Houve boa correlação dos achados à entero-TC relacionados à atividade da doença em pacientes com doença de Crohn, quando comparados com dados clínicos, laboratoriais e endoscópicos. Em 15 casos identificaram-se alterações compatíveis com doença de Crohn, 9 deles sugerindo atividade. Dos pacientes com diarreia, o exame elucidou a maioria dos casos. Identificaram-se dois casos de tumor carcinoide. CONCLUSÃO: A entero-TC é método simples e eficaz para estudo das doenças inflamatórias/neoplásicas do intestino delgado, sobretudo na avaliação da doença de Crohn, indicando atividade da doença. Uma de suas principais vantagens é a possibilidade de avaliação de alterações mesentéricas e extraintestinais associadas.OBJECTIVE: The present study was aimed at demonstrating the value of computed tomography enterography (CT enterography and how this imaging method can be useful in the diagnostic elucidation and assessment of patients with small bowel diseases. MATERIALS AND METHODS: Retrospective evaluation of 35 patients submitted to CT enterography in a 16-row multidetector CT equipment from May/2008 to March/2009. All the patients received intravenous and neutral oral iodinated contrast agents (polyethylene glycol. Main indications were: Crohn's disease, diarrhea of undetermined origin and suspicion

  7. Computed tomography scan of the head in patients with migraine or tension-type headache Tomografia computadorizada do crânio em pacientes com migrânea ou cefaléia tensional

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    Marcelo Moraes Valença

    2002-09-01

    Full Text Available A retrospective study was performed in order to evaluate the frequency of abnormalities found by computed tomography (CT scan of the head in 78 patients with migraine or tension-type headache. In the present study CT scan was normal in 61.5% of the patients with migraine or tension-type headache. A number of abnormalities were encountered in more than one third of the patients studied, including inflammatory sinus disease (19.2%, cysticercosis (3.9%, unruptuted cerebral aneurysm (2.6%, basilar impression (2.6%, intracranial lipoma (2.6%, arachnoid cyst (2.6%, empty sella (2.6%, intracranial neoplasm (2.6%, and others (2.6%. None of these lesions were symptomatic or responsible by the headache picture, therefore, considered incidental findings. In conclusion, the fortuitous encounter of some abnormalities on CT scan of the head is often higher than what we could predict in patients suffering migraine or tension-type headache. We briefly discuss clinical, epidemiologic, and practical management of some of the abnormalities detected by CT scan as well as the indication to request a neuroimaging investigation.Um estudo retrospectivo foi realizado visando avaliar a frequência de anormalidades encontradas durante a realização de estudo por tomografia computadorizada (TC em 78 pacientes com migrânea ou cefaléia do tipo tensional. A TC foi normal em 61,5% dos pacientes examinados. Em um terço dos pacientes estudados foram detectadas anormalidades, como doença inflamatória dos seios paranasais (19,2%, cisticercose (3,9%, aneurisma cerebral não-roto (2,6%, impressão basilar (2,6%, lipoma intracraniano (2,6%, cisto aracnoideo (2,6%, sela vazia (2,6%, neoplasia intracraniana (2,6% e outras afecções (2,6%. Nenhuma destas lesões era sintomática (achado incidental. Concluindo, o encontro fortuito de algumas anormalidades na TC é frequentemente mais elevado do que se prediz em pacientes com cefaléia primária. Nós discutimos brevemente alguns

  8. Validation of computed tomography protocols for simulated mandibular lesions: a comparison study Validação de protocolos de tomografia computadorizada para lesões simuladas em mandíbula: estudo comparativo

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    Andréia Perrella

    2007-06-01

    Full Text Available Computed tomography is the choice technique to assess oral and maxillofacial osseous lesions because it provides hard and soft tissues visualization in one examination without superimposition of surrounding structures. This examination offers a significant advance in maxillofacial lesions detection with an excellent anatomic resolution. The aim of this research was to evaluate the validity of two protocols, in axial sections, in simulated mandibular lesions. Two CT protocols were obtained in dry mandibles in which perforations were done simulating lesions. Two observers, previously calibrated, evaluated the images according to different parameters. The results indicated that the sensitivity and specificity in lesion detection were 100% for both protocols, but the detection of loci number of multilocular lesions and the location and detection of medullar invasion obtained reduced validity values, which were influenced by the acquisition protocol. We concluded that thinner axial slices and reconstructions were more effective in detecting early medullar invasion and loci number. Thicker protocols were not considered appropriate to detect multilocular lesions and early stages of medullar invasion.A tomografia Computadorizada é a técnica de escolha no exame de lesões ósseas orais e maxilo-faciais porque proporciona a visualização de tecidos duros e moles em aquisição única e sem sobreposição de estruturas adjacentes. Este exame oferece um avanço significativo na detecção de lesões maxilo-faciais, com excelente resolução anatômica. O objetivo desta pesquisa foi avaliar a validade de dois protocolos, em secções axiais, em lesões simuladas de mandíbula. Dois protocolos de TC foram obtidos em mandíbulas secas em que foram feitas perfurações, simulando lesões. Dois observadores previamente calibrados avaliaram as imagens seguindo parâmetros diversos. Como resultados pudemos observar que a sensibilidade e a especificidade foram

  9. Tuberculose pulmonar: achados na tomografia computadorizada de alta resolução do tórax em pacientes com doença em atividade comprovada bacteriologicamente Pulmonary tuberculosis: findings on high resolution computerized tomography of active disease on patients with bacteriological confirmation

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    CRISTIANE ALÓ CAMPOS

    2002-01-01

    Full Text Available Objetivo: Descrever os achados em pacientes com tuberculose pulmonar em atividade na tomografia computadorizada de alta resolução e o padrão de distribuição das lesões pelo parênquima pulmonar. Casuística e método: Foram analisadas retrospectivamente as tomografias de alta resolução de 42 pacientes com diagnóstico bacteriológico de tuberculose pulmonar ou forte suspeita clínica, com posterior confirmação bacteriológica. Resultados: Os principais sinais sugestivos de atividade encontrados foram nódulos do espaço aéreo (83%, nódulos centrolobulares (74%, aspecto de árvore em brotamento (67%, cavitações (67%, espessamento das paredes brônquicas (55%, consolidações (48%, opacidade em vidro fosco (21%, e espessamento do interstício pulmonar (9%. Conclusão: A tomografia computadorizada de alta resolução do tórax pode sugerir fortemente atividade da doença, sendo particularmente útil nos pacientes com baciloscopias negativas e/ou radiografias indeterminadas, permitindo a instituição de tratamento adequado, antes mesmo do crescimento da micobactéria em meio de cultura.Background: The aim of this study was to describe the signs of active tuberculosis in patients submitted to high resolution computerized tomography and the distribution of lesions along the pulmonary parenchyma. Material and methods: The high resolution CTs performed on 42 patients with tuberculosis either bacteriologically diagnosed or clinical suspected and later confirmed by bacteriological tests were studied. Results: The signs of disease activity observed were airspace nodule (83%, centrilobular nodule (74%, tree-in-bud pattern (67%, cavitations (67%, bronchial thickening (55%, parenchymal consolidations (48%, ground glass opacity (21% and thickening of the inter and intralobular septa (9%. Conclusion: High resolution computed tomography can be strongly suggestive of disease activity, is particularly helpful in patients with negative smear and

  10. Persistent asthma in adults: comparison of high resolution computed tomography of the lungs after one year of follow-up Asma persistente em adultos: comparação da tomografia computadorizada de tórax de alta resolução após um ano de seguimento

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    Alberto Cukier

    2001-06-01

    Full Text Available OBJECTIVE: The aims of this study were to evaluate the role of high resolution computed tomography of the torax in detecting abnormalities in chronic asthmatic patients and to determine the behavior of these lesions after at least one year. METHOD: Fourteen persistent asthmatic patients with a mean forced expiratory volume in 1-second that was 63% of predicted and a mean forced expiratory volume in 1-second /forced vital capacity of 60% had two high resolution computed tomographys separated by an interval of at least one year. RESULTS: All 14 patients had abnormalities on both scans. The most common abnormality was bronchial wall thickening, which was present in all patients on both computed tomographys. Bronchiectasis was suggested on the first computed tomography in 5 of the 14 (36% patients, but on follow-up, the bronchial dilatation had disappeared in 2 and diminished in a third. Only one patient had any emphysematous changes; a minimal persistent area of paraseptal emphysema was present on both scans. In 3 patients, a "mosaic" appearance was observed on the first scan, and this persisted on the follow-up computed tomography. Two patients had persistent areas of mucoid impaction. In a third patient, mucus plugging was detected only on the second computed tomography. CONCLUSIONS: We conclude that there are many abnormalities on the high resolution computed tomography of patients with persistent asthma. Changes suggestive of bronchiectasis, namely bronchial dilatation, frequently resolve spontaneously. Therefore, the diagnosis of bronchiectasis by high resolution computed tomography in asthmatic patients must be made with caution, since bronchial dilatation can be reversible or can represent false dilatation. Nonsmoking chronic asthmatic subjects in this study had no evidence of centrilobular or panacinar emphysema.OBJETIVO: Avaliar o papel da tomografia computadorizada de tórax de alta resolução em detectar alterações estruturais

  11. Comparação entre tomografia computadorizada e mediastinoscopia na avaliação do envolvimento ganglionar mediastínico no carcinoma brônquico não de pequenas células Comparison between computed tomography and mediastinoscopy in the assessment of mediastinal nodal involvement in non-small cell bronchial carcinoma

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    Décio Valente Renck

    2007-02-01

    Full Text Available OBJETIVO: Avaliar o rendimento da tomografia computadorizada torácica, em relação à mediastinoscopia, na detecção de metástases ganglionares mediastinais em pacientes portadores de carcinoma brônquico analisando o rendimento dessa e identificando as regiões mais problemáticas. MATERIAIS E MÉTODOS: Analisamos 195 pacientes portadores de carcinoma brônquico, buscando-se comparar os achados entre tomografia computadorizada torácica e mediastinoscopia com biópsia. RESULTADOS: Em relação às metástases nodais mediastinais, 33,9% tinham doença metastática ganglionar peribrônquica e/ou hilar ipsilateral, 46,1% possuíam metástases mediastinais ipsilaterais e/ou subcarinais e 20% apresentavam doença metastática mediastinal e/ou hilar contralateral, escalênica ou supraclavicular. As regiões com melhores valores de sensibilidade foram traqueobrônquica direita, paratraqueal direita alta e paratraqueal esquerda alta. As regiões nodais com melhores resultados de especificidade foram paratraqueal esquerda alta, paratraqueal direita alta e regiões traqueobrônquicas. CONCLUSÃO: A tomografia computadorizada torácica mostrou-se importante ferramenta diagnóstica na detecção de anormalidades em gânglios mediastinais; entretanto, a natureza neoplásica desses gânglios deve ser conferida por mediastinoscopia, ou até mesmo por toracotomia, a fim de que a correta decisão quanto ao tratamento possa ser tomada.OBJECTIVE: To evaluate the yielding of chest computed tomography in comparison with mediastinoscopy for detection of mediastinal nodal metastases in patients with bronchial carcinoma, and identifying the most problematic regions. MATERIALS AND METHODS: We have analyzed 195 patients with bronchial carcinoma, comparing the findings of chest computed tomography and mediastinoscopy with biopsy. RESULTS: As regards mediastinal nodal metastasis, 33.9% of patients presented peribronchial and/or ipsilateral hilar nodal metastases, 46

  12. Tomografia computadorizada na avaliação da distribuição do tecido adiposo abdominal de ratos alimentados com rações hiperlipídicas após desnutrição neonatal Computed tomography in the evaluation of abdominal fat distribution associated with a hyperlipidic diet in previously undernourished rats

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    Carlos Alberto Soares da Costa

    2007-10-01

    Full Text Available OBJETIVO: Descrever repercussões da ração suplementada com óleo de soja ou óleo de canola, por meio da tomografia computadorizada, na distribuição do tecido adiposo abdominal, após desmame de ratos desnutridos durante a lactação. MATERIAIS E MÉTODOS: Ratas lactantes submetidas a restrição alimentar (RA em 50%, de acordo com o consumo das lactantes controles (C. Após o desmame, filhotes desnutridos receberam ração contendo 19% de óleo de soja (RA-soja 19% ou óleo de canola (RA-canola 19%. Os filhotes do grupo controle receberam ração contendo 7% de óleo de soja (C-soja 7%. Aos 60 dias de idade, foram realizadas medidas corporais e das áreas de tecido adiposo abdominal por meio de tomografia computadorizada. Após sacrifício, tecido adiposo abdominal foi excisado e pesado. Os dados foram expressos como média ± erro-padrão da média, considerando o nível de significância de p OBJECTIVE: To study, by means of computed tomography, the repercussion of post-weaning dietary supplementation with soy oil or canola oil on the abdominal fat distribution in previously undernourished rats. MATERIALS AND METHODS: Dams submitted to 50% food restriction (FR compared with dams receiving a standard diet (C. After weaning, undernourished rats received a diet supplemented with 19% soy oil (19% FR-soy or 19% canola oil (19% FR-canola. Rats in the control group received a diet with 7% soy oil (7% C-soy until the end of the experimental period. At the age of 60 days old, the rats were submitted to computed tomography for evaluation of total abdominal and visceral fat area. The rats' length and body mass were evaluated and, after their sacrifice, the abdominal fat depots were excised weighted. The data are reported as mean ± mean standard error, with p < 0.05 considered as significance level. RESULTS: Rats in the group 19% FR presented similar length, body weight and visceral fat mass. As a whole, the evaluations have shower results

  13. Densitometria da vértebra dorsal, osso pleural e osso neural em tartarugas verdes hígidas por tomografia computadorizada quantitativa Densitometry of dorsal vertebrae, pleural bone and neural bone in healthy green sea turtles by quantitative computed tomography

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    Jannine Forattini de Oliveira

    2012-08-01

    Full Text Available A tomografia computadorizada quantitativa (TCQ é uma técnica com alta sensibilidade, aplicabilidade e precisão no diagnóstico de perda de massa óssea, entretanto a falta de valores de normalidade para animais silvestres limita a sua aplicação clínica. O presente estudo objetiva estabelecer valores médios de radiodensidade do osso trabecular das vértebras dorsais, osso pleural e osso neural de tartarugas marinhas juvenis hígidas utilizando a TCQ. Para isso, utilizou-se um grupo experimental de cinco animais que foram submetidos a exames de tomografia computadorizada helicoidal, sendo as mensurações da radiodensidade óssea realizadas ao nível da terceira, quarta e quinta vértebras dorsais. Os valores médios de radiodensidade do osso trabecular das vértebras dorsais, osso pleural e osso neural foram, respectivamente, de 287,4±39,1, 1093,74±100,4 e 1089,6±86,5 unidades Hounsfield (HU. Estudos complementares devem ser realizados em diferentes espécies e faixas etárias de quelônios para favorecer a aplicação clínica desta técnica.Quantitative computed tomography (QCT is a technique with high sensitivity, applicability and accuracy in the diagnosis of bone loss; however the lack of normal values for wild animals limits their clinical application. This study aims to establish medium values radiodensity trabecular bone of the dorsal vertebrae, bone pleural and neural bone in healthy juvenile sea turtles using the QTC. For this we used an experimental group of five animals that underwent helical computed tomography, and measurements of bone radiodensity conducted at the level of the third, fourth and fifth dorsal vertebrae. The medium values of radiodensity trabecular bone of the dorsal vertebrae, pleural bone, and neural bone were respectively 287.4±39.1, 1093.74±100.4, and 1089.6±86.5 Hounsfield units (HU. Further studies should be performed in different species and ages of turtles to encourage the clinical application of

  14. Estudo da drenagem linfática e eficácia da tomografia computadorizada na detecção de metástases linfonodais em pacientes clinicamente N0 com carcinoma espinocelular de boca e orofaringe Lymphatic drainage and efficiency of computed tomography in the detection of lymph node metastasis in N0 staged patients with squamous cell carcinoma of the mouth and oropharynx

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    Addah Regina da Silva Freire

    2002-03-01

    Full Text Available O exame clínico não é suficiente para avaliar, com precisão, o envolvimento linfonodal em carcinomas de boca e orofaringe. Avaliamos 21 pacientes portadores de carcinoma espinocelular de boca e orofaringe, estadiados clinicamente como N0. Em todos os pacientes foi feita tomografia computadorizada de face e pescoço, e linfocintilografia. A sensibilidade e a especificidade da tomografia computadorizada foram de 16% e 73% para o lado homolateral, e 0% e 90% para o contralateral, respectivamente. Drenagem linfática foi vista em 76,2% dos casos. A não-migração ocorreu em casos de difícil injeção do radiofármaco, como fossa amigdaliana e região retromolar. A migração bilateral ocorreu apenas em casos de soalho bucal, em que havia envolvimento da linha mediana. A partir desses resultados conclui-se que a tomografia computadorizada foi menos eficiente que o exame clínico. Porém, o tomógrafo utilizado foi o não-helicoidal e, portanto, a eficácia do tomógrafo helicoidal não foi avaliada. A linfocintilografia foi útil na avaliação de pacientes clinicamente N0 e estamos utilizando o método para avaliar linfonodo sentinela nos carcinomas de boca.Clinical examination alone is not sufficient to precisely evaluate lymph node involvement in head and neck cancer. The results of computed tomography of the neck and lymphoscintigraphy were evaluated in 21 patients with carcinoma of the mouth and oropharynx staged N0. Nine patients were treated by homolateral and 12 by bilateral neck dissection. Sensitivity and specificity of computed tomography were 16% and 73% for homolateral side and 0% and 90% for contralateral side, respectively. Lymphatic drainage was observed in 76.2% of the cases. No-migration was associated with cases involving the retromolar region and tonsillar fossa, where injection of the 99mTc-Dextran 500 is more difficult. Bilateral migration occurred only in carcinomas of the floor of the mouth, with involvement of the

  15. Sarcoma de Kaposi relacionado à síndrome da imunodeficiência adquirida: características do comprometimento hepático na tomografia computadorizada e na ressonância magnética Kaposi sarcoma related to acquired immunodeficiency syndrome: hepatic findings on computed tomography and magnetic resonance imaging

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    Daniel Nobrega da Costa

    2008-04-01

    Full Text Available Sarcoma de Kaposi é uma neoplasia associada a condições de imunossupressão que acomete os vasos linfáticos e sanguíneos. É a neoplasia intra-hepática mais comum na síndrome da imunodeficiência adquirida. A tomografia computadorizada e a ressonância magnética revelam múltiplos pequenos nódulos, proeminência e realce dos planos periportais, devido à presença de tecido neoplásico. Os autores descrevem um caso de paciente masculino, de 47 anos de idade, com síndrome da imunodeficiência adquirida e sarcoma de Kaposi disseminado.Kaposi sarcoma is a neoplasm associated with immunosuppressive conditions, and involving blood and lymphatic vessels. It is the most frequent intrahepatic neoplasm in patients with acquired immunodeficiency syndrome. Computed tomography and magnetic resonance imaging demonstrate multiple small nodules, prominence and contrast-enhancement of periportal branches due to the presence of the neoplastic tissue. The authors report a case of a 47-year-old male patient with acquired immunodeficiency syndrome presenting disseminated Kaposi sarcoma.

  16. Tomografia computadorizada como método auxiliar no diagnóstico e tratamento de lesões intra-ósseas: caso clínico de odontoma composto = Computed tomography as auxiliary method in the diagnostic and treatment of intra-osseos lesions: a case of compound odontoma

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    Paiano, Grasiela Antunes

    2006-01-01

    Full Text Available O advento da tomografia computadorizada (TC possibilita de visualização tridimensional, favorece o diagnóstico e proporcionando um tratamento mais preciso em virtude da localização exata da lesão e análise da proximidade com as estruturas anatômicas vitais relacionadas. Contudo o tratamento de lesões ósseas se torna mais segura, reduzindo o risco de lesão a dentes adjacentes e nervos. O Odontoma é considerado o tumor odontogênico que mais comumente acomete os ossos maxilares. A variante composta deste tumor apresenta a característica de muitas estruturas semelhantes a dentes envolvidas por um halo radiolúcido e grande freqüência na região anterior da maxila, porém o diagnóstico deste tumor nas demais localizações dos maxilares é pouco freqüente. Apresenta normalmente crescimento limitado e expande as corticais ósseas, porém sem tendência à recidiva. O tratamento do odontoma consiste na sua excisão cirúrgica. Os autores pretendem relatar a utilização da TC como método auxiliar no diagnóstico e tratamento de um caso de exérese de um odontoma composto na região anterior da mandíbula

  17. Padronização de um método para mensuração das tábuas ósseas vestibular e lingual dos maxilares na Tomografia Computadorizada de Feixe Cônico (Cone Beam Methodology standardization for measuring buccal and lingual alveolar bone plates using Cone Beam Computed Tomography

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    Marcos Cezar Ferreira

    2010-02-01

    Full Text Available INTRODUÇÃO: a espessura das tábuas ósseas que recobrem os dentes por vestibular e lingual constitui um dos fatores limitantes da movimentação dentária. O avanço tecnológico em Imaginologia permitiu avaliar detalhadamente essas regiões anatômicas por meio da utilização da tomografia computadorizada de feixe cônico (TCFC. OBJETIVO: descrever e padronizar, pormenorizadamente, um método para mensuração das tábuas ósseas vestibular e lingual dos maxilares nas imagens de tomografia computadorizada de feixe cônico. METODOLOGIA: a padronização digital da posição da imagem da face deve constituir o primeiro passo antes da seleção dos cortes de TCFC. Dois cortes axiais de cada maxilar foram empregados para a mensuração da espessura do osso alveolar vestibular e lingual. Utilizou-se como referência a junção cemento-esmalte dos primeiros molares permanentes, tanto na arcada superior quanto na inferior. RESULTADOS: cortes axiais paralelos ao plano palatino foram indicados para avaliação quantitativa do osso alveolar na maxila. Na arcada inferior, os cortes axiais devem ser paralelos ao plano oclusal funcional. CONCLUSÃO: o método descrito apresenta reprodutibilidade para utilização em pesquisas, assim como para a avaliação clínica das repercussões periodontais da movimentação dentária, ao permitir a comparação de imagens pré e pós-tratamento.INTRODUCTION: The thickness of the buccal and lingual bone plates constitutes one of the limiting factors of the orthodontic movement. The imaging technology has permitted the evaluation of this anatomical region, by means of cone beam computed tomography. PURPOSE: To describe and standardize, in details, a method for measuring the buccal and lingual bone plate thickness in CBCT images. METHODOLOGY: Digital standardization of face image should constitute the first step before the selection of CBCT slices. Two axial sections of each jaw were used for measuring the thickness

  18. Disgenesia do corpo caloso e más-formações associadas: achados de tomografia computadorizada e ressonância magnética Dysgenesis of the corpus callosum and associated malformations: computed tomography and magnetic resonance imaging findings

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    Cristiano Montandon

    2003-10-01

    Full Text Available O termo disgenesia do corpo caloso refere-se a uma má-formação deste com origem na embriogênese do telencéfalo. O relato analisa os achados de tomografia computadorizada e ressonância magnética em 11 pacientes com disgenesia calosa e em um caso de corpo caloso normal com lipoma associado. Esta pode ser distinguida em três grupos: agenesia total (três casos, agenesia parcial (seis casos e hipoplasia (dois casos. Anomalias associadas foram observadas em nove casos, incluindo má-formação de Chiari tipo II (um caso, esquizencefalia (um caso, cisto inter-hemisférico (dois casos, heterotopia nodular (um caso, cisto de Dandy-Walker (um caso e lipoma do corpo caloso (quatro casos. Este artigo demonstra um espectro destes distúrbios, auxiliando na sua interpretação diagnóstica.Callosal dysgenesis is a malformation of the corpus callosum with origins in the embryogenesis of the telencephalon. We reviewed the computed tomography and magnetic resonance imaging findings of 11 patients with callosal dysgenesis and one patient with normal corpus callosum associated with a lipoma. The patients were divided into three distinct groups: total agenesis (three patients, partial agenesis (six patients and hypoplasia (two patients. Associated abnormalities were observed in nine patients, including Chiari II malformation (one patient, schizencephaly (one patient, interhemispheric cyst (two patients, Dandy-Walker cyst (one patient, nodular heterotopy (one patient and lipoma of the corpus callosum (four patients. This paper presents a review that may contribute to the diagnosis of these disorders.

  19. Análise do diâmetro transverso do processo odontoide com uso da tomografia computadorizada Análisis del diámetro transverso del proceso odontoides con uso de la tomografía computarizada Analysis of the transverse diameter in the odontoid process by computerized tomography

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    Fábio Kazuo Soejima

    2010-12-01

    Full Text Available INTRODUÇÃO: o diâmetro reduzido do odontoide é um desafio para o cirurgião no planejamento pré-operatório e escolha na fixação da fratura com um ou dois parafusos. OBJETIVO: analisar a medida do diâmetro transverso (DT do processo odontoide por meio da tomografia computadorizada para o planejamento pré-operatório da osteossíntese com um ou dois parafusos. MÉTODOS: foram analisadas 79 tomografias computadorizadas cervicais de pacientes adultos, sem deformidades congênitas ou queixas de dor em coluna cervical alta, atendidos em uma clínica privada de Blumenau - Santa Catarina. RESULTADOS: as médias de idade não revelaram diferença estatisticamente significante entre os sexos, mas observou-se diferença estatisticamente significante entre as médias do DT do odontoide de homens e mulheres. A média do diâmetro transverso nos homens foi de 10,29 mm, e nas mulheres de 9,39 mm. CONCLUSÃO: a tomografia computadorizada mostrou-se útil para a medição do diâmetro transverso do processo odontoide. A fixação com um parafuso cortical de 3,5 mm seria possível em todos os casos analisados e a fixação com dois parafusos seria possível em 83,9% dos homens e 62,5% das mulheres.INTRODUCCIÓN: el diámetro reducido de la odontoides es un desafío para el cirujano en la planificación pre-operatoria y de la elección en la fijación de la fractura con uno o dos tornillos. OBJETIVO: analizar la medida del diámetro transverso (DT del proceso odontoides, por medio de la tomografía computarizada para el planeamiento pre-operatorio de la osteosíntesis con uno o dos tornillos. MÉTODOS: fueron analizadas 79 tomografías computarizadas cervicales de pacientes adultos, sin deformidades congénitas o reclamos de dolor en la columna cervical alta, atendidos en una clínica privada de Blumenau - Santa Catarina, Brasil. RESULTADOS: los promedios de edad no revelaron diferencia estadísticamente significante entre los sexos, pero se observ

  20. Esvaziamento gástrico após administração oral de contraste em tomografia computadorizada do abdômen: descrição de seis casos

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    Martins Fernando Antonio Nogueira da Cruz

    2004-01-01

    Full Text Available JUSTIFICATIVA E OBJETIVOS: A lesão pulmonar secundária à aspiração do conteúdo gástrico é complicação associada à perda dos reflexos protetores das vias aéreas. Neste contexto, a realização de exames tomográficos que incluem a contrastação do trato digestivo exige particular atenção em crianças abaixo de cinco anos, que necessitam anestesia geral ou sedação para assegurar imobilidade durante o procedimento. A indução da anestesia ou sedação, após ingestão da solução de contraste pode trazer risco substancial para a broncoaspiração do conteúdo gástrico. Isto faz com que se opte por administrar o contraste por sonda gástrica após a intubação traqueal, uma vez que não se conhece o tempo de esvaziamento gástrico após utilização de solução contrastante. Esta conduta representa aumento do tempo de anestesia, o que resulta em constante questionamento sobre a possibilidade de esvaziamento do conteúdo gástrico em tempo inferior a uma hora. Seis casos de pacientes submetidos à tomografia de abdômen foram avaliados quanto ao esvaziamento gástrico por meio da realização de cortes tomográficos na topografia do estômago, com o objetivo de determinar a presença ou ausência de conteúdo residual líquido nesse órgão, após a administração da solução de contraste. RELATO DOS CASOS: Foram avaliadas seis crianças submetidas à tomografia contrastada do abdômen. Duas, não anestesiadas, apresentaram expressivo resíduo líquido gástrico decorridos 50 e 45 minutos, respectivamente, da ingestão de contraste. Quatro, submetidas à anestesia geral, também apresentaram resíduo líquido gástrico decorridos 40 a 50 minutos da administração de contraste via sonda oro/nasogástrica. Em duas destas persistiu apreciável resíduo líquido no estômago, mesmo após a aspiração do conteúdo pela sonda. CONCLUSÕES: Nos casos observados, o período de 40 a 50 minutos foi insuficiente para o esvaziamento do

  1. Otimização da dose em exames de rotina em tomografia computadorizada: estudo de viabilidade em um Hospital Universitário Radiation dose optimization in routine computed tomography: a study of feasibility in a University Hospital

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    Juciléia Dalmazo

    2010-08-01

    Full Text Available OBJETIVO: Estudar a viabilidade de redução da dose de radiação em protocolos de aquisição de imagens de tomografia helicoidal em um hospital universitário. MATERIAIS E MÉTODOS: Foi realizado levantamento de dose de radiação de protocolos de tomografia com objetos simuladores e câmara de ionização. Foram propostas variações de kVp e mAs, determinando-se a média de ruído. Protocolos com valores de ruído menores ou iguais a 1% foram submetidos à avaliação qualitativa de contraste e resolução espacial por três observadores. RESULTADOS: Foram realizados 22 testes de variações para o protocolo de crânio pediátrico, 26 para crânio adulto, 28 para abdome e 18 para tórax. A redução da dose conseguida variou entre 7,4-13% para protocolo de crânio pediátrico, 3,8-25% para crânio adulto, 9,6-34,3% para abdome e 6,4-12% para tórax. Notou-se também que a utilização de ferramentas de janelamento e zoom favoreceu o aceite das imagens pelos observadores. CONCLUSÃO: É possível reduzir os níveis de dose de radiação em até 34,4%, comparativamente aos protocolos utilizados na rotina, mantendo-se o ruído em níveis aceitáveis. O uso de ferramentas de manipulação digital das imagens possibilitou a aceitação de imagens com níveis maiores de ruído, favorecendo o processo de redução de dose de radiação.OBJECTIVE: To study the feasibility of reducing radiation dose in protocols for acquisition of helical computed tomography images in a University Hospital. MATERIALS AND METHODS: A survey of radiation doses in computed tomography protocols was performed with phantoms and ionization chamber. Changes in kVp and mAs were proposed, determining the average noise. Protocols with noise values 1% were submitted to qualitative assessment of contrast and spatial resolution by three observers. RESULTS: Tests of variations were performed with 22 protocols for pediatric skulls, 26 for adult skulls, 28 for abdomen, and 18 for

  2. The diagnostic contribution of computed tomography in intranasal carcinoma with retrobulbar, oral and brain invasion in a canine: case report; Contribuicao da tomografia computadorizada no diagnostico de carcinoma intranasal com invasao retrobular, oral e cerebral em canino: relato de caso

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    Zardo, Karen Maciel, E-mail: kmz@bol.com.br; Belotta, Alexandra Frey; Babicsak, Viviam Rocco; Machado, Vania Maria de Vasconcelos [Universidade Estadual Paulista Julio de Mesquita Filho (FMVZ/UNESP), Botucatu, SP (Brazil). Faculdade de Medicina Veterinaria e Zootecnia. Dept. de Reproducao Animal e Radiologia Veterinaria; Zanoni, Diogo Souza; Costa, Denis Carvalho [Universidade Estadual Paulista Julio de Mesquita Filho (FMVZ/UNESP), Botucatu, SP (Brazil). Faculdade de Medicina Veterinaria e Zootecnia. Dept. de Clinica Veterinaria

    2012-07-01

    Intranasal tumors are uncommon and in most cases are malignant, aggressive and with low to moderate potential for metastasis. Clinical signs are usually caused by progressive obstruction of the upper airways. The test cytopathological also is a diagnosis method, but the definitive diagnosis is made by histopathological. Computed tomography (CT) is recommended to treatment planning. A poodle was attended at the veterinary hospital with a clinical history of epistaxis and nasal and ocular secretions, seizures and severe dyspnoea. The animal underwent to radiographic examination of the chest and skull as well as helical computed tomography of the nasal cavity and brain before and after the administration of intravenous contrast. The CT findings revealed an expansive bilateral nasal cavity neoformation, with involvement of the retrobulbar space, right frontal sinus, brain and oral cavity, suggesting a neoplastic or an infectious process. The CT examination allowed the material collection, directly from the mass, to cytological examination, providing the diagnosis of carcinoma. CT also allowed the determination of the unfavorable prognosis of the patient and the treatment planning which not included the surgical excision of the neoformation. Although CT was not conclusive in the diagnosis of carcinoma, it was essential to accurately define the extent of the lesion, to guide the collection of material directly from the tumor and to determine the prognosis of the animal, proving to be an extremely useful tool in cases of tumors intranasal in dogs. (author)

  3. Fourth ventricle computed tomography indexes: standardisation and characteristics in neurocysticercosis Índices do IV ventrículo em tomografia computadorizada de crânio: padronização e características na neurocisticercose

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    Svetlana Agapejev

    2002-06-01

    Full Text Available OBJECTIVES: to propose standardisation of fourth ventricle dimensions and to study its characteristics in neurocysticercosis. METHOD: a control group (CG constituted by 114 individuals with normal CT, and 80 patients with neurocysticercosis composed the group with neurocysticercosis (GN. Measures of the inner cranial diameter (Cr, fronto-polar distance between both lateral ventricles (FP, antero-posterior (AP and latero-lateral (LL fourth ventricle width based the standardisation of six indexes. RESULTS: AP/Cr, AP/LL and AP/FP were the more discriminative indexes, presenting in CG the mean values of 0.063, 0.267 and 0.582, respectively. The indexes in GN had values statistically higher than in CG. From GN, 51patients had increased indexes values above 2 standard deviation of the CG mean. AP/Ll was > or = 1 in 95% of patients with ventricular shunting and in 88% with depression. It also occurred in 73% patients with satisfactory follow-up and in everybody who died. CONCLUSION: AP/Cr, AP/LL and AP/FP may represent fourth ventricle dimensions.OBJETIVOS: propor padrão de normalidade das dimensões do IVventrículo e estudar suas características em neurocisticercose. MÉTODO: em um grupo controle (GC constituído de 114 indivíduos com tomografias normais e em outro grupo composto de 80 doentes com neurocisticercose (GN, mediram-se a distância fronto-polar de ventrículos laterais (FP e os diâmetros craniano interno (Cr, ântero-posterior (AP e látero-lateral (LL do IVº ventrículo para a padronização de seis índices. RESULTADOS: AP/Cr, AP/LL e AP/FP foram os índices mais discriminatórios e apresentaram, em GC, valores médios de 0,063, 0,267 e 0,582, respectivamente. Em GN os valores foram estatisticamente superiores a GC. Selecionaram-se 51 doentes do GN com índices > ou = 2 desvios-padrão da média em GC. Neles, AP/Ll foi > ou = 1 em 95% doentes com derivação liquórica e em 88% com depressão, ocorrendo em 73% com evolu

  4. Morfologia alveolar sob a perspectiva da tomografia computadorizada: definindo os limites biológicos para a movimentação dentária Alveolar bone morphology under the perspective of the computed tomography: defining the biological limits of tooth movement

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    Daniela Gamba Garib

    2010-10-01

    Full Text Available INTRODUÇÃO: a tomografia computadorizada (TC permite a visualização do osso alveolar que recobre os dentes por vestibular e lingual. OBJETIVO: o propósito deste estudo foi expor e discutir as implicações da morfologia do osso alveolar, visualizado por meio da TC, sobre o diagnóstico e plano de tratamento ortodôntico. MÉTODOS: foram descritas as evidências sobre a inter-relação entre características dentofaciais e a morfologia das tábuas ósseas vestibular e lingual, assim como evidências sobre a repercussão da movimentação ortodôntica sobre o nível e espessura dessas estruturas periodontais. RESULTADOS: pacientes adultos podem apresentar deiscências ósseas previamente ao tratamento ortodôntico, principalmente na região dos incisivos inferiores. Os pacientes com padrão de crescimento vertical parecem apresentar menor espessura das tábuas ósseas vestibular e lingual no nível do ápice dos dentes permanentes, comparados a pacientes com padrão de crescimento horizontal. O movimento dentário vestibulolingual descentraliza os dentes do rebordo alveolar e ocasiona deiscências ósseas. CONCLUSÃO: a morfologia do rebordo alveolar constitui um fator limitante para a movimentação dentária e deve ser considerada, de forma individual, na realização do plano de tratamento ortodôntico.INTRODUCTION: Computed tomography (CT permits the visualization of the labial/buccal and lingual alveolar bone. OBJECTIVES: This study aimed at reporting and discussing the implications of alveolar bone morphology, visualized by means of CT, on the diagnosis and orthodontic treatment plan. METHODS: Evidences of the interrelationship between dentofacial features and labial/buccal and lingual alveolar bone morphology, as well as the evidences of the effects of the orthodontic movement on the thickness and level of these periodontal structures were described. RESULTS: Adult patients may present bone dehiscences previously to orthodontic

  5. Efeitos transversais da expansão rápida da maxila em pacientes com má oclusão de Classe II: avaliação por Tomografia Computadorizada Cone-Beam Transverse effects of rapid maxillary expansion in Class II malocclusion patients: a Cone-Beam Computed Tomography study

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    Carolina Baratieri

    2010-10-01

    Full Text Available OBJETIVO: avaliar por meio de Tomografia Computadorizada Cone-Beam (TCCB os efeitos transversais, imediatos e após o período de contenção, da expansão rápida da maxila (ERM em pacientes com má oclusão de Classe II. MÉTODOS: dezessete crianças (idade inicial média de 10,36 anos com má oclusão de Classe II e deficiência transversal esquelética da maxila foram submetidas ao protocolo de ERM com aparelho expansor de Haas. TCCBs foram realizadas antes dos procedimentos clínicos (T1, imediatamente após a estabilização do parafuso expansor (T2 e após completados 6 meses de contenção e removido o aparelho (T3. Com o software Dolphin, foram possíveis a manipulação das imagens e as mensurações. O teste t de Student pareado foi utilizado para identificar significância estatística (pOBJECTIVE: The aim of this study was to evaluate by Cone-Beam Computed Tomography (CBCT transversal responses, immediately and after the retention period, to rapid maxillary expansion (RME, in Class II malocclusion patients. METHODS: Seventeen children (mean initial age of 10.36 years, with Class II malocclusion and skeletal constricted maxilla, underwent Haas´ protocol for RME. CBCT scans were taken before treatment (T1, at the end of the active expansion phase (T2 and after the retention period of six months (T3. The scans were managed in Dolphin software, where landmarks were marked and measured, on a coronal slice passing through the upper first molar. The paired Student´s t-test was used to identify significant differences (p<0.05 between T2 and T1, T3 and T2, and T3 and T1. RESULTS: Immediately after RME, the mean increase in maxillary basal, alveolar and dental width was 1.95 mm, 4.30 mm and 6.89 mm, respectively. This was accompanied by buccal inclination of the right (7.31° and left (6.46° first molars. At the end of the retention period, the entire transverse dimension increased was maintained and the dentoalveolar inclination resumed

  6. Central nervous system abnormalities on midline facial defects with hypertelorism detected by magnetic resonance image and computed tomography Anomalias de sistema nervoso central em defeitos de linha média facial com hipertelorismo detectados por ressonância magnética e tomografia computadorizada

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    Vera Lúcia Gil-da-Silva-Lopes

    2006-12-01

    Full Text Available The aim of this study were to describe and to compare structural central nervous system (CNS anomalies detected by magnetic resonance image (MRI and computed tomography (CT in individuals affected by midline facial defects with hypertelorism (MFDH isolated or associated with multiple congenital anomalies (MCA. The investigation protocol included dysmorphological examination, skull and facial X-rays, brain CT and/or MRI. We studied 24 individuals, 12 of them had an isolated form (Group I and the others, MCA with unknown etiology (Group II. There was no significative difference between Group I and II and the results are presented in set. In addition to the several CNS anomalies previously described, MRI (n=18 was useful for detection of neuronal migration errors. These data suggested that structural CNS anomalies and MFDH seem to have an intrinsic embryological relationship, which should be taken in account during the clinical follow-up.Este estudo objetivou descrever e comparar as anomalias estruturais do sistema nervoso central (SNC detectadas por meio de ressonância magnética (RM e tomografia computadorizada (TC de crânio em indivíduos com defeitos de linha média facial com hipertelorismo (DLMFH isolados ou associados a anomalias congênitas múltiplas (ACM. O protocolo de investigação incluiu exame dismorfológico, RX de crânio e face, CT e RM de crânio. Foram estudados 24 indivíduos, sendo que 12 apresentavam a forma isolada (Grupo I e os demais, DLMFH com ACM de etiologia não esclarecida (Grupo II. Não houve diferença entre os dois grupos e os resultados foram agrupados. Além de várias anomalias de SNC já descritas, a RM foi útil para detecção de erros de migração neuronal. Os dados sugerem que as alterações estruturais de SNC e os DLMFH têm relação embriológica, o que deve ser levado em conta durante o seguimento clínico.

  7. Auxílio da tomografia computadorizada no planejamento pré-operatório de pacientes portadores de escoliose idiopática do adolescente Auxilio de la tomografía computarizada en el plan preoperatorio de pacientes portadores de escoliosis idiopática del adolescente Computed tomography aid in preoperative planning of patients with adolescent idiopathic scoliosis

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    Rodrigo Rezende

    2010-03-01

    Full Text Available A escoliose idiopática do adolescente (EIA é uma doença diagnosticada no início da puberdade. Ela apresenta etiologia indefinida e caracteriza-se pelo desvio lateral da coluna vertebral maior que 10°, associado à rotação do corpo vertebral. O uso de instrumentação de terceira geração produziu um melhor resultado na correção da curva do que as técnicas anteriores. Porém, ainda existem dificuldades técnicas no momento da passagem e da escolha dos parafusos pediculares, devido à angulação e ao diâmetro dos pedículos vertebrais. Apesar de apresentar vantagens, essa técnica não é isenta de riscos e complicações, necessitando de uma maior curva de aprendizado pelo médico-cirurgião, bem como de um adequado planejamento pré-operatório. Até o momento, não há na literatura relato sobre a utilização da tomografia computadorizada no auxílio do planejamento cirúrgico de pacientes com escoliose. Diante do exposto, objetivamos, no presente estudo, descrever uma técnica de planejamento pré-operatório, com o auxílio da tomografia computadorizada para a fixação da coluna em pacientes com escoliose idiopática do adolescente, especificando a angulação e o diâmetro dos pedículos vertebrais, o que poderá auxiliar o médico-cirurgião no momento da fixação.La escoliosis idiopática en el adolescente (EIA es una enfermedad diagnosticada en el inicio de la pubertad. Esta presenta una etiología indefinida y es caracterizada por el desvío lateral de la columna vertebral por encima de los diez grados asociados a la rotación del cuerpo vertebral. El uso de instrumentación de tercera generación produjo un mejor resultado en la corrección de la curva comparado con las técnicas anteriores. Sin embargo, existen dificultades técnicas en el momento del paso y de escoger los tornillos pediculares debido a la angulación y al diámetro de los pedículos vertebrales. A pesar de presentar ventajas, esta técnica no est

  8. Tomografia computadorizada da coluna lombar após artrodese com emprego de material metálico: avaliação da qualidade da imagem para diferentes algoritmos matemáticos Lumbar spine computed tomography after arthrodesis with metal implant: a qualitative evaluation of images reconstructed with different mathematical algorithms

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    José Augusto Marconato

    2007-02-01

    Full Text Available OBJETIVO: Selecionar os melhores algoritmos para o exame de coluna lombar na avaliação de artrodese com material metálico. MATERIAIS E MÉTODOS: Utilizou-se um equipamento de tomografia computadorizada de 16 fileiras de detectores. Imagens de dez pacientes foram reconstruídas com filtros 20, 40, 60 e 80 e realizadas reformatações em três dimensões e multiplanares com espessuras de 2 mm e 4 mm. Um total de 320 imagens foi avaliado por três experientes radiologistas, que deram notas de 1 a 5 (1 = não-aceitável; 2 = abaixo dos padrões; 3 = aceitável; 4 = acima da média; 5 = excelente. Além disso, foram realizadas medidas de ruído para correlação com o tipo de filtro utilizado. RESULTADOS: As médias do valor de ruído para reconstrução com 2 mm e filtros 20, 40, 60 e 80 foram de 24,7 ± 4,3; 35,5 ± 4,2; 106,0 ± 18,5 e 145,9 ± 26,9, respectivamente, e para 4 mm foram de 18,1 ± 2,4; 25,1 ± 4,6; 76,7 ± 17,2 e 106,6 ± 23,4. CONCLUSÃO: As imagens coloridas em três dimensões são mais bem visualizadas com filtro 20, entretanto, nas imagens em tons de cinza um filtro intermediário de 40 ou 60 pode ser útil para demonstrar os parafusos com maior detalhe. Para reconstruções multiplanares com espessura de 2 mm o filtro 40 é mais bem aceito, e para uma espessura de 4 mm um filtro 60 apresentou melhor qualidade.OBJECTIVE: To select the best mathematical algorithms for lumbar spine imaging studies to assess arthrodesis with metal implant. MATERIALS E METHODS: The images acquisition was performed with a multidetector (16 rows CT scanner, and 2 mm and 4 mm slice thickness. Images of ten patients were reconstructed with filters 20, 40, 60 and 80, employing multiplanar three-dimensional volume-rendering techniques. A total of 320 images were evaluated by three experienced radiologists who rated the images from 1 to 5 (1 = unacceptable; 2 = substandard; 3 = acceptable; 4 = above the average; 5 = excellent. Additionally, noise

  9. Tomografia computadorizada de alta resolução na silicose: correlação com radiografia e testes de função pulmonar High-resolution computed tomography in silicosis: correlation with chest radiography and pulmonary function tests

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    Agnaldo José Lopes

    2008-05-01

    Full Text Available OBJETIVO: Correlacionar os parâmetros tomográficos com os de função pulmonar em portadores de silicose, bem como comparar os resultados da tomografia computadorizada de alta resolução (TCAR com os da radiografia de tórax. MÉTODOS: Foi realizado um estudo de corte transversal, em que foram avaliados 44 pacientes não-tabagistas e sem história pregressa de tuberculose. As radiografias foram classificadas de acordo com a proposta da Organização Internacional do Trabalho. Utilizando um sistema de escore semiquantitativo, os seguintes achados na TCAR foram quantificados: extensão total do envolvimento pulmonar, opacidades parenquimatosas e enfisema. Foram realizados espirometria, oscilações forçadas, avaliação dos volumes pulmonares pela técnica de diluição com hélio e medida da diffusing capacity of the lung for carbon monoxide (DLCO, capacidade de difusão do monóxido de carbono. RESULTADOS: Dos 44 pacientes estudados, 41 eram homens, com média de idade de 48,4 anos. Na análise comparativa, 4 pacientes classificados na categoria 0 pela radiografia foram reclassificados na categoria 1 pela TCAR e, enquanto a radiografia diagnosticou 23 casos de fibrose maciça progressiva, a TCAR estabeleceu esse diagnóstico em 33 doentes. Para o escore de opacidades, as maiores correlações foram observadas com as medidas de fluxo, DLCO e complacência. Já o enfisema correlacionou-se negativamente com as medidas de volume, DLCO e fluxo. Nesta amostra com predomínio de grandes opacidades (75% dos indivíduos, a deterioração da função pulmonar associou-se com a extensão das alterações estruturais. CONCLUSÕES: Na silicose, a TCAR é superior à radiografia tanto na detecção precoce da doença quanto na identificação de fibrose maciça progressiva.OBJECTIVE: To correlate tomographic findings with pulmonary function findings, as well as to compare chest X-ray findings with high resolution computed tomography (HRCT findings, in

  10. Medidas lineares dos estágios de desenvolvimento da dentição permanente humana usando Tomografia Computadorizada de Feixe Cônico: um estudo preliminar Linear measurements of human permanent dental development stages using Cone-Beam Computed Tomography: a preliminary study

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    Carlos Estrela

    2010-10-01

    Full Text Available OBJETIVO: determinar as medidas lineares dos estágios de desenvolvimento da dentição permanente humana, usando tomografia computadorizada de feixe cônico (TCFC. MÉTODOS: este estudo foi desenvolvido a partir de bancos de dados de clínicas radiológicas privadas, envolvendo 18 pacientes (13 do sexo masculino, 5 do sexo feminino, com idades variando entre 3 e 20 anos. As imagens das TCFC foram obtidas por meio do sistema i-CAT e medidas com uma função específica do programa desse mesmo sistema. Duzentos e trinta e oito dentes foram analisados, em diferentes estágios de desenvolvimento, nos planos coronal e sagital. O método foi baseado na delimitação e mensuração das distâncias entre pontos anatômicos correspondentes ao desenvolvimento das coroas e raízes dentárias. A partir dos valores obtidos, pôde-se desenvolver um modelo quantitativo para se avaliar os estágios inicial e final de desenvolvimento para todos os grupos dentários. RESULTADOS E CONCLUSÕES: as medidas obtidas dos diferentes grupos dentários estão de acordo com as estimativas das investigações publicadas previamente. As imagens por TCFC dos diferentes estágios de desenvolvimento podem contribuir no diagnóstico, planejamento e resultado dos tratamentos em diversas especialidades odontológicas. As dimensões das coroas e das raízes dentárias podem ter importantes aplicações clínicas e em pesquisas, constituindo uma técnica não invasiva que contribui com estudos in vivo. Entretanto, mais estudos são recomendados a fim de minimizar possíveis variáveis metodológicas.OBJECTIVE: To determine the linear measurements of human permanent dentition development stages using Cone-Beam Computed Tomography. METHODS: This study was based on databases of private radiology clinics involving 18 patients (13 male and 5 female, with age ranging from 3 to 20 years. Cone-Beam Computed Tomography (CBCT images were acquired with i-CAT system and measured with a

  11. Reprodutibilidade das mensurações da espessura das tábuas ósseas na tomografia computadorizada Cone-Beam utilizando diferentes protocolos de aquisição de imagem Reproducibility of bone plate thickness measurements with Cone-Beam Computed Tomography using different image acquisition protocols

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    Carolina Carmo de Menezes

    2010-10-01

    Full Text Available INTRODUÇÃO: quanto menor a dimensão do voxel, maior a nitidez da imagem de tomografia computadorizada Cone-Beam (TCCB, porém, maior a dose de radiação emitida. OBJETIVOS: avaliar e comparar a reprodutibilidade da mensuração da espessura das tábuas ósseas vestibular e lingual em imagens de TCCB, utilizando diferentes protocolos de aquisição de imagem com variação da dimensão do voxel. MÉTODOS: exames de TCCB foram tomados de 12 mandíbulas humanas secas, com dimensão do voxel de 0,2; 0,3 e 0,4mm, no aparelho i-CAT Cone-Beam 3-D Dental Imaging System. No software i-CAT Viewer, foi mensurada a espessura das tábuas ósseas vestibular e lingual, em um corte axial passando 12mm acima do forame mentoniano do lado direito. A reprodutibilidade intraexaminador foi avaliada por meio da aplicação do teste t pareado. Para a comparação interexaminadores, foi utilizado o teste t independente. Os resultados foram considerados com o nível de significância de 5%. RESULTADOS: observou-se uma excelente reprodutibilidade interexaminadores para os três protocolos avaliados. A reprodutibilidade intraexaminadores foi muito boa, com exceção de algumas regiões dos dentes anteriores, que mostraram diferenças estatisticamente significativas, independentemente da dimensão do voxel. CONCLUSÃO: a mensuração da espessura das tábuas ósseas vestibular e lingual em imagens de TCCB mostrou boa precisão para exames obtidos com voxel de 0,2; 0,3 ou 0,4mm. A reprodutibilidade das mensurações na região anterior da mandíbula foi mais crítica do que na região posterior.INTRODUCTION: A smaller voxel dimension leads to greater resolution of Cone-Beam Computed Tomography (CBCT, but a greater dosage of radiation is emitted. OBJECTIVE: Assess and compare the reproducibility of buccal and lingual bone plate thickness measurements in CBCT images using different image acquisition protocols, with variations in the voxel dimension. METHODS: CBCT exams

  12. Opacidades em vidro fosco nas doenças pulmonares difusas: correlação da tomografia computadorizada de alta resolução com a anatomopatologia Ground-glass opacity in diffuse lung diseases: high-resolution computed tomography-pathology correlation

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    Maria Lúcia de Oliveira Santos

    2003-12-01

    Full Text Available Opacidade em vidro fosco é achado freqüentemente visto na tomografia computadorizada de alta resolução do tórax e se traduz pelo aumento do coeficiente de atenuação dos pulmões, mas sem apagar as marcas broncovasculares. Por sua inespecificidade, a associação com outros achados radiológicos, clínicos e anatomopatológicos deve ser considerada para uma interpretação diagnóstica mais correta. Neste trabalho foram analisados 62 exames tomográficos de pacientes com doenças pulmonares difusas, de 14 etiologias diferentes, em que opacidades em vidro fosco foram o achado único ou predominante, e feita correlação anatomopatológica por meio de biópsias ou necropsias. Na pneumocistose as opacidades em vidro fosco corresponderam, histologicamente, à ocupação alveolar por material espumoso contendo parasitos; no carcinoma bronquíolo-alveolar, a espessamento dos septos alveolares e ocupação de sua luz por muco e células tumorais; na paracoccidioidomicose, a espessamento dos septos alveolares, áreas de fibrose e alvéolos contendo exsudato broncopneumônico; na sarcoidose, a fibrose ou a acúmulo de granulomas; na fibrose pulmonar idiopática, a espessamento dos septos alveolares por fibrose; na bronquiolite obliterante com pneumonia em organização, a pneumonia intersticial com áreas de organização intra-alveolar. A ocupação alveolar por sangue foi observada nos casos de leptospirose, hemossiderose idiopática, metástases de tumor renal e na aspergilose invasiva; por vacúolos de gordura na pneumonia lipídica; por material protéico e lipoprotéico na silicoproteinose e na proteinose alveolar; e por líquido de edema na insuficiência cardíaca congestiva.Ground-glass opacity is a finding frequently seen in high-resolution computed tomography examinations of the chest and is characterized by hazy increased attenuation of lung, however without blurring of bronchial and vascular margins. Due to its unspecificity

  13. Estudo de caso de oferta induzindo a demanda: o caso da oferta de exames de imagem (tomografia axial computadorizada e ressonância magnética na Unimed-Manaus Case study of supply induced demand: the case of provision of imaging scans (computed tomography and magnetic resonance at Unimed-Manaus

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    Edson de Oliveira Andrade

    2011-04-01

    Full Text Available OBJETIVO: Apresentar a experiência de uma operadora de plano de saúde (Unimed-Manaus na cidade de Manaus, Estado do Amazonas, com o credenciamento de serviços de imagem e a indução de demanda pela oferta dos novos serviços (Lei de Roemer. MÉTODOS: Trata-se de uma pesquisa de caráter retrospectivo, com estudo de série temporal, abordando o período de janeiro de 1998 a junho de 2004, lapso de tempo em que ocorreu a implantação dos serviços de tomografia computadorizada e da ressonância magnética no âmbito dos serviços oferecidos por aquele plano de saúde. A análise estatística consistiu em uma parte descritiva e uma inferencial, sendo esta última utilizando teste paramétrico de média (teste t de Student e ANOVA e o teste de correlação de Pearson. Foi adotado um alfa de 5% e um intervalo de confiança de 95%. RESULTADOS: Foi possível identificar na Unimed-Manaus que a oferta de novos serviços de imagem foi capaz de, por si só, gerar um aumento da demanda do serviço caracterizando o fenômeno descrito por Roemer. CONCLUSÃO: Os resultados deste trabalho ressaltam a necessidade de se estar atento ao fato de que a oferta de novos serviços no setor da saúde poderá acarretar, por si só, um aumento de sua utilização sem que haja uma demanda real.OBJECTIVE: To present the experience of a health plan operator (Unimed-Manaus in Manaus, Amazonas, Brazil, with the accreditation of imaging services and the demand induced by the supply of new services (Roemer's Law. METHODS: This is a retrospective work studying a time series covering the period from January 1998 to June 2004, in which the computed tomography and the magnetic resonance imaging services were implemented as part of the services offered by that health plan operator. Statistical analysis consisted of a descriptive and an inferential part, with the latter using a mean parametric test (Student T-test and ANOVA and the Pearson correlation test. A 5% alpha and a 95

  14. Avaliação por tomografia computadorizada helicoidal dos efeitos da expansão rápida da maxila no posicionamento condilar em pacientes com mordida cruzada posterior funcional Evaluation with helicoidal computed tomography of rapid maxillary expansion effects in the condylar position of patients with functional posterior crossbite

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    Edgard Norões Rodrigues da Matta

    2009-10-01

    Full Text Available OBJETIVO: este estudo clínico avaliou, por meio da tomografia computadorizada helicoidal, os efeitos da expansão rápida da maxila no posicionamento condilar de pacientes com mordida cruzada posterior funcional na fase da dentadura mista. MÉTODOS: dez pacientes com faixa etária entre os 7 anos e 2 meses e os 11 anos e 2 meses - apresentando mordida cruzada posterior funcional, com desvio da linha média de pelo menos 2,5mm para o lado do cruzamento - foram tratados com expansão rápida da maxila. Após a obtenção de cortes tomográficos sagitais da articulação temporomandibular, as medidas dos espaços articulares anterior, posterior e superior foram realizadas e o posicionamento relativo do côndilo foi calculado. Utilizando-se cortes tomográficos axiais, avaliou-se o posicionamento anteroposterior e transversal dos côndilos em relação às estruturas da base craniana. RESULTADOS: foram identificadas diferenças significativas, antes do tratamento, entre os espaços articulares posteriores, na posição relativa do côndilo e um posicionamento mais anterior e mais próximo ao plano sagital mediano do côndilo do lado não-cruzado. Após o tratamento, não foram evidenciadas diferenças significativas nessas medidas. CONCLUSÕES: após a expansão rápida da maxila, um posicionamento mais centralizado dos côndilos nas fossas articulares foi observado, além de uma maior simetria anteroposterior e transversal entre os mesmos.AIM: This clinical study evaluated, through helicoidal computed tomography (CT, the effects of rapid maxillary expansion in the condylar position of patients with functional posterior crossbite in mixed dentition stage. METHODS: Ten patients aged between 7 years and 2 months and 11 years and 2 months were selected. This patients which presented functional unilateral posterior crossbite with mandibular midline deviation of at least 2.5mm to the crossbite side were submitted to rapid maxillary expansion. After

  15. Alterações dimensionais do côndilo mandibular em indivíduos de 3 a 20 anos de idade usando tomografia computadorizada de feixe cônico: um estudo preliminar Mandibular condyle dimensional changes in subjects from 3 to 20 years of age using Cone-Beam Computed Tomography: a preliminary study

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    José Valladares Neto

    2010-10-01

    Full Text Available INTRODUÇÃO: o exame de tomografia computadorizada de feixe cônico (TCFC oferece excelente representação dos tecidos duros da articulação temporomandibular (ATM. OBJETIVO: investigar as alterações morfológicas do côndilo mandibular, da infância à idade adulta, utilizando a TCFC. MÉTODOS: um estudo transversal foi conduzido envolvendo 36 côndilos de 18 indivíduos com idades variando entre 3 e 20 anos. As imagens dos côndilos foram obtidas por meio do sistema i-CAT e medidas com uma ferramenta do programa específica para ATM, que permite cortes perpendiculares à cabeça do côndilo, com correção individual em função das diferenças angulares de cada um. As maiores distâncias nas vistas lateral e frontal foram consideradas tanto para os côndilos do lado direto como para os do lado esquerdo. RESULTADOS: a dimensão lateral do côndilo mandibular parece ser estabelecida de maneira precoce, sofrendo poucas alterações com o passar dos anos, enquanto a dimensão frontal tende a aumentar. Assimetrias entre o côndilo esquerdo e o direito foram comumente observadas; no entanto, tais diferenças não apresentaram significância estatística para as vistas lateral (P=0,815 e frontal (P=0,374. CONCLUSÕES: os côndilos apresentaram simetria com relação ao tamanho, sendo observado crescimento apenas na dimensão frontal Os resultados sugerem que a TCFC constitui-se numa ferramenta útil na mensuração e avaliação das dimensões condilares.INTRODUCTION: Cone-Beam Computed Tomography (CBCT imaging provides an excellent representation of the temporomandibular joint bone tissues. OBJECTIVE: The aim of this study was to investigate morphological changes of the mandibular condyle from childhood to adulthood using CBCT. METHODS: A cross-sectional study was conducted in 36 condyles of 18 subjects from 3 to 20 years of age. Condyles were scanned with the i-CAT Cone-Beam 3D imaging system and linear dimensions were measured with a

  16. Avaliação de doses referenciais obtidas com exames de tomografia computadorizada de feixe cônico adquiridos com diferentes tamanhos de voxel Evaluation of referential dosages obtained by Cone-Beam Computed Tomography examinations acquired with different voxel sizes

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    Marianna Guanaes Gomes Torres

    2010-10-01

    Full Text Available OBJETIVO: o objetivo deste estudo reside na avaliação do produto dose-área (DAP e das doses de entrada na pele (DEP, empregando protocolos com tamanho de voxel diferente, obtidos com o aparelho de Tomografia Computadorizada de Feixe Cônico (TCFC i-CAT, a fim de determinar melhores parâmetros baseados nos princípios da radioproteção. MÉTODOS: para medição do DEP foi utilizada uma câmara de ionização do tipo lápis, e para o DAP foi utilizado um aparelho PTW. Quatro protocolos foram testados, a saber: (1 40 seg., voxel de 0,2mm e 46,72mAs; (2 40 seg., voxel de 0,25mm e 46,72mAs; (3 20 seg., voxel de 0,3mm e 23,87mAs; (4 20 seg., voxel de 0,4mm e 23,87mAs. A quilovoltagem permaneceu constante (120KVp. RESULTADOS: detectou-se diferença estatisticamente significativa (pObjectives: The aim of this study was to evaluate the dose-area product (DAP and the entrance skin dose (ESD, using protocols with different voxel sizes, obtained with i-CAT Cone-Beam Computed Tomography (CBCT, to determine the best parameters based on radioprotection principles. METHODS: A pencil-type ionization chamber was used to measure the ESD and a PTW device was used to measure the DAP. Four protocols were tested: (1 40s, 0.2 mm voxel and 46.72 mAs; (2 40s, 0.25 mm voxel and 46.72 mAs; (3 20s, 0.3 mm voxel and 23.87 mAs; (4 20s, 0.4 mm voxel and 23.87 mAs. The kilovoltage remained constant (120kVp. RESULTS: A significant statistical difference (p<0.001 was found among the four protocols for both methods of radiation dosage evaluation (DAP and ESD. For DAP evaluation, protocols 2 and 3 presented a statistically significant difference, and it was not possible to detect which of the protocols for ESD evaluation promoted this result. CONCLUSIONS: DAP and ESD are evaluation methods for radiation dose for Cone-Beam Computed Tomography, and more studies are necessary to explain such result. The voxel size alone does not affect the radiation dose in CBCT (i

  17. Tomografia computadorizada na avaliação tardia do tratamento cirúrgico da conexão anômala total de veias pulmonares Computed tomography in late evaluation of surgical treatment of pulmonary veins total anomalous connection

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    Ulisses Alexandre Croti

    2011-12-01

    Full Text Available OBJETIVO: Verificar se os achados da tomografia computadorizada de múltiplos detectores (TCMD apresentam associação com os parâmetros clínicos e exames complementares rotineiramente empregados na avaliação tardia das crianças submetidas ao tratamento cirúrgico da conexão anômala total de veias pulmonares (CATVP. MÉTODOS: No período de janeiro 2002 a dezembro de 2007, 12 pacientes operados de CATVP foram avaliados tardiamente com anamnese, exame físico, radiografia de tórax, eletrocardiograma, ecocardiograma e TCMD. Alterações específicas de cada um desses exames foram identificadas e comparadas com os achados qualitativos da TCMD. RESULTADOS: Onze pacientes estavam em classe funcional I (NYHA, três apresentavam sopros inespecíficos, três estavam abaixo do percentil 15 de desenvolvimento pôndero-estatural. À radiografia de tórax, dois pacientes tinham alteração dos campos pulmonares e três, aumento discreto da área cardíaca. Ao eletrocardiograma, um paciente apresentava sobrecarga ventricular direita e um, ritmo juncional. Todos os ecocardiogramas mostraram-se dentro dos limites de normalidade, exceto em um paciente com estenose entre a veia cava superior e o átrio direito. A TCMD foi totalmente normal em quatro pacientes, em três demonstrou compressão de veias pulmonares e em quatro, redução de calibre considerada significativa, as quais se correlacionaram com os demais achados. Assim, a TCMD para demonstrar alterações anatômicas, quando comparadas a alterações do exame físico ou outros exames complementares testados, apresentou sensibilidade de 87,5%, especificidade de 75%, valor preditivo positivo 87,5%, valor preditivo negativo de 75% e acurácia de 83,3%. CONCLUSÃO: No acompanhamento tardio dos pacientes submetidos à correção cirúrgica de CATVP, a TCMD pode fornecer subsídios valiosos e complementar o diagnóstico de eventuais alterações anatômicas e funcionais.OBJECTIVE: To evaluate if the

  18. Forma tumoral da cisticercose cerebral: diagnostico pela tomografia computadorizada

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    Milton K. Shibata

    1980-12-01

    Full Text Available A TC permitiu identificar a forma tumoral da cisticercose cerebral em 6 pacientes, durante investigação para esclarecimento de síndromes convulsivas. As alterações angiográficas eram mínimas. As imagens tomográficas, por sua vez, não forneceram dados que permitissem o diagnóstico diferencial com neoplasias cerebrais. O exame do LCR também não contribuiu para estabelecer o diagnóstico etiológico, que só foi firmado após a extirpação da lesão.

  19. Considerações sobre eficiência administrativa relacionado aos exames de ultra-sonografia, tomografia computadorizada e ressonância magnética nas afecções orbitárias Reasons for the administrative efficiency related to ultrassonography, computed tomography and magnetic resonance imaging tests in orbital diseases

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    Magno Watanabe

    2007-12-01

    Full Text Available OBJETIVOS: Enfocar os exames de ultra-sonografia (US, tomografia computadorizada (TC e ressonância magnética (RM, levantando, revisando e discutindo as seguintes medidas na melhoria da eficiência destes procedimentos na órbita: 1- Defasagem dos honorários médicos; 2- Vantagens e desvantagens dos exames; 3- Diretrizes clínicas. MÉTODOS: No período de julho de 2002 a março de 2003, realizou-se um levantamento dos valores dos exames orbitários de US, TC e RM pagos pelo Sistema Único de Saúde - SUS, operadoras de planos e seguros de saúde e particulares cobrados em três clínicas oftalmológicas e três clínicas radiológicas referenciadas. Pesquisa bibliográfica e revisão na literatura dos referidos exames e suas diretrizes clínicas nas afecções orbitárias. RESULTADOS: 1- Valores dos exames em reais (R$: US: 9,05 - SUS / 81,77 - AMB 90 / 57,01 - AMB/CIEFAS 93 / 102,00 - AMB/LPM 99 / 158,33 - particular. TC: 86,76 - SUS / 193,70 - AMB 90 / 196,30 - AMB/CIEFAS 93 / 204,12 - AMB/LPM 99 / 255,33 - particular. RM: 268,75 - SUS / 475,80 - AMB 90 e AMB/CIEFAS 93 / 472,50 - AMB/LPM 99 / 563,33 - particular; 2- Vantagens e desvantagens dos exames descritos de acordo com a revisão da literatura; 3- As doenças da órbita não têm ainda listadas suas diretrizes. CONCLUSÃO: Estes exames são os mais utilizados e consagrados pela sua eficácia no estudo da órbita. Para uma maior eficiência, devemos considerar as seguintes recomendações administrativas: 1- Modernização e atualização das tabelas de honorários com índices mínimos e mais justos na remuneração dos exames com reembolso dos insumos utilizados como filmes radiológicos e contrastes: 2- Promover e estimular a educação médica continuada, evitando o excesso de exames desnecessários ou inapropriados: 3- Elaboração e implementação de diretrizes e protocolos clínicos baseados em evidências nas principais doenças orbitárias que possam ser utilizados como refer

  20. Study of the positivity of spontaneous and directed diagnosis of leukoaraiosis in the elderly by cranial computerized tomography, and its correlation with cognitive defi cit and cardiovascular risk factors Estudo da positividade do diagnóstico espontâneo e dirigido da leucoaraiose em idosos pela tomografia computadorizada de crânio e sua correlação com déficits cognitivos e fatores de risco cardiovascular

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    Mauricio de Miranda Ventura

    2007-12-01

    Full Text Available OBJECTIVE: To evaluate the prevalence of leukoaraiosis (LA and its correlation with vascular risk factors and the cognitive performance of elderly patients. METHOD: 78 patients were randomly selected and submitted to clinic-laboratorial evaluation for vascular risk factors. Two cognitive tests were performed. All patients were submitted to cranial computerized tomography (CT, which was analyzed in two situations: the spontaneous and the directed way. RESULTS: There was no statistically significant difference between the prevalence of spontaneous and the directed diagnoses of LA (20.5 and 18%, respectively. The presence of LA was not significantly correlated with cognitive impairment. Only age was positively associated with LA. CONCLUSION: Cranial CT is a trustworthy method for the diagnosis of LA. Only age showed a positive association. No clinical implications were found, concerning the cognitive performance of the patients.OBJETIVO: Avaliar a prevalência da leucoaraiose (LA em idosos e correlacioná-los com fatores de risco vasculares e seu desempenho cognitivo. MÉTODO: 78 pacientes foram selecionados aleatoriamente e submetidos a avaliação clinico-laboratorial para fatores de risco vascular. Dois testes cognitivos foram realizados. Todos os pacientes foram submetidos a tomografia computadorizada (TC de crânio, que foi analisada em duas situações: de forma espontânea e dirigida. RESULTADOS: Não houve diferença estatisticamente significativa entre as formas de diagnóstico espontâneo e dirigido da LA (20,5 and 18%, respectivamente. Com relação ao desempenho cognitivo, a presença da LA não determinou prejuízo significativo. Somente a idade mostrou associação positiva com a LA. CONCLUSÃO: A TC de crânio é um método confiável para o diagnóstico de LA. A idade foi o único fator de risco que mostrou associação positiva. Não houve prejuízo quanto ao desempenho cognitivo.

  1. Avaliação pulmonar em crianças portadoras de cardiopatia congênita acianótica e hiperfluxo pulmonar através de tomografia computadorizada Evaluación pulmonar en niños portadores de cardiopatía congénita acianótica e hiperflujo pulmonar a través de tomografía computadorizada Computed tomography in pulmonary evaluation of children with acyanotic congenital heart defect and pulmonary hyperflow

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    Solange Gimenez

    2009-10-01

    Full Text Available JUSTIFICATIVA E OBJETIVOS: Disfunção respiratória é frequente em crianças com cardiopatias congênitas acianóticas com hiperfluxo pulmonar (CCAHP, porém pouco é conhecido sobre a estrutura pulmonar destes pacientes. O objetivo deste estudo foi quantificar os volumes de gás e tecido e a distribuição da aeração pulmonar nesta população. MÉTODOS: Após aprovação do Comitê de Ética institucional e obtenção do consentimento escrito pós-informado, foram obtidas tomografias computadorizadas torácicas em sete crianças com CCAHF. As imagens pulmonares direita e esquerda foram contornadas em todas as imagens e os volumes e pesos pulmonares foram computados a partir dos dados volumétricos. As comparações entre esquerda e direita foram analisadas usando teste t de Student pareado e as correlações através de regressão exponencial. RESULTADOS: A idade mediana foi 20 meses e o peso foi de 9,9 kg. Volume pulmonar total (VPT foi de 66,7 ± 23,1 mL.kg-1, o de tecido 33,5 ± 15,7 mL.kg-1 e o de gás 33,1 ± 8,3 mL.kg-1. O pulmão direito representou 57,9% e o pulmão esquerdo 42,1% do VPT (p JUSTIFICATIVA Y OBJETIVOS: La disfunción respiratoria es frecuente en niños con cardiopatías congénitas acianóticas con hiperflujo pulmonar (CCAHP, sin embargo, se conoce muy poco sobre la estructura pulmonar de esos pacientes. El objetivo de este estudio, fue cuantificar los volúmenes de gas y tejido y la distribución de la aeración pulmonar en esa población. MÉTODOS: Después de la aprobación por parte del Comité de Ética Institucional y de la obtención del consentimiento escrito informado, se obtuvieron tomografías computadorizadas torácicas en siete niños con CCAHF. Las imágenes pulmonares derecha e izquierda fueron perfiladas en todas las imágenes, y los volúmenes y los pesos pulmonares fueron computados a partir de los datos volumétricos. Las comparaciones entre izquierda y derecha fueron analizadas usando el test t de

  2. Condrossarcoma nasal: relato de caso

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    Pinna Fábio de Rezende

    2003-01-01

    Full Text Available O condrossarcoma é uma neoplasia maligna proveniente de tecido cartilaginoso, cuja incidência em região de cabeça e pescoço é rara. É mais freqüente em pacientes do sexo masculino, entre a terceira e quarta décadas, e na face localiza-se no seio e osso maxilar, sendo raro no septo nasal. Esse relato descreve o caso de uma paciente do sexo feminino, de 13 anos de idade, que apresentava queixa de deformidade facial em região malar direita acompanhada de dores esporádicas. Ao exame físico apresentava um abaulamento de aproximadamente 3 cm de diâmetro em região malar esquerda, não sendo notada nenhuma alteração à rinoscopia anterior. Foram realizadas tomografia computadorizada (TC de seios paranasais, ressonância magnética de face e biópsia da lesão para estudo anatomopatológico, que inicialmente sugeria o diagnóstico de condroma. Após a exérese da massa, a paciente evoluiu com recidiva da lesão em apenas 5 meses. Diante deste fato surpreendente, foi requisitada a revisão da lâmina que evidenciou Condrossarcoma tipo I. Nova cirurgia foi realizada, visando a remoção do tumor, com tratamento radioterápico complementar. Atualmente, a paciente se encontra em acompanhamento ambulatorial, sem queixas álgicas e sem sinas de recidiva. Os condrossarcomas são tumores malignos de crescimento lento, mas localmente agressivos, tendo grande propensão a recidivas. A conduta é preferencialmente cirúrgica, uma vez que são pouco radiossensíveis e a quimioterapia é meramente paliativa. O objetivo deste estudo é apresentar um caso de condrossarcoma em seio maxilar, etmóide, esfenóide e septo, discutindo o quadro clínico, diagnóstico, fatores prognósticos e conduta.

  3. Tomografia computadorizada de alta resolução nas complicações pulmonares pós-transplante de medula óssea: ensaio iconográfico High-resolution computed tomography findings in pulmonary complications after bone marrow transplantation: iconographic essay

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    Emerson L. Gasparetto

    2005-12-01

    Full Text Available O transplante de medula óssea (TMO tem sido utilizado como tratamento de escolha para diversas doenças hematológicas. Entretanto, as complicações pulmonares, que podem ocorrer em até 60% dos pacientes, são o principal motivo de falha no tratamento. As complicações pulmonares pós-TMO podem ser divididas em três fases, de acordo com a imunidade do paciente. Na primeira fase, até 30 dias após o procedimento, predominam as complicações não infecciosas e as pneumonias fúngicas. Na fase precoce, que vai até o 100º dia pós-TMO, as infecções virais, principalmente por citomegalovírus, são mais comuns. Finalmente, na fase tardia pós-TMO, complicações não infecciosas como bronquiolite obliterante com pneumonia em organização e doença do enxerto contra o hospedeiro são mais comumente observadas. Os autores apresentam um ensaio iconográfico, enfatizando os aspectos de tomografia de alta resolução em pacientes com complicações pulmonares pós-TMO.Bone marrow transplantation has been the treatment of choice for many hematologic diseases. However, pulmonary complications, which may occur in up to 60% of the patients, are the main cause of treatment failure and may be divided in three phases according to the patient's immunity. In the first phase, up to 30 days after the procedure, there is a predominance of non-infectious complications and fungal pneumonia. Viral infections, mainly by cytomegalovirus, are common in the second phase (up to 100 days after bone marrow transplantation. Finally, in the late phase after bone marrow transplantation, non-infectious complications as bronchiolitis obliterans organizing pneumonia and graft-versus-host disease are most commonly seen. The authors present a pictorial essay of the high-resolution computed tomography findings in patients with pulmonary complications after bone marrow transplantation.

  4. Nasal Physiology

    Science.gov (United States)

    ... Caregivers Contact ARS HOME ANATOMY Nasal Anatomy Sinus Anatomy Nasal Physiology Nasal Endoscopy Skull Base Anatomy Virtual Anatomy Disclosure ... Patient Education About this Website Font Size + - Home > ANATOMY > Nasal Physiology Nasal Anatomy Sinus Anatomy Nasal Physiology Nasal Endoscopy ...

  5. Nasal Anatomy

    Science.gov (United States)

    ... Caregivers Contact ARS HOME ANATOMY Nasal Anatomy Sinus Anatomy Nasal Physiology Nasal Endoscopy Skull Base Anatomy Virtual Anatomy Disclosure ... Size + - Home > ANATOMY > Nasal Anatomy Nasal Anatomy Sinus Anatomy Nasal Physiology Nasal Endoscopy Skull Base Anatomy Virtual Anatomy Disclosure ...

  6. Juvenile nasopharyngeal angiofibroma - study of the tumor extension and vascularization through computerized tomography (CT) scan and angiography and the patient's age; Nasoangiofibroma juvenil - estudo da extensao e vascularizacao do tumor pela tomografia computadorizada e angiografia, e da idade do paciente

    Energy Technology Data Exchange (ETDEWEB)

    Sennes, Luiz Ubirajara

    1997-07-01

    The juvenile nasopharyngeal angiofibroma is a rare benign tumor that affects male adolescents. It is a fibro-vascular tumor with an exuberant intra tumor blood flow and irrigated by several arteries. It originates from the lateral and posterior region of the nasal cavity and, due to its characteristic multidirectional growth, widely affects the paranasal sinuses and skull base, sometimes invading the cranial fossa or the cheek. The determinant factors of its growth and vascularisation are unknown. Attempting to clarify them, 33 patients from the University of Sao Paulo Medicine were studied from 1983 to 1995, with complete history and radiological documentation (CT scan and angiography), as well as with histological confirmation of the diagnosis. In order to take only tumors with natural evolution, patients with recidivant tumor and those already submitted to any previous treatment were excluded. The parameters evaluate were: patient age and tumor extension (by classification, degree of invasion and number of compromised sites in CT scan) and vascularisation (by number and degree of participation of bilateral arteries in angiography). The se data were tabled and correlated one with each other. (author)

  7. Cerebral toxoplasmosis in AIDS - computerized tomography evaluation; Toxoplasmose cerebral na SIDA - avaliacao por tomografia computadorizada

    Energy Technology Data Exchange (ETDEWEB)

    Alves, Regina Coeli Fonseca [Universidade Federal Fluminense, Niteroi, RJ (Brazil). Hospital Universitario Antonio Pedro. Servico de Radiologia; Narchiori, Edson [Universidade Federal Fluminense, Niteroi, RJ (Brazil). Dept. de Radiologia

    1999-06-01

    Cerebral toxoplasmosis is a disease that affects many AIDS's patients. FOr this paper 46 patients with confirmed cases of cerebral toxoplasmosis who did a CT scan between March, 1994 and September, 1997 were examined. Single lesions were found in 28.3% of the patients. The lesions were more frequently detected in the basal ganglia and the frontal lobes. No lesion was larger than 4 cm. As regards the contrast enhancing of the lesions on a CT scan we observed that 54.5% of the lesions had a ring-like contrast enhancing, 36.4% had a nodular contrast enhancing and 6% had a heterogeneous form. After the 21st day of treatment we noticed an improvement in the aspect of the patients'lesions. The improvement of the lesions could be seen through a reduction of the edematous halo, a reduction of the lesion size and a modification in the contrast enhancing on the CT scan. The CT scan was an important method to demonstrate the lesions compatibility enhancing on the CT scan. The CT scan was an important method to demonstrate the lesions compatibility with cerebral toxoplasmosis, as well as to monitor these patients during treatment. (author)

  8. Dose assessment in pediatric computerized tomography; Avaliacao de doses em tomografia computadorizada pediatrica

    Energy Technology Data Exchange (ETDEWEB)

    Vilarinho, Luisa Maria Auredine Lima

    2004-07-01

    The objective of this work was the evaluation of radiation doses in paediatric computed tomography scans, considering the high doses usually involved and the absence of any previous evaluation in Brazil. Dose values were determined for skull and abdomen examinations, for different age ranges, by using the radiographic techniques routinely used in the clinical centers investigated. Measurements were done using pencil shape ionization chambers inserted in polymethylmethacrylate (PMMA) phantoms. These were compact phantoms of different diameters were specially designed and constructed for this work, which simulate different age ranges. Comparison of results with published values showed that doses were lower than the diagnostic reference levels established to adults exams by the European Commission. Nevertheless, doses in paediatric phantoms were higher than those obtained in adult phantoms. The paediatric dose values obtained in Hospitals A and B were lower than the reference level (DRL) adopted by SHIMPTON for different age ranges. In the range 0 - 0.5 year (neonatal), the values of DLP in Hospital B were 94 por cent superior to the DRL For the 10 years old children the values of CTDI{sub w} obtained were inferior in 89 por cent for skull and 83 por cent for abdomen examinations, compared to the values published by SHRIMPTON and WALL. Our measured CTDI{sub w} values were inferior to the values presented for SHRIMPTON and HUDA, for all the age ranges and types of examinations. It was observed that the normalized dose descriptors values in children in the neonatal range were always superior to the values of doses for the adult patient. In abdomen examinations, the difference was approximately 90% for the effective dose (E) and of 57%.for CTDI{sub w} . (author)

  9. Tomografia computadorizada na intoxicação por metanol: relato de caso

    Directory of Open Access Journals (Sweden)

    H. Carrete Jr.

    1994-03-01

    Full Text Available Tivemos a oportunidade de acompanhar com exames de TC caso de intoxicação por metanol. O paciente foi submetido ao exame no momento da internação e após seis dias, pela persistência de quadro neurológico grave. Observou-se nesta última a presença de lesões putaminais simétricas e da substância branca subcortical, apesar do tratamento adequado. A comprovação tomográfica de lesões cerebrais evidenciou efeito tóxico do metanol e pode orientar o prognóstico neurológico.

  10. Analysis of the computed tomography in the acute abdomen; Analise da tomografia computadorizada no abdome agudo

    Energy Technology Data Exchange (ETDEWEB)

    Hochhegger, Bruno [Complexo Hospitalar Santa Casa de Porto Alegre, RS (Brazil); Moraes, Everton [Universidade Federal de Santa Maria (UFSM), RS (Brazil); Haygert, Carlos Jesus Pereira; Antunes, Paulo Sergio Pase [Hospital Universitario de Santa Maria, RS (Brazil); Gazzoni, Fernando [Pontificia Universidade Catolica de Porto Alegre (PUC-RS), Porto Alegre, RS (Brazil). Hospital Sao Lucas; Andrade, Rubens Gabriel Feijo [Fundacao Universitaria de Cardiologia de Porto Alegre, RS (Brazil). Inst. de Cardiologia; Bueno, Leticia Rossi [Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS (Brazil); Lopes, Luis Felipe Dias [Universidade Federal de Santa Maria (UFSM), RS (Brazil). Dept. de Estatistica]. E-mail: brunorgs@pop.com.br

    2007-07-01

    Introduction: This study tends to test the capacity of the computed tomography in assist in the diagnosis and the approach of the acute abdomen. Material and method: This is a longitudinal and prospective study, in which were analyzed the patients with the diagnosis of acute abdomen. There were obtained 105 cases of acute abdomen and after the application of the exclusions criteria were included 28 patients in the study. Results: Computed tomography changed the diagnostic hypothesis of the physicians in 50% of the cases (p < 0.05), and the confidence index in 85.71% of the cases (p 0.014). Computed tomography also altered the management in 46.43% of the cases (p > 0.05), where 78.57% of the patients had surgical indication before computed tomography and 67.86% after computed tomography (p = 0.0546). The index of accurate diagnosis of computed tomography, when compared to the anatomopathologic examination and the final diagnosis, was observed in 82.14% of the cases (p = 0.013). When the analysis was done dividing the patients in surgical and nonsurgical group, were obtained an accuracy of 89.28% (p 0.0001). The difference of 7.2 days of hospitalization (p = 0.003) was obtained compared with the mean of the acute abdomen without use the computed tomography. Conclusion: The computed tomography is correlative with the anatomopathology and has great accuracy in the surgical indication, associated with the capacity of increase the confident index of the physicians, reduces the hospitalization time, reduces the number of surgeries and is cost-effective. (author)

  11. Incidental orbital calcifications on computed tomography scans; Calcificacoes orbitarias incidentais na tomografia computadorizada

    Energy Technology Data Exchange (ETDEWEB)

    Fugita, Dalton Yukio A.; Cruz, Daniela Nogueira; Cappucci, Alessandro; Arakava, Marcia Mayumi; Guimaraes, Maria Carolina; Wolosker, Angela Maria B.; Yamashita, Helio Kiitiro [Universidade Federal de Sao Paulo (UNIFESP), SP (Brazil). Dept. de Diagnostico por Imagem; Manso, Paulo Goes [Universidade Federal de Sao Paulo (UNIFESP), SP (Brazil). Dept. de Oftalmologia

    2001-02-01

    We retrospectively studied the computed tomography scans of the orbit in 75 patients in order to identify the presence of incidental calcifications (scleral and trochlear apparatus calcifications.). These imaging findings should integrate the vast list of differential diagnosis of orbital calcifications, as they may help radiologists to distinguish these calcifications from orbital foreign bodies. (author)

  12. Aspectos da tomografia computadorizada craniana na neurocisticercose na infância

    Directory of Open Access Journals (Sweden)

    Marilisa M. Guerreiro

    1989-06-01

    Full Text Available Os autores relatam aspectos tomográficos da neurocisticercose na infância a propósito da análise de 27 exames em 18 pacientes, que foram distribuídos em três grupos segundo o quadru clínico e os achados tomográficos. O grupo 1 foi caracterizado basicamente por epilepsias e calcificações. O grupo 2 caracterizou-se por hipertensão intracraniana e diversos aspectos tomográficos: edema, cistos e nódulos em três pacientes; hidrocefalia e calcificações em dois pacientes e normal em um paciente. O grupo 3 consistiu clinicamente de epilepsia e cefaléia, com vários padrões tomográficos. Os resultados são discutidos à luz da literatura disponível.

  13. Computed tomography study of otitis media; A tomografia computadorizada no estudo das otites medias

    Energy Technology Data Exchange (ETDEWEB)

    Bahia, Paulo Roberto Valle; Marchiori, Edson [Universidade Federal, Rio de Janeiro, RJ (Brazil). Dept. de Radiologia

    1997-03-01

    The findings of computed tomography (CT) of 89 patients clinically suspected of having otitis media were studied in this work. Such results were compared to clinical diagnosis, otoscopy, surgical findings and previous data. Among the results of our analysis, we studied seven patients with acute otitis media and 83 patients with chronic otitis media. The patients with acute otitis media have undergone CT examinations to evaluate possible spread to central nervous system. The diagnosis of cholesteatoma, its extension and complications were the main indication. for chronic otitis media study. The main findings of the cholesteatomatous otitis were the occupation of the epitympanun, the bony wall destruction and the ossicular chain erosion. The CT demonstrated a great sensibility to diagnose the cholesteatoma. (author) 25 refs., 10 figs.

  14. Traumatic mediastinal lesions: computed tomography findings; Lesoes traumaticas do mediastino: aspectos na tomografia computadorizada

    Energy Technology Data Exchange (ETDEWEB)

    Melo, Alessandro Severo Alves de; Moreira, Luiza Beatriz Melo [Hospital Municipal Souza Aguiar, Rio de Janeiro, RJ (Brazil); Marchiori, Edson [Universidade Federal Fluminense, Niteroi, RJ (Brazil). Disciplina de Radiologia]. E-mail: Lubiamoreira@bol.com.br

    2003-10-01

    Traumatic mediastinal lesions are unusual findings in patients with thoracic trauma but may represent poor prognosis and be associated with severe lesions. Mediastinal trauma is increasingly being diagnosed by computed tomography due to the fast acquisition times of helical techniques, allowing the evaluating of critically ill patients and the adoption of efficient therapeutic measures. The authors studied 11 patients with mediastinal lesions who were submitted to computed tomography due to thoracic trauma. The most frequent finding was mediastinal bleeding characterized by infiltration of mediastinal fat, dense material within the mediastinal spaces or hematoma. Hemo pericardium was the second most common lesion in this series, appearing as dense or liquid material in the pericardium. Aortic lesions such as wall irregularities or pseudoaneurisms were less commonly seen (three patients). In this study blunt thoracic traumas were observed in six cases whereas penetrating trauma occurred in five cases. The causes of blunt trauma were pedestrians struck by car, motor vehicle accidents and falls. Penetrating trauma was due to lesions produced by bullets or knifes. (author)

  15. Renal lymphoma: spectrum of computed tomography findings; Linfoma renal: espectro de imagens na tomografia computadorizada

    Energy Technology Data Exchange (ETDEWEB)

    Maranhao, Carol Pontes de Miranda; Bauab Junior, Tufik [Faculdade de Medicina do Sao Jose do Rio Preto (FAMERP), SP (Brazil). Hospital de Base. Dept. de Imagem]. E-mail: tbauab@riopreto.com.br

    2005-04-01

    Isolated renal lymphoma is rare due to the absence of lymphoid tissue in kidneys. Secondary involvement occurs more frequently and is reported in up to 1/3 of the autopsies of patients who died from lymphoma. Some authors believe this is actually the only existing form of renal lymphoma. The involvement of the kidney by lymphoma would occur through hematogenic metastasis or direct tumor invasion of the peri renal space. These different types of involvement determine the several forms of renal lymphoma presentation: multiple nodules, solitary mass, renal invasion from contiguous retroperitoneal disease, peri renal disease and diffuse infiltration. In this study the imaging findings features of the different forms of involvement are presented and discussed. (author)

  16. Computed tomography of diseases involving the iliopsoas compartment; Tomografia computadorizada das patologias acometendo o compartimento iliopsoas

    Energy Technology Data Exchange (ETDEWEB)

    Montandon, Cristiano; Maeda, Lucimara; Bianchessi, Susana Trigo; Turi, Fabiano; Torriani, Martin [Universidade Estadual de Campinas, SP (Brazil). Faculdade de Ciencias Medicas. Dept. de Radiologia]. E-mail: torr@unicamp.br

    2001-02-01

    Our aim is to review the most common pathologic processes involving the iliopsoas compartment. We retrospectively reviewed the computed tomography (CT) scans performed at the Radiology Dept. of the Medical Sciences Faculty from Universidade Estadual de Campinas, in the last 10 years, of patients who presented with abnormalities of the iliopsoas compartment that were confirmed by surgical or percutaneous biopsy. The most common findings involving the iliopsoas compartment included neoplasms, abscesses and hematomas. CT findings were based on the extension of the involvement of the psoas muscle, focal areas of low or high attenuation, lesion margins, presence of gas or calcification within the lesion, bone destruction, infiltration of of surrounding fat and involvement of adjacent abdominal structures. CT is the method of choice for the detection of iliopsoas disorders, and its findings can be used to guide diagnostic aspiration, biopsy or drainage, when appropriate. However, the efficacy of CT in differentiating iliopsoas disorders is low when scans are interpreted without knowledge of clinical history. (author)

  17. Computerized tomography quality control program; Programa de controle da qualidade em tomografia computadorizada

    Energy Technology Data Exchange (ETDEWEB)

    Tiecher, Maria Ester S.; Ferreira, Nadya Maria P.D. [Instituto Militar de Engenharia (IME), Rio de Janeiro, RJ (Brazil); Carlos, Marcia Terezinha [Instituto de Radioprotecao e Dosimetria (IRD), Rio de Janeiro, RJ (Brazil)

    1999-11-01

    Computed Tomography, CT, is a practice used in radiodiagnosis, based on radiation (x-rays) interaction with matter and image reconstruction. No doubt there are great benefits to this procedure, but some problems can be found with it. Little attention has been paid to the high incident doses which patients undergo during these tests. This work is intended to develop a quality control program over CT. The methodology evaluates the performance of the CT by studying the image`s physical parameters. It also verifies the effectiveness of the beam according to the measurement of the doses, Computed Tomography Dose Index. In this case, this is done by using measurements in simulators (phantoms). Internationally established tests were implemented: high resolution and low contrast, linearity, uniformity of CT numbers, noise, slice thickness and artifacts. All the tests were performed at the Hospital Central do Exercito. Doses measurements were done using a pencil ionization chamber and phantom heads and bodies, supplied by the equipment`s manufacturer. The obtained results showed the efficiency of the methodology allowing for the correction of some drawbacks without deviating from the routine procedures. (author) 12 refs., 4 figs., 4 tabs.

  18. Liver CT-guided aspirative biopsies; Puncao aspirativa de figado dirigida por tomografia computadorizada

    Energy Technology Data Exchange (ETDEWEB)

    Santos, Gilda da Cunha; Carvalho, Leda Viegas de [Hospital de Clinicas (HCFMUSP), Sao Paulo, SP (Brazil). Divisao de Anatomia Patologica; Granero, Luzete Cristina Silva [Univeridade Federal de Sao Paulo (UNIFESP), SP (Brazil); Chojniak, Rubens [Hospital A.C. Camargo, Sao Paulo, SP (Brazil). Dept. de Imagem; Morini, Sandra Regina

    1996-09-01

    Sixty-eight CT-guided aspirative biopsies of hepatic nodules were performed at A.C. Camargo Hospital, Sao Paulo, Brazil, from 1992 to 1995. The cases were distributed as follow: 44(64.7%) with a positive diagnosis for neoplastic cells, 6(8.8%) with a negative diagnosis, and 14 (20.5%) with insufficient material. Of the positive cases (primary neoplasias and metastases), the cytological diagnosis was achieved in 39 cases. There were 36 cases of carcinoma (7 hepato carcinomas, 18 adenocarcinomas, 1 small cell carcinoma and 10 cases of unspecified differentiation), 2 cases of melanoma and 1 case of melanoma and 1 case of sarcoma. The correlation with histopathological exams showed no false positive cases and concordance between cytological and histopathological diagnosis. The results demonstrate that CT-guided aspirative biopsy of hepatic nodules permits a rapid diagnosis of neoplastic lesions, especially for the evaluation of metastases. (author) 9 refs., 1 fig.

  19. Computed tomography evaluation of mast cell tumours; Avaliacao por tomografia computadorizada dos mastocitomas

    Energy Technology Data Exchange (ETDEWEB)

    Lorigados, Carla Aparecida Batista; Matera, Julia Maria; Macedo, Thais; Pinto, Ana Carolina Brandao Fonseca, E-mail: clorigados@usp.br [Universidade de Sao Paulo (USP), SP (Brazil). Faculdade de Medicina Veterinaria e Zootecnia. Dept. de Cirurgia

    2012-07-01

    The mast cell tumours are common tumours of the canine skin. Computed tomography (CT) has assumed an important role in tumours evaluation and staging. The aim of this study was to evaluate the role of CT as a method of assessing characteristics of mast cell tumors. Ten dogs with mast cell tumor were evaluated. CT was performed before and after the intravenous injection of hydro soluble ionic iodine. Attenuation, contrast enhancement, cleavage with adjacent tissues and the unidimensional measurement of each lesion was determined in it maximum diameter, in transversal plane. Concerning the attenuation characteristic, 50% were homogeneous and 50% heterogeneous. The contrast enhancement was homogeneous in 50% of cases, heterogeneous in 40% and peripheral in 10%. Fifty percent of the tumours showed loss of plane of cleavage and 30% partial loss. This information can help in directing the patients that will be undergoing chemotherapy or surgery. (author)

  20. Nasal Cancer

    Science.gov (United States)

    ... the way to your throat as you breathe. Cancer of the nasal cavity and paranasal sinuses is ... be like those of infections. Doctors diagnose nasal cancer with imaging tests, lighted tube-like instruments that ...

  1. Valor diagnóstico da tomografia de coluna cervical em vítimas de trauma contuso

    Directory of Open Access Journals (Sweden)

    Daniel Faria de Campos Pinheiro

    Full Text Available OBJETIVO. Avaliar o valor da tomografia computadorizada no diagnóstico de lesões da coluna e medula cervicais em vítimas de trauma contuso. MÉTODOS. Revisão dos prontuários de vítimas de trauma contuso atendidas de janeiro de 2006 a dezembro de 2008. Foram analisados os seguintes dados: epidemiológicos, mecanismo de trauma, transporte das vítimas para o hospital, atendimento intra-hospitalar, critérios de indicação da TC, diagnóstico, tratamento, e evolução das vítimas em estudo. As vítimas foram distribuídas em dois grupos: Grupo I - sem lesão na coluna cervical; Grupo II - com lesão na coluna cervical . RESULTADOS. Foram analisados os prontuários de 3.101 vítimas. A tomografia computadorizada foi indicada em 1.572 (51% pacientes, Foi observado predomínio masculino entre as vítimas (79%, com média etária de 38,53 anos no Grupo I e 37,60 anos no Grupo II. A distribuição dos mecanismos de trauma foi semelhante nos dois grupos. Lesões encontradas: 53 fraturas, oito listeses vertebrais e oito lesões medulares. As sequelas incluíram: três paraplegias, cinco tetraplegias e oito sequelas de lesão cerebral. No Grupo II ocorreram sete óbitos ,no Grupo I 240. A duração média de internação hospitalar foi de 11 dias para o Grupo I e 26,2 dias para o Grupo II. CONCLUSÃO. A TC de coluna cervical em vítimas de trauma contuso foi eficaz na identificação de lesões da coluna e medula cervicais. Assim, apesar do custo da TC cervical, e da baixa incidência de lesões por ela identificáveis, a sua indicação baseada nos critérios usuais parece justificável.

  2. Tomografia de coerência óptica em osteoma de coróide: relato de caso Optical coherence tomography in choroidal osteoma: case report

    Directory of Open Access Journals (Sweden)

    Mário Junqueira Nóbrega

    2005-10-01

    Full Text Available Os autores apresentam um caso de osteoma de coróide diagnosticado em paciente do sexo masculino aos 62 anos de idade. A lesão bem delimitada e pouco elevada no pólo posterior do olho direito acompanhada de vascularização interna e neovascularização de coróide em sua borda temporal superior e inferior levaram à suspeita do tumor. O diagnóstico de certeza foi obtido com ecografia A e B e tomografia computadorizada. A tomografia de coerência óptica mostrou alta refletividade em toda a espessura do osteoma bem como elevação do complexo EPR-cório-capilar na região da membrana neovascular subretiniana. Embora os achados tomográficos descritos na literatura e os observados neste caso sejam variados, a tomografia de coerência óptica pode colaborar no diagnóstico de osteoma de coróide.The authors present a case of choroidal osteoma diagnosed in a 62-year-old male patient. A well-defined and slightly elevated lesion located in the posterior pole of the right eye associated with internal vasculature and choroidal neovascularization at its superior and inferior temporal edge were suspicious of the tumor. Confirmation of diagnosis was obtained with A and B ecography and computed tomography. Optical coherence tomography showed high reflectivity through its thickness as well as elevation of the RPE-choriocapillaris complex at the choroidal neovascularization site. Although the literature and the present case show several different tomographical findings, optical coherence tomography can help establishing the diagnosis of choroidal osteoma.

  3. Nasal lifting.

    Science.gov (United States)

    Pontes, Ronaldo; Pontes, Gisela Hobson; Serpa, Narayana Pauline; Lopez, Carlos

    2005-01-01

    Patients with gland hyperplasia as well as thickening and redundancy of nasal skin who receive treatment that addresses only the support structures generally suffer from lack of definition of the nasal tip. We report on a case in which this problem was treated by redefinition of the nasal dorsum and tip through resection of the redundant skin. The surgical approach involved open rhinoplasty with a columella-alar incision, wide dissection of the dorsum filling, caudal traction, and resection of excess tissue. This method enabled reshaping of the nasal dorsum and tip by readjustment of the cutaneous covering of the osteocartilaginous structures.

  4. Estudo do metabolismo da glicose na tuberculose pulmonar ativa utilizando a tomografia por emissão de pósitrons (18F-FDG PET Evaluation of glucose metabolism in active lung tuberculosis by positron-emission tomography (18F-FDG PET

    Directory of Open Access Journals (Sweden)

    SIDNEY BOMBARDA

    2002-09-01

    Full Text Available Os métodos de imagem utilizados na avaliação da tuberculose pulmonar incluem a radiografia e a tomografia computadorizada do tórax. As imagens obtidas pelos métodos de medicina nuclear permitem estudos funcionais e metabólicos dos órgãos de interesse, através do uso de radiofármacos específicos. Alterações do metabolismo da glicose podem ser detectadas pela tomografia por emissão de pósitrons (PET utilizando-se o 18F-fluorodesoxiglicose (18F-FDG. Essas alterações estão presentes nas doenças neoplásicas, inflamatórias e infecciosas. A tuberculose é uma doença granulomatosa causada pelo Mycobacterium tuberculosis, que se utiliza de glicose como fonte de energia. Objetivo: O estudo do metabolismo da glicose na tuberculose pulmonar através da PET e sua comparação com a tomografia computadorizada de tórax. Material e métodos: Foram avaliados 20 pacientes portadores de tuberculose pulmonar. Todos foram submetidos à PET e à tomografia computadorizada de tórax, em até 30 dias após o início do tratamento. Resultados: Todos os pacientes apresentaram captação positiva do 18F-FDG na PET. Na tomografia computadorizada do tórax, todos os pacientes apresentaram sinais compatíveis com atividade de tuberculose. A sensibilidade dos dois métodos foi de 100%. Houve concordância entre os achados do 18F-FDG PET e da tomografia computadorizada (K = 0,27 e p Current methods to evaluate lung tuberculosis include chest radiography and computed tomography. Nuclear medicine imaging techniques are performed after administration of specific radiopharmaceuticals that accumulate in the organs of interest. Alterations of glucose metabolism can be observed by positron-emission tomography, using 18F-fluorodeoxyglucose (18F-FDG PET. These findings are present in the neoplasms, but also in inflammatory and infectious diseases. Tuberculosis is a granulomatous disease caused by Mycobacterium tuberculosis , that uses glucose as an energy source

  5. Bone densitometry in healthy cats by quantitative computed tomography; Densitometria ossea em gatos higidos por tomografia computadorizada quantitativa

    Energy Technology Data Exchange (ETDEWEB)

    Oliveira, D.C. [Universidade Federal do Parana - Curitiba, PR (Brazil); Costa, L.A.V.S.; Teixeira, M.W.; Costa, F.S. [Universidade Federal Rural de Pernambuco - Recife, PE (Brazil); Cardoso, M.J.L. [Universidade Estadual do Norte do Parana - Campus Luiz Meneghel - Bandeirantes, PR (Brazil)

    2012-06-15

    The radiodensity of the trabecular bone of the lumbar vertebrae in 16 healthy adult cats was studied using quantitative computed tomography (QCT). The average radiodensity of the trabecular bone of the second lumbar vertebra was 436.1 +- 42.1 Hounsfield units. However, there was a nonhomogeneous radiodensity distribution of the vertebral body. (author)

  6. Progressive systemic sclerosis: high-resolution computed tomography findings; Esclerose sistemica progressiva: aspectos na tomografia computadorizada de alta resolucao

    Energy Technology Data Exchange (ETDEWEB)

    Gasparetto, Emerson L.; Pimenta, Rodrigo; Ono, Sergio E.; Escuissato, Dante L. [Parana Univ., Curitiba, PR (Brazil). Hospital de Clinicas. Servico de Radiologia Medica]. E-mail: dante.luiz@onda.com.br; Inoue, Cesar [Parana Univ., Curitiba, PR (Brazil). Faculdade de Medicina

    2005-09-15

    Objective: To describe the high-resolution computed tomography findings in the lung of patients with systemic sclerosis, independently of the respiratory symptoms. Materials and methods: Seventy-three high-resolution computed tomography scans of 44 patients with clinical diagnosis of systemic sclerosis were reviewed and defined by the consensus of two radiologists. Results: Abnormalities were seen in 91.8% (n = 67) of the scans. The most frequent findings were reticular pattern (90.4%), ground-glass opacities (63%), traction bronchiectasis and bronchiolectasis (56.2%), esophageal dilatation (46.6%), honeycombing pattern (28.8%) and signs of pulmonary hypertension (15.6%). In most cases the lesions were bilateral (89%) and symmetrical (58.5%). The lesions were predominantly located in the basal (91.2%) and peripheral (92.2%) regions. Conclusion: In the majority of the patients, progressive systemic sclerosis can cause pulmonary fibrosis mainly characterized by reticular pattern with basal and peripheral distribution on high-resolution computed tomography. (author)

  7. Análise por tomografia computadorizada do enxerto autógeno na cirurgia de "sinus lift"

    OpenAIRE

    2005-01-01

    OBJETIVO: Quantificar a formação óssea nos enxertos com e sem plasma rico em plaquetas, obtido pelos métodos de centrifugação e aférese, comparando os três tipos de enxertos realizados por meio de análise tomográfica. MATERIAIS E MÉTODOS: Este estudo prospectivo, duplo cego, utilizou uma amostra composta de 34 pacientes adultos, de ambos os sexos, com idade média de 48 anos e 8 meses, portadores de pneumatização unilateral ou bilateral dos seios maxilares, que necessitavam de enxertos ósseos,...

  8. Osteosarcoma and chondrosarcoma: radiographic differentiation by means of computed tomography; Osteossarcoma e condrossarcoma - diferenciacao radiografica por meio da tomografia computadorizada

    Energy Technology Data Exchange (ETDEWEB)

    Tossato, Patricia dos Santos; Pereira, Amanda Caceres; Cavalcanti, Marcelo Gusmao Paraiso [Sao Paulo Univ., SP (Brazil). Faculdade de Odontologia. Dept. de Estomatologia

    2002-03-01

    The purpose of this paper was to associate and compare the radiographic patterns of osteosarcoma and those of chondrosarcoma by means of computed tomography (CT). Computed tomographs of five cases of osteosarcoma and five cases of chondrosarcoma of the head and neck region were analyzed. The sensitivity of CT was calculated based on the results of histopathological examinations. We concluded that CT can facilitate the establishment of the final diagnosis since it is possible to distinguish the individual characteristics of osteosarcomas and chondrosarcomas in that exam. (author)

  9. Development of a guidance guide for dosimetry in computed tomography; Desenvolvimento de um guia orientativo para dosimetria em tomografia computadorizada

    Energy Technology Data Exchange (ETDEWEB)

    Fontes, Ladyjane Pereira

    2016-07-01

    Due to frequent questions from users of ionization chambers pencil type calibrated in the Instrument Calibration Laboratory of the Institute of Energy and Nuclear Research (LCI - IPEN), on how to properly apply the factors indicated in their calibration certificates, a guide was prepared guidance for dosimetry in computed tomography. The guide includes guidance prior knowledge of half value layer (HVL), as it is necessary to know the effective beam energy for application quality for correction factor (kq). The evaluation of HVL in TC scanners becomes a difficult task due to system geometry and therefore a survey was conducted of existing methodologies for the determination of HVL in clinical beams Computed Tomography, taking into account technical, practical and economic factors. In this work it was decided to test a Tandem System consists of absorbing covers made in the workshop of IPEN, based on preliminary studies due to low cost and good response. The Tandem system consists of five cylindrical absorbing layers of 1mm, 3mm, 5mm, 7mm and 10mm aluminum and 3 cylindrical absorbing covers 15mm, 25mm and acrylic 35mm (PMMA) coupled to the ionization chamber of commercial pencil type widely used in quality control tests in dosimetry in clinical beams Computed tomography. Through Tandem curves it was possible to assess HVL values and from the standard curve pencil-type ionization chamber, Kq find the appropriate beam. The elaborate Guide provides information on how to build the calibration curve on the basis of CSR, to find the Kq and information for construction Tandem curve, to find values close to CSR. (author)

  10. Aspects of pulmonary emphysema on high resolution computed tomography; Aspectos do enfisema pulmonar na tomografia computadorizada de alta resolucao

    Energy Technology Data Exchange (ETDEWEB)

    Angelo Junior, J.R.L.; Castro Lessa Angelo, M.T. de; Silva, F.M.D.; Costa, N.S.S.; Kavakama, J.; Carvalho, C.R.R.; Cerri, G.G. [Sao Paulo Univ., SP (Brazil). Faculdade de Medicina. Hospital das Clinicas

    1995-03-01

    Pulmonary emphysema is an entity characterized by enlargement of the air-space with bronchiolar walls destruction with-out evident fibrosis. It is classified according to anatomic distribution of the areas of lung destruction into these types: centrilobular, panlobular, paraseptal, and paracicatricial. TCAR is superior to chest radiographs and conventional CT is detecting these areas of pulmonary destruction. (author). 10 refs, 7 figs.

  11. Radiation conditions for computerized tomography: determination and comparison; Condicoes de radiacao para tomografia computadorizada: determinacao e comparacoes

    Energy Technology Data Exchange (ETDEWEB)

    Andrade, Lucio das Chagas de

    2016-07-01

    Radiology is the practice in which radiation beams, usually radiation X are used to produce an image of the human body in order to obtain a diagnosis, for example, to evaluate a pathological condition by computerized tomography (CT). Although the computerized tomography diagnostic potential is unquestionable, caution must be taken because the doses are almost always higher than the observed in conventional radiology procedures. The ionization chamber used for dosimetry in CT is a unsealed cylindrical chamber with 10 cm and 15 cm of sensitive length. A typical characteristics of this camera is its uniform response to radiation incident at all angles around its axis. The revised edition of IEC 61267 (2005) brought as an innovation the radiation conditions for computed tomography, RQT, that simulate non-attenuated beam and are used in special CT applications. This study aims to establish the necessary conditions to obtain radiation pattern beam computed tomography, RQT, and a calibration laboratory implementation for pencil ionization chambers used in the beam dosimetry produced by these scanners in the Metrology National Laboratory of Ionizing Radiation (LNMRI). In the implementation of RQT conditions we were found that the ratio of kerma rates in the air, with or without additional filtration equivalent to the first HVL (half-value layer), are in accordance with IEC 61267 (2005), which provides a range between 48.5% and 51.5% for each quality. The LNMRI characterized the radiation conditions of RQT series (IEC, 2005), obtaining a percentage of 49.6% for the RQT 8, 50% for the RQT 9 and 50,4% for the RQT 10. With the substitution of the total additional filtration RQT qualities, composed by Al + Cu and by a total filtration composed by copper (Cu) only, it can be seen the emergence of a similar RQT quality named Quality Copper Tomography - QCT. The results of the calibration, the RQT and QCT qualities, had expanded uncertainties with a confidence level 95.45%, less then 4%. Studies of copper as attenuating material were very useful, making possible the implementation of QCT quality similar to RQT. Within results obtained for the equivalence curves between Al and Cu filtrations, it was found that copper could be used as material in the construction of the attenuation curve. (author)

  12. Quality control and dosimetry in computed tomography units; Controle de qualidade e dosimetria em equipamentos de tomografia computadorizada

    Energy Technology Data Exchange (ETDEWEB)

    Pina, Diana Rodrigues de; Ribeiro, Sergio Marrone [UNESP, Botucatu, SP (Brazil). Faculdade de Medicina], e-mail: drpina@fmb.unesp.br; Duarte, Sergio Barbosa [Centro Brasileiro e Pesquisas Fisicas (CBPF), Rio de Janeiro, RJ (Brazil); Netto, Thomaz Ghilardi [Universidade de Sao Paulo (USP), Ribeirao Preto, SP (Brazil). Hospital das Clinicas. Centro de Ciencias das Imagens e Fisica Medica; Morceli, Jose [UNESP, Botucatu, SP (Brazil). Faculdade de Medicina. Secao de Diagnostico por Imagem; Carbi, Eros Duarte Ortigoso; Costa Neto, Andre; Souza, Rafael Toledo Fernandes de [UNESP, Botucatu, SP (Brazil). Inst. de Biociencias

    2009-05-15

    Objective: Evaluation of equipment conditions and dosimetry in computed tomography services utilizing protocols for head, abdomen, and lumbar spine in adult patients (in three different units) and pediatric patients up to 18 months of age (in one of the units evaluated). Materials and methods: Computed tomography dose index and multiple-scan average dose were estimated in studies of adult patients with three different units. Additionally, entrance surface doses as well as absorbed dose were estimated in head studies for both adult and pediatric patients in a single computed tomography unit. Results: Mechanical quality control tests were performed, demonstrating that computed tomography units comply with the equipment-use specifications established by the current standards. Dosimetry results have demonstrated that the multiplescan average dose values were in excess of up to 109.0% the reference levels, presenting considerable variation amongst the computed tomography units evaluated in the present study. Absorbed doses obtained with pediatric protocols are lower than those with adult patients, presenting a reduction of up to 51.0% in the thyroid gland. Conclusion: The present study has analyzed the operational conditions of three computed tomography units, establishing which parameters should be set for the deployment of a quality control program in the institutions where this study was developed. (author)

  13. Definition of ureterovesical junction level by computed tomography; Definicao do nivel da juncao ureterovesical pela tomografia computadorizada

    Energy Technology Data Exchange (ETDEWEB)

    Freire Filho, Edison de Oliveira; Leao, Alberto Ribeiro de Souza; Capobianco, Julia; Szejnfeld, Jacob; D' Ippolito, Giuseppe [Universidade Federal de Sao Paulo, SP (Brazil). Escola Paulista de Medicina. Dept. de Diagnostico por Imagem]. E-mail: eofilho@ig.com.br

    2006-11-15

    Objective: To define, by means of computed tomography, the level of ureteral implantation into de bladder. Materials And Methods: We have measured the distances from the ureteral meatus to the acetabulum, and to the superior margin of the pubic symphysis, as well as the bladder volume, using contrast enhanced computed tomography of the pelvis in 46 patients (31 male and 15 female) in the age range between 18 and 45 years, with at least one of the ureters filled with excreted contrast material. The Student t test has been applied to determine eventual statistically significant differences between groups. Results: The level of ureteral implantation into the bladder was, on average, 10.6 +- 8.1 mm below the acetabular roof, and 29.7 +- 9.5 mm above the superior margin of the pubic symphysis. In patients with bladder repletion volume of < 200 ml and . 200 ml, the level of ureteral implantation into the bladder was, respectively, on average, 11.6 +- 7.3 mm and 10.2 +- 8.4 mm below the acetabular roof (p 0.61), and 28.3 +- 7.3 mm and 30.3 +- 10.2 mm above the superior margin of the pubic symphysis (p 0.52), and in male and female men patients, respectively, on average, 11.8 +- 8.0 mm and 8.3 +- 8.0 mm below the acetabular roof (p 0.17), and 27.7 +- 9.2 mm and 33.9 +- 8.8 mm above the superior margin of the pubic symphysis (p 0.34). Conclusion: Calcifications located < 3 cm below the acetabular roof and < 1.5 cm above the superior margin of the pubic symphysis probably do not represent ureteral calculi. Vesical repletion or sex have no significant influence on the ureteral meatus position. (author)

  14. Evaluation of the absorbed dose in odontological computerized tomography; Avaliacao da dose absorvida em tomografia computadorizada odontologica

    Energy Technology Data Exchange (ETDEWEB)

    Legnani, Adriano; Schelin, Hugo R.; Rocha, Anna Silvia P.S. da, E-mail: schelin@utfpr.edu.b, E-mail: anna@utfpr.edu.b [Universidade Tecnologica Federal do Parana (UTFPR), Curitiba, PR (Brazil); Khoury, Helen J., E-mail: khoury@ufpe.b [Universidade Federal de Pernambuco (UFPE), Recife, PE (Brazil)

    2011-10-26

    This paper evaluated the absorbed dose at the surface entry known as 'cone beam computed tomography' (CBCT) in odontological computerized tomography. Examination were simulated with CBCT for measurements of dose. A phantom were filled with water, becoming scatter object of radiation. Thermoluminescent dosemeters were positioned on points correspondent to eyes and salivary glands

  15. Deep benign fibrous histiocytoma: computed tomography and histology findings; Histiocitoma fibroso benigno profundo: achados na tomografia computadorizada e histologia

    Energy Technology Data Exchange (ETDEWEB)

    Farage, Luciano; Castro, Mario Augusto Padula; Macedo, Tulio Augusto Alves [Uberlandia Univ., MG (Brazil). Hospital das Clinicas. Setor de Radiologia; Salomao, Eliana Chaves; Machado, Tania Alcantara; Souza, Lincoln Pereira de; Freitas, Luiz de Oliveira [Uberlandia Univ., MG (Brazil). Faculdade de Medicina. Dept. de Clinica Medica

    2005-04-01

    We present the computed tomography images of an 83-year-old male patient with a deep benign fibrous histiocytoma at the lateral aspect of the left leg. Computed tomography images showed a well-defined mass with marked peripheral enhancement by iodinated contrast medium. Only few reports of this rare soft tissue tumor can be found in the literature. (author)

  16. Wegener's granulomatosis: chest computed tomography findings; Granulomatose de Wegener: aspectos na tomografia computadorizada de torax

    Energy Technology Data Exchange (ETDEWEB)

    Monteiro, Evelise de Azevedo; Marchiori, Edson; Martins, Erick Malheiro Leoncio [Universidade Federal Fluminense, Niteroi, RJ (Brazil). Dept. de Radiologia]. E-mail: edmarchiori@zipmail.com.br; Souza Junior, Arthur Soares [Faculdade de Medicina de Sao Jose do Rio Preto (FAMERP), SP (Brazil). Hospital de Base; Cerqueira, Elza Maria F.P. de [Universidade Estadual de Campinas, SP (Brazil). Faculdade de Ciencias Medicas. Dept. de Radiologia; Irion, Klaus L. [Pavilhao Pereira Filho, Porto Alegre, RS (Brazil); Araujo Neto, Cesar de [Bahia Univ., Salvador, BA (Brazil). Dept. de Radiologia; Souza, Rodrigo Azeredo de [Universidade Federal, Rio de Janeiro, RJ (Brazil). Faculdade de Medicina. Dept. de Radiologia

    2003-03-01

    Wegeners granulomatosis is an inflammatory systemic necrotizing idiopathic vasculitis affecting mainly small vessels. In this paper we analyzed the computed tomography findings of seven patients with Wegeners granulomatosis. The most common findings were masses and nodules (71.4%), areas of ground glass attenuation (57.1%), consolidation (42.8%), halo sign (42.8%), cavitation (42.8%), interlobular septa thickening (14.2%), bronchial wall thickening (14.2%) and pleural effusion (14.2%). Although radiological findings are mostly nonspecific, computed tomography and particularly high-resolution computed tomography are important tools in the evaluation of disease activity when evaluated in association with bronchoscopy findings and clinical data. (author)

  17. AIDS related thoracic lymphoma: evaluation by computed tomography; Linfoma toracico na sindrome da imunodeficiencia adquirida: avaliacao por tomografia computadorizada

    Energy Technology Data Exchange (ETDEWEB)

    Siciliano, Antonio Alexandre de Oliveira [Hospital Universitario Clementino Fraga Filho, Rio de Janeiro, RJ (Brazil). Servico de Radiodiagnostico; Marchiori, Edson [Universidade Federal, Rio de Janeiro, RJ (Brazil). Curso de Pos-graduacao em Radiologia

    2000-02-01

    The authors reviewed five cases of patients with acquired immunodeficiency syndrome (AIDS) related lymphoma to describe the thoracic findings on computed tomography. The patients were followed at Hospital Universitario Clementino Fraga Filho, Hospital Universitario Antonio Pedro and Hospital da Lagoa, from November, 1989 to March 1998. Epidemiological, clinical and pathological data from these patients were quiet variable and pulmonary nodules and masses, hilar and mediastinal lymphadenopathy, and thoracic wall masses were observed. AIDS related lymphomas involving the chest are pleomorphic and most commonly extranodal. (author)

  18. Dose profile in computed tomography chest scan; Perfil de dose em varredura de torax em tomografia computadorizada

    Energy Technology Data Exchange (ETDEWEB)

    Oliveira, Bruno B., E-mail: bbo@cdtn.b [Centro de Desenvolvimento da Tecnologia Nuclear (CDTN/CNEN-MG), Belo Horizonte, MG (Brazil). Pos-graduacao em Ciencias e Tecnologia das Radiacoes, Minerais e Materiais; Mourao, Arnaldo P. [Centro Federal de Educacao Tecnologica de Minas Gerais (CEFET/MG), Belo Horizonte, MG (Brazil); Alonso, Thessa C.; Silva, Teogenes A. da [Centro de Desenvolvimento da Tecnologia Nuclear (CDTN/CNEN-MG), Belo Horizonte, MG (Brazil)

    2010-07-01

    For the optimization of the patient dose in computed tomography (CT), the Brazilian legislation only established the diagnostic reference levels (DRL's) in terms of Multiple Scan Average Dose (MSAD) in a typical adult as a parameter of quality control of CT scanners. Conformity to the DRL's can be verified by measuring the dose distribution in CT scans and MSAD determination. An analysis of the quality of CT scans of the metropolitan region of Belo Horizonte is necessary by conducting pertinent tests to the study that are presented in the ANVISA (National Agency of Sanitary Vigilance) Guide. The purpose of this study is to investigate, in a chest scan, the variation of dose in CT. To measure the dose profile are used lithium fluoride thermoluminescent dosimeters (TLD-100 Rod) distributed in cylinders positioned in peripheral and central regions of a phantom of polymethylmethacrylate (PMMA). The data obtained allow us to observe the variation of the dose profile inside the phantom. The peripheral region shows higher dose values than the central region. The longitudinal variation can be observed and the maximum dose was recorded at the edges of the phantom (41,58{+-}5,10) mGy at the midpoint of the longitudinal axis. The results will contribute to disseminate the proper procedure and optimize the dosimetry and the tests of quality control in CT, as well as make a critical analysis of the DRL's. (author)

  19. Soil structure changes evaluated with computed tomography;Mudancas na estrutura do solo avaliada com uso de tomografia computadorizada

    Energy Technology Data Exchange (ETDEWEB)

    Pires, Luiz Fernando [Universidade Estadual de Ponta Grossa (UEPG), PR (Brazil). Dept. de Fisica; Bacchi, Osny Oliveira Santos, E-mail: osny@cena.usp.b [Centro de Energia Nuclear na Agricultura (CENA/USP), Piracicaba, SP (Brazil)

    2010-04-15

    The objective of this work was to evaluate in millimetric scale changes in soil bulk density and porosity, using the gamma-ray computed tomography in soil samples with disturbed structure due to wetting and drying (W-D) cycles. Soil samples with 98.1 cm{sup 3} were sieved using a 2 mm mesh and homogeneously packed in PVC cylinders. Soil samples were submitted to 1, 2, and 3 W-D cycles. Control samples were not submitted to W-D cycles. After repetitions of W-D cycles, soil sample porosity decreased and soil layers became denser. Computed tomography allowed a continuous analysis of soil bulk density and also soil porosity along millimetric (0.08 cm) layers, what cannot be provided by traditional methods used in soil physics. (author)

  20. Pulmonary leukemic involvement: high-resolution computed tomography evaluation; Comprometimento pulmonar nas leucemias: avaliacao por tomografia computadorizada de alta resolucao

    Energy Technology Data Exchange (ETDEWEB)

    Oliveira, Ana Paola de [Universidade Federal, Rio de Janeiro, RJ (Brazil). Faculdade de Medicina. Programa de Pos-graduacao em Radiologia; Marchiori, Edson [Universidade Federal Fluminense, Niteroi, RJ (Brazil). Dept. de Radiologia]. E-mail: edmarchiori@bol.com.br; Souza Junior, Arthur Soares [Faculdade de Medicina de Sao Jose do Rio Preto (FAMERP), SP (Brazil). Dept. de Radiologia

    2004-12-01

    Objective: To evaluate the role of high-resolution computed tomography (HRCT) in patients with leukemia and pulmonary symptoms, to establish the main patterns and to correlate them with the etiology. Materials and Methods: This is a retrospective study of the HRCT of 15 patients with leukemia and pulmonary symptoms. The examinations were performed using a spatial high-resolution protocol and were analyzed by two independent radiologists. Results: The main HRCT patterns found were ground-glass opacity (n=11), consolidation (n=9), airspace nodules (n=3), septal thickening (n=3), tree-in-bud pattern (n=3), and pleural effusion (n=3). Pulmonary infection was the most common finding seen in 12 patients: bacterial pneumonia (n=6), fungal infection (n = 4), pulmonary tuberculosis (n=1) and viral infection (n=1). Leukemic pleural infiltration (n=1), lymphoma (n=1) and pulmonary hemorrhage (n=1) were detected in the other three patients. Conclusion: HRCT is an important tool that may suggest the cause of lung involvement, its extension and in some cases to guide invasive procedures in patients with leukemia. (author)

  1. Unilateral pulmonary veins atresia: evaluation by computed tomography; Atresia unilateral das veias pulmonares: avaliacao por tomografia computadorizada

    Energy Technology Data Exchange (ETDEWEB)

    Eifer, Diego Andre; Arsego, Felipe Veras, E-mail: felipesoarestorres@gmail.com [Hospital de Clinicas de Porto Alegre (HCPA), RS (Brazil). Serv. de Radiologia; Torres, Felipe Soares [Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS (Brazil). Escola de Medicina

    2013-11-15

    Unilateral pulmonary vein atresia is a rare congenital condition. In addition to cardiac malformations or pulmonary hypertension, patients may present with recurrent pulmonary infections or hemoptysis in childhood or adolescence. The authors report a case where the typical findings of such condition were observed at computed tomography in an adult patient. (author)

  2. Development of conditions radiation in computed tomography - CT; Desenvolvimento das condicoes de radiacao em tomografia computadorizada - TC

    Energy Technology Data Exchange (ETDEWEB)

    Cardoso, Ricardo de Souza; Peixoto, Jose Guilherme Pereira, E-mail: ricardo@ird.gov.br [Instituto de Radioprotecao e Dosimetria (IRD/CNEN-RJ), Rio de Janeiro, RJ (Brazil). Lab. Nacional de Metrologia das Radiacoes Ionizantes

    2015-07-01

    The LNMRI is implementing the TC qualities, used in chambers calibration used in hospitals and clinics. Preliminary studies results showed a variation for RQT 9 Quality of 1,350 x 107 and 1,343 x 107 Gy/C within 1.61 and 1.70% expanded uncertainties evaluated. (author)

  3. Cholesteatoma: computed tomography and radiography in a dog; Colesteatoma: tomografia computadorizada e radiografia em cao com otite cronica

    Energy Technology Data Exchange (ETDEWEB)

    Belotta, Alexandra Frey; Babicsak, Viviam Rocco; Mamprim, Maria Jaqueline; Vulcano, Luiz Carlos, E-mail: a_fbelotta@yahoo.com.br [Universidade Estadual Paulista Julio de Mesquita Filho (FMVZ/UNESP), Botucatu, SP (Brazil). Faculdade de Medicina Veterinaria e Zootecnia . Dept. de Reproducao Animal e Radiologia Veterinaria; Arruda, Vanesa Kutz de; Amorim, Rogerio Martins [Universidade Estadual Paulista Julio de Mesquita Filho (FMVZ/UNESP), Botucatu, SP (Brazil). Faculdade de Medicina Veterinaria e Zootecnia. Dept. de Clinica Veterinaria

    2012-07-01

    Cholesteatoma, a rare and/or misdiagnosed disease, results of a serious complication in dogs with chronic otitis. This article describes a case of a dachshund sent to the veterinary hospital presenting signs of cognitive dysfunction associated to peripheral neuropathy of the facial nerve on the right side. At radiography, an enlargement and thickness of the contours associated with loss of anatomical definition of the right tympanic bulla compared to the left was seen. At tomography, this enlargement and thickness were seen with better definition, besides the fulfilling by hyperdense calcified content, bullae osteolysis and temporal bone sclerosis at the same side. (author)

  4. Lipoid pneumonia: computed tomography findings - a case report; Pneumonia lipidica: aspectos na tomografia computadorizada - relato de caso

    Energy Technology Data Exchange (ETDEWEB)

    Farias, Janos; Martins, Erick Malheiro Leoncio; Pozes, Aline Serfaty; Marchiori, Edson [Universidade Federal Fluminense, Niteroi, RJ (Brazil). Dept. de Radiologia; Fialho, Suzane Mansur [Clinica Radiologica Emilio Amorim, Rio de Janeiro, RJ (Brazil)

    2004-02-01

    The authors report a case of lipoid pneumonia in an 80 year old man with chronic constipation in regular use of mineral oil as a laxative. According to his family, he experienced coughing episodes when he took his medication. He also presented dyspnoea at rest and diminished consciousness levels. Chest radiographs showed a consolidation area in the posterior segment of right upper lobe, which did not change on successive exams. High resolution computed tomography demonstrated low-density consolidation with negative Hounsfield units (-29 to -83 UH) and ground-glass opacities in the right upper lobe and inferior lobes. These opacities predominated in the posterior regions of the lungs. The diagnosis was confirmed by the presence of oil material on bronchoalveolar washing. The patient was advised to discontinue the ingestion of mineral oil and did not return for follow-up. (author)

  5. Nasal polyps

    Science.gov (United States)

    ... BS, Burks AW, et al, eds. Middleton's Allergy: Principles and Practice . 8th ed. Philadelphia, PA: Elsevier Saunders; 2014:chap 43. Becker SS. Surgical management of polyps in the treatment of nasal airway ...

  6. Abdominal aorta morphometric study for endovascular treatment of aortic aneurysms: comparison between spiral CT and angiography Estudo morfométrico da aorta abdominal para tratamento endovascular dos aneurismas aórticos: comparação entre tomografia helicoidal e angiografia

    Directory of Open Access Journals (Sweden)

    Gaudencio Espinosa

    2002-12-01

    Full Text Available PURPOSE: To compare the computed tomography and angiography study of abdominal aortic aneurysms for posterior endograft implant. METHOD: From June 1997 to March 2001, 113 patients with abdominal aortic aneurysm were submitted to study of the aorto-iliac axis with abdominal spiral computed tomography and angiography with calibrated catheter. The patient's ages ranged from 51 and 88 years (mean: 69. There were 104 males and nine females. RESULTS: When comparing the mean computed tomography and angiography diameters, we observed that there was a statistical difference for the infra-renal neck (p0.05. When comparing the mean lengths, we observed that there was a statistical difference for the aortic infra-renal neck (pOBJETIVOS: Este trabalho visa comparar a acurácia da tomografia computadorizada e da angiografia para avaliar os aneurismas de aorta abdominal (AAA para posterior implante de endoprótese vascular. MÉTODO: De junho de 1997 até março de 2001, foram atendidos 113 pacientes portadores de AAA, tendo sido submetidos a estudo por tomografia helicoidal computadorizada de abdome e pelve e angiografia com cateter centimetrado do eixo arterial aorto-ilíaco. A idade dos pacientes variou entre 51 e 88 anos (S:69a., sendo 104 do sexo masculino e nove do feminino. RESULTADOS: Quando comparadas as médias dos diâmetros aferidas pela tomografia computadorizada e pela angiografia, notou-se que a diferença do diâmetro foi significativa para o colo aórtico infra-renal (r 0,05. Quando comparadas as médias das extensões aferidas pela tomografia computadorizada e pela angiografia, notou-se que a diferença das extensões foi significativa para o colo aórtico infra-renal (r < 0,05, para a distância entre a artéria renal e a bifurcação aórtica (r < 0,05 e para as artérias ilíacas comuns (r < 0,05. A comparação entre as médias também foi significativa para a extensão entre a artéria renal e a artéria ilíaca interna (r < 0

  7. A tomografia de córnea e segmento anterior na propedêutica do exame complementar na avaliação de ectasia

    Directory of Open Access Journals (Sweden)

    Bruno de Freitas Valbon

    2013-02-01

    Full Text Available Descrevemos a importância da tomografia de córnea e segmento anterior na propedêutica do exame complementar na avaliação de ectasia. Esta descrição da interpretação clínica dos índices da tomografia de córnea e segmento anterior (Pentacam - Oculus, Wetzlar, Germany neste relato de caso, demonstra a relevância de uma nova tecnologia na avaliação da córnea e segmento anterior na suspeita de ceratocone. O diagnóstico de ceratocone foi excluído pela análise dos índices tomográficos de ectasia. Detectou-se assimetria entre os lados nasal e temporal por meio da avaliação do mapa de profundidade de câmara anterior. No exame biomicroscópico sob midríase foi constatado subluxação do cristalino, sendo assim devemos estar atentos não somente aos índices tomográficos corneanos na avaliação do exame complementar e sim analisarmos outros dados importantes oferecidos pela tomografia de córnea e segmento anterior.

  8. Nasal chondromesenchymal hamartoma with no nasal symptoms.

    LENUS (Irish Health Repository)

    Uzomefuna, Vincent

    2012-01-01

    The authors present a case of nasal chondromesenchymal hamartoma (NCMH) in an 8-year-old boy with a 4-month history of frontal headache and no symptoms of nasal obstruction, rhinorrhoea or postnasal drip. An ENT examination as well as ophthalmology assessment presented normal results. CT scan showed a lesion involving the sphenoid and ethmoid sinuses. The patient had an endoscopic resection of the lesion that was confirmed histologically to be a NCMH. Though NCMH is known to present usually in infants with obstructing nasal mass, an unusual presentation of a patient with throbbing headache without any nasal symptoms is reported here.

  9. Nasal mucosal biopsy

    Science.gov (United States)

    Biopsy - nasal mucosa; Nose biopsy ... to fast for a few hours before the biopsy. ... Nasal mucosal biopsy is usually done when abnormal tissue is seen during examination of the nose. It may also be done ...

  10. Testosterone Nasal Gel

    Science.gov (United States)

    Testosterone nasal gel is used to treat symptoms of low testosterone in men who have hypogonadism (a condition in which the ... does not produce enough natural testosterone). Testosterone nasal gel is used only for men with low testosterone ...

  11. Tumores intracranianos em pacientes encaminhados para estudos por tomografia de coerência óptica como portadores de glaucoma sem hipertensão ocular: relato de dois casos Intracranial tumors in patients referred for optical coherence tomography examination as glaucoma suspects: case report

    Directory of Open Access Journals (Sweden)

    Laurentino Biccas Neto

    2009-10-01

    Full Text Available A tomografia de coerência óptica (OCT tem se mostrado muito útil na avaliação de pacientes com glaucoma. São relatadas duas pacientes referidas com a suspeita de glaucoma sem hipertensão para avaliação por tomografia de coerência óptica que, na verdade, eram portadoras de tumores intracranianos - um cordoma de clivo no primeiro caso e um craniofaringeoma no segundo. Os achados à tomografia de coerência óptica - diminuição difusa da espessura da camada de fibras nervosas circumdiscais desproporcionalmente acentuada nos setores nasal e temporal - levantaram a suspeita de acometimento na região do quiasma e permitiram o diagnóstico destes importantes tumores intracranianos.Optical coherence tomography (OCT has proved to be a very valuable tool in the assessment of patients with glaucoma. In this report, intracranial tumors were discovered in two glaucoma suspects referred for diagnostic confirmation by OCT - a clivus chordoma and a craniopharyngeoma. Optical coherence tomography findings - marked asymmetrical diffuse attenuation of the peripapillary nerve fiber layer in nasal and temporal sectors - raised concerns about lesions in chiasmatic region and permitted the timely diagnosis of these intraocular tumors.

  12. Evaluation of ambient radiation levels in positron emission tomography/computed tomography in microPET/CT laboratory; Avaliacao dos niveis de radiacao ambiental no laboratorio de tomografia por emissao de positrons acoplada a tomografia computadorizada, microPET/CT

    Energy Technology Data Exchange (ETDEWEB)

    Sarmento, Daniele Martins

    2016-11-01

    Micro PET/CT scanner is an essential tool generally used for small animal molecular imaging. Fluorine-18-labeled fluorodeoxyglucose is the most widely used radioisotope in this technique. The present study aimed to evaluate the radiation levels in a micro PET/CT research laboratory of the Radiopharmacy Center at IPEN-CNEN / SP, in order to accomplish both national standards and international recommendations. The radioprotection team has classified the laboratory as supervised area; even this laboratory does not require the adoption of specific measures for protection and safety, should be done regular re-evaluation of the conditions of occupational exposures. Workplace monitoring and individual control assessment were carried out to ensure the radiological protection of all workers directly involved in handling the scanner. Initially, there was conducted a radiometric survey, as well as measurements of the external radiation level in the workplace and its surroundings. To achieve this goal, there were placed nine thermoluminescent dosimeters of CaSO{sub 4}:Dy in preselected locations. Monthly evaluations of the occupationally exposed individuals were carried out through the use of TL dosimeters, ported in the workers' chest. Moreover, whole body measurements were performed every six months. The study period was about two-years which started in April 2014. All tests to evaluate micro PET/CT performance were based on the standard protocol of the equipment in accordance with the standard developed by the Animal PET Standard Task Force. Present study's results demonstrated that the ambient radiation levels (ambient and effective estimated radiation dose), as well as the effective shielding equipment are both adequate. This study emphasizes that it is essential to strictly follow the principles of radioprotection in workplace, whenever researches involve radioactive unsealed sources. (author)

  13. Cone beam computed tomography in veterinary dentistry: description and standardization of the technique; Tomografia computadorizada de feixe conico na odontologia veterinaria: descricao e padronizacao da tecnica

    Energy Technology Data Exchange (ETDEWEB)

    Roza, Marcello R. [Universidade Federal de Goias (UFG), Goianai, GO (Brazil)], e-mail: marcelloroza@gmail.com; Silva, Luiz A.F.; Fioravanti, Maria C. S. [Universidade Federal de Goias (UFG), Goiania, GO (Brazil). Escola de Veterinaria. Dept. de Medicina Veterinaria; Januario, Alessandro L. [International Team for Implantology (ITI), Sao Paulo, SP (Brazil); Barriviera, Mauricio [Universidade Catolica de Brasilia (UCB), DF (Brazil). Faculdade de Odontologia. Dept. de Radiologia; Oliveira, Alexandre C.A. [Faculdade de Odontologia Sao Leopoldo Mandic, Campinas, SP (Brazil)

    2009-08-15

    Eleven dogs and four cats with buccodental alterations, treated in the Centro Veterinario do Gama, in Brasilia, DF, Brazil, were submitted to cone beam computed tomography. The exams were carried out in a i-CAT tomograph, using for image acquisition six centimeters height, 40 seconds time, 0.2 voxel, 120 kilovolts and 46.72 milli amperes per second. The ideal positioning of the animal for the exam was also determined in this study and it proved to be fundamental for successful examination, which required a simple and safe anesthetic protocol due to the relatively short period of time necessary to obtain the images. Several alterations and diseases were identified with accurate imaging, demonstrating that cone beam computed tomography is a safe, accessible and feasible imaging method which could be included in the small animal dentistry routine diagnosis. (author)

  14. Clinical manifestations in patients with computerized tomography diagnosis of neurocysticercosis; Manifestacoes clinicas de pacientes com diagnostico de neurocisticercose por tomografia computadorizada

    Energy Technology Data Exchange (ETDEWEB)

    Pfuetzenreiter, Marcia Regina [Universidade do Estado de Santa Catarina (UDESC), Florianopolis, SC (Brazil). Dept. de Medicina Veterinaria Preventiva e Tecnologia]. E-mail: a2mrp@cav.udesc.br; Avila-Pires, Fernando Dias de [Santa Catarina Univ., Florianopolis, SC (Brazil). Dept. de Saude Publica

    1999-09-01

    A survey was conducted in the urban area of Lages using patients who had been submitted to a computed tomography of the skull in the period of March-December, 1996, for different reasons. Forty-two patients with a provisional diagnosis of neurocysticercosis, and 57 negatives were personally interviewed by one of the authors (Pfuetzenreiter), using a semi-structured procedure. More individuals with a provisional diagnostic of neurocysticercosis reported clinical manifestations related to this infection than those found negative. this difference is more marked among women, except in relation to convulsions, more frequently reported by men (19.05%) than by women (7.14%). The greater percentage of inactive forms (83.33%0 and a longer history of perceived symptoms among those positives suggest that the condition is not new. (author)

  15. Diffuse lung neoplasms. Correlation between high resolution computerized tomography and anatomopathology; Neoplasias pulmonares difusas: correlacao da tomografia computadorizada de alta resolucao com a anatomopatologia

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    Marchiori, Edson [Universidade Federal Fluminense, Niteroi, RJ (Brazil). Dept. de Radiologia; Irion, Klaus L. [Complexo Hospitalar Santa Casa de Porto Alegre, RS (Brazil). Servico de Radiologia do Pavilhao Pereira Filho; Souza Junior, Arthur Soares [Faculdade de Medicina de Sao Jose do Rio Preto, SP (Brazil)]. E-mail: edmarchiori@zipmail.com.br

    2002-08-01

    A short comparative evaluation study between high resolution computerized tomography and anatomopathologic findings is presented. The association of these two diagnostic techniques is discussed as a factor to enhance the accuracy of diffuse lung diseases, such as carcinomatous lymphangitis, Kaposi's Sarcoma, lymphomas, hematogenic metastases, bronchiole-alveolar carcinoma and leukemia. (MAC)

  16. Multislice helical computed tomography in the evaluation of lumbar spine diseases; Tomografia computadorizada 'multislice' no diagnostico das afeccoes da coluna lombar

    Energy Technology Data Exchange (ETDEWEB)

    Rosemberg, Laercio Alberto; Rios, Adriana Martins; Almeida, Milena Oliveira [Hospital Israelita Albert Einstein, Sao Paulo, SP (Brazil)]. E-mail: laercio@einstein.br; Garbaccio, Viviane Ladeira; Kim, Nelson Ji Tae; Daniel, Mauro Miguel; Funari, Marcelo Buarque de Gusmao [Hospital Israelita Albert Einstein, Sao Paulo, SP (Brazil). Dept. de Imagem

    2003-06-01

    Multislice computed tomography has advantages in comparison to conventional computer tomography such as reduction in study time, lower radiation dose, fewer metal artifacts and high quality multiplanar reformatting and three-dimensional reconstructions. We reviewed approximately 300 lumbar spine examinations and selected the most illustrative cases including congenital anomalies, degenerative lesions, spinal infections, neoplasms traumatic injuries, spondylolysis and postoperative changes. In the majority of the cases the high quality multiplanar reformatted and volume reconstructions of multislice computed tomography allowed better evaluation of the lesions, particularly in the cases of complex anatomy (author)

  17. Automatic 2D segmentation of airways in thorax computed tomography images; Segmentacao automatica 2D de vias aereas em imagens de tomografia computadorizada do torax

    Energy Technology Data Exchange (ETDEWEB)

    Cavalcante, Tarique da Silveira; Cortez, Paulo Cesar; Almeida, Thomaz Maia de, E-mail: tarique@lesc.ufc.br [Universidade Federal do Ceara (UFC), Fortaleza, CE (Brazil). Dept. de Engenharia de Teleinformatica; Felix, John Hebert da Silva [Universidade da Integracao Internacional da Lusofonia Afro-Brasileira (UNILAB), Redencao, CE (Brazil). Departamento de Energias; Holanda, Marcelo Alcantara [Universidade Federal do Ceara (UFC), Fortaleza, CE (Brazil). Fac. de Medicina

    2013-07-01

    Introduction: much of the world population is affected by pulmonary diseases, such as the bronchial asthma, bronchitis and bronchiectasis. The bronchial diagnosis is based on the airways state. In this sense, the automatic segmentation of the airways in Computed Tomography (CT) scans is a critical step in the aid to diagnosis of these diseases. Methods: this paper evaluates algorithms for airway automatic segmentation, using Neural Network Multilayer Perceptron (MLP) and Lung Densities Analysis (LDA) for detecting airways, along with Region Growing (RG), Active Contour Method (ACM) Balloon and Topology Adaptive to segment them. Results: we obtained results in three stages: comparative analysis of the detection algorithms MLP and LDA, with a gold standard acquired by three physicians with expertise in CT imaging of the chest; comparative analysis of segmentation algorithms ACM Balloon, ACM Topology Adaptive, MLP and RG; and evaluation of possible combinations between segmentation and detection algorithms, resulting in the complete method for automatic segmentation of the airways in 2D. Conclusion: the low incidence of false negative and the significant reduction of false positive, results in similarity coefficient and sensitivity exceeding 91% and 87% respectively, for a combination of algorithms with satisfactory segmentation quality. (author)

  18. Anatomic relationship of the optic nerve channel with sphenoid al sinus: a computed tomography study; Relacao anatomica do nervo optico com o seio esfenoidal: estudo por tomografia computadorizada

    Energy Technology Data Exchange (ETDEWEB)

    Dias, Paulo Cesar J. [Universidade Federal de Sao Paulo (UNIFESP/EPM), SP (Brazil); Albernaz, Pedro Luiz M. [Universidade Federal de Sao Paulo (UNIFESP/EPM), SP (Brazil). Dept. de Otorrinolaringologia e Disturbios da Comunicacao Humana; Yamashida, Helio K. [Universidade Federal de Sao Paulo (UNIFESP/EPM), SP (Brazil). Dept. de Diagnostico por Imagem

    2004-09-15

    The sphenoid sinus, out of the facial sinuses, is certainly the most neglected as far as diagnosis is concerned. The surgical approach requires a detailed anatomical knowledge, considering the serious complications resulting from injuries of vital structures adjacent to this region. Aim: the objective of our research is to evaluate the anatomic relationship of the optic nerve with the sphenoid sinus making use of the computed tomography. Study design: series report. Material and method: the authors present a retrospective analysis of 203 computed tomographies of facial sinus belonging to individuals of both sexes aged 14 and over. The examinations were evaluated observing the course of the optic nerve, obtained through the degree of its projection on the wall of the sphenoid sinus. The method used was the modified classification of Delano, evaluating the absence of bone reduction (dehiscence) of the optic nerve in the sphenoid sinus. We analysed the degree of pneumatization of the sphenoid sinus, using Hammer's classification adapted by Guerrero, apart from the pneumatization of the anterior clinoidal process and pterigoid and the presence of the Onodi cell. Results: most of the patients (78.96%) presented their optic nerve with a type 1 course. Type 2 was observed in 16.83% of the patients, type 3 in 3.47% and type 4 in 0.74%. The presence of dehiscence of the optic nerve in the wall of the sphenoid sinus was evidenced in 21.29% of the cases. Related to pneumatization, we noticed that the pre-selar type was observed in 6.44%, the post-selar type appeared in 39.11%, the selar type appeared in 54.45%, and the apneumatized type was not observed in any of the cases. The pneumatization of the anterior clinoidal process was verified in 10.64% of the cases, while the pterigoid process was apparent in 21.29% of the cases. The Onodi cell (sphenoetmoidal) was found in 7.92% of the cases. Conclusion: the presence of dehiscence of the optic nerve is related with the degree of pneumatization of the anterior clinoid and the pterigoid processes, the presence of the Onodi cell (sphenoetmoidal) and course types 2, 3 and 4 considered the relationship between the optic nerve and the sphenoid sinus. (author)

  19. Local behavior and lymph node metastases of Wilms' tumor: accuracy of computed tomography; Comportamento local e metastases linfonodais do tumor de Wilms: acuracia da tomografia computadorizada

    Energy Technology Data Exchange (ETDEWEB)

    Silva, Eduardo Just da Costa e, E-mail: eduardojust@oi.com.br [Universidade Federal de Pernambuco (UFPE), Recife, PE (Brazil); Instituto Materno Infantil de Pernambuco (IMIP), Recife, PE (Brazil); Silva, Giselia Alves Pontes da [Universidade Federal de Pernambuco (UFPE), Recife, PE (Brazil). Dept. Maternal Infantil

    2014-01-15

    Objective: to evaluate the accuracy of computed tomography for local and lymph node staging of Wilms' tumor. Materials and methods: each case of Wilms' tumor was evaluated for the presence of abdominal lymph nodes by a radiologist. Signs of capsule and adjacent organ invasion were analyzed. Surgical and histopathological results were taken as the gold standard. Results: sensitivity was 100% for both mesenteric and retroperitoneal lymph nodes detection, and specificity was, respectively, 12% and 33%, with positive predictive value of 8% and 11% and negative predictive value of 100%. Signs of capsular invasion presented sensitivity of 87%, specificity of 77%, positive predictive value of 63% and negative predictive value of 93%. Signs of adjacent organ invasion presented sensitivity of 100%, specificity of 78%, positive predictive value of 37% and negative predictive value of 100%. Conclusion: computed tomography tumor showed low specificity and low positive predictive value in the detection of lymph node dissemination. The absence of detectable lymph nodes makes their presence unlikely, and likewise regarding the evaluation of local behavior of tumors. (author)

  20. Evaluation of the soil-seed environment through computerized tomography; Avaliacao do ambiente solo-semente por meio da tomografia computadorizada

    Energy Technology Data Exchange (ETDEWEB)

    Modolo, Alcir Jose [Universidade Tecnologica Federal do Parana (UTFPR), Pato Branco, PR (Brazil)). E-mail: alcir@ufpr.edu.br; Fernandes, Haroldo Carlos [Universidade Federal de Vicosa (UFV), MG (Brazil). Dept. de Engenharia Agricola]. E-mail: haroldo@ufv.br; Naime, Joao de Mendonca [Embrapa Instrumentacao Agropecuaria, Sao Carlos, SP (Brazil)]. E-mail: naime@cnpdia.embrapa.br; Schaefer, Carlos Ernesto G.R. [Universidade Federal de Vicosa (UFV), MG (Brazil). Dept. de Solos]. E-mail: carlos.schaefer@ufv.br; Santos, Nerilson Terra [Universidade Federal de Vicosa (UFV), MG (Brazil). Dept. de Informatica]. E-mail: nsantos@ufv.br; Silveira, Joao Cleber Modernel da [Universidade Federal de Vicosa (UFV), MG (Brazil). Mecanizacao Agricola]. E-mail: jcmodernel@uol.com.br

    2008-03-15

    The physical conditioning of the soil around seeds is of great importance for an adequate initial development of a crop, ensuring a healthy plant population. A suitable soil-seed contact is a prerequisite for a fast crop germination and good establishment. In this study, computerized tomography of millimeter resolution was used to determine the soil-seed environment in a no tillage system, immediately after soybean planting. A split plot design was used, in which the plots consisted of three contents of soil water, corresponding to 0.27; 0,31 and 0.36 kg kg{sup -1}, respectively, and the split plots of four load levels applied by the compaction wheel, corresponding to 0, 50, 90 and 140 N, respectively. It was used a random block design, with four replications. The medium soil density in the seed area and the medium density profile in the sowing furrow were evaluated. According to the results, it may be concluded that: the loads applied by the compaction wheel increased soil density at the vertical planting level beneath planting depth as compared with values obtained before planting, and; the combination of wheel loads and soil water contents did not influence the mean soil density in the seed area. (author)

  1. Radiation condition in computerized tomography (CT): determination and calibration of dosemeters; Condicoes de radiacao em tomografia computadorizada (TC): determinacao e calibracao de dosimetros

    Energy Technology Data Exchange (ETDEWEB)

    Adrade, L.C.; Peixoto, J.G.P., E-mail: lucio-andrade@hotmail.com [Instituto de Radioprotecao e Dosimetria (IRD/CNEN-RJ), Rio de Janeiro, RJ (Brazil)

    2016-07-01

    RQT is the standard for radiation conditions in computed tomography . It simulates a beam unrelieved of a CT scanner . The camera pencil ionization dosimeter is used in CT. The LNMRI become known characterization of RQT radiation conditions and the secondary standard calibration for type pencil ionisation chambers in its lab. The obtained beam has the characteristics required by IEC 61267. The results of the calibration presented combined uncertainty expanded to 95.45% from 2.22% . (author)

  2. Computed tomography with thermal neutrons and gaseous position sensitive detector; Tomografia computadorizada com neutrons termicos e detetor a gas sensivel a posicao

    Energy Technology Data Exchange (ETDEWEB)

    Souza, Maria Ines Silvani

    2001-12-01

    A third generation tomographic system using a parallel thermal neutron beam and gaseous position sensitive detector has been developed along three discrete phases. At the first one, X-ray tomographic images of several objects, using a position sensitive detector designed and constructed for this purpose have been obtained. The second phase involved the conversion of that detector for thermal neutron detection, by using materials capable to convert neutrons into detectable charged particles, testing afterwards its performance in a tomographic system by evaluation the quality of the image arising from several test-objects containing materials applicable in the engineering field. High enriched {sup 3} He, replacing the argon-methane otherwise used as filling gas for the X-ray detection, as well as, a gadolinium foil, have been utilized as converters. Besides the pure enriched {sup 3} He, its mixture with argon-methane and later on with propane, have been also tested, in order to evaluate the detector efficiency and resolution. After each gas change, the overall performance of the tomographic system using the modified detector, has been analyzed through measurements of the related parameters. This was done by analyzing the images produced by test-objects containing several materials having well known attenuation coefficients for both thermal neutrons and X-rays. In order to compare the performance of the position sensitive detector as modified to detect thermal neutrons, with that of a conventional BF{sub 3} detector, additional tomographs have been conducted using the last one. The results have been compared in terms of advantages, handicaps and complementary aspects for different kinds of radiation and materials. (author)

  3. Multidetector-row helical computed tomography in the evaluation of cervical spine disorders; Tomografia computadorizada multislice no diagnostico das afeccoes da coluna cervical

    Energy Technology Data Exchange (ETDEWEB)

    Rosemberg, Laercio Alberto; Almeida, Milena Oliveira; Rios, Adriana Martins; Garbaccio, Viviane Ladeira; Kim, Nelson Ji Tae; Daniel, Mauro Miguel; Funari, Marcelo Buarque de Gusmao [Hospital Israelita Albert Einstein, Sao Paulo, SP (Brazil). Dept. de Imagem]. E-mail: laercio@einstein.br

    2003-07-01

    Multidetector-row computed tomography (MRCT) has advantages in comparison to conventional helical computed tomography, such as reduction of study time, lower radiation doses, fewer metallic artifacts and high quality multiplanar reformatting and three dimensional reconstructions. We reviewed 150 cervical spine examinations and selected the most illustrative cases including congenital anomalies, degenerative lesions, spinal infections, neoplasms, traumatic injuries and postoperative abnormalities. The quality of multiplanar reformatting and volume reconstructions of the MRCT made the detection and evaluation of most of cases with complex anatomy easier and more precise. (author)

  4. Hérnia encarcerada em orifício de trocarte lateral diagnosticada por tomografia computadorizada Incarcerated hernia in a lateral trocar site diagnosed by computed tomography

    Directory of Open Access Journals (Sweden)

    Gustavo Lopes de Carvalho

    2005-06-01

    Full Text Available Incisional hernia is an uncommon complication in laparoscopic surgery. The majority of the hernias are located in the umbilical site. Nevertheless, they can occur in the lateral trocar site, although they are rarely diagnosed. We report a case of a 55 year-old patient who underwent a videolaparoscopic hysterectomy and developed small bowel obstruction on the third postoperative day. This initially gave rise to the diagnosis of paralytic ileum. The definitive diagnosis of incarcerated hernia in the lateral trocar site was established after an abdominal computed tomography was performed.

  5. Bronchial asthma: correlation of high resolution computerized tomography findings with clinical data; Asma bronquica: correlacao de achados em tomografia computadorizada de alta resolucao com dados clinicos

    Energy Technology Data Exchange (ETDEWEB)

    Mogami, Roberto [Universidade do Estado, Rio de Janeiro, RJ (Brazil). Servico de Radiologia; Marchiori, Edson [Universidade Federal Fluminense, Niteroi, RJ (Brazil). Dept. de Radiologia; Kirk, Kennedy; Capone, Domenico [Universidade do Estado, Rio de Janeiro, RJ (Brazil). Servico de Pneumologia; Daltro, Pedro [Instituto Fernandes Figueira, Rio de Janeiro, RJ (Brazil). Servico de Radiologia

    1999-04-01

    In this work we did a sectional study of 31 asthmatic patients with several levels of disease severity, which were submitted to high resolution computed tomography of the thorax and spirometry, between the months of July, 1995 and August, 1997. The tomographic findings were correlated with the clinical classification of the patients and the most frequent tomographic findings were bronchial wall thickening, bronchial dilatation, air trapping, centrilobular opacities, cicatricial linear shadows, mucoid impaction, emphysema and atelectasis. In asthmatic patients of long duration we observed small airway disease and irreversible lesions as the predominant findings. In smoking patients there was no high frequency of emphysema. (author)

  6. Alterações estruturais da face e dos seios paranasais avaliados por tomografia computadorizada multislice em pacientes com leishmaniose mucosa tratada

    OpenAIRE

    Raphael Abegão de Camargo

    2014-01-01

    Introdução: No Brasil, a leishmaniose tegumentar americana (LTA) é uma importante antropozoonose endêmica na maioria das regiões do país. Apesar da expansão da doença nos últimos anos, a LTA continua a ser uma doença negligenciada. A leishmaniose mucosa (LM) tem como principal agente causador a Leishmania (V.) brasilienses, e habitualmente ocorre meses ou anos após a infecção cutânea sintomática ou assintomática. Aproximadamente 5% dos pacientes com leishmaniose cutânea não tratada adequadame...

  7. Prognostic value of pancreatic necrosis sites detected by abdominal CT scan; Valor prognostico das localizacoes das necroses pancreaticas pela tomografia computadorizada de abdome

    Energy Technology Data Exchange (ETDEWEB)

    Jukemura, Jose; Machado, Marcel Cerqueira Cesar; Penteado, Sonia; Monteiro da Cunha, Jose Eduardo; Pinotti, Henrique Walter [Sao Paulo Univ., SP (Brazil). Faculdade de Medicina

    1995-12-31

    Correlations between tomographic findings and the outcome of the disease was made in 49 patients with necrotizing pancreatitis submitted to surgical treatment. Mortality rate was 20.40% resulting mostly from sepsis and multiple organ failures. There was no correlation between APACHE II index and number of necrotic areas diagnosed by abdominal computed tomography although they were closely related with mortality. These findings suggest that different necrotic areas have different prognostic values. The root of the superior mesenteric artery and retropancreatic area were related to worst prognosis with 100% mortality rate. Incomplete necrotic tissue removal is the possible explanation for the high mortality rate. (author). 61 refs., 2 figs., 6 tabs.

  8. Idiopathic pulmonary fibrosis and collagen vascular diseases - high resolution CT findings; Pneumopatias intersticiais difusas idiopaticas e associadas a colagenoses - aspectos da tomografia computadorizada de alta resolucao

    Energy Technology Data Exchange (ETDEWEB)

    Ferreira Neto, Armando Leao; Mogami, Roberto [Universidade do Estado, Rio de Janeiro, RJ (Brazil). Centro Biomedico. Inst. de Radiologia; Marchiori, Edson [Universidade Federal Fluminense, Niteroi, RJ (Brazil). Inst. Biomedico. Dept. de Radiologia; Capone, Domenico [Universidade Estadual, Rio de Janeiro, RJ (Brazil). Dept. de Penumologia

    1996-09-01

    The aspects of the thorax high-resolution computed tomography of 15 patients with idiopathic pulmonary fibrosis and 11 patients with collagen vascular diseases are described and characterized mainly by the presence of reticular lesions with little cysts predominantly in the periphery and lower lobes. They may be associated with ground-glass lesions that, as usual, means areas of alveolitis. (author) 31 refs., 5 figs.

  9. Hypersensitivity pneumonitis (extrinsic allergic alveolitis): high-resolution computed tomography findings; Pneumonite por hipersensibilidade (alveolite alergica extrinseca): achados na tomografia computadorizada de alta resolucao

    Energy Technology Data Exchange (ETDEWEB)

    Almeida Junior, Jose Guiomar de; Marchiori, Edson [Universidade Federal Fluminense, Niteroi, RJ (Brazil). Faculdade de Ciencias Medicas. Dept. de Radiologia]. E-mail: edmarchiori@zipmail.com.br; Escuissato, Dante L. [Parana Univ., Curitiba, PR (Brazil). Dept. de Radiologia; Souza Junior, Arthur Soares [Faculdade de Medicina de Sao Jose do Rio Preto (FAMERP), SP (Brazil). Dept. de Radiologia; Gasparetto, Emerson L. [Parana Univ., Curitiba, PR (Brazil). Hospital de Clinicas; Nobre, Luiz Felipe [Santa Catarina Univ., Florianopolis, SC (Brazil); Irion, Klaus L. [Santa Casa de Misericordia de Porto Alegre, RS (Brazil). Pavilhao Pereira Filho. Servico de Radiologia

    2003-12-01

    Hypersensitivity pneumonitis, or extrinsic allergic alveolitis, is an immunologic disease of the lungs caused by inhaled chemicals or organics allergens. A lymphocytic inflammatory response in the peripheral airways and surrounding interstitial tissue occurs. In this study the high-resolution computed tomography findings of 13 patients with hypersensitivity pneumonitis were analyzed and discussed. The most frequent high-resolution computed tomography findings were: ground-glass opacities (92.3%), centrilobular nodules (38.4%) and air trapping (38.4%). Other findings included bronchiectasis (23.1%), consolidation (23.1%), crazy paving (7.7%), parenchymal bands (15.4%), linear opacities (7.7%), architectural distortion (7.7%), tracheal dilatation (7.7%), intralobular reticulate (7.7%), honeycombing (7.7%), emphysema (7.7%) and atelectasis (7.7%). In two of the 13 patients there was fibrosis (architectural distortion and honeycombing), which represents the chronic phase of the disease. (author)

  10. Bosniak classification of renal cystic lesions according to multidetector computed tomography findings; Classificacao de Bosniak das lesoes cisticas renais segundo achados na tomografia computadorizada multidetectores

    Energy Technology Data Exchange (ETDEWEB)

    Miranda, Christiana Maia Nobre Rocha de; Padilha, Igor Gomes; Farias, Lucas de Padua Gomes de; Rocha, Milzi Sarmento da, E-mail: maiachristiana@globo.com [Universidade Federal de Alagoas (UFAL), Maceio, AL (Brazil); Maranhao, Carol Pontes de Miranda; Santos, Carla Jotta Justo dos [Clinica de Medicina Nuclear e Radiologia de Maceio (MedRadiUS), Maceio, AL (Brazil)

    2014-03-15

    Renal cystic lesions are usually diagnosed in the radiologists' practice and therefore their characterization is crucial to determine the clinical approach to be adopted and prognosis. The Bosniak classification based on computed tomography findings has allowed for standardization and categorization of lesions in increasing order of malignancy (I, II, IIF, III and IV) in a simple and accurate way. The present iconographic essay developed with multidetector computed tomography images of selected cases from the archives of the authors' institution, is aimed at describing imaging findings that can help in the diagnosis of renal cysts. (author)

  11. Relationship between CT scans and serum tests for diagnosing tuberculosis; Relacao entre imagens de tomografia computadorizada e exames sericos no diagnostico da tuberculose

    Energy Technology Data Exchange (ETDEWEB)

    Oliveira, Marcela de; Pina, Diana R.; Giacomini, Guilherme; Alvarez, Matheus; Pavan, Ana Luiza M.; Pereira, Paulo C.M. [Universidade Estadual Paulista Julio de Mesquita Filho (UNESP), Botucatu, SP (Brazil)

    2014-07-01

    Tuberculosis (TB) is one of the oldest infectious diseases in the world and still affects humanity today. Since 1993, the World Health Organization (WHO) considers TB as a global emergency. The clinical history of the individual, the serum exams and particularly, the imaging examination of the thorax, are used for diagnostic confirmation and monitoring of disease. TB is a chronic disease that usually evolves with pulmonary sequelae that must be monitored. The exam of the image more precise to assess the radiological patterns found in these patients is high-resolution computed tomography (HRCT), which aids in medical diagnosis and permit the determination of the area affected by radiological abnormalities of pulmonary tuberculosis. The best known of such modifications by means of exams or more accurate techniques is of extreme importance. Therefore, this study aimed to show the quantification, performed by algorithms, of the areas affected by the radiological abnormalities of TB through the HRCT, and compared with serum exams. We studied 16 patients with confirmed diagnosis of TB. The serum exams evaluated included: hemoglobin, hematocrit, albumin, speed hemo sedimentation and C-reactive protein. With the values of serum exams we observed that patients have anemia, low albumin levels and inflammatory activity, corroborating imaging exams, which show severe impairment of lung area due to the inflammation caused by disease activity. (author)

  12. Auxílio da tomografia computadorizada no planejamento pré-operatório de pacientes portadores de escoliose idiopática do adolescente

    OpenAIRE

    Rodrigo Rezende; Igor Cardoso Machado; Diogo Miranda Barbosa; Priscila Rossi de Batista

    2010-01-01

    A escoliose idiopática do adolescente (EIA) é uma doença diagnosticada no início da puberdade. Ela apresenta etiologia indefinida e caracteriza-se pelo desvio lateral da coluna vertebral maior que 10°, associado à rotação do corpo vertebral. O uso de instrumentação de terceira geração produziu um melhor resultado na correção da curva do que as técnicas anteriores. Porém, ainda existem dificuldades técnicas no momento da passagem e da escolha dos parafusos pediculares, devido à angulação e ao ...

  13. Squamous cell carcinoma of the external auditory canal: computed tomography findings in six cases; Carcinoma espinocelular do conduto auditivo externo: estudo por tomografia computadorizada de seis casos

    Energy Technology Data Exchange (ETDEWEB)

    Gonzalez, Fabio Mota; Paes Junior, Ademar Jose de Oliveira; Tornin, Olger de Souza [Complexo Hospitalar Heliopolis, Sao Paulo, SP (Brazil). Servico de Diagnostico por Imagem]. E-mail: fmg961@yahoo.com.br; Souza, Ricardo Pires de [Complexo Hospitalar Heliopolis, Sao Paulo, SP (Brazil). Programa de Residencia Medica em Radiologia e Diagnostico por Imagem

    2005-05-15

    Objective: to evaluate the role of computed tomography in the assessment of deep extension of squamous cell carcinoma of the external auditory canal. Materials and methods: in the period between May 1995 and December 2003 six patients with squamous cell carcinoma of the external auditory canal were submitted to computed tomography scan at 'Hospital Heliopolis', Sao Paulo, SP, Brazil, including axial and coronal slices with soft tissue and bone algorithms. Results: thickening of the soft tissue of the external auditory canal was seen in all patients, bone erosion and invasion of the middle ear in five (83.3%), invasion of the mastoid and parotid gland in four (66.7%), invasion of the temporomandibular joint in three (50%), and invasion of the middle cranial fossa, carotid canal and cervical lymph node enlargement in two (33.3%) patients. Conclusion: assessment of deep extension of squamous cell carcinoma of the external auditory canal using computed tomography is useful for clinical staging of the disease allowing better therapeutic planning for these patients. (author)

  14. Computed tomography evaluation of autogenous graft in sinus lift surgery; Analise por tomografia computadorizada do enxerto autogeno na cirurgia de 'sinus lift'

    Energy Technology Data Exchange (ETDEWEB)

    Ajzen, Sergio Aron; Moscatiello, Rafael Andrade; Lima, Aida Maria Custodio de; Moscatiello, Vitoria Aparecida Muglia; Helio Kiitiro Yamashita [Universidade Federal de Sao Paulo (UNIFESP/EPM), SP (Brazil). Dept. de Diagnostico por Imagem; Mosacatiello, Rafael Muglia; Nishiguchi, Celso Itiro [Universidade Federal de Sao Paulo (UNIFESP/EPM), SP (Brazil). Disciplina de Tecnica Operatoria e Cirurgia Experimental; Alves, Maria Teresa de Seixas [Universidade Federal de Sao Paulo (UNIFESP/EPM), SP (Brazil). Disciplina de Anatomia Patologica

    2001-02-01

    The objective was to quantify bone formation within autogenous bone grafts and autogenous bone grafts in combination with platelet-rich plasma obtained either from apheresis or centrifugation using computed tomography. This prospective, double-blind study was conducted in 34 male and female adult patients (mean age of 28 years and 8 months), with either unilateral or bilateral pneumatization of the maxillary sinuses, requiring bone graft for dental implant. All patients were submitted to computed tomography examinations prior and six months after sinus lift surgery. Fifty-three maxillary sinuses were operated and divided into three distinct groups: autogenous bone graft, autogenous bone graft in combination with platelet-rich plasma obtained by centrifugation, and autogenous bone graft in combination with platelet-rich plasma obtained by apheresis. The results showed that computed tomography demonstrated bone growth in height and width between the initial and the follow-up computed tomography scans in all three groups. However, no statistical difference was found either for bone height or width. It was concluded that clinical evidence demonstrates the effectiveness of autogenous bone grafts, particularly when used in combination with bone growth factors such as platelet-rich plasma, which allow prosthetic and functional restoration of maxillofacial structures through fixation of dental implants. (author)

  15. Leukokoria in childhood: differential diagnosis using ultrasonography, computed tomography, and magnetic resonance imaging; Leucocoria na infancia: diagnostico diferencial por ultra-sonografia, tomografia computadorizada e ressonancia magnetica

    Energy Technology Data Exchange (ETDEWEB)

    Montandon Junior, Marcelo Eustaquio; Montandon, Cristiano [Colegio Brasileiro de Radiologia e Diagnostico por Imagem (CBR), Sao Paulo, SP (Brazil)]. E-mail: marmontandon@hotmail.com; Figueiredo, Sizenildo da Silva; Ribeiro, Flavia Aparecida de Souza; Nobrega, Bruno Barcelos da; Lobo, Leonardo Valadares Barbosa; Teixeira, Kim-Ir-Sen Santos [Goias Univ., Goiania (Brazil). Hospital das Clinicas. Servico de Diagnostico por Imagem e Anatomia Patologica; Jacob, Beatriz Mahmud [Goias Univ., Goiania (Brazil). Faculdade de Medicina. Radiologia e Diagnostico por Imagem

    2004-04-01

    Leukokoria is an abnormal pupillary reflex most commonly seen in children that usually results from an intra-ocular abnormality. The evaluation of a child with leukokoria should be performed particularly to rule out a retinoblastoma (the cause of leukokoria in half of the cases). The authors present the main clinical and imaging features for the diagnosis of the most common causes of leukokoria. (author)

  16. Computed tomography findings in patients with pulmonary hyalinizing granulomas: a case report; Granulomas hialinizantes pulmonares: aspectos na tomografia computadorizada - relato de caso

    Energy Technology Data Exchange (ETDEWEB)

    Marchiori, Edson [Universidade Federal Fluminense, Niteroi, RJ (Brazil). Dept. de Radiologia]. E-mail: edmarchiori@zipmail.com.br; Valiante, Paulo Marcos [Universidade Federal, Rio de Janeiro, RJ (Brazil). Faculdade de Medicina. Dept. de Patologia; Correia, Ana Helena Pereira; Carneiro, Leonardo Hoehl; Caldas, Carolina Rodrigues [Hospital Universitario Clementino Fraga Filho, Rio de Janeiro, RJ (Brazil). Servico de Anatomia Patologica; Souza Junior, Arthur Soares [Faculdade de Medicina de Sao Jose do Rio Preto (FAMERP), SP (Brazil). Dept. de Radiologia

    2003-12-01

    Hyalinizing granulomas are benign fibrotic lesions that generally present multiple nodules seen on radiological examinations, which are frequently cavitary and/or calcified lesions. We report a case of a 28 year-old-woman with hyalinizing granulomas probably secondary to a previous tuberculosis infection. Hyalinizing granulomas should be included in the differential diagnosis of patients with multiple pulmonary nodules. (author)

  17. When and why use unenhanced computed tomography in patients with acute abdomen; Tomografia computadorizada sem contraste intravenoso no abdome agudo: quando e por que usar

    Energy Technology Data Exchange (ETDEWEB)

    Freire Filho, Edison de Oliveira; D' Ippolito, Giuseppe; Szejnfeld, Jacob [Universidade Federal de Sao Paulo (UNIFESP/EPM), SP (Brazil). Dept. de Diagnostico por Imagem]. E-mail: eofilho@ig.com.br; Jesus, Paulo Eduardo Marinho de [Clinica Radiologica de Anapolis, GO (Brazil)

    2006-01-15

    The use of unenhanced computed tomography has been frequently recommended for the initial assessment of patients with clinical suspicion of acute abdomen instead of other diagnostic methods. The authors present a review of the literature on the main aspects, advantages, limitations and efficacy of unenhanced computed tomography for the diagnosis of acute appendicitis, renal colic, diverticulitis, acute pancreatitis, primary epiploic appendicitis, pneumoperitoneum and small bowel obstruction. The advantages and limitations of this technique are also discussed. (auth0008.

  18. Wavelets in quantification of liver tumors in contrasted computed tomography images; Wavelets na quantificacao de tumores de figado em exames contrastados de tomografia computadorizada

    Energy Technology Data Exchange (ETDEWEB)

    Rodrigues, Bruna T.; Alvarez, Matheus; Souza, Rafael T.F.; Miranda, Jose R.A., E-mail: matheus@ibb.unesp.br [Universidade Estadual Paulista Julio de Mesquita Filho (UNESP), Botucatu, SP (Brazil). Instituto de Biociencias. Departamento de Fisica e Biofisica; Romeiro, Fernando G. [Universidade Estadual Paulista Julio de Mesquita Filho (UNESP), Botucatu, SP (Brazil). Fac de Mediciana. Departamento de Clinica Medica; Pina, Diana R. de; Trindade, Andre Petean [Universidade Estadual Paulista Julio de Mesquita Filho (UNESP), Botucatu, SP (Brazil). Fac. de Medicina. Departamento de Doencas Tropicais e Diagnostico por Imagem

    2012-12-15

    This paper presents an original methodology of liver tumors segmentation, based on wavelet transform. A virtual phantom was constructed with the same mean and standard deviation of the intensity of gray presented by the measured liver tissue. The optimized algorithm had a sensitivity ranging from 0.81 to 0.83, with a specificity of 0.95 for differentiation of hepatic tumors from normal tissues. We obtained a 96% agreement between the pixels segmented by an experienced radiologist and the algorithm presented here. According to the results shown in this work, the algorithm is optimal for the beginning of the tests for quantification of liver tumors in retrospective surveys. (author)

  19. Lymphocytic interstitial pneumonia: correlation of high-resolution computed tomography findings with anatomopathology; Pneumonia intersticial linfocitica: correlacao da tomografia computadorizada de alta resolucao com a anatomopatologia

    Energy Technology Data Exchange (ETDEWEB)

    Marchiori, Edson; Damato, Simone [Universidade Federal Fluminense, Niteroi, RJ (Brazil). Dept. de Radiologia; Rodrigues, Rosana; Mendonca, Renato Goncalves de [Universidade Federal, Rio de Janeiro, RJ (Brazil). Hospital Universitario Clementino Fraga Filho. Servico de Radiodiagnostico; Valiante, Paulo Marcos [Universidade Federal, Rio de Janeiro, RJ (Brazil). Dept. de Patologia; Miyagui, Tizuko [Universidade Federal Fluminense, Niteroi, RJ (Brazil). Dept. de Patologia; Aide, Miguel Abidon [Universidade Federal Fluminense, Niteroi, RJ (Brazil). Disciplina de Pneumologia]. E-mail: edmarchiori@zipmail.com.br

    2002-08-01

    The purpose of this study is to report the main high-resolution computed tomography findings of two patients with lymphocytic interstitial pneumonia. High-resolution computed tomography findings were correlated with pathology findings of material obtained from open biopsies. One patient had diffuse ground glass opacities seen on high-resolution computed tomography whereas the other patient had peribroncovascular thickening. Anatomopathology studies showed that the main pattern was polyclonal lymphocyte interstitial infiltration, particularly along alveolar septa. The current study demonstrated a close correlation between high-resolution computed tomography and anatomopathology findings. (author)

  20. Pulmonary lymphomas: high-resolution computed tomography and anatomopathological correlation; Linfomas pulmonares: correlacao da tomografia computadorizada de alta resolucao com a anatomopatologia

    Energy Technology Data Exchange (ETDEWEB)

    Marchiori, Edson [Universidade Federal Fluminense, Niteroi, RJ (Brazil). Dept. de Radiologia]. E-mail: edmarchiori@zipmail.com.br; Valiant, Paulo Marcos [Universidade Federal, Rio de Janeiro, RJ (Brazil). Faculdade de Medicina. Dept. de Patologia; Gutierrez, Ana Luiza Telles de Miranda; Bodanese, Larissa [Hospital Universitario Clementino Fraga Filho, Rio de Janeiro, RJ (Brazil). Dept. de Radiologia; Souza Junior, Arthur Soares [Faculdade de Medicina de Sao Jose do Rio Preto, SP (Brazil)

    2002-02-01

    This paper describes the high-resolution computed tomography and anatomopathological findings of pulmonary lymphomas. We studied the chest high-resolution computed tomographs and histopathological data of 10 patients with biopsy-proven non-Hodgkin's or Hodgkin's disease. The most common radiologic findings in this series were areas of consolidation with air-bronchogram (n = 8). Others findings included multiple pulmonary nodules (n = 4), thickening of bronchovascular bundles (n =3) and foci of ground-glass attenuation (n =2). The present series results are consistent with the current available literature on radiographic appearance of the disease. The pathological correspondence of the areas of air space consolidation was alveolar filling by neoplastic cells, the thickening of bronchovascular bundles was secondary to lymphomatous cells infiltrates, and the areas of ground-glass attenuation corresponded to alveolar septal infiltration by these cells. (author)

  1. Aspects of pulmonary histiocytosis X on high resolution computed tomography; Aspectos da histiocitose X pulmonar na tomografia computadorizada de alta resolucao (TCAR)

    Energy Technology Data Exchange (ETDEWEB)

    Costa, N.S.S.; Castro Lessa Angela, M.T. de; Angelo Junior, J.R.L.; Silva, F.M.D.; Kavakama, J.; Carvalho, C.R.R. de; Cerri, G.G. [Sao Paulo Univ., SP (Brazil). Faculdade de Medicina. Hospital das Clinicas. Inst. do Coracao

    1995-01-01

    Pulmonary histiocytosis X is a disease that occurs in young adults and presents with nodules and cysts, mainly in upper lobes, with consequent pulmonary fibrosis. These pulmonary changes are virtually pathognomonic findings on high resolution computed tomography, that allows estimate the area of the lung involved and distinguish histiocytosis X from other disorders that also produces nodules and cysts. (author). 10 refs, 2 tabs, 6 figs.

  2. Pancreatite necro-hemorrágica: utilização da tomografia computadorizada como método diagnóstico auxiliar

    OpenAIRE

    2015-01-01

    O presente trabalho relata um caso de uma das formas mais graves de pancreatite aguda, a pancreatite necro- hemorrágica. Nessa condição, o paciente fica em uma linha tênue entre uma boa evolução e a queda do estado geral, com alta mortalidade. O paciente deu entrada no hospital com fortes dores em abdome superior. No exame tomográfico constatou-se pancreatite com sinais sugestivos de necrose, sendo tratado clinicamente por sete dias. Após manutenção radiológica do quadro, o paciente foi subme...

  3. Evaluation of dosimetry and image quality of computerized tomography abdomen protocols; Avaliacao de dose e qualidade da imagem em protocolos de abdomen em tomografia computadorizada

    Energy Technology Data Exchange (ETDEWEB)

    Maues, Nadine H.P.B.; Alves, Allan F.F.; Bacchim Neto, Fernando A.; Pina, Diana R. [Universidade Estadual Paulista Julio de Mesquita Filho (UNESP), Botucatu, SP (Brazil)

    2016-07-01

    In this study, we evaluate the dosimetry and image quality of computed tomography multislice abdomen protocols for different tube current modulation techniques (ATCM). We used the 16-slice Toshiba Activion CT scanner with the 'SureExposure3D' ATCM system. Thermoluminescent dosimeters were placed inside the anthropomorphic phantom Alderson-Rando for dosimetric assessments. An analytical phantom was used for the objective evaluation of image quality. It is observed that the higher standard deviation technique (SD) has the lowest value of effective dose. The use of different tube current modulation techniques showed significant reduction of radiation doses for the abdomen exams in computed tomography. The ATCM protocols can be an excellent alternative to dose reduction in CT scans, since it does not impair the diagnostic image quality. (author)

  4. Comparative study of dose descriptor in pediatric computed tomography exams; Estudo comparativo de descritor de dose em exames pediatricos de tomografia computadorizada

    Energy Technology Data Exchange (ETDEWEB)

    Finatto, Jerusa Dalbosco; Silva, Ana Maria Marques da, E-mail: jerusa.finatto@acad.pucrs.br, E-mail: ana.marques@pucrs.br [Pontificia Universidade Catolica do Rio Grande do Sul (PUCRS), Porto Alegre, RS (Brazil); Froner, Ana Paula Pastre; Pimentel, Juliana, E-mail: ana.froner@pucrs.br, E-mail: juliana.pimentel@pucrs.br [Hospital Sao Lucas (HSL/PUCRS), Porto Alegre, RS (Brazil)

    2014-07-01

    This work aims to investigate the dose descriptor, volumetric Computed Tomography Dose Index (CTDI), a pediatric patients sample undergoing to skull CT, comparing the results with the diagnostic reference levels of the literature. Were collected volumetric CTDI values of all skull CT exams performed retrospectively in children of 0-10 years of age in a period of 12 months in a large hospital size. Patients, in a total of 103, were divided into four groups, where the criterion of separation used was age, trying to use the same division used in international references dose descriptors. In all acquisitions we used the pediatric protocol and the Automatic Exposure Control (AEC) available on the equipment. The CDTI values, with and without the use of AEC for pediatric studies, were compared. There was a reduction of approximately 100% in the absorbed dose value due to the use of the AEC. From the data collected and analyzed in this work, it is concluded that the use of dose reduction systems is relevant, such as the Care Dose, to maintain volumetric CTDI values within the reference levels. Also it is important the observation of range of children age to the appropriate choice of parameters used in the test protocol. The values obtained are according to the diagnostic reference levels from the literature.

  5. Computed tomography of the dog's brain: normal aspects and anatomical correlation; Tomografia computadorizada do encefalo do cao: aspectos da normalidade e correlacao anatomica

    Energy Technology Data Exchange (ETDEWEB)

    Lorigados, C.A.B., E-mail: clorigados@usp.br [Faculdades Metropolitanas Unidas (UniFMU), Sao Paulo, SP (Brazil); Pinto, A.C.B.F. [Universidade de Sao Paulo (USP), SP (Brazil). Faculdade de Medicina Veterinaria e Zootecnia

    2013-06-15

    Normal tomographic images of dog's heads were obtained, aimed to familiarize them with the normal aspects of the brain and correlate these findings with the relevant anatomy of the region studied. Several anatomical structures, such as the parenchyma of the frontal, parietal, temporal and occipital lobes, the longitudinal fissure, the ventricular system, the cerebellum, the olfactory bulb, the corpus callosum, diencephalon, the pons, the medulla oblongata and the chiasmatic sulcus were directly identified or were related to neighboring structures which helped in their identification. (author)

  6. Computed tomography of mast cell tumors in dogs: assessment before and after chemotherapy; Tomografia computadorizada de mastocitomas em caes: avaliacao pre e pos-tratamento quimioterapico

    Energy Technology Data Exchange (ETDEWEB)

    Lorigados, Carla A.B.; Matera, Julia Maria; Pinto, Ana Carolina B.C.F.; Macedo, Thais R., E-mail: clorigados@usp.br [Universidade de Sao Paulo (FMVZ/USP), SP (Brazil). Fac. de Medicina Veterinaria e Zootecnia. Dept. de Cirurgia; Coppi, Antonio A.; Ladd, Fernando V.L. [Universidade de Sao Paulo (LSSCA/USP), SP (Brazil). Fac. de Medicina Veterinaria e Zootecnia. Lab. de Estereologia Estocastica e Anatomia Quimica; Souza, Vanessa A.F. de [Faculdades Metropolitanas Unidas (FMU), Sao Paulo, SP (Brazil). Curso de Medicina Veterinaria

    2013-11-15

    Nineteen dogs with mast cell tumors treated with chemotherapy were evaluated by computed tomography (CT). Were evaluated aspects related to contours, attenuation, postcontrast enhancement and presence of cleavage with adjacent structures. The RECIST criteria and volumetric measurement of lesions were performed to assess the response to treatment. The mast cell tumors presented a homogeneous or heterogeneous attenuation, presented more frequently a well delineated and regular contours and moderate enhancement after intravenous administration of the iodinated contrast media. The methods RECIST and volumetric measurements showed an excellent agreement to the classification of therapeutic response, providing a good parameter of the response to treatment. The CT examination proved to be useful in the delimitation of the tumor and an important tool for planning of surgical margins. (author)

  7. Survey of computed tomography doses in head and chest protocols; Levantamento de doses em tomografia computadorizada em protocolos de cranio e torax

    Energy Technology Data Exchange (ETDEWEB)

    Souza, Giordana Salvi de; Silva, Ana Maria Marques da, E-mail: giordana.souza@acad.pucrs.br [Pontificia Universidade Catolica do Rio Grande do Sul (PUC-RS), Porto Alegre, RS (Brazil). Faculdade de Fisica. Nucleo de Pesquisa em Imagens Medicas

    2016-07-01

    Computed tomography is a clinical tool for the diagnosis of patients. However, the patient is subjected to a complex dose distribution. The aim of this study was to survey dose indicators in head and chest protocols CT scans, in terms of Dose-Length Product(DLP) and effective dose for adult and pediatric patients, comparing them with diagnostic reference levels in the literature. Patients were divided into age groups and the following image acquisition parameters were collected: age, kV, mAs, Volumetric Computed Tomography Dose Index (CTDIvol) and DLP. The effective dose was found multiplying DLP by correction factors. The results were obtained from the third quartile and showed the importance of determining kV and mAs values for each patient depending on the studied region, age and thickness. (author)

  8. Pediatric computed tomography dose of head and chest exams: a bibliography revision; Dose em exames de cranio e torax de tomografia computadorizada pediatrica: uma revisao bibliografica

    Energy Technology Data Exchange (ETDEWEB)

    Friedrich, Barbara Q.; Capaverde, Alexandre S.; Vanni, Stefania; Mazzola, Carolina F.S.; Silva, Ana M. Marques da, E-mail: barbara.friedrich@acad.pucrs.br [Pontificia Universidade Catolica do Rio Grande do Sul (PUC-RS), Porto Alegre, RS (Brazil)

    2015-08-15

    The Computed Tomography (CT) imaging diagnosis it is responsible for over 34% of the radiation dose given to society, only in Brazil there is around 3833 CT equipment. There are two dose index in CT, the CTDI{sub vol} and DLP that represents the Computed Tomography dose index and the product of the CTDI{sub vol} by the length of irradiation. This paper has as objective describe the values of CTDI{sub vol} e DLP for pediatric exams of chest and head. This is an exploratory study of bibliography revision on the PubMed data base using the index terms with the following crossing: Computed Tomography AND Reference Levels AND Dose. The search was limited by published studies on the last 5 years with patients among 0 and 15 years, in English or Portuguese. Besides that, were included references guides suggest by scientific and governmental organizations on the last 5 years. The data analysis was made using the four readings of Gil: exploratory, selective, analytic and interpretative. By the Exploratory Reading were located 23 articles. On the Selective Reading were excluded 4 articles and on the Analytic Reading 9 articles. The Interpretative Reading was made using 7 publications. Regarding the references guides were includes 3 guides. The Portaria MS453/98 was included for being the only national publication. All data were characterized between practical levels and reference levels. The conclusion is that there is no consensus between the reference levels for the selected articles, for pediatric exams. Besides that, the national legislation do not have reference levels for pediatric CT. (author)

  9. Determination of the initial energy in computerized tomography with proton beams; Determinacao da energia inicial em tomografia computadorizada com feixe de protons

    Energy Technology Data Exchange (ETDEWEB)

    Rocha, Rodrigo Luis da

    2007-07-01

    In earliest works devoted to proton computed tomography it was shown that the advantage of pCT image reconstruction appears when the energy is close to the Bragg peak region, since the proton passes the object. This effect provided by the Bragg peak makes the computerized tomography with protons possible. However, when decreasing the initial proton energy, with the increase of the irradiation dose, there are two effects that work simultaneously in opposite ways. First, the energy loss of a proton in an object becomes bigger at small initial energy. At the same time decreasing of the proton energy results in the increase of the energy straggling, requiring a larger number of protons. In this work the radiation dose dependence on the proton initial energy was studied using analytical formulas and computer simulations. The investigation determined that the radiation dose practically does not depend on the initial energy, except in the energy region very close to the minimum energy necessary to pass the object. (author)

  10. Method of evaluation of diagnostics reference levels in computerized tomography; Metodo de avaliacao de niveis de referencia de radiodiagnostico em tomografia computadorizada

    Energy Technology Data Exchange (ETDEWEB)

    Vega, Walter Flores

    1999-04-01

    Computerized tomography is a complex technique with several selectable exposition parameters delivering high doses to the patient. In this work it was developed a simple methodology to evaluate diagnostic reference levels in computerized tomography, using the concept of Multiple Scan Average Dose (MSAD), recently adopted by the Health Ministry. For evaluation of the MSAD, a dose distribution was obtained through a measured dose profile on the axial axis of a water phantom with thermoluminescence dosemeters, TLD-100, for different exam technique. The MSAD was evaluated hrough two distinct methods. First, it was evaluated by the integration of the dose profile of a single slice and, second, obtained by the integration on central slice of the profile of several slices. The latter is in of accordance with the ionization chamber method, suggesting to be the most practical method of dose evaluation to be applied in the diagnostic reference level assessment routine for CT, using TLDs. (author)

  11. Multiple calcified large nodules or masses with calcifications: computed tomography findings; Massas e nodulos pulmonares multiplos com calcificacoes: aspectos na tomografia computadorizada

    Energy Technology Data Exchange (ETDEWEB)

    Marchiori, Edson [Universidade Federal Fluminense, RJ (Brazil). Dept. de Radiologia]. E-mail: edmarchiori@bol.com.br; Damato, Simone; Koch, Melissa; Gasparetto, Emerson L. [Universidade Federal do Rio de Janeiro, RJ (Brazil); Souza Junior, Arthur Soares [Faculdade de Medicina de Sao Jose do Rio Preto (Famerp), SP (Brazil). Hospital de Base; Escuissato, Dante L. [Parana Univ., Curitiba, PR (Brazil). Dept. de Radiologia; Nobre, Luiz Felipe [Santa Catarina Univ., Florianopolis, SC (Brazil); Zanetti, Glaucia [Faculdade de Medicina de Petropolis, RJ (Brazil)

    2005-07-15

    Objective: to describe the main tomographic patterns of the diseases that show multiple nodules or masses, with calcification. Material and method: we evaluated 31 patients showing multiple nodules or masses with calcification at computed tomography. Results: the diseases that cause this pattern were calcified metastases, amyloidosis, hyalinising granulomas, epithelioid hemangioendothelioma and the conglomerate masses of silicosis and talcosis. Conclusion: the identification of the pattern of is very important in the differential diagnostic of pulmonary multiple nodules or masses. (author)

  12. Experimental study of mechanisms of sand production using X-ray computerized tomography; Estudo experimental dos mecanismos da producao de areia empregando tomografia computadorizada de raios X

    Energy Technology Data Exchange (ETDEWEB)

    Santos, Janaina B.; Vargas Junior, Euripedes [Pontificia Univ. Catolica do Rio de Janeiro (PUC-Rio), RJ (Brazil). Dept. de Engenharia Civil; Barroso, Emilio V. [Universidade Federal do Rio de Janeiro (UFRJ), RJ (Brazil). Dept. de Geologia; Campos, Elisabete; Goncalves, Clemente; Tavares, Andre [PETROBRAS, Rio de Janeiro, RJ (Brazil). Centro de Pesquisas (CENPES)

    2004-07-01

    During productive phase of the well, many times there is simultaneous production of the solid particles detached from matrix of the reservoir rock. This phenomenon receives the name of the sand production. In this case stress and flow conditions around of the well are fundamental factors for deflagration of the process. Stress concentration in the wall of the well lead to the loss of cohesion between grains arising, consequently, a granular material region susceptible for dragging by seepage forces derived from fluid flow. The objective of this work was to perform sand production tests in Rio Bonito and synthetic sandstone samples using real-time X-Ray Computerized Tomography. The tests investigated the initial and the evolution of failure at the cavity wall of samples. These are initial stages of the sand production process. The analysis of the CT-scans obtained during tests allowed the visualization of breakouts and collapses of the wells. From studies more details were possible estimate the sand production and produce 3-D images of the propagation of the failure. (author)

  13. Interstitial pulmonary alterations in visceral leishmaniasis: evaluation with high-resolution computed tomography; Alteracoes pulmonares intersticiais na leishmaniose visceral: avaliacao pela tomografia computadorizada de alta resolucao

    Energy Technology Data Exchange (ETDEWEB)

    Costa, Norma Selma Santos; Cerri, Giovanni Guido [Sao Paulo Univ., SP (Brazil). Faculdade de Medicina. Dept. de Radiologia

    1999-08-01

    Visceral leishmaniasis, also called kala-azar, is a disease caused by a protozoan, the Leishmania donovani chagasi, that comprises reticuloendothelial system with involvement of the liver, spleen and bone marrow. It is endemic in some areas of northeastern Brazil and other countries of Latin America and Africa. The pathogenesis is related to the immunologic system of patients that present with the inability to activate the phagocytosis of the macrophages. As occurs in the liver and kidneys, the lungs are also involved with interstitial abnormalities caused by Leishmania that are not dependent upon the presence of the parasite. The histopathologic changes described are the involvement of inter alveolar septal in three different phases, irregularly and diffusely throughout the whole pulmonary parenchyma. This work analyzed high-resolution computed tomography (HRCT) of the thorax in 17 patients with visceral leishmaniasis in order to detect and characterize the abnormalities described in the anatomo pathologic findings reported in the literature. The HRCT is being used to evaluate chronic interstitial lung disease in a good correlation with histologic findings. The most common findings detected by HRCT were the reticular opacities that include peribronchovascular interstitial thickening and interlobular septal thickening an ground-glass opacity. The HRCT suggests that similar changes to that found in alveolar structures may occur in the secondary pulmonary lobule and that the involvement in the parenchymal interstitium represents the findings reported by pathological studies in visceral leishmaniasis. (author)

  14. Parosteal lipoma - a case report: conventional radiology, CT and MRI; Lipoma parosteal - relato de um caso: radiologia convencional, tomografia computadorizada e ressonancia magnetica

    Energy Technology Data Exchange (ETDEWEB)

    Albuquerque, Silvio Cavalcanti [Pernambuco Univ., Recife, PE (Brazil). Hospital das Clinicas]|[Instituto Materno Infantil de Pernambuco, Recife, PE (Brazil); Nascimento, Edilene Cristina do; Silva, Ivone Martins da [Pernambuco Univ., Recife PE (Brazil). Hospital das Clinicas. Servico de Radiologia

    1996-03-01

    The authors report a case parosteal lipoma, a rare benign tumor, associated with exostosis, in proximal radius. The diagnosis aspects in conventional radiology, computed tomography and magnetic resonance imaging are presented, as well as a review of the medical literature about the case. (author). 7 refs., 3 figs.

  15. Typical and atypical presentations of paranasal sinus mucocele at computed tomography; Apresentacoes tipicas de mucocele dos seios paranasais na tomografia computadorizada

    Energy Technology Data Exchange (ETDEWEB)

    Carvalho, Bruna Vilaca de; Lopes, Izabella de Campos Carvalho; Correa, James de Brito, E-mail: brunavilaca@gmail.com [Hospital Mater Dei, Belo Horizonte, MG (Brazil). Dept. de Radiologia e Diagnostico por Imagem; Ramos, Laura Filgueiras Mourao; Motta, Emilia Guerra Pinto Coelho; Diniz, Renata Lopes Furletti Caldeira [Hospital Mater Dei, Belo Horizonte, MG (Brazil)

    2013-11-15

    Mucoceles are cystic masses that generally affect the sinuses. It occurs as a result from obstruction of the ostium of a sinus and consequential accumulation of mucus. Frontal and ethmoid sinuses are mostly affected. Usually, the clinical symptoms are insidious, varying with the extent of the affected region. The treatment is surgical and endoscopic surgery is the method of choice in most cases. The present study is aimed at describing the main characteristics of paranasal sinuses mucoceles, demonstrating and illustrating a series of atypical presentations with emphasis on imaging findings. (author)

  16. Preliminary tests in skull pediatric phantom for dosimetry in computerized tomography; Testes preliminares em um simulador pediatrico de cranio para dosimetria em tomografia computadorizada

    Energy Technology Data Exchange (ETDEWEB)

    Martins, Elaine Wirney; Potiens, Maria da Penha de A., E-mail: elainewirney@uso.br, E-mail: mppalbu@ipen.br [Instituto de Pesquisas Energeticas e Nucleares (IPEN/CNEN-SP), Sao Paulo, SP (Brazil)

    2014-07-01

    Computed tomography (CT) is one of the techniques in the field of radiology with striking technological advance in recent years. One reason for this was the increased number of channels associated with the increased power of the X-ray tube. These conditions allowed the equipment high speed in the acquisition of the cuts, reducing the patient exposure time essential characteristic for the increase of its use in pediatric patients. In this context, were developed a new pediatric skull simulator to analyze the results of measurements performed in laboratory and clinic beams with the objective of creation and use of diagnostic reference levels observing risks stochastic effects and assessing the reduction of absorbed doses in patients undergoing growing. Preliminary tests performed in clinical beams showed C{sub w} values: 2.525 ± 0.212 mGy for the developed simulator quoted and 3.362 ± 0.282 mGy for a simulator developed by IPEN called standard, both being between uncertainty values of 8.4% and 14.4% suggested by TRS number 457.

  17. Development and application of a pediatric head phantom for dosimetry in computed tomography; Desenvolvimento e aplicacao de um simulador pediatrico craniano para dosimetria em tomografia computadorizada

    Energy Technology Data Exchange (ETDEWEB)

    Martins, Elaine Wirney

    2016-11-01

    To determine the exposure levels and the absorbed dose in patients undergoing CT scans, is necessary to calculate the CT dose index in measurements with a PMMA or water phantom. The phantom must be enough to simulate the attenuation and scattering characteristics of a human body or parts in a radiation field. The CT specific quantities : CT air kerma index (Ca,100) , weighted CT air kerma index (CW ), a total volume CT air kerma index (Cvol) and the CT air kerma-length product (PKL) must be determined and compared to literature reference levels. In this work a head pediatric phantom was developed, considering that the Brazilian published Diagnostic Reference Levels (DRL) are based on adult phantom measurements. This developed phantom shows a construction innovation using materials to simulate the skullcap, cortical bone (aluminum) and cancellous bone (PVC), and it was filled with distilled water. The phantom dimension follows the recommendations of the World Health Organization and the International Commission on Radiation Units for children from 0 to 5 years old head size: diameter of 160 mm and height of 155 mm. The skullcap has 4 mm of thickness and 111.9 mm of internal diameter. In order to evaluate its behavior, tests were carried out in calibration laboratories and in clinical beams. The results showed attenuation up to 23% when different materials are used as skullcap, demonstrating that the DRLs adopted could be overestimating the dose received by pediatric patients. It is observed that the dose received by CT skull scans presents different distribution, due to the skullcap partially attenuation and/or backscattering which is not considered when the PMMA phantom is used.

  18. Positioning variation analysis using Cone Beam Computed Tomography volumetric images; Analise das variacoes de posicionamento utilizando imagens volumetricas de Tomografia Computadorizada de Feixe Conico

    Energy Technology Data Exchange (ETDEWEB)

    Oliveira, Camila T.; Fontana, Thiago S.; Habitzreuter, Angela B.; Santos, Gabriela R.; Rodrigues, Laura N., E-mail: camila_fmedica@hotmail.com [Instituto do Cancer do Estado de Sao Paulo(ICESP), Sao Paulo, SP (Brazil). Servico de Radioterapia

    2013-12-15

    Radiotherapy is one of the main treatment modalities of malignancies, either associated with other techniques or not. The successful use of radiation depends on several factors, such as the choice of treatment technique, dosimetric accuracy and geometric precision. The movement of internal organs plays a role quite significant in the calculation of setup margins, but during treatment, the most important variation is the patient’s positioning error. This study evaluated the geometric accuracy in positioning patients with anal canal, prostate, and head and neck cancer, who were treated at ICESP. Cone Beam Computed Tomography (CBCT) images of 40 patients were used, totalizing 224 images. For every CBCT image, the displacement was calculated through the fusion between the images acquired before the treatment and CT images obtained in the simulation.The average deviation was 0.24±0.10 cm to the left-right direction, 0.21±0.12 cm in the anterior-posterior and 0.30±0.18 cm in the superior-inferior direction for cases of anal canal; 0.20±0.10 cm in the left-right, 0.20±0.10 cm in the anterior-posterior and 0.23±0.11 cm in superior-inferior direction for prostate treatments; and 0.11±0.07 cm in the left-right, 0.13±0.06 cm in the anterior-posterior and 0.15±0.10 cm in superior-inferior direction for the treatment of head and neck. The results found were within the predicted PTV margins used at the Institution. (author)

  19. Dose optimization in adult patients exams in a computerized tomography service; Otimizacao de dose em exames de pacientes adultos em um servico de tomografia computadorizada

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    Pimentel, Juliana; Finatto, Jerusa D.; Silva, Ana Maria Marques da, E-mail: ana.marques@pucrs.br [Pontificia Universidade Catolica do Rio Grande do Sul (PUCRS), Porto Alegre, RS (Brazil); Froner, Ana Paula P. [CDI Tomografia e Ressonancia Magnetica, Porto Alegre, RS (Brazil)

    2013-08-15

    This paper presents a study of dose optimization in computed tomography X-ray of skull, chest and abdomen of adult patients, performed in a diagnostic imaging service in a large hospital. Images of a simulated dose phantom were acquired and the kVp, mAs, pitch, thickness and CTDI{sub vol} were collected directly from the equipment. Using the PACS system, regions of interest were delineated, where the mean and standard deviation of CT numbers for each protocol were been calculated. The optimization took into account the maintenance of the CT number and noise from images acquired with clinical protocols. It was observed that the protocols used in the service, in general, exhibit a low dose, despite the great variability among the different professional shifts. In examinations of the chest, skull and abdomen, changes in the values of mAs and pitch were suggested, allowing dose reductions (60%, 17% and 19%, respectively), without compromising the image diagnostic quality. (author)

  20. Development and characterization of special ionization chambers for computed tomography beams; Desenvolvimento e caracterizacao de camaras de ionizacao especiais para feixes de tomografia computadorizada

    Energy Technology Data Exchange (ETDEWEB)

    Castro, Maysa Costa de

    2016-10-01

    The use of computed tomography (CT) for imaging procedures is growing due to advances in the CT equipment technology, because they allow the obtention of images with better resolution than through other techniques. Therefore, they are responsible for increasing the dose radiation of patients during the procedure. This fact led to a greater concern about the doses received by patients who undergo this type of examination. To perform the dosimetry in CT beams, the most widely used instrument is the pencil type ionization chamber, because this dosimeter has a uniform response to the incident radiation beam for all angles. The conventional ionization chamber, which is available on the market, has a sensitive volume length of 10 cm; however, some studies have shown that this dosimeter has underestimated the dose values. Therefore, in this study two ionization chambers with sensitive volume lengths of 10 cm and 30 cm, making use of low cost national materials, were developed at the Calibration Laboratory of Instruments (LCI-IPEN/CNEN). The characterization of these chambers was performed, and the results were obtained within the international recommended limits. As an application, the developed ionization chambers and a commercial chamber were tested in a clinical tomograph. The developed ionization chambers were analyzed in a complete way for their possible uses. (author)

  1. Doença cística medular do rim: relato de um caso diagnosticado por ultra-sonografia e tomografia computadorizada

    OpenAIRE

    Carvalho Tarcísio Nunes; Araújo Jr. Cyrillo Rodrigues de; Fraguas Filho Sérgio Roberto; Costa Marlos Augusto Bittencourt; Ribeiro Flávia Aparecida de Souza; Teixeira Kim-Ir-Sen Santos

    2003-01-01

    Doença cística medular, nefronofitíase juvenil familiar ou complexo de doença cística medular referem-se a um grupo de doenças similares cuja lesão básica é uma progressiva atrofia tubular renal com esclerose glomerular e formação cística medular. É importante causa de insuficiência renal em pacientes adolescentes. Estudos de imagem têm papel principal no diagnóstico desta enfermidade, com cistos caracteristicamente individualizados na medula renal e junção córtico-medular e tamanho renal nor...

  2. Computed tomography findings in patients less than 20 years old with lymphoma; Aspectos da tomografia computadorizada no linfoma em pacientes abaixo de 20 anos de idade

    Energy Technology Data Exchange (ETDEWEB)

    Borba, Adriana Moreira Viana [Pontificia Universidade Catolica do Rio de Janeiro (PUC-RJ), Rio de Janeiro, RJ (Brazil). Escola de Medicina; Monteiro, Alexandra Maria Vieira; Lucena, Stella Beatriz Goncalves de [Universidade do Estado do Rio de Janeiro (UERJ), RJ (Brazil). Faculdade de Ciencias Medicas; Lima, Claudio Marcio Amaral de Oliveira; Ribeiro, Erica Barreiros [Hospital Naval Marcilio Dias, Rio de Janeiro, RJ (Brazil)]. E-mail: cmaol@br.inter.net; Skinner, Luis Flavio [Universidade do Estado do Rio de Janeiro (UERJ), RJ (Brazil). Faculdade de Ciencias Medicas. Hospital Universitario Pedro Ernesto (HUPE)

    2007-03-15

    Objective: To describe the general findings of lymphoma and their histological patterns in patients less than 20 years old. Materials And Methods: Twenty-two cases (16 male and 6 female, mean age 11.5 years) from the digital archive of computed tomography at the Cancer Control Center of Hospital Universitario Pedro Ernesto - Universidade do Estado do Rio de Janeiro, Rio de Janeiro, RJ, Brazil, were retrospectively analyzed in the period between March 2003 and July 2005. Of these 22 cases, 12 were Hodgkin's and 10 were non-Hodgkin's. Results: Overall, mediastinal lymphadenomegaly was the most frequent finding (59%), with predominance in the Hodgkin's subgroup (75%), followed by hepatosplenomegaly (50%) and cervical and retroperitoneal lymphadenomegaly (27.3%). The Hodgkin's subgroup presented a prevalence of lymphadenopathy, in many lymph node chains, followed by hepatosplenomegaly (50%). One case was found with unilateral tonsillar mass, pulmonary ground-glass opacities, and renal nodules. In the non-Hodgkin's subgroup, the disease was predominantly extranodal, characterized by hepatosplenomegaly (50%), thickening of the intestinal wall (40%), pleural effusion (30%), pulmonary nodule (20%), ascites (10%), pericardial effusion (10%) and mixed bone lesions (10%). Conclusion: Computed tomography is an extremely useful method for detection, staging and follow-up of lymphomas, with alert findings like mediastinal lymphadenopathy, hepatosplenomegaly, unilateral tonsillar mass and thickening of intestinal wall. (author)

  3. Density evaluation by computerized tomography in plain soils over different manipulation systems; Avaliacao da densidade pelo metodo da tomografia computadorizada de um planossolo sob diferentes sistemas de manejo

    Energy Technology Data Exchange (ETDEWEB)

    Pedrotti, Alceu [Lavras Univ., MG (Brazil). Dept. de Ciencia do Solo; Pauletto, Eloy Antonio [Pelotas Univ., RS (Brazil). Dept. de Solos; Crestana, Silvio [Empresa Brasileira de Pesquisa Agropecuaria (EMBRAPA), Sao Carlos, SP (Brazil). Centro Nacional de Pesquisa e Desenvolvimento de Instrumentacao Agropecuaria (CNPDIA)

    1996-08-01

    The objective of this paper is the evaluation of a plain soil density in different culture systems determined by X ray computerized tomography.It was observed a larger variation in densities in soils profiles analysed. The identification of layers is better utilising computerized tomography than others technic 1 fig.

  4. Helical computed tomography of the paranasal sinuses in children: evaluation of sinus inflammatory diseases; Tomografia computadorizada helicoidal dos seios paranasais na crianca: avaliacao das sinusopatias inflamatorias

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    Dutra, Luiz Dias [Universidade Federal, Rio de Janeiro, RJ (Brazil). Faculdade de Medicina. Dept. de Radiologia; Marchiori, Edson [Universidade Federal Fluminense, Niteroi, RJ (Brazil). Dept. de Radiologia]. E-mail: edmarchiori@zipmail.com.br

    2002-06-01

    We conducted a retrospective analysis of 71 selected pediatric patients, aged 1 to 7 years, which were submitted to helical computed tomography examination of the paranasal sinuses in the period between March, 1997 and April, 1998 due to recurrent acute sinusitis and chronic sinusitis. Clinical and helical computed tomography findings were compared by evaluating the pneumatization of the paranasal sinuses, ostiomeatal complexes, anatomic variants, the status of mucosal surface and lesion extension. The most common CT findings were total or partial opacification of one or more paranasal cavities (92.9%), followed by mucosal thickening (67.6%). In the majority of cases there was association between sinusitis and ostiomeatal obstruction. Anatomic variants were identified from the age of one year. The most common anatomic variant was septonasal deviation (14.1%) that was associated to sinusitis in about 71% of the patients. (author)

  5. Computed tomography of the adrenals in patients with tuberculosis; Emprego da tomografia computadorizada na deteccao de alteracoes das adrenais em doentes com tuberculose

    Energy Technology Data Exchange (ETDEWEB)

    Yamashita, Seizo; Machado, Jussara Marcondes; Morceli, Jose [UNESP, Botucatu, SP (Brazil). Faculdade de Medicina. Dept. de Doencas Tropicais e Diagnostico por Imagem]. E-mail: seizo_eid@uol.com.br

    2004-06-01

    We evaluated the adrenals of individuals without tuberculosis (group 1 - G1) and with tuberculosis (group 2 - G2) using computed tomography. The antero-posterior length, the thickness, and the longitudinal length of the adrenals were compared in G1 and G2. The duration of the disease, the occurrence of morphologic abnormalities in G2, the distribution according to sex, age and skin color were also studied. There was difference in the antero-posterior length and thickness of right adrenal between G1 and G2. A higher prevalence of white skin male individuals was observed in G2. There was no association between duration of the disease and the occurrence of morphologic abnormalities in G2. A higher occurrence of adrenal enlargement was observed in G2. The main computed tomography findings in patients with tuberculosis were enlargement of the adrenal without calcification, enlargement of the adrenal with punctiform calcifications, and residual calcification of the adrenal. (author)

  6. Percutaneous computed tomography-guided biopsy of the lung: data from a hospital; Biopsia pulmonar percutanea guiada por tomografia computadorizada: dados de um hospital

    Energy Technology Data Exchange (ETDEWEB)

    Carazzai, Emilio Humberto; Rossi, Marcelo D' Andrea [Maximagem Diagnosticos por Imagem, Sao Paulo, SP (Brazil); Andreosi, Maristela [Hospital Beneficencia Portuguesa, Sao Paulo, SP (Brazil); Gonzalez, Fabio Mota; Tornin, Olger de Souza [Hospital Heliopolis, Sao Paulo, SP (Brazil)]. E-mail: olger1@uol.com.br; Gonzalez, Sandra de Quadros Uzeda [Universidade Federal de Sao Paulo (UNIFESP/EPM), SP (Brazil)

    2006-07-15

    Objective: to present the experience of Santa Cecilia Hospital (Sao Paulo, SP, Brazil) radiology service in the handling of computed tomography-guided fine-needle aspiration biopsy and percutaneous core biopsy of pulmonary lesions, analyzing their importance and associated complications. Materials and methods: one hundred and sixty-eight computed tomography-guided biopsies were performed in 84 men and 84 women. Sixty-four patients underwent fine-needle aspiration biopsy, 68 underwent percutaneous core biopsy and 36 patients underwent both techniques. Results: pneumothorax occurred in 38 patients, and pulmonary hemorrhage in then cases. The biopsied lesions ranged in size from 0.5 to 15 cm. The diagnosis was achieved at the first attempt in 132 cases and at the second attempt, in ten cases. Conclusion: the accuracy of fine-needle aspiration and percutaneous core biopsies depends both on the size of the lesion and the patient's cooperation. These techniques are relatively safe and present a high diagnostic accuracy when performed by an experienced professional. (author)

  7. Computed tomography of an Egyptian mummy from the 22nd dynasty period; Tomografia computadorizada de uma mumia egipcia da 22a. dinastia

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    Minguetti, Guilberto [Parana Univ., Curitiba, PR (Brazil). Dept. de Clinica Medica; Parolin, Benito Groszewicz [Centro de Tomografia Computadorizada S.C., Ltda., Curitiba, PR (Brazil)

    1998-08-01

    The authors present a CT study of a mummy from the 22nd dynasty period which showed a well preserved skeleton with almost normal bones and joint structures. No funerary jewelry and amulets commonly found in the royal mummies were identified. They also present an historical revision about the use of conventional X-ray and latter of CT scanning by the biggest museums of the world as an special tool for the development of egyptology around many European and American countries. (author)

  8. Computed tomographic study of 50 patients with hypodense hepatic injuries in childhood; Estudo de 50 casos por tomografia computadorizada de lesoes hipodensas hepaticas fundamentais na infancia

    Energy Technology Data Exchange (ETDEWEB)

    Pereira, Ines Minniti Rodrigues; Alvares, Beatriz Regina; Baracat, Jamal; Martins, Daniel Lahan [Universidade Estadual de Campinas, SP (Brazil). Faculdade de Ciencias Medicas. Dept. de Radiologia]. E-mail: iminniti@fcm.unicamp.br; Pereira, Ricardo Minniti Rodrigues [Universidade Estadual de Campinas, SP (Brazil). Faculdade de Ciencias Medicas

    2006-03-15

    Objective: To describe the different tomographic findings in hypodense hepatic lesions in children and its differential diagnosis. Materials and methods: computed tomographic studies were obtained from 50 patients (age range: 0-16 years) with low-density liver lesions previously diagnosed by ultrasound. Images were made before and after administration of intravenous contrast medium. Image findings were analyzed and afterwards correlated with anatomopathological diagnosis. Results: forty-seven of 50 cases were confirmed, 30 by anatomopathological diagnosis. Most of then were benign lesions, hemangioma in 20%. Such lesions presented a homogeneous contrast absorption, mainly at the delayed phase, differing from malignant lesions. Metastasis was the most frequently found malignant lesion (18%). Conclusion: computed tomographic study is of great value in complementing the diagnosis of hypodense hepatic lesions in children, and must follow ultrasound diagnosis as a routine procedure. (author)

  9. Study of radiation conditions for obtaining standard beam computed tomography; Estudo das condicoes de radiacao para obtencao do feixe padrao em tomografia computadorizada

    Energy Technology Data Exchange (ETDEWEB)

    Andrade, Lucio das Chagas de; Peixoto, Jose Guilherme Pereira, E-mail: lucio-andrade@hotmail.com [Instituto de Radioprotecao e Dosimetria (IRD/CNEN-RJ), Rio de Janeiro, RJ (Brazil)

    2015-07-01

    In Brazil there is a need to expand the traceability for the calibration of cameras used in dosimetry in CT. Thus, in order to promote the expansion of the radiation conditions RQT, LNMRI disseminate this greatness. These radiation conditions may be characterized in terms of tension in the X-ray tube (PPV), the first half-value layer (1{sup st} HVL) and homogeneity coefficient (CH). The LNMRI achieved satisfactory results within the international specifications suggested by IEC 61267 and TRS 457. (author)

  10. Diagnosis of hepatic steatosis by contrast-enhanced abdominal computed tomography; Diagnostico da esteatose hepatica pela tomografia computadorizada de abdome com meio de contraste intravenoso

    Energy Technology Data Exchange (ETDEWEB)

    Monjardim, Rodrigo da Fonseca; Costa, Danilo Manuel Cerqueira; Romano, Ricardo Francisco Tavares; Salvadori, Priscila Silveira; Santos, Jaime de Vargas Conde dos; Atzingen, Augusto Castelli Von; Shigueoka, David Carlos; D' Ippolito, Giuseppe, E-mail: giuseppe_dr@uol.com.br [Universidade Federal de Sao Paulo (EPM/UNIFESP), SP (Brazil). Escola Paulista de Medicina. Dept. de Diagnostico por Imagem

    2013-05-15

    Objective: to evaluate the diagnostic capacity of abdominal computed tomography in the assessment of hepatic steatosis using the portal phase with a simplified calculation method as compared with the non-contrast-enhanced phase. Materials and methods: in the present study, 150 patients were retrospectively evaluated by means of non-contrast-enhanced and contrast-enhanced computed tomography. One hundred patients had hepatic steatosis and 50 were control subjects. For the diagnosis of hepatic steatosis in the portal phase, the authors considered a result of < 104 HU calculated by the formula [L - 0.3 Multiplication-Sign (0.75 Multiplication-Sign P + 0.25 Multiplication-Sign A)] / 0.7, where L, P and A represent the attenuation of the liver, of the main portal vein and abdominal aorta, respectively. Sensitivity, specificity, positive and negative predictive values were calculated, using non-contrast-enhanced computed tomography as the reference standard. Results: the simplified calculation method with portal phase for the diagnosis of hepatic steatosis showed 100% sensitivity, 36% specificity, negative predictive value of 100% and positive predictive value of 75.8%. The rate of false positive results was 64%. False negative results were not observed. Conclusion: The portal phase presents an excellent sensitivity in the diagnosis of hepatic steatosis, as compared with the non-contrast-enhanced phase of abdominal computed tomography. However, the method has low specificity. (author)

  11. Evaluation of the normal thoracic and abdominal aorta diameters by computerized tomography; Avaliacao dos diametros normais da aorta toracica e abdominal pela tomografia computadorizada

    Energy Technology Data Exchange (ETDEWEB)

    Lucarelli, Claudio Luiz

    1995-07-01

    The study was undertaken to evaluate, through computerized tomography, the diameters of the normal thoracic and abdominal aorta, as well as they are connected to gender, age and body surface area; and the ratio between measurements obtained at the ascending and descending limbs of the thoracic aorta, and between the abdominal aortic diameters. For that reason, we measured the widest anteroposterior diameters of the thoracic aortas at the levels of the arch, the root, the pulmonary artery, and the thoracic-abdominal transition, as well as the level of the emergence of the superior mesenteric artery, of the renal hila and just cephalad to the bifurcation of the abdominal aortas of 350 patients without cardiovascular diseases who had undergone computerized tomography of the thorax and/or abdomen for any other reasons. Observation and statistic analyses led us to conclude that: 1) both the thoracic and abdominal aortic diameters are reduced from their proximal to their distal portions; 2) the body surface influences the size of the aorta, although only extreme variations alter the vessel's caliber; 3) vessel diameter was observed to gradually increase with age; 4) men were found to have larger diameters than age matched women; 5) the ratio between the ascending and descending aortic diameters varies according to gender and age; 6) the relations between abdominal aortic diameters measured at the level of renal hila and cephalad to the bifurcation are independent from gender and age. But the relation between those measured at the level of the superior mesenteric artery and cephalad to the bifurcation are linked to gender, but not to age. (author)

  12. Paracoccidioidomycosis: high-resolution computed tomography - anatomo-pathological correlation; Paracoccidioidomicose: correlacao da tomografia computadorizada de alta resolucao com a anatomopatologia

    Energy Technology Data Exchange (ETDEWEB)

    Marchiori, Edson; Muniz, Maria Angelica Soares; Santos, Maria Lucia de Oliveira [Universidade Federal Fluminense, Niteroi, RJ (Brazil). Inst. de Radiologia; Moraes, Heleno Pinto de [Universidade Federal Fluminense, Niteroi, RJ (Brazil). Inst. de Patologia; Capone, Domenico [Universidade do Estado, Rio de Janeiro, RJ (Brazil). Inst. de Pneumologia

    2000-12-01

    We reviewed the high-resolution computed tomography scans of 13 patients with paracoccidioidomycosis and correlated the findings with the anatomo-pathological findings of 5 patients. The most frequent findings observed were thickening of the interlobular septa, emphysema, ground glass areas, thickening of bronchial walls, tracheal dilatation, nodules, cavities and evidence of fibrosing disease such as architectural distortion, parenchymatous bands, spicular pleural thickening, intralobular reticulate and thickening with distortion off the axial interstitium. (author)

  13. Quantitative computed tomography as a test of endurance for evaluation of bony plates; Utilizacao da tomografia computadorizada quantitativa como teste de resistencia para avaliacao de placas osseas

    Energy Technology Data Exchange (ETDEWEB)

    Melo Filho, E.V.; Costa, L.A.V.S.; Oliveira, D.C. [Universidade Federal do Parana (UFPR), Curitiba, PR (Brazil); Freitas, P.M.C. [Escola de Veterinaria - Universidade Federal de Minas Gerais - Belo Horizonte, MG (Brazil); Teixeira, M.W.; Costa, F.S. [Universidade Federal Rural de Pernambuco - Recife, PE (Brazil)

    2012-06-15

    Quantitative computed tomography was used to determine the radiodensity of bony plates. The CT scans provided information regarding radiodensity of bony plates and allowed to verify the uniformity of bone mineral density in their scope. The proposed methodology should be considered as another tool for determining the resistance of these biomaterials. (author)

  14. CT imaging in the surgical treatment of one-sided extraarticular temporomandibular joint ankylosis; Uso da tomografia computadorizada no planejamento cirurgico da anquilose temporomandibular extra-articular unilateral

    Energy Technology Data Exchange (ETDEWEB)

    Villamizar, Lenin A.; Ghirelli, Carolina de Oliveira; Baroni, Carina Outi; Ferro, Daniel; Pinto, Ana Carolina Brandao de Campos Fonseca, E-mail: carinaouti@yahoo.com.br [Universidade de Sao Paulo (USP), SP (Brazil). Faculdade de Medicina Veterinaria e Zootecnia. Dept. de Cirurgia

    2012-07-01

    Temporomandibular joint (TMJ) ankylosis is characterized by difficulty to open the mouth. The ankylosis may be articular when TJM is involved and extra-articular when other factors lead to a restriction of chewing movements without TJM involvement. Case report of one patient with unilateral ankylosis and his surgical planning through the tomography imaging. CT imaging helps preoperative planning because it can locate the exact point of injury and can make the difference between the true and false ankylosis of the TJM. (author)

  15. Computed tomography-guided percutaneous biopsy of pancreatic masses using pneumodissection; Biopsia percutanea de massas pancreaticas guiada por tomografia computadorizada com pneumodisseccao

    Energy Technology Data Exchange (ETDEWEB)

    Tyng, Chiang Jeng; Bitencourt, Almir Galvao Vieira; Almeida, Maria Fernanda Arruda; Barbosa, Paula Nicole Vieira; Martins, Eduardo Bruno Lobato; Junior, Joao Paulo Kawaoka Matushita; Chojniak, Rubens, E-mail: chiangjengtyng@gmail.com [Hospital A.C. Camargo, Sao Paulo, SP (Brazil). Dept. de Imagem; Coimbra, Felipe Jose Fernandez [Hospital A.C. Camargo, Sao Paulo, SP (Brazil). Dept. de Cirurgia Abdominal

    2013-05-15

    Objective: to describe the technique of computed tomography-guided percutaneous biopsy of pancreatic tumors with pneumodissection. Materials and methods: in the period from June 2011 to May 2012, seven computed tomography guided percutaneous biopsies of pancreatic tumors utilizing pneumodissection were performed in the authors' institution. All the procedures were performed with an automatic biopsy gun and coaxial system with Tru-core needles. The biopsy specimens were histologically assessed. Results: in all the cases the pancreatic mass could not be directly approached by computed tomography without passing through major organs and structures. The injection of air allowed the displacement of adjacent structures and creation of a safe coaxial needle pathway toward the lesion. Biopsy was successfully performed in all the cases, yielding appropriate specimens for pathological analysis. Conclusion: Pneumodissection is a safe, inexpensive and technically easy approach to perform percutaneous biopsy in selected cases where direct access to the pancreatic tumor is not feasible. (author)

  16. A proposal for standardizing computed tomography reports on abdominal aortic aneurysms; Proposta para padronizacao do relatorio de tomografia computadorizada nos aneurismas da aorta abdominal

    Energy Technology Data Exchange (ETDEWEB)

    Torlai, Fabiola Goda; Meirelles, Gustavo S. Portes [Universidade Federal de Sao Paulo (UNIFESP/EPM), SP (Brazil); Miranda Junior, Fausto; Fonseca, Jose Honorio A.P. da [Universidade Federal de Sao Paulo (UNIFESP/EPM), SP (Brazil). Dept. de Cirurgia; Ajzen, Sergio; D' Ippolito, Giuseppe [Universidade Federal de Sao Paulo (UNIFESP/EPM), SP (Brazil). Dept. de Diagnostico por Imagem]. E-mail: giuseppe_dr@uol.com.br

    2006-07-15

    Objective: to propose a model to standardize computed tomography reports on abdominal aortic aneurysms. Materials and methods: interviews were carried out with members of the Vascular Surgery Division of our institution, in the period between April and October 2004, aiming at developing a standardized model of computed tomography reports on abdominal aortic aneurysms. Based on this model, a questionnaire was elaborated and sent to other nine surgeons, all of them experienced in the field of abdominal aortic surgery. The questionnaires response rate was 55.5% (5/9). Results: the most frequently mentioned parameters of interest for evaluation of abdominal aortic aneurysms were: maximum diameter of proximal aortic neck, proximal aortic neck length to lower renal arteries, shape of proximal aortic neck, maximum diameter of the aneurysm and diameter of the common iliac arteries. These data allowed the development of a proposal for a model to standardize computed tomography reports. Conclusion: a model for standardized tomographic analysis of abdominal aortic aneurysms has met vascular surgeons' needs for following-up patients and planning their treatment. (author)

  17. Volumetria hepática computadorizada como método de avaliação e acompanhamento da regeneração hepática após hepatectomia parcial em suínos

    Directory of Open Access Journals (Sweden)

    Fábio Augusto de Carvalho

    Full Text Available OBJETIVO: O estudo analisou a volumetria hepática por tomografia axial computadorizada, através de um programa informatizado semi-automático de aquisição e processamento de imagens digitalizadas, como parâmetro de acompanhamento da regeneração hepática em suínos, após hepatectomia parcial. MÉTODO: Doze suínos fêmeas, da raça Landrace, jovens, foram distribuídos em 3 grupos, conforme tempo de observação após o procedimento cirúrgico: 5(G5, 10(10 ou 15(G15 dias. Todos foram submetidos à hepatectomia parcial e, posteriormente, após acompanhamento, sacrificados, procedendo-se a retirada do fígado regenerado. A peça da hepatectomia e o fígado regenerado foram pesados e submetidos à realização da tomografia e aferição do volume através do software HEPATO®. Para análise estatística foram utilizados os testes não-paramétricos de Kruskal-Wallis e Wilcoxon. Valores de p<0,05 indicaram significância estatística. RESULTADOS: O peso do fígado regenerado foi de: G5=434,5g, G10=449,25g e G15=486,5 g, p=0,592. A regeneração hepática a partir do peso do fígado foi de 83,58% (G5, 94,95% (G10 e 101,63% (G15, p=0,197. O volume do fígado regenerado foi de 403,58 cm² (G5, 450,88 cm² (G10 e 458,93 cm² (G15, p=0,941. A regeneração hepática a partir do volume do fígado foi de 74,25% (G5, 88% (G10 e 100% (G15, p=0,326. Não houve diferença estatística significativa entre os parâmetros. CONCLUSÃO: A avaliação volumétrica por tomografia computadorizada, utilizando um programa informatizado semi-automático de aquisição e processamento de imagens digitalizadas, é método fidedigno para avaliação e acompanhamento da regeneração hepática em suínos, após hepatectomia parcial.

  18. Análise de dentição mista: tomografia versus predição e medida radiográfica Mixed-dentition analysis: tomography versus radiographic prediction and measurement

    Directory of Open Access Journals (Sweden)

    Letícia Guilherme Felício

    2010-10-01

    Full Text Available OBJETIVO: o objetivo dos autores desse estudo foi comparar o método de análise de dentição mista que utiliza tomografia computadorizada de feixe cônico para avaliar os diâmetros dos dentes intraósseos com os métodos de Moyers, Tanaka-Johnston e radiografias oblíquas em 45º. MÉTODOS: foram realizadas medidas, na arcada inferior, dos diâmetros mesiodistais dos incisivos permanentes irrompidos, nos modelos de gesso com auxílio de paquímetro digital e estimativa do tamanho de pré-molares e caninos permanentes ainda não irrompidos utilizando-se a tabela de Moyers e a fórmula de predição de Tanaka-Johnston. Nas radiografias oblíquas em 45º, caninos e pré-molares foram medidos utilizando-se o mesmo instrumento. Nas tomografias, as mesmas unidades dentárias foram aferidas por meio de ferramentas do programa Dolphin. RESULTADOS: a análise estatística revelou elevada concordância entre o método tomográfico e o radiográfico, e baixa concordância entre o tomográfico e os demais avaliados. CONCLUSÃO: a tomografia computadorizada de feixe cônico mostrou-se confiável para análise da dentição mista e apresenta algumas vantagens em relação aos métodos comparados: a observação e mensuração dos dentes intraósseos individualmente, com a possibilidade, contudo, de visualizá-los sob diferentes perspectivas e sem superposição de estruturas anatômicas.OBJECTIVE: The aim of this study was to evaluate the method for mixed-dentition analysis using Cone-Beam Computed Tomography for assessing the diameter of intra-osseous teeth and compare the results with those obtained by Moyers, Tanaka-Johnston, and 45-degree oblique radiographs. METHODS: Measurements of mesial-distal diameters of erupted lower permanent incisors were made on plaster cast models by using a digital calliper, whereas assessment of the size of non-erupted permanent pre-molars and canines was performed by using Moyer's table and Tanaka-Johnston's prediction

  19. Nasal dermoid sinus cyst.

    Science.gov (United States)

    Cauchois, R; Laccourreye, O; Bremond, D; Testud, R; Küffer, R; Monteil, J P

    1994-08-01

    Nasal dermoid sinus cyst is one of the diagnoses of midline nasal masses in children. This retrospective study analyzes the various theories regarding the origin of this congenital abnormality, the differential diagnosis, and the value of magnetic resonance imaging, as well as the various surgical options available.

  20. A Rare Nasal Bone Fracture: Anterior Nasal Spine Fracture

    Directory of Open Access Journals (Sweden)

    Egemen Kucuk

    2014-04-01

    Full Text Available Anterior nasal spine fractures are a quite rare type of nasal bone fractures. Associated cervical spine injuries are more dangerous than the nasal bone fracture. A case of the anterior nasal spine fracture, in a 18-year-old male was presented. Fracture of the anterior nasal spine, should be considered in the differential diagnosis of the midface injuries and also accompanying cervical spine injury should not be ignored.

  1. Eletrocardiografia computadorizada em cães: estudo comparativo

    Directory of Open Access Journals (Sweden)

    Lídia S. Oliveira

    2013-07-01

    Full Text Available O método de eletrocardiografia computadorizada (ECG-C vem sendo crescentemente difundido na medicina veterinária, havendo atualmente diversas marcas e modelos de eletrocardiógrafos disponíveis no mercado. Diante da possibilidade de diferenças na sensibilidade e na reprodutibilidade das medidas obtidas nos traçados, o presente estudo teve como objetivo comparar os parâmetros eletrocardiográficos de cães, obtidos por dois sistemas. Foram avaliados dois diferentes softwares computadorizados, o Wincardio Micromed® (WIN e o modelo TEB ECGPC® (TEB. Quarenta e dois cães hígidos, de diferentes raças (Cocker Spaniel, Daschund, Labrador, Pinscher, Pit Bull Terrier Poodle, Schnauzer, Shit Tzu, Yorkshire e sem raça definida, machos e fêmeas e com idade entre 4 meses e 16 anos foram agrupados segundo o peso e examinados pelos dois sistemas. As medidas eletrocardiográficas dos diferentes traçados foram analisadas na derivação DII. Os resultados indicaram que o sistema TEB apresentou maior sensibilidade na obtenção das medidas de duração da onda P e do complexo QRS, enquanto o sistema WIN foi mais sensível para determinar as medidas de amplitude dos mesmos parâmetros. Os animais de maior porte (26-37kg apresentaram maior variância nas medidas de duração e amplitude de onda P e duração do complexo QRS em comparação aos cães de médio (14-25kg e pequeno (1-13kg porte. O achado de diferenças entre os sistemas testados deve ser levado em consideração ao se empregar os diversos equipamentos para diagnóstico por meio de ECG-C na rotina clínica, de modo a evitarem-se divergências na interpretação dos exames entre diferentes prestadores de serviços veterinários.

  2. Bacterial Nasal Infections

    Science.gov (United States)

    ... vestibule. Nasal furuncles may develop into a spreading infection under the skin (cellulitis) at the tip of the nose. A doctor becomes concerned about infections in this part of the face because veins ...

  3. Zolmitriptan Nasal Spray

    Science.gov (United States)

    ... a copy of the manufacturer's information for the patient.To use the nasal spray, follow these steps: ... used to treat certain types of migraine headaches (hemiplegic or basilar) or other types of headaches (such ...

  4. Nasal packing and stenting

    Directory of Open Access Journals (Sweden)

    Weber, Rainer K.

    2009-01-01

    Full Text Available Nasal packs are indispensable in ENT practice. This study reviews current indications, effectiveness and risks of nasal packs and stents. In endoscopic surgery, nasal packs should always have smooth surfaces to minimize mucosal damage, improve wound healing and increase patient comfort. Functional endoscopic endonasal sinus surgery allows the use of modern nasal packs, since pressure is no longer required. So called hemostatic/resorbable materials are a first step in this direction. However, they may lead to adhesions and foreign body reactions in mucosal membranes. Simple occlusion is an effective method for creating a moist milieu for improved wound healing and avoiding dryness. Stenting of the frontal sinus is recommended if surgery fails to produce a wide, physiologically shaped drainage path that is sufficiently covered by intact tissue.

  5. Budesonide Nasal Spray

    Science.gov (United States)

    ... ingredients in budesonide nasal spray. Check the package label for a list of the ingredients.tell your doctor and pharmacist what prescription and nonprescription medications, vitamins, nutritional supplements, and herbal products you are taking or ...

  6. Fluticasone Nasal Spray

    Science.gov (United States)

    ... ingredients in fluticasone nasal spray. Check the package label for a list of the ingredients.tell your doctor and pharmacist what prescription and nonprescription medications, vitamins, nutritional supplements, and herbal products you are taking, or ...

  7. Nasal gouty tophus: Report a rare case presenting as a nasal hump with nasal obstruction

    Directory of Open Access Journals (Sweden)

    John Chung-Han Wu

    2016-08-01

    Full Text Available Dorsal nasal gouty tophus are rare occurrences with limited documentation. Here we report a male patient who has a history of poorly controlled gouty arthritis. He had nasal obstruction with an enlarging mass over his left nasal ridge for the past three years. Image studies revealed a nasal bone defect underneath the nasal lesion. The firm mass was excised and confirmed to be of gouty origin. The nasal bone defect was repaired with a titanium mesh plate to prevent nasal depression. He has fully recovered with no more nasal obstruction or recurrence of nasal tophus. The case report illustrates a common illness, gout, with a rare clinical manifestation leading to a common symptom, nasal obstruction. It demonstrates the importance of a detailed history, a thorough physical examination and most important of all, an extensive differential diagnosis in our clinical practice.

  8. Pathophysiology of nasal congestion

    Directory of Open Access Journals (Sweden)

    Robert M Naclerio

    2010-02-01

    Full Text Available Robert M Naclerio1, Claus Bachert2, James N Baraniuk31University of Chicago, Department of Surgery, Section of Otolaryngology – Head and Neck Surgery, Chicago, Illinois, USA; 2University of Ghent, Ghent, Belgium; 3Georgetown University, Washington, DC, USAAbstract: Nasal congestion is a common symptom in rhinitis (both allergic and nonallergic, rhinosinusitis and nasal polyposis. Congestion can also be caused by physical obstruction of nasal passages and/or modulation of sensory perception. Mucosal inflammation underlies many of the specific and interrelated factors that contribute to nasal congestion, as well as other symptoms of both allergic rhinitis and rhinosinusitis. A wide range of biologically active agents (eg, histamine, tumor necrosis factor-α, interleukins, cell adhesion molecules and cell types contribute to inflammation, which can manifest as venous engorgement, increased nasal secretions and tissue swelling/edema, ultimately leading to impaired airflow and the sensation of nasal congestion. Inflammation-induced changes in the properties of sensory afferents (eg, expression of peptides and receptors that innervate the nose can also contribute to altered sensory perception, which may result in a subjective feeling of congestion. Increased understanding of the mechanisms underlying inflammation can facilitate improved treatment selection and the development of new therapies for congestion.Keywords: allergic rhinitis, congestion, obstruction, pathophysiology, rhinosinusitis

  9. Nasal septum extramedullary plasmacytoma

    Directory of Open Access Journals (Sweden)

    Belić Branislav

    2013-01-01

    Full Text Available Introduction. Plasmacytomas are malignant tumors characterized by abnormal monoclonal proliferation of plasma cells. They originate in either bone - solitary osseous plasmacytoma, or in soft tissue - extramedullary plasmacytoma (EMP. EMP represents less than 1% of all head and neck malignancies. Case report. We presented a case of EMP of the nasal septum in a 44-year-old male who had progressive difficulty in breathing through the nose and frequent heavy epistaxis on the right side. Nasal endoscopy showed dark red, soft, polypoid tumor in the last third of the right nasal cavity arising from the nasal septum. The biopsy showed that it was plasmacytoma. Bence Jones protein in the urine, serum electrophoresis, bone marrow biopsy, skeletal survey and other screening tests failed to detect multiple myeloma. This confirmed the diagnosis of EMP. The mass was completely removed via an endoscopic approach, and then, 4 week later, radiotherapy was conducted with a radiation dose of 50 Gray. No recurrence was noted in a 3-year follow- up period. Conclusion. EMP of the nasal cavity, being rare and having long natural history, represents a diagnostic and therapeutic challenge for any ear, nose and throat surgeon. Depending on the resectability of the lesion, a combined therapy is the accepted treatment.

  10. É hora de investirmos em intervenções comportamentais computadorizadas no Brasil?

    Directory of Open Access Journals (Sweden)

    Henrique Pinto Gomide

    2013-06-01

    Full Text Available Intervenções comportamentais computadorizadas apresentam evidências de eficácia para diversas condições de saúde, como transtornos de ansiedade ou de humor e abuso do uso de álcool e tabagismo. Embora apresentem efeitos relativamente pequenos, elas podem atingir um grande número de usuários simultaneamente e funcionar de forma ininterrupta. Os objetivos do presente estudo foram: 1 analisar criticamente as evidências de eficácia presentes na literatura sobre intervenções comportamentais computadorizadas; 2 avaliar o potencial de utilização no país; 3 descrever a regulamentação existente; e 4 apresentar ferramentas para desenvolvimento destas intervenções através de uma revisão narrativa da literatura. As intervenções comportamentais computadorizadas se configuram como uma potencial ferramenta para a saúde pública, devido ao crescimento do uso de computadores e internet no Brasil e ao baixo custo de seu desenvolvimento.

  11. Nasal valve surgery.

    Science.gov (United States)

    Apaydin, Fazil

    2011-04-01

    Nasal obstruction can be due to internal and external valve problems that can be seen before and after rhinoplasty. The main scope of this article is to concentrate on surgical solutions to these problems. To overcome nasal obstruction at the internal valve, spreader grafts, spreader flaps, upper lateral splay graft, butterfly graft, flaring suture, M-plasty, Z-plasty, and suspension sutures have been described. The management of the external valve problems is possible by using lateral crural dissection and repositioning, lateral crural strut grafts, alar battens, lateral crural turn-in flap, alar rim grafts, and various other methods. It is not easy to decide which techniques would work best in every case. After a thorough examination and analysis, the underlying cause of the nasal obstruction can be understood, and one or multiple procedures can be chosen according to each individual problem.

  12. Performance of computed tomographic colonography for the screening of colorectal polyp in acromegalic patients: a prospective study Desempenho da colonografia tomográfica computadorizada para o rastreamento de pólipo colorretal em pacientes acromegálicos: um estudo prospectivo

    Directory of Open Access Journals (Sweden)

    Odery Ramos Jr.

    2009-06-01

    áfica computadorizada foi realizada com aparelho de tomografia computadorizada helicoidal multislice da marca GE. A colonoscopia convencional foi realizada, no mesmo dia, sem prévio conhecimento do diagnóstico da colonografia tomográfica computadorizada. O estudo avaliou a capacidade da colonografia tomográfica computadorizada para detectar pacientes acromegálicos com pólipos colorretais e a identificação de cada lesão colorretal descrita pela colonoscopia. RESULTADOS: Em dois pacientes (2/21 a colonoscopia convencional foi incompleta. Entretanto, em todos os pacientes a colonografia tomográfica computadorizada foi completa na avaliação colorretal. Na primeira fase ("por paciente", a colonografia tomográfica computadorizada diagnosticou oito de nove pacientes com pólipos colorretais e mostrou 88% de sensibilidade, 75% de especificidade e 81% de precisão. Na segunda fase ("por pólipo", dos 21 pacientes acromegálicos incluídos no estudo, 12 apresentaram colonoscopia convencional normal. Um total de 19 pólipos foram identificados em 9 pacientes. Dez dos 19 pólipos eram menores que 10 mm e 9 foram iguais ou maiores que 10 mm. A colonografia tomográfica computadorizada identificou 7 dos 9 pólipos >10 mm descritos pela colonoscopia convencional e somente 6 dos 10 pólipos pequenos detectados pela colonoscopia convencional. A análise histológica das lesões ressecadas revelaram 12 adenomas tubulares, 6 pólipos hiperplásicos e 1 adenoma túbulo-viloso com um foco de adenocarcinoma. CONCLUSÃO: São apresentados os primeiros relatos da realização de colonografia tomográfica computadorizada no rastreamento de pólipos colorretais em doentes com de acromegalia. Neste estudo, a colonografia tomográfica computadorizada realizou avaliação colorretal completa e sem complicações em todos os pacientes acromegálicos. A colonografia tomográfica computadorizada apresentou boa sensibilidade, especificidade e precisão para identificar pacientes acromegálicos com presen

  13. Nasal spray flu vaccine (image)

    Science.gov (United States)

    The flu vaccine can also be administered as a nasal spray instead of the usual injection method. It can be ... the recombinant influenza vaccine (RIV). The nasal spray flu vaccine (live attenuated influenza vaccine or LAIV) should not ...

  14. Lysosomal exoglycosidases in nasal polyps.

    Science.gov (United States)

    Chojnowska, Sylwia; Minarowska, Alina; Knaś, Małgorzata; Niemcunowicz-Janica, Anna; Kołodziejczyk, Paweł; Zalewska-Szajda, Beata; Kępka, Alina; Minarowski, Łukasz; Waszkiewicz, Napoleon; Zwierz, Krzysztof; Szajda, Sławomir Dariusz

    2013-01-01

    Nasal polyps are smooth outgrowths assuming a shape of grapes, formed from the nasal mucosa, limiting air flow by projecting into a lumen of a nasal cavity. Up to now the surgical resection is the best method of their treatment, but etiology and pathogenesis of the nasal polyps is not yet fully established. The aim of the study was the assessment of the selected lysosomal exoglycosidases activity in the nasal polyps. In this study the activity of β-galactosidase, α-mannosidase and α-fucosidase was determined in the tissue of the nasal polyps obtained from 40 patients (10F, 30M) and control tissues derived from mucosa of lower nasal conchas obtained during mucotomy from 20 patients (10F, 10M). We observed significant lower values of GAL, FUC and tendency to decrease of MAN and GLU concentration in nasal polyps (P) in comparison to control healthy nasal mucosa (C). In nasal polyp tissue (P) no differences of GAL, MAN and FUC specific activity in comparison to control mucosa (C) were found. Our research supports bioelectrical theory of the nasal polyps pathogenesis and directs attention at research on glycoconjugates and glycosidases of the nasal mucosa extracellular matrix. Copyright © 2013 Polish Otorhinolaryngology - Head and Neck Surgery Society. Published by Elsevier Urban & Partner Sp. z.o.o. All rights reserved.

  15. Nasalance Norms in Greek Adults

    Science.gov (United States)

    Okalidou, Areti; Karathanasi, Asimina; Grigoraki, Eleni

    2011-01-01

    The purposes of this study were to derive nasalance norms for monolingual Greek speakers, to examine nasalance scores as a function of gender and to draw cross-linguistic comparisons based on normative data. Participants read aloud a corpus of linguistic material, consisting of (1) a nasal text, an oral text and a balanced text; (2) a set of nasal…

  16. Nasalance Norms in Greek Adults

    Science.gov (United States)

    Okalidou, Areti; Karathanasi, Asimina; Grigoraki, Eleni

    2011-01-01

    The purposes of this study were to derive nasalance norms for monolingual Greek speakers, to examine nasalance scores as a function of gender and to draw cross-linguistic comparisons based on normative data. Participants read aloud a corpus of linguistic material, consisting of (1) a nasal text, an oral text and a balanced text; (2) a set of nasal…

  17. Nasal obstruction and human communication.

    Science.gov (United States)

    Malinoff, R; Moreno, C

    1989-04-01

    Nasal obstruction may cause a variety of communication disorders, particularly in children. The effects of nasal obstruction on hearing, speech, language, and voice are examined. Methods for assessing the effects of nasal obstruction are delineated, and recommendations for therapeutic interventions are described.

  18. Cosmetic and Functional Nasal Deformities

    Science.gov (United States)

    ... nasal complaints. Nasal deformity can be categorized as “cosmetic” or “functional.” Cosmetic deformity of the nose results in a less ... taste , nose bleeds and/or recurrent sinusitis . A cosmetic or functional nasal deformity may occur secondary to ...

  19. Calcitonin Salmon Nasal Spray

    Science.gov (United States)

    ... is important that you get enough calcium and vitamin D while you are using calcitonin salmon. Your doctor may prescribe supplements if your dietary ... examinations of the nose to make sure calcitonin salmon nasal spray is not ... such as vitamins, minerals, or other dietary supplements. You should bring ...

  20. Nasalization in Polish

    Science.gov (United States)

    Rubach, Jerzy

    1977-01-01

    This paper gives a complete account of vowel nasalization in Standard Polish. A distinction is made between obligatory and phonostylistic processes. Phonostylistic evidence may serve as a basis for making unambiguous decisions about the structure of underlying representations, intermediate phonological forms, and assimilation of borrowings to the…

  1. Nasal tooth: case report

    Energy Technology Data Exchange (ETDEWEB)

    Park, Si Hyun; Kim, Ji Hye; Hwang, Hee Young; Yang, Dal Mo; Kim, Hyung Sik; Park, Chol Heui [Gachon Medical School, Inchon (Korea, Republic of)

    2002-12-01

    Ectopic tooth is not uncommon and usually occurs in the palate and maxillary sinus. We report a case of ectopic tooth located in the nasal cavity, a rare site. The mass depicted by CT was highly attenuated, and central lucency was observed.

  2. Mycotic bovine nasal granuloma.

    Science.gov (United States)

    Conti Díaz, Ismael Alejandro; Vargas, Roberto; Apolo, Ada; Moraña, José Antonio; Pedrana, Graciela; Cardozo, Elena; Almeida, Edgardo

    2003-01-01

    A case of mycotic bovine nasal granuloma in a 10 year-old Jersey cow, produced by Drechslera halodes is presented. Histopathological sections showed abundant hyaline and pigmented extra and intracellular fungal structures together with a polymorphic cellular granuloma formed by neutrophils, lymphocytes, plasmocytes, histiocytes and giant cells of the Langhans type. It is the first case of mycotic bovine nasal granuloma recognized in Uruguay although this disease seems to be frequent according to the opinion of veterinarian specialists. Another similar clinical case also in a Jersey cow from the same dairy house with an intense cellular infiltrate rich in eosinophils without granulomatous image, together with extracellular hyaline and fuliginous fungal forms, is also referred for comparative purposes. Geotrichum sp. was isolated. The need of an early diagnosis and treatment of the disease is stressed.

  3. Health risks associated with inhaled nasal toxicants

    NARCIS (Netherlands)

    Feron, V.J.; Arts, J.H.E.; Kuper, C.F.; Slootweg, P.J.; Woutersen, R.A.

    2001-01-01

    Health risks of inhaled nasal toxicants were reviewed with emphasis on chemically induced nasal lesions in humans, sensory irritation, olfactory and trigeminal nerve toxicity, nasal immunopathology and carcinogenesis, nasal responses to chemical mixtures, in vitro models, and nasal dosimetry- and me

  4. Same Noses, Different Nasalance Scores: Data from Normal Subjects and Cleft Palate Speakers for Three Systems for Nasalance Analysis

    Science.gov (United States)

    Bressmann, Tim; Klaiman, Paula; Fischbach, Simone

    2006-01-01

    Nasalance scores from the Nasometer, the NasalView and the OroNasal System were compared. The data was collected from 50 normal participants and 19 hypernasal patients with cleft palate. The Nasometer had the lowest nasalance scores for the non-nasal Zoo Passage and that the OroNasal System had the lowest nasalance scores for the Nasal Sentences.…

  5. Tomografia convencional : estudo comparativo de imagens pre-operatorias para implantes dentais osteointegrados

    OpenAIRE

    2000-01-01

    Resumo: Os implantes osteointegrados tem sido cada vez mais utilizados para a reabilitação bucal de pacientes desdentados totais e parciais. O exame radiográfico é um exame auxiliar de fundamental importância, auxiliando desde o planejamento pré-operatório para colocação de implantes à proservação. A literatura mundial indica a utilização da Tomografia Convencional como exame pré-operatório para pacientes candidatos à receber poucos implantes ou implantes únicos. Este método radiográfico devi...

  6. Definitive magnetic nasal prosthesis for partial nasal defect

    Directory of Open Access Journals (Sweden)

    E Nagaraj

    2011-01-01

    Full Text Available Maxillofacial trauma refers to any injury to the face or jaw caused by physical force, trauma, the presence of foreign objects, animal or human bites, and burns. Facial defects can be devastating in their impact on physical structure and function of the affected individual, leading to potential compromises in quality of life. Restoration of facial defects, especially nasal defects, is a difficult challenge for both the surgeon and the prosthodontist. Here is a case report of partial nasal defect caused by trauma, rehabilitated with a magnetic nasal prosthesis made with silicone elastomers using mechanical and anatomical retentive aids.

  7. Nasalization in Galician and Portuguese

    OpenAIRE

    Regueira Fernández, Xosé Luís

    2010-01-01

    Gallego y portugués compartieron una parte de su historia, y en su evolución el comportamiento de las nasales ha jugado un importante papel. El gallego contemporáneo no presenta nasalidad contrastiva (vocales orales vs nasales), mientras que si las tiene el portugués. En este trabajo muestro que la descripción de la coarticulación velar (o nasalización) de las vocales en contacto con sonorantes nasales es relevante para la descripción de las lenguas tanto gallega como portuguesa y, adem...

  8. Vascular injuries in intestinal obstruction. The role of computed tomography; Complicazioni vascolari nelle occlusioni intestinali: ruolo della tomografia computerizzata

    Energy Technology Data Exchange (ETDEWEB)

    Vinci, R.; Angelelli, G.; Stabile Ianora, A.A.; Gaballo, A.; Rotondo, A. [Bari Univ., Bari (Italy). Dipt. di Medicina Interna e Medicina Pubblica, Serv. di Diagnostica per Immagini

    1999-09-01

    The paper investigates computerized tomography capabilities in showing vascular complications secondary to intestinal obstruction and for assessing the site and cause of obstruction. [Italian] Scopo del lavoro e' lo studio dell'uso della tomografia computerizzata nel riconoscimento di complicanze vascolari secondarie ad occlusione intestinale e della presenza, della natura e della sede dell'ostacolo alla canalizzazione intestinale.

  9. Nasal Delivery of High Molecular Weight Drugs

    OpenAIRE

    Erdal Cevher; Yıldız Ozsoy; Sevgi Gungor

    2009-01-01

    Nasal drug delivery may be used for either local or systemic effects. Low molecular weight drugs with are rapidly absorbed through nasal mucosa. The main reasons for this are the high permeability, fairly wide absorption area, porous and thin endothelial basement membrane of the nasal epithelium. Despite the many advantages of the nasal route, limitations such as the high molecular weight (HMW) of drugs may impede drug absorption through the nasal mucosa. Recent studies have focused particula...

  10. Bilateral cleft lip nasal deformity

    OpenAIRE

    Singh Arun; Nandini R.

    2009-01-01

    Bilateral cleft lip nose deformity is a multi-factorial and complex deformity which tends to aggravate with growth of the child, if not attended surgically. The goals of primary bilateral cleft lip nose surgery are, closure of the nasal floor and sill, lengthening of the columella, repositioning of the alar base, achieving nasal tip projection, repositioning of the lower lateral cartilages, and reorienting the nares from horizontal to oblique position. The multiplicity of procedures in the li...

  11. Coarticulation effects on the nasalization of vowels using nasal/voice amplitude ratio instrumentation.

    Science.gov (United States)

    Larson, P L; Hamlet, S L

    1987-10-01

    Nasal coarticulation in phonetically controlled nonsense syllables was investigated in four normal adult speakers. Nasalization was determined using the ratio of a nasal accelerometer signal amplitude to airborn microphone signal amplitude. Measurements of nasalization were made at the midpoint of vowels and at a constant time from the nasal consonant. Nasal acoustical coupling was greater for high vowels than for low vowels in all consonant contexts. Nasalization was also greater for vowels between two nasal consonants than for vowels between a nasal consonant and a fricative or stop. Results for progressive versus regressive assimilation depended on the measurement strategy. For within-vowel measurements made a constant time from the nasal consonant, prenasal vowels showed greater nasalization than postnasal vowels. This nasal accelerometric technique shows promise for clinical assessment of articulatory details of velar function.

  12. Angioleiomyoma of the Nasal Cavity

    Directory of Open Access Journals (Sweden)

    Arruda, Milena Moreira

    2014-01-01

    Full Text Available Introduction Vascular leiomyoma of the nasal cavity is an extremely rare tumor that represents less than 1% of all vascular leiomyomas. It is more prevalent in women between the fourth and sixth decades, reaching primarily the inferior nasal turbinates. Objectives Reporting and assisting the systematization of more accurate diagnostic methods in clinical and complementary investigation of vascular leiomyoma in the nasal cavity. Resumed Report We present the case of a 49-year-old woman diagnosed with vascular leiomyoma in the nasal cavity, which manifested mainly with nasal obstruction. During investigation, computer tomography was not diagnostic, the cytologic study was not conclusive, and according to the biopsy, it was a squamous papilloma. Conclusion We suggest that the technical difficulty in obtaining an adequate amount of material for preoperative biopsy, associated with the topography of the lesion in the vestibular nasal region, may have contributed to changing the postoperative diagnosis. Thus, pathologic study of the surgical fragment is the more accurate method for diagnosis.

  13. Angioleiomyoma of the Nasal Cavity

    Science.gov (United States)

    Arruda, Milena Moreira; Monteiro, Daniela Yasbek; Fernandes, Atilio Maximino; Menegatti, Vanessa; Thomazzi, Emerson; Hubner, Ricardo Arthur; Lima, Luiz Guilherme Cernaglia Aureliano de

    2014-01-01

    Introduction Vascular leiomyoma of the nasal cavity is an extremely rare tumor that represents less than 1% of all vascular leiomyomas. It is more prevalent in women between the fourth and sixth decades, reaching primarily the inferior nasal turbinates. Objectives Reporting and assisting the systematization of more accurate diagnostic methods in clinical and complementary investigation of vascular leiomyoma in the nasal cavity. Resumed Report We present the case of a 49-year-old woman diagnosed with vascular leiomyoma in the nasal cavity, which manifested mainly with nasal obstruction. During investigation, computer tomography was not diagnostic, the cytologic study was not conclusive, and according to the biopsy, it was a squamous papilloma. Conclusion We suggest that the technical difficulty in obtaining an adequate amount of material for preoperative biopsy, associated with the topography of the lesion in the vestibular nasal region, may have contributed to changing the postoperative diagnosis. Thus, pathologic study of the surgical fragment is the more accurate method for diagnosis. PMID:25992133

  14. A entomoftorose nasal

    Directory of Open Access Journals (Sweden)

    Zilton A. Andrade

    1972-10-01

    Full Text Available São apresentados os dados clínico-patológicos de dois casos de entomoftorose nasal, nova doença humana causada por um ficomiceto - Entomophthora coronata. Os pacientes, uma menina e um homem, com 8 e 44 anos de idade respectivamente, apresentaram doença localizada, com nódulos no nariz e região paranasal, edema e deformação da face. O parasito foi isolado do primeiro caso, mas todas as tentativas para isolá-lo no segundo caso resultaram negativas. Histologicamente, havia reação granulomatosa, fibrose e edema, em torno de hifas não septadas, as quais exibiam envólucro eosinófilo amorfo em torno. Foram demonstrados anticorpos circulantes contra, as hifas do E. coronata no soro de um dos pacientes. O material eosinófilo em torno das hifas continha fibrina e material auto-fluorescente sob luz ultra-violeta, provavelmente lipofuscina, mas não foram demonstrados anticorpos ou antígenos nesta área. A apresentação destes casos, os primeiros a serem descritos no Brasil, é acompanhado, de uma revisão geral do assunto, pois tal poderá vir a ser de interesse para aqueles que estudam os problemas da patologia tropical em nosso meio.

  15. Image diagnosis of nasal bone fracture

    Energy Technology Data Exchange (ETDEWEB)

    Hirota, Yoshiharu; Shimizu, Yayoi; Iinuma, Toshitaka.

    1988-04-01

    Twenty cases of nasal bone fractures were evaluated as to the types of fractures based upon HRCT findings. Conventional X-Ray films for nasal bones were analyzed and compared with HRCT findings. Nasal bone fractures were classified into lateral and frontal fractures. HRCT images were evaluated in three planes including upper, middle and lower portions of the nasal bone. Fractures favored males of teens. Lateral fracture gave rise to the fractures of the nasal bone opposite to the external force, loosening of the ipsilateral nasomaxillary sutures and fractures of the frontal process of the maxilla. Conventional X-Ray films were reevaluated after HRCT evaluation and indications of nasal bone fractures were determined. In addition to the discontinuity of the nasal dorsum, fracture lines parallel to and beneath the nasal dorsum and indistinct fracture lines along the nasomaxillary sutures are the indication of nasal bone fractures by conventional X-Ray films.

  16. Bilateral cleft lip nasal deformity

    Directory of Open Access Journals (Sweden)

    Singh Arun

    2009-01-01

    Full Text Available Bilateral cleft lip nose deformity is a multi-factorial and complex deformity which tends to aggravate with growth of the child, if not attended surgically. The goals of primary bilateral cleft lip nose surgery are, closure of the nasal floor and sill, lengthening of the columella, repositioning of the alar base, achieving nasal tip projection, repositioning of the lower lateral cartilages, and reorienting the nares from horizontal to oblique position. The multiplicity of procedures in the literature for correction of this deformity alludes to the fact that no single procedure is entirely effective. The timing for surgical intervention and its extent varies considerably. Early surgery on cartilage may adversely affect growth and development; at the same time, allowing the cartilage to grow in an abnormal position and contributing to aggravation of deformity. Some surgeons advocate correction of deformity at an early age. However, others like the cartilages to grow and mature before going in for surgery. With peer pressure also becoming an important consideration during the teens, the current trend is towards early intervention. There is no unanimity in the extent of nasal dissection to be done at the time of primary lip repair. While many perform limited nasal dissection for the fear of growth retardation, others opt for full cartilage correction at the time of primary surgery itself. The value of naso-alveolar moulding (NAM too is not universally accepted and has now more opponents than proponents. Also most centres in the developing world have neither the personnel nor the facilities for the same. The secondary cleft nasal deformity is variable and is affected by the extent of the original abnormality, any prior surgeries performed and alteration due to nasal growth. This article reviews the currently popular methods for correction of nasal deformity associated with bilateral cleft lip, it′s management both at the time of cleft lip repair

  17. Anatomia coronária por tomografia computorizada multi-corte e principais variantes

    OpenAIRE

    Gomes, André Santos Teixeira

    2010-01-01

    A avaliação das artérias coronárias assume uma elevada importância na prática clínica actual dado que as doenças cardiovasculares são a primeira causa de morte nos países desenvolvidos. A técnica de eleição para o estudo coronário é a Angiografia Coronária por cateterismo, porém, esta acarreta alguns riscos. A Coronáriografia por Tomografia Computorizada (CTC) multi-corte tem vindo a posicionar-se como o melhor exame não invasivo para avaliação coronária, graças à rápida evoluç...

  18. Cardiac tamponade in an infant during contrast infusion through central venous catheter for chest computed tomography; Tamponamento cardiaco durante infusao de contraste em acesso venoso central para realizacao de tomografia computadorizada do torax em lactente

    Energy Technology Data Exchange (ETDEWEB)

    Daud, Danilo Felix; Campos, Marcos Menezes Freitas de; Fleury Neto, Augusto de Padua [Hospital Geral de Palmas, TO (Brazil)

    2013-11-15

    Complications from central venous catheterization include infectious conditions, pneumothorax, hemothorax and venous thrombosis. Pericardial effusion with cardiac tamponade hardly occurs, and in infants is generally caused by umbilical catheterization. The authors describe the case of cardiac tamponade occurred in an infant during chest computed tomography with contrast infusion through a central venous catheter inserted into the right internal jugular vein. (author)

  19. Elementary representative sizes of soil attributes via attenuation of gamma rays and computerized tomography; Tamanhos elementares representativos de atributos do solo via atenuacao de raios gama e tomografia computadorizada

    Energy Technology Data Exchange (ETDEWEB)

    Borges, Jaqueline Aparecida Ribaski

    2015-07-01

    In this study, the Computed Tomography (CT) and gamma-ray attenuation (GRA) techniques were used in the investigation of representative sample sizes for attributes related to soil structure. First of all, the representative elementary length (REL) for experimental measurements of soil mass attenuation coefficient (μes), of samples from a sandy and a clayey soil, was analyzed. The study was conducted with two radioactive sources ({sup 241}Am and {sup 137}Cs), three collimators (2 - 4 mm diameters), and 14 thickness (x) samples (2-5 cm). From these analyzes, it was possible to identify an ideal thickness range for each of the studied sources (2-4 cm and 12-15 cm for the sources of {sup 241}Am and {sup 137}Cs, respectively). The application of such results in representative elementary area evaluations, in clayey soil clods via CT, indicated that experimental soil mass attenuation coefficient average values obtained for x>4 cm and source {sup 241}Am might induce the use of samples which are not large enough for soil bulk density evaluations. Subsequently, μCT images with a total volume of 39×39×33 mm{sup 3} and spatial resolution of 60 μm were used for macroporous system morphological characterization of a Rhodic Ferralsol with clayey texture, under no-till (NT) and conventional till (CT) systems. Attributes as macroporosity (MAP), number of macropores (NMAP), tortuosity (τ) and connectivity (C) of the pores were assessed. The C degree was estimated based on the Euler-Poincare characteristic (EPC). Once 3D images enable the study of these attributes in different sample volumes, the proposed study is ideal for the analysis of representative elementary volume (REV). Usually, the selection of subvolumes for REV analysis occurs concentrically to a small volume or in adjacent positions. Here, we introduced a new method for selecting the positions of subvolumes, which are randomly chosen within the total image volume (random selection). It was observed that higher fluctuations in amplitude of each analyzed property values occurred for smaller subvolumes and random selection. When these positions are randomly selected, all regions of the sample have the same probability of occurrence. Thus, the subvolumes can be selected from regions that exhibit similar characteristics, or which are quite different from each other. The results allowed the study of each of these attributes in function of the analyzed sample volume. Such analysis enabled the identification of a REV for MAP and τ measurements for both soils. However, NMAP and CEP showed no indication of stabilization within the total sample volume analyzed (39×39×33 mm{sup 3}). From this study, it was possible to detect the influence of each management systems (NT and CT) on the macroporous system. In general, results obtained for soil under PC showed higher regularity, which is probably due to its homogenization induced by the plowing, conducted twice a year. (author)

  20. Analysis of edentulous maxillae using computed tomography and panoramic radiography in the surgical planning of dental implants; Analise da maxila edentula por meio da tomografia computadorizada e radiografia panoramica no planejamento cirurgico de implantes dentarios

    Energy Technology Data Exchange (ETDEWEB)

    Sahuinco, Humberto Lazaro Choquepuma; Souza, Ricardo Pires de [Complexo Hospitalar Heliopolis (HOSPHEL), Sao Paulo, SP (Brazil). Curso de pos-graduacao em Ciencias da Saude]. E-mail: humbertchs@hotmail.com

    2006-04-15

    Objective: to determine agreement of three observers on analysis of linear measurements of edentulous maxillae using computed tomography and panoramic radiography in the surgical planning of dental implants. Material and Method: the samples of 17 patients were analyzed with computed tomography and panoramic radiography. Linear measurements obtained from both methods were made at the following anatomical points: left tuberosity, left canine pillar, incisive foramen, right canine pillar and right tuberosity. Kendall's W test was applied to assess the level of agreement. Results: measured W-values from the samples of the anatomical points mentioned above, analyzed with panoramic radiography and computed tomography, were: 0.75 and 0.901; 0.916 and 0.956; 0.843 and 0.964; 0.963 and 0.931; 0.95 and 0.89 respectively. Statistical analysis showed that there was no statistically significant difference. Conclusion: agreement occurred in the measurements of variables.That means that if the three observers were to select an implant to be placed in each of the anatomical regions studied, there would be a good chance whey would choose the same type. (author)

  1. Computed tomography prospective study of pleural-pulmonary changes after abdominal surgery : assessment of associated risk factors; Estudo prospectivo por tomografia computadorizada das alteracoes pleuro-pulmonares apos cirurgia abdominal: avaliacao dos fatores de risco associados

    Energy Technology Data Exchange (ETDEWEB)

    Rossi, Luis Antonio [Pontificia Univ. Catolica de Sao Paulo, SP (Brazil). Centro de Ciencias Medicas e Biologicas]. E-mail: luizrossimd@uol.com.br; Bromberg, Sansom Henrique [Instituto de Assistencia Medica ao Servidor Publico Estadual de Sao Paulo (IAMSPE), Sao Paulo, SP (Brazil). Curso de Pos-graduacao em Gastroenterologia Cirurgica

    2005-07-01

    Postoperative pleural-pulmonary changes (PPC) are very common following elective abdominal surgery, resolving without clinical manifestations in most patients. The incidence and risk factors associated are unknown. Objective: to determine the incidence of PPC and possible association with risk factors using computerized tomography (CT). Material and method: thirty seven patients submitted to elective abdominal surgery were prospectively analyzed using CT performed in the preoperative period and 48 hours after surgery. The PPC was scored from 0 to III. The risk factors evaluated were: age, sex, obesity, smoking history, alcoholism, comorbid conditions, cancer, ASA classification, duration of surgery, surgical incision type and number of days of hospitalization. Results: Pleura effusion was detected by CT in 70.3% (26/37) of the patients and pulmonary atelectasis in 75.5% (28/37). Grade I and II PPC was found in 59.5% (22/37) of the patients and grade III in 21.6% (8/37). Two (5.4%) of these patients developed serious pulmonary complications whereas one patient died. Surgery due to cancer, class ASA >2, longitudinal incision and > 15 cm showed statistical significance and were associated with pleural effusion. The hospitalization was over 2.4 longer for patients with PPC. Conclusion: PPC is frequently seen in patients submitted to abdominal surgery. The use of the CT for the detection of pulmonary atelectasis and pleural effusion proved to be effective. Most cases of PPC are self-limited, resolving without symptoms. (author)

  2. Comparative analysis of quality control tests on computed tomography in accordance with national and international laws; Analise comparativa dos testes de controle de qualidade em tomografia computadorizada de acordo com as legislacoes nacional e internacional

    Energy Technology Data Exchange (ETDEWEB)

    Ramos, Fernando S.; Vasconcelos, Rebeca S.; Goncalves, Marcel S.; Oliveira, Marcus V.L. de, E-mail: fernando_siramos@hotmail.com, E-mail: marcusradiology@gmail.com [Instituto Federal da Bahia (IFBA), Salvador, BA (Brazil)

    2014-07-01

    The objective of this study is to perform a comparative analysis between the Brazilian legislation and internationals protocols, with respect to the quality control tests for computerized tomography. We used 07 references, published from 1998-2012: the Protocolo Brasileiro - Portaria 453/98 SVS/MS and the Guia de Radiodiagnostico Medico da ANVISA; Quality Assurance Programme for Computed Tomography: Diagnostic and Therapy Applications of the IAEA; European Protocol - European Guidelines on Quality Criteria for Computed Tomography of the EUR No. 16262 EN; Radiation Protection No. 162 - Criteria for Acceptability of Medical Radiology, Nuclear Medicine and Radiotherapy of the European Commission; the Protocols of Control de Calidad en Radiodiagnostico IAEA / ARCAL XLIX; and the Protocolo Espanol de Control de Calidad en Radiodignostico. The comparative analysis of these legislations was based on aspects of tolerance / limit, frequency and objectives of the recommended tests. Were found 18 tests in the Brazilian legislation. The tests were grouped according to their nature (dosimetric tests / exposure and geometric tests and image quality tests). Among the evaluated protocols was identified divergence between tests contained in the documents and the criteria of assessment set out in this work. It is clear, moreover, that for certain documents are not observed tolerances, well-defined methodologies and even frequency of testing. We conclude that the current legislation in Brazil differs in certain respects from international protocols analyzed, although this has a great numbers of quality control tests. However, it is necessary that the Brazilian legislation takes into account technological advances presented to time.

  3. Práticas cirúrgicas baseadas em evidências: tomografia computadorizada helicoidal no diagnóstico da apendicite aguda Evidence-based surgical practices: helical computed tomography in acute appendicitis diagnosis

    Directory of Open Access Journals (Sweden)

    Carlos Alberto Guimarães

    2008-08-01

    Full Text Available Os cirurgiões são instados a não somente ler os artigos dos periódicos, mas também a compreendê-los e analisá-los criticamente quanto à validade. Eles cuidam melhor dos seus pacientes se são capazes de analisar criticamente a literatura e aplicar os resultados a sua prática. Este é o segundo artigo de uma série - Práticas Cirúrgicas Baseadas em Evidência - que tem por objetivo apresentar a avaliação crítica de um teste diagnóstico.Surgeons are told that they need not only read journal articles, but also understand them and make a critical appraisal of their validity. They offer better care if they are able to appraise critically the original literature and apply the results to their practice. This is the second article of a series - Evidence-Based Surgical Practices - which focus on critical appraisal of a diagnostic test.

  4. Optimization of recommendations for abdomen computerized tomography based on reconstruction filters, voltage and tube current; Otimizacao de protocolos de tomografia computadorizada de abdome com base nos filtros de reconstrucao, tensao e corrente do tubo

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    Silveira, Vinicius da Costa

    2015-07-01

    The use of computed tomography has increased significantly over the past decades. In Brazil the use increased more than twofold from 2008 to 2014, in the meantime the abdomen procedures have tripled. The high frequency of this procedure combined by the increasing collective radiation dose in medical exposures, has resulted development tools to maximize the benefit in CT images. This work aimed to establish protocols optimized in abdominal CT through acquisitions parameters and reconstructions techniques based on filters kernels. A sample of patients undergoing abdominal CT in a diagnostic center of Rio de Janeiro was assessed. Had been collected patients information and acquisitions parameters. The phantoms CT image acquisitions were performed by using different voltage values by adjusting the tube current (mAs) to obtain the same value from CTDI{sub vol} patients with normal BMI. Afterwards, the CTDIvol values were reduced by 30%, 50% and 60%. All images were reconstructed with low-contrast filters (A) and standard filters (B). The CTDIvol values for patients with normal BMI were 7% higher than in patients with underweight BMI and 30%, 50% and 60% lower than the overweight, obese I and III patients, respectively. The evaluations of image quality showed that variation of the current (mA) and the reconstruction filters did not affect the Hounsfield values. When the contrast-to-noise ratio (CNR) was normalized to CTDIvol, the protocols acquired with 60% reduction of CTDIvol with 140 kV and 80 kV showed CNR 6% lower than the routine. Modifications of the acquisition parameters did not affect spatial resolution, but the post-processing with B filters reduced the spatial frequency by 16%. With reduced the dose of 30%, lesions in the spleen had the CNR higher than 10% routine protocols with 140 kV acquired and post-processed to filter A. The image post-processing with a filter A with a 80kV voltage provided CNR values equal to the routine for the liver lesions with a 30% reduction in dose. This study demonstrated that the reduction in tube voltage and the image post-processing filter to enable a reduction in the radiation dose by 30%. (author)

  5. Evaluation of standard and use tendency of image diagnosis exams in Brazil with emphasis in pediatric computerized tomography; Avaliacao do padrao e tendencia de uso de exames de diagnostico por imagem no Brasil com enfase em tomografia computadorizada pediatrica

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    Dovales, Ana Cristina Murta

    2016-07-01

    There is little information on developing countries about the use of diagnostic imaging procedures and the doses associated with radiological examinations. This study assessed the pattern and trend of diagnostic imaging usage in outpatients of the Brazilian Unified Health System (SUS) by modality and examined body part. Emphasis was given to computed tomography (CT) scans for which the analysis was extended to the private health care sector and included the evaluation of age at examination distribution, and dose estimation for children and young adults. Information on the use of diagnostic imaging procedures among SUS outpatients was obtained from the Outpatient Information System (SIA) of the Department of Information Technology of SUS (DATASUS). Data on the use of CT in the private health care sector were extracted from the Radiological Information Systems (RIS) of 25 private radiology services in 8 Brazilian cities. Effective doses and absorbed doses on organs of interest were estimated individually for 4,497 patients younger than 20 years of age using CT scan technical parameters and Monte Carlo simulations of radiation transport. Between 2002 and 2012 it was observed that conventional radiology was the most frequent modality of diagnostic imaging in SUS outpatients, but more sophisticated modalities, such as CT and magnetic resonance imaging, had the highest growth rates over the study period. The most frequent CT scan in SUS outpatients between 2001 and 2011 was the head/neck exam, but abdomen/pelvis examinations were the ones that grew the most. Patients up to 20 years of age made approximately 13% and 9% of the CT examinations between 2008 and 2014 in the public and private health care systems, respectively. About one-third of the private-sector patients had more than one CT scan in this period. There was great variation in doses, even for the same type of procedure in patients of the same age group. The highest mean effective dose was 13.5 mSv estimated for abdomen/pelvis CT in children younger than one year of age. The highest absorbed doses were estimated for the brain after head/neck CT (23.8 to 29.0 mGy), which was the most common type of CT in children and young adults in the study period. The intense increase, the magnitude of the estimated doses and the large proportion of pediatric CT scans in Brazil point out to the need for initiatives to promote appropriate justification and optimization of these examinations in Brazil. (author)

  6. Avaliação do canal incisivo da mandíbula por meio de radiografia panorâmica e tomografia computadorizada por feixe cônico

    OpenAIRE

    2012-01-01

    A região entre os forames mentuais era considerada uma área segura para realização de procedimentos cirúrgicos. Na literatura encontramos algumas complicações que podem surgir durante os procedimentos cirúrgicos, devido à variação anatômica do nervo alveolar inferior, que pode estender-se formando o canal do nervo incisivo, com uma extensão anterior ao forame mentual. A radiografia panorâmica é uma técnica radiográfica extra-oral amplamente utilizada. Entretanto, é uma imagem bi-dimensional d...

  7. Atresia brônquica congênita: relato de dois casos. Contribuição da tomografia computadorizada ao diagnóstico Congenital bronchial atresia: report of two cases. Contribution of CT scan to diagnosis

    Directory of Open Access Journals (Sweden)

    ALECSANDRA CALIL MOYSES FAURE

    2000-06-01

    Full Text Available Atresia brônquica congênita é uma anomalia rara, caracterizada pela presença de broncocele com hiperinsuflação distal. Relatam-se dois casos dessa anomalia e descrevem-se os achados clínicos e radiológicos que suportam o seu diagnóstico sem a necessidade de uso de métodos invasivos ou cirúrgicos.Bronchial atresia is a rare, congenital anomaly characterized by the presence of bronchocele with distal hyperinflation. The authors report two cases of segmental bronchial atresia and describe the clinical and roentgenographic findings supporting the diagnosis in the absence of other invasive diagnostic modalities or surgical exploration.

  8. Evaluation of X ray radiation doses in pediatric examinations of cranial computerized tomography based on optimization studies; Avaliacao das doses de radiacao X em exames pediatricos de tomografia computadorizada de cranio com base em estudos de otimizacao

    Energy Technology Data Exchange (ETDEWEB)

    Daros, Kellen Adriana Curci

    2005-07-01

    This paper identifies the technical conditions for CT examination which offers lowest absorbed dose and to attend the manufacturer recommendations as far the spatial resolution is concerned. The paper evaluates the absorbed dose during cranial CT in up to 6 years children satisfying the technical condition recommended by the manufacturer and routine clinical conditions. The paper also established a quantitative relationship among the absorbed dose and its distribution in the cranial regions of pediatric patients up to 6 years old in a way to estimate the doses subject to optimized conditions

  9. Dipyridamole stress myocardial perfusion by computed tomography in patients with left bundle branch block; Perfusao miocardica de estresse com dipiridamol por tomografia computadorizada em pacientes com bloqueio de ramo esquerdo

    Energy Technology Data Exchange (ETDEWEB)

    Cabeda, Estevan Vieira; Rochitte, Carlos Eduardo; Nomura, Cesar Higa; Parga, Jose Rodrigues; Avila, Luiz Francisco Rodrigues; Falcao, Andrea Maria Gomes; Soares Junior, Jose [Instituto do Coracao (InCor), Universidade de Sao Paulo (USP), Sao Paulo, SP (Brazil)

    2015-12-15

    Background: Functional tests have limited accuracy for identifying myocardial ischemia in patients with left bundle branch block (LBBB). Objective: To assess the diagnostic accuracy of dipyridamole-stress myocardial computed tomography perfusion (CTP) by 320-detector CT in patients with LBBB using invasive quantitative coronary angiography (QCA) (stenosis ≥ 70%) as reference; to investigate the advantage of adding CTP to coronary computed tomography angiography (CTA) and compare the results with those of single photon emission computed tomography (SPECT) myocardial perfusion scintigraphy. Methods: Thirty patients with LBBB who had undergone SPECT for the investigation of coronary artery disease were referred for stress tomography. Independent examiners performed per-patient and per-coronary territory assessments. All patients gave written informed consent to participate in the study that was approved by the institution's ethics committee. Results: The patients' mean age was 62 ± 10 years. The mean dose of radiation for the tomography protocol was 9.3 ± 4.6 mSv. With regard to CTP, the per-patient values for sensitivity, specificity, positive and negative predictive values, and accuracy were 86%, 81%, 80%, 87%, and 83%, respectively (p = 0.001). The per-territory values were 63%, 86%, 65%, 84%, and 79%, respectively (p < 0.001). In both analyses, the addition of CTP to CTA achieved higher diagnostic accuracy for detecting myocardial ischemia than SPECT (p < 0.001). Conclusion: The use of the stress tomography protocol is feasible and has good diagnostic accuracy for assessing myocardial ischemia in patients with LBBB. (author)

  10. Tomografia computadorizada da matriz óssea mineralizada heteróloga fragmentada e metilmetacrilato na reparação de falhas ósseas segmentares produzidas em tíbia de coelhos

    OpenAIRE

    Freitas, S.h.; R. G. S. Dória; F.S. Mendonça; Santos, M.D.; R. Moreira; R.S. Simões; L.M. Camargo; Marques, A. T. C.; Simões,M. J.

    2012-01-01

    A 6mm segmental defect was performed on the metaphyseal region of the tibia of 12 rabbits and the autoclaved fragmented heterolog cortical bone conserved in glycerin (98%) and methylmethacrylate was used as a bone graft for the reconstruction. The graft was placed in the receptor bed and its integration was evaluated by computed tomography after 30, 60 and 90 days. There was gradual bone graft incorporation in the receptor bed during the time in 100% of the cases. Fragmented cortical bone het...

  11. Computed tomography in Brazil: frequency and pattern of usage among inpatients of the Unified Health System (SUS); Tomografia computadorizada no Brasil: frequencia e padrao de uso em pacientes internados no Sistema Unico de Saude (SUS)

    Energy Technology Data Exchange (ETDEWEB)

    Dovales, Ana Cristina M.; Souza, Andressa A. de; Veiga, Lene H.S., E-mail: adovales@ird.gov.br [Instituto de Radioprotecao e Dosimetria (IRD/CNEN-RJ), Rio de Janeiro, RJ (Brazil)

    2015-04-15

    This paper shows the frequency, pattern and trend of computed tomography use in inpatients of the Brazilian public health care system (SUS), from 2008 to 2011. Data were extracted from an Internet database provided by SUS. Head/neck examinations were the most frequent type of CT over the study period. The use of CT increased over time, with the greatest increase being observed for CT of extremities. (author)

  12. Retroperitoneal and pelvic plexiform neurofibromatosis: computed tomography and magnetic resonance findings - case report and review of literature; Neurofibromatose plexiforme retroperitoneal e pelvica: aspectos na tomografia computadorizada e ressonancia magnetica - relato de caso e revisao da literatura

    Energy Technology Data Exchange (ETDEWEB)

    Cancado, Daniel Dutra; Bahia, Paulo Roberto Valle [Universidade Federal, Rio de Janeiro, RJ (Brazil). Dept. de Radiologia]. E-mail: danieldutra@ wnetrj.com.br; Leijoto, Camila Cruz [Universidade Federal, Rio de Janeiro, RJ (Brazil). Dept. de Reumatologia; Carvalho, Carlos Eduardo Souza [Universidade Federal, Rio de Janeiro, RJ (Brazil). Dept. de Anatomia Patologica

    2005-05-15

    The authors report a case of neurofibromatosis type I, characterized by multiple plexiform neurofibromas in the retroperitoneum and pelvis. Computed tomography showed markedly hypodense lesions involving mainly the psoas and the paravertebral regions, findings which could mimic other diseases such as abscesses and lymphadenopathy. Magnetic resonance imaging was useful to better evaluate the extension and internal structure of the neurofibromas. (author)

  13. Dysgenesis of the corpus callosum and associated malformaaation{sup :} computed tomography and magnetic resonance imaging findings; Disgenesia do corpo caloso e mas-formacoes associadas: achados de tomografia computadorizada e ressonancia magnetica

    Energy Technology Data Exchange (ETDEWEB)

    Montandon, Cristiano; Montandon Junior, Marcelo Eustaquio [Colegio Brasileiro de Radiologia e Diagnostico por Imagem (CBR), Sao Paulo, SP (Brazil); Ribeiro, Flavia Aparecida de Sousa; Lobo, Leonardo Valadares Barbosa; Teixeira, Kim-Ir-Sen Santos [Goias Univ., Goiania (Brazil). Hospital de Clinicas. Dept. de Diagnostico por Imagem e Anatomia Patologica]. E-mail: cabeca2@terra.com.br

    2003-10-01

    Callosal dysgenesis is a malformation of the corpus callosum with origins in the embryogenesis of the telencephalon. We reviewed the computed tomography and magnetic resonance imaging findings of 11 patients with callosal dysgenesis and one patient with normal corpus callosum associated with a lipoma. The patients were divided into three distinct groups: total agenesis (three patients), partial agenesis (six patients) and hypoplasia (two patients). Associated abnormalities were observed in nine patients, including Chiari II malformation (one patient), schizencephaly (one patient), interhemispheric cyst (two patients), Dandy-Walker cyst (one patient), nodular heterotopy (one patient) and lipoma of the corpus callosum (four patients). This paper presents a review that may contribute to the diagnosis of these disorders. (author)

  14. High-resolution computed tomography interpretation model for differential diagnosis of chronic interstitial lung diseases; Modelo de interpretacao da tomografia computadorizada de alta resolucao do diagnostico diferencial das doencas intersticiais cronicas

    Energy Technology Data Exchange (ETDEWEB)

    Silva, C. Isabela S.; Mueller, Nestor L. [Vancouver General Hospital, BC (Canada). Dept. of Radiology]. E-mail: nmuller@vanhosp.bc.ca

    2005-04-01

    The recognition and differential diagnosis of the various patterns of abnormality seen on high-resolution computed tomography (HRCT) are important in the evaluation of patients with chronic interstitial lung diseases. Various patterns of abnormality have been described in the literature, which sometimes are overlapped. Distinction between the various patterns can be difficult particularly for residents and radiologists who are not familiarized with these images. The authors illustrate the characteristic patterns of abnormality seen in chronic interstitial lung diseases and propose a simple interpretation algorithm based on the pattern and distribution of the findings. The algorithm includes the six main patterns of abnormality seen on HRCT: septal lines, reticular pattern, cystic pattern, nodular pattern, ground-glass opacities and consolidation. (author)

  15. Transitional cell carcinoma arising from a bladder diverticulum: computed tomography findings - case report; Carcinoma de celulas transicionais em um diverticulo de bexiga: achados na tomografia computadorizada - relato de caso

    Energy Technology Data Exchange (ETDEWEB)

    Almeida Junior, Jose Guiomar de; Santos, Maria Lucia de Oliveira; Vabo, Telmo Pimentel do; Marchiori, Edson [Universidade Federal Fluminense, Niteroi, RJ (Brazil). Dept. de Radiologia]. E-mail: edmarchiori@zipmail.com.br; Torres Neto, Gilberto [Hospital Universitario Pedro Ernesto, Rio de Janeiro, RJ (Brazil). Dept. de Radiologia; Silva, Klezer Gaspar Carvalho da [Hospital de Clinicas de Niteroi, RJ (Brazil)

    2003-03-01

    We report the case of a patient with a transitional cell carcinoma arising from a bladder diverticulum that was diagnosed by computed tomography. Although there is a greater incidence of neoplasms in bladder diverticula, its occurrence is uncommon and the diagnosis is at times difficult. The role, the importance and limitations of computed tomography in the diagnosis of transitional cell carcinoma arising from a bladder diverticulum are discussed. (author)

  16. Post-traumatic temporal lobe lesions: surgical decision making based on CT scan findings Lesões traumáticas do lobo temporal: indicações cirúrgicas baseadas na tomografia computadorizada

    Directory of Open Access Journals (Sweden)

    Alexandre Varella Giannetti

    2005-06-01

    Full Text Available BACKGROUND: The indication for surgical treatment of post-traumatic parenchymal lesions in the temporal lobe remains controversial. OBJECTIVE: We reviewd the tomographic parameters that might be useful in making surgical decisions. METHOD: The tomographic findings of 69 patients were analyzed in a retrospective manner considering: 1 the effects of the lesion (classified into 4 variables: midline shift, status of the cisterns, status of the ventricles, and status of the peripheral sulci; and 2 the characteristics of the lesion: anterior, posterior or anteroposterior location (as defined by a coronal plane tangent to the cerebral peduncles and its mediolateral diameter. RESULTS: When none or only one of the aforementioned variables was found to be altered, conservative treatment was instituted (22 out of 38 lesions. In two cases, all four variables were altered, and surgery was performed in both. Anterior, anteroposterior and posterior lesions measuring 21, 23 and 28 mm in diameter, respectively, had a 50% chance of surgical removal. CONCLUSION: Amongst the patients who underwent surgical intervention, the more anterior the location of the temporal lobe lesion, the smaller the diameter.INTRODUÇÃO: A indicação do tratamento cirúrgico das lesões parenquimatosas temporais de origem traumática é controversa. Analisaram-se os parâmetros tomográficos que poderiam ser úteis nesta decisão terapêutica. MÉTODO: Os achados tomográficos de 69 patientes foram analisados retrospectivamente em relação a: 1 efeitos das lesões (classificados em 4 variáveis: desvio de estruturas medianas, estado das cisternas, dos ventrículos e dos sulcos periféricos; e 2 características das lesões: localização anterior, posterior ou ântero-posterior (definida por um plano coronal tangente aos pedúnculos cerebrais e diâmetro médio-lateral. RESULTADOS: Quando nenhuma ou uma das variáveis acima mencionadas foi encontrada alterada, foi instituído o tratamento conservador (22 em 38 lesões. Em dois casos, as quatro variáveis estavam alteradas, sendo instituído o tratamento cirúrgico. Lesões anteriores, ântero-posteriores e posteriores medindo 21, 23 e 28 mm, respectivamente, tiveram 50% de chance de serem removidas. CONCLUSÃO: Nos casos operados, quanto mais anterior a lesão esteve no lobo temporal, menor foi seu diâmetro.

  17. Ground-glass opacity in diffuse lung diseases: high-resolution computed tomography-pathology correlation; Opacidades em vidro fosco nas doencas pulmonares difusas: correlacao da tomografia computadorizada de alta resolucao com a anatomopatologia

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    Santos, Maria Lucia de Oliveira; Vianna, Alberto Domingues; Marchiori, Edson [Universidade Federal Fluminense, Niteroi, RJ (Brazil). Dept. de Radiologia; Souza Junior, Arthur Soares [Faculdade de Medicina de Sao Jose do Rio Preto (FAMERP), SP (Brazil). Disciplina de Radiologia; Moraes, Heleno Pinto de [Universidade Federal Fluminense, Niteroi, RJ (Brazil). Dept. de Patologia]. E-mail: edmarchiori@zipmail.com.br

    2003-12-01

    Ground-glass opacity is a finding frequently seen in high-resolution computed tomography examinations of the chest and is characterized by hazy increased attenuation of lung, however without blurring of bronchial and vascular margins. Due to its un specificity, association with other radiological, clinical and pathological findings must be considered for an accurate diagnostic interpretation. In this paper were reviewed 62 computed tomography examinations of patients with diffuse pulmonary diseases of 14 different etiologies in which ground-glass opacity was the only or the most remarkable finding, and correlated this findings with pathology abnormalities seen on specimens obtained from biopsies or necropsies. In pneumocystosis, ground-glass opacities correlated histologically with alveolar occupation by a foaming material containing parasites, in bronchiole alveolar cell carcinoma with thickening of the alveolar septa and occupation of the lumen by mucus and tumoral cells, in paracoccidioidomycosis with thickening of the alveolar septa, areas of fibrosis and alveolar bronchopneumonia exudate, in sarcoidosis with fibrosis or clustering of granulomas and in idiopathic pulmonary fibrosis with alveolar septa thickening due to fibrosis. Alveolar occupation by blood was found in cases of leptospirosis, idiopathic hemo siderosis, metastatic kidney tumor and invasive aspergillosis whereas oily vacuole were seen in lipoid pneumonia, proteinaceous and lipo proteinaceous material in silico proteinosis and pulmonary alveolar proteinosis, and edematous fluid in cardiac failure. (author)

  18. Radiological protection for multislice computed tomography in pregnant women in the supplementary diagnosis of fetal Thanatophoric dysplasia; Cuidados com protecao radiologica durante tomografia computadorizada multslice em gestante no diagnostico complementar de displasia tanatoforica fetal

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    Castro, Jose Thiago de Souza de; Lima, Rogerio Aparecido; Ferreira, Josias dos Santos, E-mail: jthiagoc@hc.unicamp.br, E-mail: rxroger@hc.unicamp.br, E-mail: josiasrx@hotmail.com [Universidade Estadual de Campinas (HC/UNICAMP), SP (Brazil). Hospital de Clinicas. Dept. de Radiologia

    2014-07-01

    Thanatophoric Dysplasia is a rare genetic disorder that leads to the normal growth of the individual leaving him with short stature deterrent. Patients with this syndrome have disproportionately short limbs, with extra skin folds, narrowing chest, small ribs, underdeveloped lungs and hydrocephalus. The Thanatophoric Dysplasia can be diagnosed by ultrasonography (US), with approximately 23 weeks of gestation. If there is suspicion of a lethal skeletal dysplasia CT with 3D reconstruction can be suggested. In the use of CT Multslice 3D for prenatal diagnosis of Thanatophoric Dysplasia, one should take into account the radiation dose. To reduce the radiation dose in the pregnant woman and her fetus, it is possible to employ a chain of smaller pipe without compromising the picture quality through automatic exposure control (AEC) which is based on the principle of CT Multslice. AEC Such systems are designed to adjust the tube current according to the patients shape, size, and attenuation of X-rays. One study compared the use of 2D-US and 3D-CT completion is lower cost and the absence of radiation in the US, the method is dependent on the volume of amniotic fluid and fetal position. The 3D-CT can demonstrate all fetal skeleton. The 2D US provided correct diagnosis in four of the six cases studied, while 3D-CT yielded the correct diagnosis in all six cases. (author)

  19. Evaluation of parapharyngeal space by computerized tomography and magnetic resonance. Part 1: anatomy; O valor da tomografia computadorizada e da ressonancia magnetica na avaliacao do espaco parafaringeo. Parte 1: anatomia

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    Souza, Ricardo Pires de; Rapoport, Abrao [Hospital Heliopolis, Sao Paulo, SP (Brazil)

    1994-01-01

    The authors, through a comprehensive review of the literature, intend to establish an anatomical concept of the parapharyngeal space and its surroundings spaces in the supra-hyoid neck, based on its division by the fascial planes. The correlation between the anatomically defined parapharyngeal space and the findings of the sectional imaging procedures (computed tomography and magnetic resonance) is established, evidencing clear anatomic-radiologic correspondence. (author) 44 refs., 2 figs.

  20. Seeking tools for image fusion between computed tomography, structural and functional magnetic resonance methods for applications in neurosurgery; Ferramentas para fusao de imagens dos metodos de tomografia computadorizada, ressonancia magnetica e ressonancia magnetica funcional para aplicacao pre-neurocirurgica

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    Rocha, Liana Guerra Sanches da, E-mail: liana@einstein.br [Departamento de Diagnostico por Imagem, Hospital Israelita Albert Einstein - HIAE, Sao Paulo (SP) (Brazil); Amaro Junior, Edson [Faculdade de Medicina, Universidade de Sao Paulo - USP, Sao Paulo, SP (Brazil). Deptartamento de Diagnostico por Imagem; Instituto do Cerebro - InCe, Hospital Israelita Albert Einstein - HIAE, Sao Paulo, SP (Brazil)

    2012-04-15

    To evaluate tools for the fusion of images generated by tomography and structural and functional magnetic resonance imaging. Methods: Magnetic resonance and functional magnetic resonance imaging were performed while a volunteer who had previously undergone cranial tomography performed motor and somatosensory tasks in a 3-Tesla scanner. Image data were analyzed with different programs, and the results were compared. Results: We constructed a flow chart of computational processes that allowed measurement of the spatial congruence between the methods. There was no single computational tool that contained the entire set of functions necessary to achieve the goal. Conclusion: The fusion of the images from the three methods proved to be feasible with the use of four free-access software programs (OsiriX, Register, MRIcro and FSL). Our results may serve as a basis for building software that will be useful as a virtual tool prior to neurosurgery. (author)

  1. Pneumocystis carinii pneumonia in acquired immunodeficiency syndrome - correlation of high-resolution computed tomography and anatomopathology; Pneumocistose na sindrome da imunodeficiencia adquirida: correlacao da tomografia computadorizada de alta resolucao com a anatomopatologia

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    Marchiori, Edson; Moreira, Luiza Beatriz [Universidade Federal Fluminense, Niteroi, RJ (Brazil). Dept. de Radiologia]. E-mail: edmarchiori@zipmail.com.br; Capone, Domenico [Universidade do Estado, Rio de Janeiro, RJ (Brazil). Faculdade de Medicina; Moraes, Heleno Pinto de [Universidade Federal Fluminense, Niteroi, RJ (Brazil). Dept. de Patologia; Pereira, Cyntia Inez Guedes Soares

    2001-12-01

    We present the main findings observed on the high-resolution computed tomography examinations of 15 patients with acquired immunodeficiency syndrome and Pneumocystis carinii pneumonia. The high-resolution computed tomography and autopsy findings of 5 patients were also compared. The most frequently observed high-resolution computed tomography patterns were ground-glass attenuation, consolidation areas, crazy-paving pattern and cysts. Nodules and intralobular reticulation were less frequently observed. Ground-glass attenuation and consolidation areas corresponded to alveolar filling with inflammatory exudate. Thickening of the interlobular septa was due to cell infiltration and edema. One patient presented interlobular reticulation, and the pathology study revealed alveolar septa thickening due to cell infiltration and fibrosis. Nodules observed in one of the patients corresponded to a patchy intra alveolar accumulation of microorganisms and inflammatory cells forming a 'granulomatous' pattern. (author)

  2. Avaliação morfológica e morfométrica da articulação umerorradioulnar em cães através de exames radiográficos e por tomografia computadorizada

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    Alessandra Sendyk-Grunkraut

    Full Text Available RESUMO: Este estudo teve como objetivo apresentar de forma detalhada dados morfológicos e morfométricos da articulação umerorradioulnar de cães de raça definida avaliados por meio de exames físicos, radiográficos e tomográficos. A amostra dessa pesquisa constituiu-se de 44 cotovelos de cães com idades variadas. Para análise de informações obtidas, o coeficiente kappa e de correlação interclasse e associação foram realizados. Constatou-se que o desempenho individual de cada projeção radiográfica teve pobre concordância com o exame tomográfico; não houve concordância entre os observadores para as mensurações do ângulo da incisura ulnar ao exame radiográfico e tomográfico. Porém houve boa/moderada concordância para mensuração da incongruência radioulnar no plano sagital entre os observadores. Concluiu-se que nenhuma das cinco incidências radiográficas foi superior para análise radiográfica, uma vez que cada projeção apresentou melhor identificação de um compartimento do cotovelo. Medidas ao exame tomográfico para incongruência radioulnar não apresentaram reprodutibilidade no plano de reconstrução frontal, entretanto no corte sagital apresentaram boa e moderada concordância entre os observadores e que a mensuração do ângulo da incisura ulnar não apresentou repetibilidade ao exame radiográfico e nem reprodutibilidade ao exame tomográfico. Esses resultados contribuem para melhor utilização de cada exame de acordo com a região a ser avaliada bem como ressaltam a necessidade da somatória de múltiplos exames de imagem para a correta avaliação desta afecção.

  3. Incidental paranasal sinuses abnormalities in pediatric patients using computed tomography of the head and orbits; Alteracoes incidentais dos seios da face na tomografia computadorizada do cranio e orbitas em criancas

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    Araujo Neto, Severino Aires de [Universidade Estadual de Campinas, SP (Brazil). Centro de Assistencia Integral a Saude da Mulher (CAISM)]. E-mail: severinoaires@hotmail.com; Souza, Antonio Soares [Faculdade de Medicina de Sao Jose do Rio Preto (FAMERP), SP (Brazil). Hospital de Base. Servico de Radiologia; Pereira, Ines Minniti Rodrigues [Universidade Estadual de Campinas, SP (Brazil). Faculdade de Ciencias Medicas. Dept. de Radiologia; Baracat, Emilio Carlos Elias [Universidade Estadual de Campinas, SP (Brazil). Faculdade de Ciencias Medicas. Dept. de Pediatria

    2005-07-15

    Objective: To evaluate the prevalence and appearance of incidental paranasal sinuses abnormalities in children with no clinical evidence of rhino sinusitis using CT scans. Materials and methods: CT scans of the head or orbits of children between 0 and 18 years of age performed due to problems not related to rhino sinusitis were studied. Results: Sixty-four children were included (mean age 5.7 years; standard deviation = 3.9). Incidental sinuses abnormalities were found in 46 cases (72%). In most cases the abnormalities were mild (25/46) and mucosal thickening was the most common finding. Complete opacification and fluid levels occurred in 12 children. More than one cavity was affected in 33 patients and abnormalities were most frequently seen in maxillary sinuses, followed by ethmoid sinuses. Bilateral and symmetric findings were common. The prevalence and intensity of abnormalities were higher in children below three years of age. Conclusion: Incidental abnormalities are highly prevalent and tend to be mild in children without symptoms of rhino sinusitis. The most prevalent abnormality was mucosal thickening. Moderate and severe abnormalities occur in children below three years of age. (author)

  4. Computed tomography in the analysis of calcification patterns in pediatric bone tumors of the hip: a new approach; Tomografia computadorizada na analise dos padroes de calcificacoes nos tumores osseos da bacia em pediatria: nova abordagem

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    Oliveira, Gabriel Antonio de; Werlang, Henrique Zambenedetti; Bergoli, Pedro Martins [Hospital Universitario Cassiano Antonio de Morais/Hospital Infantil Nossa Senhora da Gloria, Vitoria, ES (Brazil). Centro de Diagnostico por Imagem]. E-mail: hzwerlang@gmail.com; Frechiani, Madalena; Oliveira, Fernao [Hospital Infantil Nossa Senhora da Gloria, Vitoria, ES (Brazil)

    2006-11-15

    Objective: In the pediatric group, the radiological diagnosis of bone tumors of the hip is difficult and presents some peculiarities, but reviewed literature does not approach this specific problem. The objective of the present study was to investigate the existence of reliable radiological patterns for the differential diagnosis of these tumors. Materials And Methods: Radiological findings of bone tumors of the hip in ten patients in the age range between 8 and 19 years have been reviewed. Results: Bone reaction (sclerosis or lysis), periosteal reaction (lamellar with single or multiple layers, or radial), tumor extent in the bone and level of soft tissues invasion have presented low specificity. Soft tissue calcifications, when considered as a whole, were non-specific. However, when those calcifications with varied shapes and sizes, nearby the affected bone (pattern I) were separated from those, thin and amorphous, away from the bone (pattern II), we have observed that the pattern I was totally non-specific, and the pattern II was found in the three cases of osteosarcoma (100%) and in only one case of Ewing's sarcoma (16.6%). Conclusion: In the present study, pattern II calcifications have shown a 100% sensitivity and 90% specificity for osteosarcoma. However, their importance may be not limited to the radiological diagnosis. Pattern II calcifications indicate probably ideal sites for biopsy. (author)

  5. Study of dosimetric quantities applied to patient undergoing routine chest examinations by computed tomography; Estudo de grandezas dosimetricas aplicadas em pacientes submetidos a exames de torax rotina em tomografia computadorizada

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    Gonzaga, Natalia Barbosa

    2012-07-01

    The radiological protection system has established a standard to protect persons against the harmful effects caused by ionizing radiation that is based on the justification, optimization and dose limitation principles. The increasing use of radiation in medicine and the related risks have stressed the discussion on patient radiation protection. The computed tomography (CT) is the diagnostic radiology technique that most contributes to patient doses and it requires optimization efforts. Diagnostic reference levels (DRL) has been established in many countries in terms of CT dosimetric quantities; in Brazil, the DRLs are still under investigation since the culture of patient protection is not very strong yet. The objective of this work was to investigate the dosimetric and protection quantities related to patients undergoing CT routine chest examinations. The ImPACT CT, CT Expo and ImpactDose softwares were used for calculations of the weight and volumetric air-kerma indexes (CW and CVOL), the air kerma - length product (P{sub K,L}), organ equivalent dose (H{sub T}) and the effective dose (E) for CT routine chest protocols in 19 tomographs in Belo Horizonte city. The CT Expo was selected to be validated against experimental measurements in three hospitals with thermoluminescent dosimeters and CT pencil ionization chamber in anthropomorphic and standard CT body phantoms. Experimental and calculated results indicated differences up to 97% for H{sub T} and E and acceptable agreement for C{sub W} ,C{sub VOL} and P{sub K,L}. All data from 19 tomographs showed that local DRLs for CT routine chest examinations may be chosen smaller than DRLs adopted in other countries; this would contribute to increase the radiological protection of patients. (author)

  6. Study of dosimetric quantities and image quality in pediatric examinations of chest and abdomen computed tomography; Estudo das grandezas dosimetricas e da qualidade da imagem em exames pediatricos de torax e abdomen por tomografia computadorizada

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    Jornada, Tiago da Silva

    2013-08-01

    This work had the objective to achieve the knowledge of the dosimetric quantities related to chest and abdomen computed tomography (CT) examinations of pediatric patients, in Belo Horizonte city. The reason of this work is based on the fact that the probability of health detriment in children, which it may be caused by radiation, is higher than in adults. Besides, although in many countries the knowledge and control of patient doses is a normal procedure, this safety culture does not exist in Brazil. Another objective of this work was to compare the dosimetric quantity values with the Diagnostic Reference Levels (DRLs); when it was needed, an optimization process was applied and the quality of the diagnostic image obtained with the optimized technical parameters was analyzed. This study was carried out in five hospitals, where the weighted air kerma index (Cw), the volumetric air kerma index (Cvol), the air kerma - length product (PKL,CT), the Effective Dose (E) and the Normalized Effective Dose (En) were determined; three methods were adopted for measurements: the ionization chamber inside a chest pediatric phantom, radiochromic films and the CT-EXPO software. The optimization process was applied to a single hospital through variations in the current (mA) and voltage (kV) of the x-ray tube for the protocols used for abdomen CT examinations. The analysis of the quality of the diagnostic image was done by Normal Distribution and ROC analysis; spatial resolution analysis was used through MTF determination and the noise level was judged in terms quantitative and qualitative. Results of the dosimetric quantities showed that they significantly differed between single-slice and multi-slice tomography units, but their values were always below the recommended DRLs. The optimized values of the dosimetric quantities obtained after the optimization process showed that it was possible to reduce the radiation exposure of pediatric patient without losing the image quality, despite the low dose values found. Dose values very lower than DRLs might induce to an unjustified practice of increasing the dose for improving the image diagnostic quality; the results showed that if it was done there was not a relevant change in the quality. Based on the results of this work, it was possible to state that the dosimetric quantity values in the studied pediatric tomographic procedures were lower than DRLs, but there was still room of optimization for patient protection and to maintain an adequate image diagnostic quality in computed tomography. (author)

  7. Evaluation of peak voltage, irradiation time, output and half value layer in computed tomography equipment;Avaliacao da tensao de pico, tempo de irradiacao, rendimento e camada semi-redutora em equipamentos de tomografia computadorizada

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    Nersissian, Denise Y.; Santos, Lucas R. dos; Saito, Ricardo H. [Universidade de Sao Paulo (IEE/USP), SP (Brazil). Inst. de Eletrotecnica e Energia; Silva, Marcia C. [Hospital Albert Einstein (HAE), Sao Paulo, SP (Brazil)

    2009-07-01

    In this work, the voltage peak, the irradiation time, output and half value layer were evaluated in two multislice computed tomography equipment. These evaluations are commonly done in conventional, fluoroscopic and mammographic equipment, but not in computed tomography. The results have depicted that accuracy and reproducibility meet the 10% limit established by Portaria SVS MS 453/1998 and by Guia de Radiodiagnostico - RE 1016/2005. The half value layer is between (6.55 +- 0.31) mmAl and (7.70 +- 0.39) mmAl for 120 kVp on three bow tie filter positions. The output obtained for the isocenter position was 0.097, 0.158, 0.227 and 0.286 mGy/mAs for 80, 100, 120 e 135 kVp, respectively; being similar between two tomography equipment. Such evaluations have only been possible due to the intervention on the CT equipment, stopping the rotation of the X-ray tube inside the gantry. (author)

  8. Evaluation of a new pencil-type ionization chamber for dosimetry in computerized tomography beams; Avaliacao de uma nova camara de ionizacao tipo lapis para dosimetria em feixes de tomografia computadorizada

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    Castro, Maysa C. de; Neves, Lucio P.; Silva, Natalia F. da; Santos, William de S.; Caldas, Linda V.E., E-mail: maysadecastro@gmail.com, E-mail: lpneves@ipen.br, E-mail: na.fiorini@gmail.com, E-mail: wssantos@ipen.br, E-mail: lcaldas@ipen.br [Instituto de Pesquisas Energeticas e Nucleares (IPEN/CNEN-SP), Sao Paulo, SP (Brazil)

    2014-07-01

    For performing dosimetry in computed tomography beams (CT), use is made of a pencil-type ionization chamber, since this has a uniform response to this type of beam. The common commercial chambers in Brazil have a sensitive volume length of 10 cm. Several studies of prototypes of this type of ionization chamber have been conducted, using different materials and geometric configurations, in the Calibration Laboratory Instruments of the Institute of Nuclear and Energy Research (LCI) and these showed results within internationally acceptable limits. These ion chambers of 10 cm are widely used nowadays, however studies have revealed that they have underestimated the dose values. In order to solve this problem, we developed a chamber with sensitive volume length of 30 cm. As these are not yet very common and no study has yet been performed on LCI conditions on their behavior, is important that the characteristics of these dosemeters are known, and the influence of its various components. For your review, we will use the Monte Carlo code Penelope, freely distributed by the IAEA. This method has revealed results consistent with other codes. The results for this new prototype can be used in dosimetry of the CT of the hospitals and calibration laboratories as the LCI.

  9. Bioelectrical impedance and visceral fat: a comparison with computed tomography in adults and elderly; Bioimpedancia eletrica e gordura visceral: uma comparacao com a tomografia computadorizada em adultos e idosos

    Energy Technology Data Exchange (ETDEWEB)

    Eickemberg, Michaela [Universidade Federal da Bahia (UFBA), Salvador, BA (Brazil); Roriz, Anna Karla Carneiro [Universidade Federal da Bahia (UFBA), Salvador, BA (Brazil); Fontes, Gardenia Abreu Vieira [Universidade Federal da Bahia (UFBA), Salvador, BA (Brazil); Sampaio, Lilian Ramos [Universidade Federal de Sao Paulo (Unifesp), Sao Paulo, SP (Brazil)

    2013-05-01

    Objective: To evaluate the association between electrical bioimpedance analysis (BIA) and visceral fat (VF) in adult and elderly patients. Subjects and methods: This was a cross-sectional study, with a sample of 191 subjects (52% women, 49% elderly) stratified by sex, age and body mass. Computerized tomography (VF area) and BIA (percentage of total body fat (%TBF-BIA), phase angle, reactance and resistance) data were generated. Statistical analysis was based on Pearson's Correlation Coefficient, Anova, Pearson's Chi-square, and ROC curves. Results: VF areas {>=} 130 cm{sup 2} were more prevalent among the elderly and among men. Adult females showed a stronger correlation between GV and %TBF-BIA. The other groups showed similar results and statistically significant correlations. Correlations between GV and phase angle were weak and not statistically significant. ROC Curves analyzes showed the following %TBF-BIA, which identified excess VF: for male subjects: 21.5% (adults) and 24.25% (elderly); for female subjects: 35.05% (adults) and 38.45% (elderly) with sensitivity of 78.6%, 82.1%, 83.3%, and 66.7%, and specificity of 70.6%, 62.5%, 79.1%, and 69%, respectively. Conclusion: BIA was found to have satisfactory sensitivity and specificity to predict VF; however, other devices and other techniques should be investigated to improve VF prediction. (author)

  10. New methodology for analysis of diverting agent performance in unconsolidated sandstones with physical simulator using computerized tomography; Nova metodologia para analise de desempenho de agentes divergentes em arenitos inconsolidados com simuladores fsicos utilizando tomografia computadorizada

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    Ribeiro, Joao Luiz Batista [Universidade Federal do Rio de Janeiro (UFRJ), RJ (Brazil). Fundacao COPPETEC. Lab. de Instrumentacao Nuclear], e-mail: jlbr.coppetec@petrobras.com.br; Queiroz Neto, Joao Crisosthomo de; D' Almeida, Arnaldo Rodrigues; Souza, Lenita Rangel de [PETROBRAS, Rio de Janeiro, RJ (Brazil). Centro de Pesquisas da Petrobras (CENPES). Gerencia de Tecnologia e Engenharia de Pocos], e-mail: joaoqueiroz@petrobras.com.br; e-mail: arda@petrobras.com.br; e-mail: lenita@petrobras.com.br; Bianco, Luis Carlos Baralho [PETROBRAS, Rio de Janeiro, RJ (Brazil). Unidade de Negocio de Exploracao e Producao do Rio de Janeiro. Gerencia de Engenharia de Pocos], e-mail: lbianco@petrobras.com.br; Campo, Elisabete Ferreira [PETROBRAS, Rio de Janeiro, RJ (Brazil). Centro de Pesquisas da Petrobras (CENPES). Gerencia de Tecnologia de Recuperacao e Analise de Reservatorios], e-mail: betefc@petrobras.com.br

    2006-12-15

    While oil and gas producer wells have the advantage of being able to naturally expel damaging particles produced during the drilling and/or completion phase, water injectors are prone to accumulating damaging substances during their operation . In order to remove those substances and restore the potential injectivity of these wells, acid jobs are usually required. One of the major challenges of these operations is to achieve successful treatment diversion. If the interval consists of layers with different permeabilities, the acid will preferably penetrate high permeable layers, leaving the zones of minor permeability without treatment. For diversion to occur, a highly effective material quantity and concentration needs to be applied. The diverting agent must also be non-damaging, low-cost and easy-to-use. The diverting agent studied performed well for permeabilities up to 3 Darcy. The main advantage of the product, besides its high divergence capacity, is the specific action of forming channels in the pores of the matrix where only oil can flow. Therefore, due to it's high hygroscopic characteristics, captures the water around the pores. Also , the product is capable of self-removal after treatment, with the oil produced in the treated well, which eliminates the need for subsequent treatments that would increase time and cost of the operation. In this study, an X-Ray Computerized Tomography (CT) scanner was used to evaluate in real-time the performance of the diverting agent in rock-fluid interactions. A special aluminum cell (physical simulator) was designed to simulate as closely as possible the conditions found in a real oil well. These conditions include, for example, pressure, temperature, fluid pressure injection, permeability, porosity and oil and water saturations of the studied reservoir. A sequence of tests that were performed in different unconsolidated sandstones, which simulated Campos Basin deep water fields, confirmed the system's efficiency, effectiveness and diverting effect. (author)

  11. Computed tomography findings in Meckel's diverticulitis: a case report and review of the literature; Papel da tomografia computadorizada no diagnostico da diverticulite de Meckel: relato de caso e revisao de literatura

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    Hochhegger, Bruno [Complexo Hospitalar Santa Casa de Porto Alegre, RS (Brazil); Haygert, Carlos Jesus Pereira; Antunes, Paulo Sergio Pase [Hospital Universitario de Santa Maria, RS (Brazil); Belletti, Roberta; Berni, Renata Brutti; Gabbi, Maria Cecilia D.; Reis, Daniela Quinto dos [Universidade Federal de Santa Maria (UFSM), RS (Brazil); Andrade, Rubens Gabriel Feijo [Fundacao Universitaria de Cardiologia de Porto Alegre, RS (Brazil). Inst. de Radiologia; Gazzoni, Fernando [Pontificia Universidade Catolica de Porto Alegre (PUC-RS), Porto Alegre, RS (Brazil). Hospital Sao Lucas; Menegon, Aline K. [Universidade Federal de Pelotas (UFPel), RS (Brazil). Faculdade de Medicina; Lopes, Luis Felipe Dias [Universidade Federal de Santa Maria (UFSM), RS (Brazil). Dept. de Estatistica]. E-mail: brunorgs@pop.com.br

    2007-07-01

    The Meckel's diverticulum is the result of an incomplete atrophy of the omphalomesenteric duct. It is the most prevalent congenital anomaly of the gastrointestinal tract, affecting from 0.3% to 3% of the general population. The occurrence of ectopic gastric and pancreatic tissue is frequent. Diverticulitis occurs in 20% of the patients with Meckel's diverticulum. We reported a case of Meckel's diverticulitis, with ectopic gastric tissue inside and reviewed the computed tomography findings. (author)

  12. Halo sign nodules in angio invasive pulmonary aspergillosis: correlation of high-resolution computed tomography findings with anatomopathology; Nodulos com sinal do halo na aspergilose pulmonar angioinvasiva: correlacao da tomografia computadorizada de alta resolucao com a anatomopatologia

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    Marchiori, Edson [Universidade Federal Fluminense, Niteroi, RJ (Brazil). Dept. de Radiologia; Valiante, Paulo Marcos [Universidade Federal, Rio de Janeiro, RJ (Brazil). Dept. de Patologia; Souza Junior, Arthur Soares [Faculdade de Medicina de Sao Jose do Rio Preto (FAMERP), SP (Brazil). Disciplina de Radiologia

    2002-08-01

    The aim of this study was to correlate the early findings observed on high-resolution computed tomography with anatomopathology results of patients with angio invasive aspergillosis. The authors studied two patients with leukemia. The nodules seen on high-resolution computed tomography corresponded to areas of hemorrhagic infarction, necrotic coagulation and fungal hyphae infiltration whereas ground glass halo corresponded to intra alveolar hemorrhage. Nodules with halo sign were closely correlated with anatomopathology findings. We concluded that the anatomopathology findings can clearly explain the image features of the lesions observed on high-resolution computed tomography. (author)

  13. Computed tomography and magnetic resonance imaging findings of os styloideum in a symptomatic athlete;Achados de imagem por tomografia computadorizada e ressonancia magnetica do os styloideum em atleta sintomatico

    Energy Technology Data Exchange (ETDEWEB)

    Gomes, Andre Francisco; Paganella, Vinicius Chissini, E-mail: andregomes2006@uol.com.b [Diagnostico Avancado por Imagem (DAPI), Curitiba, PR (Brazil); Paganella, Mateus Chissini; Henkin, Caroline Schwartz [Pontificia Universidade Catolica do Rio Grande do Sul (PUC-RS), Porto Alegre, RS (Brazil); Giostri, Giana [Hospital Universitario Cajuru, Curitiba, PR (Brazil). Group of Hand Surgery

    2010-05-15

    Os styloideum is an accessory ossicle located dorsally on the wrist that represents an anatomic variant. Association between the os styloideum and wrist pain is clinically known as 'carpal boss syndrome'. The authors report a case of bone marrow edema in the os styloideum diagnosed by magnetic resonance imaging in a young tennis player, and present a literature review on this finding. (author)

  14. Correlação entre a escala de coma de Glasgow e os achados de imagem de tomografia computadorizada em pacientes vítimas de traumatismo cranioencefálico

    OpenAIRE

    Fabiana Lenharo Morgado; Luiz Antônio Rossi

    2011-01-01

    OBJETIVO: Determinar a correlação da escala de coma de Glasgow, fatores causais e de risco, idade, sexo e intubação orotraqueal com os achados tomográficos em pacientes com traumatismo cranioencefálico. MATERIAIS E MÉTODOS: Foi realizado estudo transversal prospectivo de 102 pacientes, atendidos nas primeiras 12 horas, os quais receberam pontuação segundo a escala de coma de Glasgow e foram submetidos a exame tomográfico. RESULTADOS: A idade média dos pacientes foi de 37,77 ± 18,69 anos, com ...

  15. Correlação entre a escala de coma de Glasgow e os achados de imagem de tomografia computadorizada em pacientes vítimas de traumatismo cranioencefálico

    Directory of Open Access Journals (Sweden)

    Fabiana Lenharo Morgado

    2011-02-01

    Full Text Available OBJETIVO: Determinar a correlação da escala de coma de Glasgow, fatores causais e de risco, idade, sexo e intubação orotraqueal com os achados tomográficos em pacientes com traumatismo cranioencefálico. MATERIAIS E MÉTODOS: Foi realizado estudo transversal prospectivo de 102 pacientes, atendidos nas primeiras 12 horas, os quais receberam pontuação segundo a escala de coma de Glasgow e foram submetidos a exame tomográfico. RESULTADOS: A idade média dos pacientes foi de 37,77 ± 18,69 anos, com predomínio do sexo masculino (80,4%. As causas foram: acidente automobilístico (52,9%, queda de outro nível (20,6%, atropelamento (10,8%, queda ao solo ou do mesmo nível (7,8% e agressão (6,9%. No presente estudo, 82,4% dos pacientes apresentaram traumatismo cranioencefálico de classificação leve, 2,0% moderado e 15,6% grave. Foram observadas alterações tomográficas (hematoma subgaleal, fraturas ósseas da calota craniana, hemorragia subaracnoidea, contusão cerebral, coleção sanguínea extra-axial, edema cerebral difuso em 79,42% dos pacientes. Os achados tomográficos de trauma craniano grave ocorreram em maior número em pacientes acima de 50 anos (93,7%, e neste grupo todos necessitaram de intubação orotraqueal. CONCLUSÃO: Houve significância estatística entre a escala de coma de Glasgow, idade acima de 50 anos (p < 0,0001, necessidade de intubação orotraqueal (p < 0,0001 e os achados tomográficos.

  16. Estudo comparativo do tono muscular na paralisia cerebral tetraparética em crianças com lesões predominantemente corticais ou subcorticais na tomografia computadorizada de crânio

    OpenAIRE

    2003-01-01

    OBJETIVO: Comparar a distribuição e intensidade do tono muscular na paralisia cerebral tetraparética espástica (PC-T), correlacionando os dados clínicos com a localização da lesão no sistema nervoso central. MÉTODO: Foram incluídas 12 crianças de dois a quatro anos de idade com lesões predominantemente corticais (seis crianças) e subcorticais (seis crianças). O tono foi analisado nos membros superiores (MMSS) e inferiores (MMII) baseado no protocolo de Durigon e Piemonte. RESULTADOS: Não houv...

  17. Proposal of recommendations for quality control in computerized tomography, with emphasis in new technologies; Proposta de um protocolo de controle de qualidade em tomografia computadorizada, com enfase nas novas tecnologias

    Energy Technology Data Exchange (ETDEWEB)

    Rodrigues, Marlon da Silva Brandao; Neves, Camila Nascimento das

    2016-11-01

    The use of computed tomography (CT) has continuously grown over the years and expanding its applications in different medical procedures. As a result, there was an increase of frequency and in collective dose. One of the strategies to maximize the benefits of this important imaging modality is the implementation of optimization of protection programs. As part of this process, a quality control should be established to ensure the correct performance of the scanner. Quality control protocols can be very useful to carry out all tests in a standard methodology and well-established tolerance values. However, to keep up with the constant advances in technology, these protocols must be constantly reviewed and updated to allow its application in different existing models. The objective of this work is to develop a quality control protocol based on international recommendations and in national standards. (author)

  18. Computed tomography evaluation with the use of automatic current modulator: possibilities and limitations; Avaliacao de imagens de tomografia computadorizada com o uso do modulador automatico de corrente: potencialidades e limitacoes

    Energy Technology Data Exchange (ETDEWEB)

    Souza, Giordana Salvi de; Real, Jessica Villa; Froner, Ana Paula Pastre; Silva, Ana Maria Marques da, E-mail: giordana.souza@acad.pucrs.br [Pontificia Universidade Catolica do Rio Grande do Sul (PUC-RS), Porto Alegre, RS (Brazil)

    2015-08-15

    The technology available in most modern equipment CT enables the automatic tube current modulation, according to the thickness variation of the anatomical region studied. This study aimed to evaluate the quantitative parameters related to the image quality produced by CT scanner, with and without the use of the manufacturer's dose modulation system. For this, Catphan 700 phantom was used, and images were acquired in a Philips scanner, with and without the use of current modulation, using a protocol adult skull. The results showed an increase of 20.8% of the CTDI{sub vol} and DLP with the use of the current modulator in relation to the images acquired with the same protocol without the modulator. It was observed that the image noise using the modulator had the lowest value, as well as higher spatial resolution due to the higher dose provided by the current modulation system. There were no significant differences in the uniformity and accuracy of CT number and even in linearity. Concluding, the dose optimization process using simulators should be carefully evaluated because it depends on the settings for each current modulation system assumed by the manufacturer. Although they supposedly seek the dose optimization, such systems can produce a considerable increase in dose, without significantly modifying the image quality for certain protocols. (author)

  19. Doença cística medular do rim: relato de um caso diagnosticado por ultra-sonografia e tomografia computadorizada Medullary cystic disease of the kidney: report of a case diagnosed by ultrasonography and computed tomography examinations

    OpenAIRE

    Tarcísio Nunes Carvalho; Cyrillo Rodrigues de Araújo Jr.; Sérgio Roberto Fraguas Filho; Marlos Augusto Bittencourt Costa; Flávia Aparecida de Souza Ribeiro; Kim-Ir-Sen Santos Teixeira

    2003-01-01

    Doença cística medular, nefronofitíase juvenil familiar ou complexo de doença cística medular referem-se a um grupo de doenças similares cuja lesão básica é uma progressiva atrofia tubular renal com esclerose glomerular e formação cística medular. É importante causa de insuficiência renal em pacientes adolescentes. Estudos de imagem têm papel principal no diagnóstico desta enfermidade, com cistos caracteristicamente individualizados na medula renal e junção córtico-medular e tamanho renal nor...

  20. Study of a methodology for the quality control and radioprotection program in computerized tomography; Estudo de uma metodologia para programa de controle da qualidade e radioprotecao em tomografia computadorizada

    Energy Technology Data Exchange (ETDEWEB)

    Tiecher, Maria Ester Souza

    1998-09-01

    The objective of this work is to develop a methodology for the quality control program computerized tomography (CT) sector at the Hospital Central do Exercito (HCE). The methodology was developed based on the study of physical parameters related to the equipment efficiency and the radiation dose, Computed Tomography Dose Index. The study established a set of tests necessary to determine the following physical parameters: spatial resolution, resolution of low contrast, linearity, uniformity of CT number, noise, slice thickness and artefacts. In order to evaluate the influence of the variables at the different parameters it was made some changes at the Standard routine service for the case Head and Abdomen. In sight of an optimization, the parameter study correlated the following variables; tube current, scanning time, image reconstruction filter and slice thickness. The equipment used for the analysis was a pencil-shaped ionization chamber. This kind of dosimeter is widely used for quality control programs mainly due its easy handily and the ready results, for a phantom of the human body. As a result of the work, it has been provided an Instruction Handbook, based on the equipment handbook, including a list of physical parameters to be controlled and that improves the quality control in the Radiological Department of the Hospital Central do Exercito. (author) 35 refs., 55 figs., 65tabs.

  1. Correlação entre a escala de coma de Glasgow e os achados de imagem de tomografia computadorizada em pacientes vítimas de traumatismo cranioencefálico

    OpenAIRE

    Fabiana Lenharo Morgado; Luiz Antônio Rossi

    2011-01-01

    OBJETIVO: Determinar a correlação da escala de coma de Glasgow, fatores causais e de risco, idade, sexo e intubação orotraqueal com os achados tomográficos em pacientes com traumatismo cranioencefálico. MATERIAIS E MÉTODOS: Foi realizado estudo transversal prospectivo de 102 pacientes, atendidos nas primeiras 12 horas, os quais receberam pontuação segundo a escala de coma de Glasgow e foram submetidos a exame tomográfico. RESULTADOS: A idade média dos pacientes foi de 37,77 ± 18,69 anos, com ...

  2. Estudo comparativo do tono muscular na paralisia cerebral tetraparética em crianças com lesões predominantemente corticais ou subcorticais na tomografia computadorizada de crânio

    Directory of Open Access Journals (Sweden)

    Iwabe Cristina

    2003-01-01

    Full Text Available OBJETIVO: Comparar a distribuição e intensidade do tono muscular na paralisia cerebral tetraparética espástica (PC-T, correlacionando os dados clínicos com a localização da lesão no sistema nervoso central. MÉTODO: Foram incluídas 12 crianças de dois a quatro anos de idade com lesões predominantemente corticais (seis crianças e subcorticais (seis crianças. O tono foi analisado nos membros superiores (MMSS e inferiores (MMII baseado no protocolo de Durigon e Piemonte. RESULTADOS: Não houve diferença significante quanto à intensidade e distribuição de tono em MMSS e MMII nos dois grupos. Comparando os MMSS e MMII de sujeitos do mesmo grupo, os MMII apresentaram mais assimetrias e maior intensidade do tono do que os MMSS. CONCLUSÃO: Neste estudo, crianças com PC devido a lesões predominantemente corticais ou subcorticais apresentam déficit semelhante na modulação de tono, ocasionando distribuição simétrica e homogênea de hipertonia que predomina em MMII.

  3. Manifestations of infection by the novel influenza A (H1N1) virus at chest computed tomography; Manifestacoes da infeccao pelo novo virus influenza A (H1N1) na tomografia computadorizada de torax

    Energy Technology Data Exchange (ETDEWEB)

    Verrastro, Carlos Gustavo Yuji; D' Ippolito, Giuseppe [Universidade Federal de Sao Paulo (UNIFESP/EPM), Sao Paulo, SP (Brazil). Dept. de Diagnostico por Imagem], e-mail: giuseppe_dr@uol.com.br; Abreu Junior, Luiz de; Hitomi, Diego Ziotti; Antonio, Emerson Pelarigo [Hospital e Maternidade Sao Luiz, Sao Paulo, SP (Brazil). Servico de Diagnostico por Imagem; Neves, Rodrigo Azambuja [Hospital do Rim e Hipertensao, Sao Paulo, SP (Brazil)

    2009-11-15

    Objective: the objective of this study was to describe chest computed tomography findings in confirmed cases of infection by the novel influenza A (H1N1) virus. Materials and methods: computed tomography studies of nine patients with laboratory-confirmed infection by the novel influenza A (H1N1) virus were consensually evaluated by three observers. The sample of the present study included five male and four female patients with ages ranging from 14 to 64 years (mean, 40 years). Four of the patients were previously healthy, four were kidney transplant recipients and one was pregnant at the time of diagnosis. Presence, extent and distribution of the following findings were evaluated: ground-glass opacities; centrilobular nodules; consolidation; interlobular septa thickening; pleural effusion; lymphadenopathy. Results: The most frequent findings were ground-glass opacities, centrilobular nodules and consolidations, present in nine (100%), five (55%) and four (44%) of cases, respectively. Pleural effusions and lymphadenopathy were less common findings, occurring in only two (22%) of the cases. Conclusion: ground-glass opacities, centrilobular nodules and consolidation were the most frequent findings in cases of infection by the novel influenza A (H1N1) virus. These changes are not typical or unique to this agent and may also occur in other viral or bacterial infections. (author)

  4. Image quality and volume computed tomography air kerma index (C{sub vol}) evaluation in Recife; Avaliacao da qualidade de imagem e do indice volumetrico de Kerma ar em tomografia computadorizada (C{sub vol}) em Recife

    Energy Technology Data Exchange (ETDEWEB)

    Andrade, Marcos Ely Almeida

    2008-07-01

    The Computed Tomography (CT) is an important diagnostic imaging method, widely used. However, in spite of all the advantages and technologic advances within the CT scanners, the tomographic procedures result in high absorbed doses to patients. The main objective of this work was to perform a dosimetric study of CT scanners located at Recife and to evaluate the image quality on CT examinations in these equipment. The volume CT air kerma index (C{sub VOL}) and air kerma length product (P{sub KL,CT}) were estimated. These values were calculated using normalized weighted air kerma indexes in CT standard dosimetry phantoms ({sub n}C{sub W}), supplied by ImPACT group for several CT scanners, and the scan parameters of routine head, routine chest and hi-resolution chest CT exams performed at 20 institutions. The irradiation parameters of 15 adult patients for each CT procedure were registered at six participating centres, at which the phantom from the American College of Radiology (ACR) CT accreditation protocol was used for the image quality measurements. For routine head exams, the C{sub VOL} values varied between 12 and 58 mGy (at the posterior fossa) and 15 to 58 mGy (at the cerebrum) and the P{sub KL,CT}, from 150 to 750 mGy{center_dot}cm. The C{sub VOL} values for routine chest procedures varied from 3 to 26 mGy and the P{sub KL,CT}, between 120 and 460 mGy{center_dot}cm. In relation to Hi-resolution chest exams, C{sub VOL} values were from 1.0 to 2.7 mGy and the P{sub KL,CT} values varied between 24 and 67 mGy{center_dot}cm. The image quality evaluations results showed that almost all scanners presented at least one inadequacy. One of the equipment presented faults at 70% of the tests. With regard to the image noise, only two scanners presented acceptable results. From these results, it is possible to conclude that the volume CT air kerma index values are lower than the European reference levels. However, the image quality of these CT scanners does not attend the ACR requirements, suggesting the need to implement quality assurance programs at the evaluated institutions. (author)

  5. Preliminary evaluation of exposures of computerized tomography patients in Latin America: IAEA project RLA/9/67; Avaliacao preliminar das exposicoes de pacientes em tomografia computadorizada na America Latina: Projeto IAEA RLA/9/67

    Energy Technology Data Exchange (ETDEWEB)

    Kodlulovich, S.; Silveira, V. [Comissao Nacional de Energia Nuclear (CNEN), Rio de Janeiro, RJ (Brazil); Khoury, H.J. [Universidade Federal de Pernambuco (UFPE), Recife, PE (Brazil). Departamcnto de Energia Nuclear; and others

    2013-07-01

    The aim of this study was to obtain preliminary values of reference levels in CT . Were sent to each country forms with information of radiological protection and routine CT protocols. The CT dose index and absorbed dose to organs was estimated from the technical data for each equipment . The results showed that the total number of examinations performed 92 % are adult patients and 8 % are children. The most frequent examination of the skull was adult (40 % ) and abdomen for children (42 % ) . About the service , 67 % of the equipment are multicut and 76 % have specific protocols for pediatric patients. The CTDI{sub vol} values for head exams of adults vary between 2 and 352 mGy for pediatric patients under 1 year 1-191 mGy under 7 years old 5-335 mGy. For chest values ranged from 3 to 26 mGy for adults, between 1 and 89 mGy for children under 1 year and between 3-114 mGy for children between 1 and 7 years. Exams of the abdomen/pelvis of adults the range was 3-47 mGy , between 4-90 mGy for children under 1 year and between 2-31 mGy for children between 1 and 7 years. This study showed that although there are pediatric protocols, there is a wide variation in values of CTDl{sub vol} indicating a high potential for dose reduction. This result requires immediate action for optimization and implementation of diagnostic reference values in Latin America.

  6. High-resolution computed tomography findings in pulmonary complications after bone marrow transplantation: iconographic essay; Tomografia computadorizada de alta resolucao nas complicacoes pulmonares pos-transplante de medula ossea: ensaio iconografico

    Energy Technology Data Exchange (ETDEWEB)

    Gasparetto, Emerson L.; Ono, Sergio E.; Souza, Carolina A. [Parana Univ., Curitiba, PR (Brazil). Hospital de Clinicas. Servico de Radiologia Medica e Diagnostico por Imagem]. E-mail: gasparetto@hotmail.com; Escuissato, Dante L. [Parana Univ., Curitiba, PR (Brazil). Faculdade de Medicina. Disciplina de Radiologia Medica; Rocha, Gabriela de Melo; Inoue, Cezar; Falavigna, Joao M. [Parana Univ., Curitiba, PR (Brazil). Faculdade de Medicina; Marchiori, Edson [Universidade Federal Fluminense (UFF), Niteroi, RJ (Brazil). Faculdade de Medicina. Dept. de Radiologia; Universidade Federal, Rio de Janeiro (UFRJ), RJ (Brazil). Curso de Pos-graduacao em Radiologia

    2005-12-01

    Bone marrow transplantation has been the treatment of choice for many hematologic diseases. However, pulmonary complications, which may occur in up to 60% of the patients, are the main cause of treatment failure and may be divided in three phases according to the patient's immunity. In the first phase, up to 30 days after the procedure, there is a predominance of non-infectious complications and fungal pneumonia. Viral infections, mainly by cytomegalovirus, are common in the second phase (up to 100 days after bone marrow transplantation). Finally, in the late phase after bone marrow transplantation, non-infectious complications as bronchiolitis obliterans organizing pneumonia and graft-versus-host disease are most commonly seen. The authors present a pictorial essay of the high-resolution computed tomography findings in patients with pulmonary complications after bone marrow transplantation. (author)

  7. Computed tomography findings in closed obstruction of the small bowel associated with rupture of the cecum - a case report; Obstrucao em alca fechada com ruptura do ceco: aspectos na tomografia computadorizada - relato de um caso

    Energy Technology Data Exchange (ETDEWEB)

    Crespo, Sheila Jandhyra Vianna; Mendes, Luis Fernando [Instituto Nacional do Cancer (INCa), Rio de Janeiro, RJ (Brazil); Marchiori, Edson [Universidade Federal Fluminense, Niteroi, RJ (Brazil). Dept. de Radiologia

    2001-06-01

    Closed loop obstruction of the bowel is an extremely grave condition that may lead to serious consequences and even be fatal. The authors describe a case of a patient with intestinal obstruction secondary to cancer of the sigmoid and highlight the importance of computed tomography in the analysis of the pathological changes in routine management of patients with acute abdomen. (author)

  8. Central nervous system abnormalities on midline facial defects with hypertelorism detected by magnetic resonance image and computed tomography; Anomalias de sistema nervoso central em defeitos de linha media facial com hipertelorismo detectados por ressonancia magnetica e tomografia computadorizada

    Energy Technology Data Exchange (ETDEWEB)

    Lopes, Vera Lucia Gil da Silva; Giffoni, Silvio David Araujo [Universidade Estadual de Campinas (UNICAMP), SP (Brazil). Faculdade de Ciencias Medicas. Dep. de Genetica Medica]. E-mail: vlopes@fcm.unicamp.br

    2006-10-15

    The aim of this study were to describe and to compare structural central nervous system (CNS) anomalies detected by magnetic resonance image (MRI) and computed tomography (CT) in individuals affected by midline facial defects with hypertelorism (MFDH) isolated or associated with multiple congenital anomalies (MCA). The investigation protocol included dysmorphological examination, skull and facial X-rays, brain CT and/or MRI. We studied 24 individuals, 12 of them had an isolated form (Group I) and the others, MCA with unknown etiology (Group II). There was no significant difference between Group I and II and the results are presented in set. In addition to the several CNS anomalies previously described, MRI (n=18) was useful for detection of neuronal migration errors. These data suggested that structural CNS anomalies and MFDH seem to have an intrinsic embryological relationship, which should be taken in account during the clinical follow-up. (author)

  9. Comparison of ultrasonography, computed tomography and magnetic resonance imaging with intraoperative measurements in the evaluation of abdominal aortic aneurysms; Comparacao entre ultrassonografia, tomografia computadorizada e ressonancia nuclear magnetica com medidas intra-operatorias na avaliacao dos aneurismas de aorta abdominal

    Energy Technology Data Exchange (ETDEWEB)

    Azevedo, Francisco das Chagas de; Zerati, Antonio Eduardo; Blasbalg, Roberto; Wolosker, Nelson; Puech-Leao, Pedro [Sao Paulo Univ., SP (Brazil). Faculdade de Medicina. Hospital das Clinicas]. E-mail: nwolosker@yahoo.com.br

    2005-01-15

    Purpose: To study the imaging exams more commonly used for abdominal aortic aneurysms evaluation - ultrasonography, conventional computerized tomography, helical computerized tomography and nuclear magnetic angio resonance - comparing the preoperative measurements reached by those radiological methods with the measurements made during the surgical procedures. Methods: Patients who had indication of elective transperitoneal surgical treatment for their abdominal aortic aneurysms were included in the study. The initial diagnosis of the aortic dilatation was made by ultrasonography and, after the surgical treatment was indicated, the patient was submitted to another imaging method.Sixty patients were divided into 3 groups according to the complementary imaging method (conventional computerised tomography, helical computerized tomography, nuclear magnetic angio resonance). The ultrasonography of the first 20 patients were joined in a fourth group. There were considered in the study the measurements of the transversal diameter of the proximal neck, maximum transversal diameter of the aneurysm, straight-line length and transversal diameter of the common iliac arteries given by the imaging methods. The same measurements were made by using a caliper during the surgical procedure, and then compared to the values obtained from the radiological exams.Results: The maximum transverse diameter had a range measurement variation of 4.5 to 13.6 cm in the intraoperative, with no statistically significant differences when compared with all the imaging tests. The ultrasonography, however, overestimated the measurements of the proximal neck and the common iliac arteries, in comparison with intraoperative measures. The length of the aorta aneurysm obtained by the conventional computerized tomography was significantly lower if compared to the measures done with the calliper during the operation. The helical computerized tomography and the nuclear magnetic angio resonance provided measurements with no significant differences in the statistic view when compared to the intraoperative measures. Conclusions: Ultrasonography is a reliable method for the diagnosis and follow-up of the aorta abdominal aneurysms, but insufficient for endovascular surgery planning. The conventional computed tomography can provoke distortion in the length measurements of the aorta dilatation. Helical computed tomography and nuclear magnetic angio resonance provided precise measurements of all the studied parameters, being of great utility for surgical planning. (author)

  10. Schwannoma of the nasal septum

    Directory of Open Access Journals (Sweden)

    Abdullah Karatas

    2016-11-01

    Full Text Available Schwannomas are benign and slow growing tumors originating from the Schwann cells of peripheral nerve sheath. Schwannomas of sinonasal origin are rare (4% however septal schwannomas are much more rarer. We presented a 31 year old female patient. At physical examination a pale gray, smooth polypoid lesion obstructing the right nasal cavity was detected. Midfacial degloving and endoscopic approach were combined for surgical treatment. The tumor was originating from posteromedial area of the septal nasal cartilage, close to the bony cartilaginous junction. Postoperative histological examination of the specimen showed a benign tumoral growth consisting of spindle shaped cells and immunohistochemical staining of the tumor proved septal schwannoma.

  11. Aspiration of Nasopore nasal packing.

    Science.gov (United States)

    Smith, Jonathan; Reddy, Ekambar

    2017-10-04

    We present a case of postoperative Nasopore aspiration in an otherwise fit and well 11-year-old. An endoscopic adenoidectomy had been performed without incident and Nasopore packing placed into each nasal cavity. Immediately after extubation, there was marked hypoxia, tachypnoea and high clinical suspicion of pack aspiration. The patient returned to theatre for emergency rigid bronchoscopy and retrieval of nasal packing. © BMJ Publishing Group Ltd (unless otherwise stated in the text of the article) 2017. All rights reserved. No commercial use is permitted unless otherwise expressly granted.

  12. Importância da tomografia de córnea para o diagnóstico de ectasia

    OpenAIRE

    Valbon,Bruno de Freitas; Salomão, Marcella [UNIFESP; RAMOS, Isaac; Canedo,Ana Laura; Nogueira,Leonardo; Ambrósio Jr,Renato

    2012-01-01

    OBJETIVO: Utilização da metodologia para interpretação da tomografia de córnea e segmento anterior para a detecção e diagnóstico de ectasia corneana. MÉTODOS: Descrição da interpretação clínica dos índices da tomografia de córnea e segmento anterior (Pentacam High Resolution - Oculus, Wetzlar,Germany); relato de 3 casos, demonstrando a importância da propedêutica no exame complementar, através do Pentacam HR®. CONCLUSÃO: Nossa experiência compatibiliza-se com os relatos de literatura na demon...

  13. Does Post Septoplasty Nasal Packing Reduce Complications?

    Directory of Open Access Journals (Sweden)

    Bijan Naghibzadeh

    2011-01-01

    Full Text Available The main issues in nasal surgery are to stabilize the nose in the good position after surgery and preserve the cartilages and bones in the favorable situation and reduce the risk of deviation recurrence. Also it is necessary to avoid the synechia formation, nasal valve narrowing, hematoma and bleeding. Due to the above mentioned problems and in order to solve and minimize them nasal packing, nasal splint and nasal mold have been advised. Patients for whom the nasal packing used may faced to some problems like naso-pulmonary reflex, intractable pain, sleep disorder, post operation infection and very dangerous complication like toxic shock syndrome. We have two groups of patients and three surgeons (one of the surgeons used post operative nasal packing in his patients and the two others surgeons did not.Complications and morbidities were compared in these two groups. Comparing the two groups showed that the rate of complication and morbidities between these two groups were same and the differences were not valuable, except the pain and discomfort post operatively and at the time of its removal. Nasal packing has several risks for the patients while its effects are not studied. Septoplasty can be safely performed without postoperative nasal packing. Nasal packing had no main findings that compensated its usage. Septal suture is one of the procedures that can be used as alternative method to nasal packing. Therefore the nasal packing after septoplasty should be reserved for the patients with increased risk of bleeding.

  14. Nasal pulse oximetry overestimates oxygen saturation

    DEFF Research Database (Denmark)

    Rosenberg, J; Pedersen, M H

    1990-01-01

    Ten surgical patients were monitored with nasal and finger pulse oximetry (Nellcor N-200) for five study periods with alternating mouth and nasal breathing and switching of cables and sensors. Nasal pulse oximetry was found to overestimate arterial oxygen saturation by 4.7 (SD 1.4%) (bias...

  15. Changes in nasal resistance and nasal geometry using pressure and acoustic rhinometry in a feline model of nasal congestion

    DEFF Research Database (Denmark)

    McLeod, R.L.; Mingo, G.G.; Herczku, C.

    1999-01-01

    This is the first report describing the use and pharmacological characterization of nasal patency by both pressure rhinometry and acoustic rhinometry (AcR) in an experimental cat model of nasal congestion. In pressure rhinometry studies, aerosolized compound 48/80 (0.1-3.0%), a mast cell liberator...... histamine (0.1-1.0%) on nasal geometry were similar to compound 48/80. We conclude that the cat is a useful model for evaluating the pharmacological actions of potential nasal decongestants. Furthermore, we also conclude that AcR is a useful method for noninvasive assessment of nasal patency...

  16. Actitudes de los candidatos y maestros de ciencias en servicio acerca del uso de las herramientas computadorizadas en las clases de ciencias

    Science.gov (United States)

    Bayuelo, Ezequiel

    Este estudio examino y comparo las actitudes de los candidatos a maestros de ciencias y los maestros de ciencias en servicio acerca de la utilizacion de las herramientas computadorizadas en las clases de ciencias. Tambien identifico y diferencio el uso que ellos dan a estas herramientas en las clases de ciencias. Este estudio presenta un diseno descriptivo exploratorio. Constituyeron la muestra trescientos diez sujetos que fueron candidatos a maestros de ciencias o maestros de ciencias en servicio. Para recoger los datos se construyo y valido un cuestionario de treinta y un itemes. Se utilizaron las pruebas estadisticas no parametricas Kruskal Wallis y Chi-cuadrado (test de homogeneidad) para establecer las diferencias entre las actitudes de los sujetos con relacion al uso de las herramientas computadorizadas en las clases de ciencias. Los hallazgos evidenciaron que son positivas y muy parecidas las actitudes de los candidatos a maestros y maestros en servicio hacia el uso de las herramientas computadorizadas. No hubo diferencias entre los candidatos y maestros en servicio en terminos de las actitudes de confianza y empatia hacia el uso de las herramientas computadorizadas en las clases de ciencias. En aspectos como el uso del banco de datos bibliografico Eric y el uso de las herramientas computadorizadas en actividades educativas como explorar conceptos, conceptuar, aplicar lo aprendido y hacer asignaciones hubo diferencias estadisticamente significativas entre los candidatos y los maestros en servicio. Al comparar las frecuencias observadas con las esperadas hubo mas maestros en servicio y menos candidatos que indicaron usar el anterior banco de datos y las herramientas computadorizadas en las mencionadas actividades educativas.

  17. Nasal intubation: A comprehensive review

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    Varun Chauhan

    2016-01-01

    Full Text Available Nasal intubation technique was first described in 1902 by Kuhn. The others pioneering the nasal intubation techniques were Macewen, Rosenberg, Meltzer and Auer, and Elsberg. It is the most common method used for giving anesthesia in oral surgeries as it provides a good field for surgeons to operate. The anatomy behind nasal intubation is necessary to know as it gives an idea about the pathway of the endotracheal tube and complications encountered during nasotracheal intubation. Various techniques can be used to intubate the patient by nasal route and all of them have their own associated complications which are discussed in this article. Various complications may arise while doing nasotracheal intubation but a thorough knowledge of the anatomy and physics behind the procedure can help reduce such complications and manage appropriately. It is important for an anesthesiologist to be well versed with the basics of nasotracheal intubation and advances in the techniques. A thorough knowledge of the anatomy and the advent of newer devices have abolished the negative effect of blindness of the procedure.

  18. Nasal continuous positive airway pressure

    DEFF Research Database (Denmark)

    Scholze, Alexandra; Lamwers, Stephanie; Tepel, Martin

    2012-01-01

    Obstructive sleep apnoea (OSA) is linked to increased cardiovascular risk. This risk can be reduced by nasal continuous positive airway pressure (nCPAP) treatment. As OSA is associated with an increase of several vasoconstrictive factors, we investigated whether nCPAP influences the digital volume...

  19. Diagnostic strategies in nasal congestion

    Directory of Open Access Journals (Sweden)

    John Krouse

    2010-02-01

    Full Text Available John Krouse1, Valerie Lund2, Wytske Fokkens3, Eli O Meltzer41Temple University School of Medicine, Philadelphia, PA, USA; 2Ear Institute, University College London, UK; 3Department of Otorhinolaryngology, Amsterdam Medical Centre, Netherlands; 4Allergy and Asthma Medical Group and Research Center, San Diego, CA and Department of Pediatrics, University of California, San Diego, USAAbstract: Nasal congestion is a major symptom of upper respiratory tract disorders, and its characterization an important part of the diagnosis of these illnesses. Patient history and assessment of nasal symptoms are essential components of diagnosis, providing an initial evaluation that may be adequate to rule out serious conditions. However, current congestion medications are not always fully effective. Thus, if symptoms do not respond adequately to therapy, or symptoms suggestive of more serious conditions are present, specialized assessments may be needed. Various techniques are available for diagnosing patients, including those used chiefly by primary care clinicians and those requiring the expertise of otolaryngologists, allergists, and other specialists. Endoscopy remains a mainstay for evaluating nasal blockage and its causes, while modalities such as peak nasal inspiratory flow and acoustic rhinometry are evolving to provide easy-to-use, noninvasive procedures that are sensitive enough to measure small but clinically important abnormalities and therapeutic changes. Several imaging modalities are available to the specialist for severe or unusual cases, as are specialized diagnostic procedures that measure adjunctive features of congestion, such as impaired mucociliary function.Keywords: allergic rhinitis, congestion, diagnosis, obstruction, rhinosinusitis

  20. Nasal Schwannoma: a case report

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    Siu-Navarro YJ, Pérez-Carbajal AJ

    2013-10-01

    Full Text Available Introduction: Schwannomas are benign tumors that arise from Schwann cells peripheral nerves sheath. About 25-45% occur in the head and neck and only 4% of these tumors involve the sinunasal tract.Objective: To provide, through a clinic case and lecture review, the clinical and radiopatology findings of a bening and unusual tumors, as are the Nasal schwannomas. Case Report: We report a case of a young woman with nasal schwannoma, who complain of left nasal obstruction and rhinorrhea, which after subsequent imaging studies, surgical and pathology analisis, diagnosis was found. Sustained a favorable clinical evolution.Results and Discussion: The clinic and radiologic findings are nonspecific, depend upon the location or size of the tumor and subsequent involvement of surrounding structures, but generally present as a mass with less agressive behavior. The elective treatment is surgery, confirming this disease by microscopic and immunohistochemistry studies.Conclusion: Given these aspects must be considered nasal schwannomas within the differential diagnosis of a tumor with less aggressive behavior, clinical-radiological, because implies good results for the patient and unusual recurrence after surgery.

  1. Immunophenotype Heterogeneity in Nasal Glomangiopericytoma

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    Adriana Handra-Luca

    2015-01-01

    Full Text Available Nasal glomangiopericytoma is rare. The immunophenotype is heterogeneous, more frequently smooth-muscle-actin and CD34-positive. We report expression patterns for several vascular-related proteins such as CD99, CD146, Bcl2, and WT1 as well as for treatment-related proteins such as mTOR and EGFR in a nasal glomangiopericytoma. The patient (woman, 86 years presented with a left nasal tumefaction. The resected specimen (1.5-cm showed a glomangiopericytoma. Tumor cells expressed smooth-muscle-actin, CD31, CD34, and progesterone receptor. They also expressed the vascular-cell-related proteins Bcl2, CD99, CD146, and WT1, as well as mTOR and EGFR. Nasal glomangiopericytomas show immunohistochemical heterogeneity for vascular-related markers, suggesting a possible extensive pericytic differentiation. The expression of potential targets for drug treatments such as mTOR and EGFR may impact on the clinical follow-up of these tumors occurring at advanced ages, which may require complex surgery.

  2. Nasal Septum Perforation due to Methamphetamine abuse

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    Mehdi Bakhshaee

    2012-07-01

    Full Text Available Introduction: Spontaneous Perforation of the nasal septum is an uncommon condition. Nasal inhalation of substances such as cocaine has long been linked to this Perforation. Case Report: This report describes the case of a 46-year-old woman who was addicted to methamphetamine and who presented with perforation of the nasal septum.This is the first reported case of nasal septal necrosis linked to nasal inhalation of methamphetamine. Conclusions: Patient history and assurance regardingillegal drug consumption and abuse is a key point for fast and accurate diagnosis. The pathophysiology of drug-induced sinunasal disease and a review of the literature are also presented.

  3. Idiopathic calcinosis cutis of nasal dorsum

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    Shrinath D.P Kamath

    2012-01-01

    Full Text Available A 23-year-old lady presented with a slowly progressing firm mass on the nasal dorsum since 8 months. Her biochemical, haematological and collagen vascular disease screening tests were normal. Radiographs of the nasal bones showed a subcutaneous calcifying lesion with no evidence of nasal bone erosion. A diagnosis of idiopathic calcinosis cutis (ICC was made. The mass was excised and soft tissue defect was augmented with silicone prosthesis. The histopathology with the haematoxylin and eosin staining and von Kossa stain confirmed the diagnosis of calcinosis cutis. This is an unusual presentation of ICC involving the nasal dorsum requiring surgery and nasal dorsal augmentation with silicone prosthesis.

  4. Appraisal of transverse nasal groove: A study

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    Belagola D Sathyanarayana

    2012-01-01

    Full Text Available Background: Transverse nasal groove is a condition of cosmetic concern which awaits due recognition and has been widely described as a shallow groove that extends transversely over the dorsum of nose. However, we observed variations in the clinical presentations of this entity, hitherto undescribed in literature. Aims: We conducted a clinicoepidemiological study of transverse nasal lesions in patients attending our outpatient department. Methods: We conducted a prospective observational study. We screened all patients attending our out-patient department for presence of transverse nasal lesions, signs of any dermatosis and associated other skin conditions. Results: One hundred patients were recruited in the study. Females (80% predominated over males. Most patients were of 15-45 years age group (70%. Majority of the transverse nasal lesions were classical transverse nasal groove (39% and others included transverse nasal line (28%, strip (28%, ridge (4% and loop (1%. Seborrhoeic diathesis was the most common condition associated with transverse nasal lesion. Conclusions: Occurrence of transverse nasal line, strip, ridge and loop, in addition to classical transverse nasal groove implies that latter is actually a subset of transverse nasal lesions. Common association of this entity with seborrheic dermatitis, seborrhea and dandruff raises a possibility of whether transverse nasal lesion is a manifestation of seborrheic diathesis.

  5. A simple nasal anemometer for clinical purposes.

    Science.gov (United States)

    Hutters, B; Brøndsted, K

    1992-01-01

    There is a need for clinical methods which give more direct information about the behaviour of the velopharyngeal mechanism in natural speech than do the examination methods normally applied to patients suffering from velopharyngeal insufficiency. One possibility is the recording of nasal airflow in order to detect nasal emission of air. The purpose of the present study is to examine the qualities and the characteristics of a simple and cheap nasal anemometer. As this type of flowmeter is considered less reliable than most other flowmeters, its limitations must be clearly understood and accounted for in drawing conclusions. Therefore, nasal airflow in speech obtained with this flowmeter is discussed in relation to nasal airflow obtained by the more reliable pneumotachograph and in relation to nasal airflow data found in the literature. The tests made here suggest that, at least for the type of speech material and measurements used in the present study, reliable nasal airflow data can be obtained by the anemometer.

  6. Effect of rapid maxillary expansion on the dimension of the nasal cavity and on facial morphology assessed by acoustic rhinometry and rhinomanometry Efeito da expansão rápida da maxila na dimensão da cavidade nasal e morfologia facial pela rinometria acústica e rinomanometria

    Directory of Open Access Journals (Sweden)

    Carla Enoki Itikawa

    2012-08-01

    Full Text Available OBJECTIVE: To assess the effects of rapid maxillary expansion on facial morphology and on nasal cavity dimensions of mouth breathing children by acoustic rhinometry and computed rhinomanometry. METHODS: Cohort; 29 mouth breathing children with posterior crossbite were evaluated. Orthodontic and otorhinolaryngologic documentation were performed at three different times, i.e., before expansion, immediately after and 90 days following expansion. RESULTS: The expansion was accompanied by an increase of the maxillary and nasal bone transversal width. However, there were no significant differences in relation to mucosal area of the nose. Acoustic rhinometry showed no difference in the minimal cross-sectional area at the level of the valve and inferior turbinate between the periods analyzed, although rhinomanometry showed a statistically significant reduction in nasal resistance right after expansion, but were similar to pre-treatment values 90 days after expansion. CONCLUSION: The maxillary expansion increased the maxilla and nasal bony area, but was inefficient to increase the nasal mucosal area, and may lessen the nasal resistance, although there was no difference in nasal geometry. Significance: Nasal bony expansion is followed by a mucosal compensation.OBJETIVO: avaliar o efeito da expansão rápida da maxila na dimensão da cavidade nasal e na morfologia facial através da rinometria acústica e rinomanometria computadorizada. MÉTODOS: foram avaliadas 29 crianças na fase de dentição mista, portadoras de respiração bucal e mordida cruzada posterior. A documentação ortodôntica e a avaliação otorrinolaringológica foram realizadas em três tempos - antes da expansão rápida da maxila, imediatamente após e 90 dias depois. RESULTADOS: a expansão promoveu um aumento na dimensão da cavidade nasal e na maxila transversalmente. Contudo, não houve diferenças significativas na área da mucosa nasal. A rinometria acústica mostrou que n

  7. Smart polymers in nasal drug delivery

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    Ankita Chonkar

    2015-01-01

    Full Text Available Nasal drug delivery has now been recognized as a promising route for drug delivery due to its capability of transporting a drug to systemic circulation and central nervous system. Though nasal mucosa offers improved bioavailability and quick onset of action of the drug, main disadvantage associated with nasal drug delivery is mucocilliary clearance due to which drug particles get cleared from the nose before complete absorption through nasal mucosa. Therefore, mucoadhesive polymeric approach can be successfully used to enhance the retention of the drug on nasal mucosal surface. Here, some of the aspects of the stimuli responsive polymers have been discussed which possess liquid state at the room temperature and in response to nasal temperature, pH and ions present in mucous, can undergo in situ gelation in nasal cavity. In this review, several temperature responsive, pH responsive and ion responsive polymers used in nasal delivery, their gelling mechanisms have been discussed. Smart polymers not only able to enhance the retention of the drug in nasal cavity but also provide controlled release, ease of administration, enhanced permeation of the drug and protection of the drug from mucosal enzymes. Thus smart polymeric approach can be effectively used for nasal delivery of peptide drugs, central nervous system dugs and hormones.

  8. Nasal Outcomes of Presurgical Nasal Molding in Complete Unilateral Cleft Lip and Palate

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    Emily M. Williams

    2012-01-01

    Full Text Available Objective. Short-term nasal forms following primary lip repair were compared between presurgical nasal molding and control groups. Aim. To compare nasal symmetry between patients that had nasal molding and lip repair with those that had only lip repair. Design. Retrospective case-control study Patients. Complete unilateral CL+P patients had basilar and frontal photographs at two time points: (1 initial (2 postsurgical. 28 nasal molding patients and 14 control patients were included. Intervention. Presurgical nasal molding was performed prior to primary lip repair in intervention group. No nasal molding was performed in control group. Hypothesis. Nasal molding combined with lip surgery repair according to the Millard procedure provides superior nasal symmetry than surgery alone for nostril height-width ratios and alar groove ratios. Statistics. Shapiro-Wilk test of normality and Student’s -tests. Results. A statistically significant difference was found for postsurgical nostril height-width ratio (<.05. No other statistically significant differences were found. Conclusions. Nasal molding and surgery resulted in more symmetrical nostril height-width ratios than surgery alone. Alar groove ratios were not statistically significantly different between groups perhaps because application of nasal molding was not early enough; postsurgical nasal splints were not utilized; overcorrection was not performed for nasal molding.

  9. Program standard of quality control for a system of Positron Emission Tomography-computed tomography (PET-CT) used in the Foundation Valle de Lili; Programa estandar de control de calidad para un sistema de tomografia por emision de positrones-tomografia computadorizada (PET-CT) utilizado en la Fundacion Valle del Lili

    Energy Technology Data Exchange (ETDEWEB)

    Nunez, Nathalia I.; Benavides, Sivor O., E-mail: Nnunez@fcvl.org, E-mail: Obenavides@fcvl.org [Fundacion Valle del Lili (OFM-PR/FVL), Cali (Colombia). Dept. de Fisica Medica y Proteccion Radiologica; Lopera, Wilson, E-mail: wilson.lopera@correounivalle.edu.co [Universidad del Valle, Cali (Colombia). Dept. de Fisica

    2013-07-01

    A standard protocol of quality control in the Fundacion Valle del Lili for the implementation of a multimodal scanner developed emission tomography BIOGRAPH mCT X-3R of SIEMENS Registered-Sign covering routine testing, frequency, acceptance ranges necessary corrective and preventive measures to detect and correct any faults and proceed if the upper detection precision and accuracy ranges accepted deviations actions. In order to minimize errors in the planning and management of patient dose, thereby improving the quality of the diagnostic image with the dose of radiation is reasonably low as possible, consistent with the clinical use of the equipment used and the information requested diagnostic study.

  10. Unusual Postrhinoplasty Complication: Nasal Dorsum Cyst

    Directory of Open Access Journals (Sweden)

    Pier Giorgio Giacomini

    2014-01-01

    Full Text Available Among all the possible complications of aesthetic rhinoplasty, a rare one is the development of cystic masses on the nasal dorsum: several theories suggest that cysts develop commonly by entrapment of nasal mucosa in the subcutaneous space, but they can also originate from foreign body reactions. This report deals with two cases of nasal dorsum cysts with different pathogenesis: both patients had undergone aesthetic rhinoplasty in the past (26 years ago and 14 years ago, resp.. Both cystic masses were removed via a direct open approach and nasal reconstruction was performed successfully with autologous vomer bone. The pathologic investigations showed a foreign body inclusion cyst associated with latex rubber in the first case and a sequestration of a mucosal-lined nasal bone was not removed at the time of primary rhinoplasty in the second case. A brief review of the literature focuses on the pathophysiology and treatment options for nasal dorsal cysts following aesthetic rhinoplasty.

  11. Post septorhinoplasty custom-made unilateral nasal stent for nasal cleft deformity

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    Manu Rathee

    2015-01-01

    Full Text Available Context: Nasal cleft deformity is a complicated problem. Utilization of nasal stent in post septorhinoplastyaims at establishing and maintaining airway patency, tissue position, and reduces tissue contracture after surgery. Case Report: A 16-year-old female patient presented with history of surgical reconstruction of congenital cleft lip and cleft palate with secondary septorhinoplasty of nasal cleft deformity. Patient was referred for nasal stent 1 week after septorhinoplasty. This case report provides a novel technique for fabrication of esthetic nasal stent after postseptorhinoplasty for secondary cleft nose deformity correction. Conclusion: This case report presents a simple, convenient technique for nasal stent fabrication for prevention of restenosis for cleft nose deformity post secondary septorhinoplasty. Provision of nasal stent allows breathing, maintains esthetics, comfort, nasal patency, and contour with minimal discomfort.

  12. Post septorhinoplasty custom-made unilateral nasal stent for nasal cleft deformity

    OpenAIRE

    Manu Rathee; Mohaneesh Bhoria; Priyanka Boora

    2015-01-01

    Context: Nasal cleft deformity is a complicated problem. Utilization of nasal stent in post septorhinoplastyaims at establishing and maintaining airway patency, tissue position, and reduces tissue contracture after surgery. Case Report: A 16-year-old female patient presented with history of surgical reconstruction of congenital cleft lip and cleft palate with secondary septorhinoplasty of nasal cleft deformity. Patient was referred for nasal stent 1 week after septorhinoplasty. This case repo...

  13. IgG4-Related Nasal Pseudotumor

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    L. K. Døsen

    2015-01-01

    Full Text Available IgG4-related disease is recognized as one form of autoimmune pancreatitis. During the last ten years, it has also been described in several other organs. We present two patients with lesions showing a histological picture of fibrosis and lymphoplasmacytic infiltrations with abundant IgG4 positive plasma cells at hitherto unreported symmetrical nasal locations. The symmetrical complex consisted of one central lesion in the anterior nasal septum and the two others in each of the lateral nasal walls. The lesions extended from the anterior part of the inferior concha into the vestibulum and caused severe nasal obstruction.

  14. Nasal Myiasis in Hinduism and Contemporary Otorhinolaryngology.

    Science.gov (United States)

    Bosmia, Anand N; Zimmermann, Terence M; Griessenauer, Christoph J; Shane Tubbs, R; Rosenthal, Eben L

    2017-08-01

    Various case reports on nasal myiasis written during the 1990s and 2000s state that nasal myiasis, which is known as peenash among South Asian natives, is a form of divine punishment in Hindu mythology, but do not provide citations from Hindu scriptures that would suggest this interpretation. This paper aims to discuss the phenomenon of peenash in a historical context by examining medical literature written during the nineteenth and early twentieth centuries, to identify Hindu texts contributing to the belief of some Hindus that nasal myiasis is a form of divine punishment, and to provide an overview of contemporary treatment for and management of nasal myiasis.

  15. Nasal and Oral Consonant Similarity in Speech Errors: Exploring Parallels with Nasal Consonant Harmony

    Science.gov (United States)

    Walker, Rachel

    2007-01-01

    Previous research has found that "similar" sounds interact in phonological nasal consonant harmony, wherein certain consonants become nasals when the word contains a nasal (e.g., Kikongo: /-kun-idi/ [right arrow] [-kun-ini] "planted"). Across languages, stops and approximants are chiefly affected, especially voiced consonants and ones that match…

  16. Perception of Better Nasal Patency Correlates with Increased Mucosal Cooling after Surgery for Nasal Obstruction

    Science.gov (United States)

    Garcia, Guilherme; Sullivan, Corbin; Frank-Ito, Dennis; Kimbell, Julia; Rhee, John

    2014-11-01

    Nasal airway obstruction (NAO) is a common health problem with 340,000 patients undergoing surgery annually in the United States. Traditionally, otolaryngologists have focused on airspace cross-sectional areas and nasal resistance to airflow as objective measures of nasal patency, but neither of these variables correlated consistently with patients' symptoms. Given that the sensation of nasal airflow is also associated with mucosal cooling (i.e., heat loss) during inspiration, we investigated the correlation between the sensation of nasal obstruction and mucosal cooling in 10 patients before and after NAO surgery. Three-dimensional models of the nasal anatomy were created based on pre- and post-surgery computed tomography scans. Computational fluid dynamics (CFD) simulations were conducted to quantify nasal resistance and mucosal cooling. Patient-reported symptoms were measured by a visual analog scale and the Nasal Obstruction Symptom Evaluation (NOSE), a disease-specific quality of life questionnaire. Our results revealed that the subjective sensation of nasal obstruction correlated with both nasal resistance and heat loss, but the strongest correlation was between the NOSE score and the nasal surface area where heat flux exceeds 50 W /m2 . In conclusion, a significant post-operative increase in mucosal cooling correlates well with patients' perception of better nasal patency after NAO surgery.

  17. Numbered nasal discs for waterfowl

    Science.gov (United States)

    Bartonek, J.C.; Dane, C.W.

    1964-01-01

    Numbered nasal discs were successfully used in studies requiring large numbers of individually marked waterfowl. The procedure for constructing these discs is outlined. Blue-winged teal (Anas discors) with 5/8-inch discs, and canvasback (Aythya valisineria) and redhead (A. americana) with 3/4-inch discs can be individually identified up to 50 and 80 yards, respectively, with a gunstock-mounted, 20-power spotting scope. The particular value of these markers is their durability, the number of combinations possible, and the apparent absence of behavioral or mortality influence among such species as the blue-winged teal.

  18. NASAL INVERTED PAPILLOMA OF UNUSUAL ORIGIN

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    kasim s. kasim

    2013-12-01

    Full Text Available Two cases of Schneiderian papilloma of the nasal septum are presented. The condition is rare, as indicated by a review of previously published cases. The clinical course of the lesion suggests that it behaves like Schneiderian papillomas elsewhere in the nasal cavity and paranasal sinuses. The need for aggressive surgical management and careful follow-up is emphasized.

  19. ANTHROPOMETRIC STUDY OF NASAL INDEX OF EGYPTIANS

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    Abdelmonem Awad Hegazy

    2014-12-01

    Full Text Available Background: The nasal index determination is one of the most commonly used anthropometric parameters in classifying human races. There are few reports in medical literature concerning nasal index that specifically address particular Egyptian populations. The objective of this study was to determine the normal parameters of external nose (width, height and nasal index in Egyptians. Methods: The study was conducted randomly on healthy Egyptian subjects of both sexes. Nasal height and width were measured using vernier caliper. Then, nasal index was determined for each subject. The obtained data were subjected to statistical analysis. Results: A total of 290 subjects, 144 males and 146 females, aged 1 month– 65 years, were enrolled in the study. The study showed the existence of sexual dimorphism in nasal morphology, appearing after the age 20 years. The mean nasal index in the investigated adults was 68.01; in males and females was 71.46 and 64.56, respectively. Conclusions: The dominant nasal type in Egyptians was in-between mesorrhine "medium" and leptorrhine "narrow" nose. Forensic and anthropological research, as well as cosmetic and reconstructive surgery may benefit from age- and sex- based data of the study.

  20. Rhinoscleroma and nasal non-Hodgkin lymphoma

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    Oliveira, Henrique Fernandes de

    2009-03-01

    Full Text Available Introduction: Rhinoscleroma, a rare nasal granulomatous disease, is caused by Klebsiella rhinoscleromatis. The nose is the primary occurrence region. Nasal non-Hodgkin lymphoma is a rare cancer, and could be of T or B type. The rhinoscleroma and the nasal non-Hodgkin lymphoma present with nasal obstruction as the main symptom, and are part of the nasal granulomatosis differential diagnosis. Objective: To report the association of rhinoscleroma and non-Hodgkin lymphoma in the same patient, by remarking the importance of the nasal granulomatosis' differential diagnosis. Case Report: A forty-nine year old female patient that appeared with a one-month progressive nasal obstruction. Rhinoscopy showed papillomatous feature lesion in left middle meatus. The immunohistochemical analysis confirmed rhinoscleroma. The patient was duly treated with total remission of the lesion. Ten months after, she returned with the same symptoms, but the histologic study confirmed non-Hodgkin lymphoma. Final Comments: Both pathologies may cause more severe nasal symptoms and complications. The early diagnostic enables the choice for the right treatment and contributes for the prognosis. The immunohistochemical study was essential for the diagnostic differentiation.

  1. Nasal Airway Resistance: Its Measurement and Regulation.

    Science.gov (United States)

    Hamilton, Lyle H.

    1979-01-01

    Reviews studies of regulation of nasal airway resistance (Rn). Describes methods of calculating Rn by measuring pressure-flow relationship. Data are presented on improved methods for measuring Rn and effects for expiratory and inspiratory Rn after topical application of phenylephrine nasal decongestant spray. (Author/SA)

  2. Assessment of nasalance and nasality in patients with a repaired cleft palate.

    Science.gov (United States)

    Sinko, Klaus; Gruber, Maike; Jagsch, Reinhold; Roesner, Imme; Baumann, Arnulf; Wutzl, Arno; Denk-Linnert, Doris-Maria

    2017-03-15

    In patients with a repaired cleft palate, nasality is typically diagnosed by speech language pathologists. In addition, there are various instruments to objectively diagnose nasalance. To explore the potential of nasalance measurements after cleft palate repair by NasalView(®), we correlated perceptual nasality and instrumentally measured nasalance of eight speech items and determined the relationship between sensitivity and specificity of the nasalance measures by receiver-operating characteristics (ROC) analyses and AUC (area under the curve) computation for each single test item and specific item groups. We recruited patients with a primarily repaired cleft palate receiving speech therapy during follow-up. During a single day visit, perceptive and instrumental assessments were obtained in 36 patients and analyzed. The individual perceptual nasality was assigned to one of four categories; the corresponding instrumental nasalance measures for the eight specific speech items were expressed on a metric scale (1-100). With reference to the perceptual diagnoses, we observed 3 nasal and one oral test item with high sensitivity. However, the specificity of the nasality indicating measures was rather low. The four best speech items with the highest sensitivity provided scores ranging from 96.43 to 100%, while the averaged sensitivity of all eight items was below 90%. We conclude that perceptive evaluation of nasality remains state of the art. For clinical follow-up, instrumental nasalance assessment can objectively document subtle changes by analysis of four speech items only. Further studies are warranted to determine the applicability of instrumental nasalance measures in the clinical routine, using discriminative items only.

  3. Measurement of secretion in nasal lavage

    DEFF Research Database (Denmark)

    Bisgaard, H; Krogsgaard, O W; Mygind, N

    1987-01-01

    secretion to be carried out on the whole sample of lavage fluid, thereby avoiding the necessity of complete admixture between marker and lavage fluid which would be pertinent to marker molecules measured chemically. The radiation from a nasal lavage is minimal and the procedure is fully acceptable...... for repeated use in humans. 4. The nasal lavage technique adopted allowed the return of 99.2% (median value) of the instilled volume. The area irrigated was visualized on a gamma-camera, and was demonstrated to cover an area larger than the area reached by challenge from a pumpspray, i.e. a large part...... of the nose, yet not the oropharynx. 5. A dose related increase in nasal secretion harvested by the nasal lavage in 10 persons challenged with histamine chloride could be demonstrated by this technique. 6. It is concluded that the use of 99mTc-albumin in a nasal washing provides a safe, simple and quick...

  4. [Nasal foreign body in infants].

    Science.gov (United States)

    Claudet, I; Salanne, S; Debuisson, C; Maréchal, C; Rekhroukh, H; Grouteau, E

    2009-09-01

    Provide a descriptive analysis of children admitted to a tertiary care pediatric emergency department (PED) for a nasal foreign body (NFB) and describe the current knowledge and management of such accidents. A retrospective study was conducted from January 2003 to May 2008, including all patients aged less than 15 years admitted for a NFB. The data collected were age, sex, geographic origin, time and day of admission, duration in PED, duration of NFB insertion, nostril location, symptoms and clinical signs, prehospital extraction attempts, facial x-ray, extraction mode, referral to an ENT specialist, progression, and complications. For statistical analysis, the data were entered in Microsoft Excel spreadsheets. The data were analyzed with StatView 5.1 (SAS Institute) and EpiInfo 6.04fr (VF, ENSP Epiconcept). In the descriptive analysis, the data are presented as mean values with standard deviation, median with extreme values or with 95% confidence intervals where appropriate, unless otherwise indicated. To compare qualitative variables, a chi(2) test (Mantel-Haenszel) was used and the two-tailed Fisher exact test if the expected value was 5 or less. Statistical significance was set at pChildren aged less than 4 years accounted for 71% of the studied population. The mean age was 3.5+/-1.6 years (range, 1.4-13 years). The majority of accidents occurred at home (95%). The length of time spent in the PED was 78+/-57 min. The NFB duration of insertion was unknown in one-quarter of cases, present for less than 4 h in 65% of cases. No symptoms were described in most cases (88%). When symptoms were described, bleeding, pain or nasal discomfort, and foul nasal odor were the principal symptoms. The right nostril was the predominant location (60%). This difference tended to disappear in the group of children aged less than 4 years. Five children had bilateral NFB. Nonorganic compounds accounted for 80% of the NFB: plastic beads or balls (39%), plastic or toy parts (20

  5. Eletrocardiografia computadorizada em cavalos Puro Sangue Lusitano submetidos a exercício físico

    OpenAIRE

    A. Melchert; C.B. Laposy; V.H.B Guasi; Valle,H.F.D.; Santos,G.C.

    2012-01-01

    Foram estudados 24 cavalos atletas hígidos, machos, adultos, da raça Puro Sangue Lusitano, submetidos a esforço físico de trote e galope de rotina do animal, com o objetivo de avaliar a configuração do traçado do eletrocardiograma (ECG) em repouso, mediante eletrocardiografia computadorizada, bem como os efeitos do exercício físico sobre os parâmetros clínicos e eletrocardiográficos destes animais. Foram avaliados exame físico e ritmo cardíaco antes e imediatamente após o exercício físico, as...

  6. Avaliando linguagem receptiva via teste de vocabulário por imagens peabody: versão tradicional versus computadorizada

    OpenAIRE

    Macedo,Elizeu Coutinho de; Capovilla, Fernando César; Duduchi, Marcelo; D’Antino, Maria Eloísa Famá; Firmo, Lyzandre dos Santos

    2009-01-01

    Instrumentos padronizados de avaliação da linguagem permitem detecção precoce de atraso de linguagem e intervenção precoce para prevenir fracasso escolar. Este estudo comparou o desempenho de pré-escolares nas versões tradicional e computadorizada do Teste de Vocabulário por Imagens Peabody, correlacionou as pontuações nessas versões e descreveu a evolução do vocabulário receptivo em função de idade e série escolar. Noventa crianças de 4 a 6 anos de idade do ensino infantil de uma escola part...

  7. Functional nasal morphology of chimaerid fishes.

    Science.gov (United States)

    Howard, Lauren E; Holmes, William M; Ferrando, Sara; Maclaine, James S; Kelsh, Robert N; Ramsey, Andrew; Abel, Richard L; Cox, Jonathan P L

    2013-09-01

    Holocephalans (chimaeras) are a group of marine fishes comprising three families: the Callorhinchidae (callorhinchid fishes), the Rhinochimaeridae (rhinochimaerid fishes) and the Chimaeridae (chimaerid fishes). We have used X-ray microcomputed tomography and magnetic resonance imaging to characterise in detail the nasal anatomy of three species of chimaerid fishes: Chimaera monstrosa, C. phantasma and Hydrolagus colliei. We have shown that the nasal chamber of these three species is linked to the external environment by an incurrent channel and to the oral cavity by an excurrent channel via an oral groove. A protrusion of variable morphology is present on the medial wall of the incurrent channel in all three species, but is absent in members of the two other holocephalan families that we inspected. A third nasal channel, the lateral channel, functionally connects the incurrent nostril to the oral cavity, by-passing the nasal chamber. From anatomical reconstructions, we have proposed a model for the circulation of water, and therefore the transport of odorant, in the chimaerid nasal region. In this model, water could flow through the nasal region via the nasal chamber or the lateral channel. In either case, the direction of flow could be reversed. Circulation through the entire nasal region is likely to be driven primarily by the respiratory pump. We have identified several anatomical features that may segregate, distribute, facilitate and regulate flow in the nasal region and have considered the consequences of flow reversal. The non-sensory cilia lining the olfactory sensory channels appear to be mucus-propelling, suggesting that these cilia have a common protective role in cartilaginous fishes (sharks, rays and chimaeras). The nasal region of chimaerid fishes shows at least two adaptations to a benthic lifestyle, and suggests good olfactory sensitivity, with secondary folding enhancing the hypothetical flat sensory surface area by up to 70%.

  8. Involvement of vascular endothelial growth factor in nasal obstruction in patients with nasal allergy

    Directory of Open Access Journals (Sweden)

    Tetsuji Yamashita

    2000-01-01

    Full Text Available It has recently been shown that vascular endothelial growth factor (VEGF enhances vascular permeability and that mast cells produce VEGF, suggesting the involvement of VEGF in allergic diseases. In the present study we quantitatively analyzed VEGF in the nasal lavage fluid of patients with nasal allergy. We performed nasal antigen challenge with Japanese cedar pollen antigen in 10 healthy adult volunteers and in 10 cedar pollen IgE-positive patients with nasal allergy. In all patients with nasal allergy, VEGF and histamine levels in the nasal lavage fluid reached a peak 30 min after antigen challenge, then returned to prechallenge values 2 h after antigen challenge. In these patients, the histamine level increased three-fold, while the VEGF level increased 10-fold. However, in all healthy adult volunteers, VEGF and histamine levels did not increase. A stronger correlation was noted between the ratio of decreased nasal cavity volume and the ratio of increased VEGF levels (R = 0.823; P < 0.001 than between the ratio of nasal cavity volume and the ratio of increased histamine levels (R = 0.660; P < 0.01. These results suggest that VEGF may contribute to the pathogenesis of nasal obstruction in the early phase of nasal allergy as a new factor involved in increasing vascular permeability.

  9. Endoscopic removal of nasal septum chondrosarcoma in paediatric patient

    Directory of Open Access Journals (Sweden)

    Muhammad Nasri Abu Bakar

    2014-07-01

    We report a boy with progressive history of nasal obstruction and epistaxis. Nasal endoscopy revealed a mass arising from nasal septum. Endoscopic excision of the tumour was successfully done followed by radiotherapy. Endoscopic excision of chondrosarcoma of the nasal septum in its early stage should be considered for better outcome.

  10. Nasal obstruction and smell impairment in nasal polyp disease: correlation between objective and subjective parameters.

    Science.gov (United States)

    Hox, V; Bobic, S; Callebaux, I; Jorissen, M; Hellings, P W

    2010-12-01

    Chronic rhinosinusitis with nasal polyposis (NP) represents an invalidating disorder that causes mainly nasal blockage and loss of smell. The aim of this study is to investigate correlations between individual subjective and objective parameters of stable NP disease. 65 NP patients scored their sinonasal symptoms on a visual analogue scale (VAS) and questionnaires (SNOT-22 and SF-36). Peak nasal inspiratory flow (PNIF) measurement, Sniffinatm Sticks (SS) smell test, blood analysis for eosinophilia, total IgE and culture for Staphylococcus aureus (SA) were performed. VAS scores for nasal blockage correlated with the SNOT-22 and SF-36 scores, which was not observed for VAS of other symptoms. VAS scores for nasal blockage correlated well with PNIF values as well as VAS scores for smell dysfunction and SS results (both psmell reduction (psmell reduction in NP disease. Nasal blockage is the only symptom that correlates well with NP size and SNOT-22 scores, whereas smell reduction correlates with blood eosinophilia.

  11. Effect of Local Nasal Immunotherapy on Nasal Blockage in Pollen-Induced Allergic Rhinitis of Guinea Pigs

    Directory of Open Access Journals (Sweden)

    Takeshi Nabe

    2008-01-01

    Conclusions: Local nasal immunotherapy may be clinically useful for allergic nasal blockage associated with nasal hyperresponsiveness. The mechanisms responsible for this effectiveness might not be related to IgE production. Additionally, the effectiveness for nasal tissue was dissociated from that seen for the ocular tissue.

  12. A model of airflow in the nasal cavities: Implications for nasal air conditioning and epistaxis.

    Science.gov (United States)

    Bailie, Neil; Hanna, Brendan; Watterson, John; Gallagher, Geraldine

    2009-01-01

    A friction force is generated when moving air contacts the nasal walls, referred to as wall shear stress. This interaction facilitates heat and mass transfer between the mucosa and air, i.e., air-conditioning. The objective of this research was to study the distribution of wall shear stress within the nasal cavity to identify areas that contribute significantly to air-conditioning within the nasal cavity. Three-dimensional computational models of the nasal airways of five healthy subjects (three male and two female subjects) were constructed from nasal CT scans. Numerical simulations of nasal airflow were conducted using the commercial computational fluid dynamics code Fluent 6 (Ansys, Inc., Canonsburg, PA). Wall shear stress was derived from the numerical simulation. Air-conditioning was simulated to confirm the relationship with wall shear stress. Nasal airflow simulations predicted high wall shear stress along the anterior aspect of the inferior turbinate, the anteroinferior aspect of the middle turbinate, and within Little's area. The airflow simulations indicate that the inferior and middle turbinates and Little's area on the anterior nasal septum contribute significantly to nasal air-conditioning. The concentration of wall shear stress within Little's area indicates a desiccating and potentially traumatic effect of inhaled air that may explain the predilection for spontaneous epistaxis at this site.

  13. Influence of cooling face masks on nasal air conditioning and nasal geometry.

    Science.gov (United States)

    Lindemann, J; Hoffmann, T; Koehl, A; Walz, E M; Sommer, F

    2017-06-01

    Nasal geometries and temperature of the nasal mucosa are the primary factors affecting nasal air conditioning. Data on intranasal air conditioning after provoking the trigeminal nerve with a cold stimulus simulating the effects of an arctic condition is still missing. The objective was to investigate the influence of skin cooling face masks on nasal air conditioning, mucosal temperature and nasal geometry. Standardized in vivo measurements of intranasal air temperature, humidity and mucosal temperature were performed in 55 healthy subjects at defined detection sites before and after wearing a cooling face mask. Measurements of skin temperature, rhinomanometry and acoustic rhinometry were accomplished. After wearing the face mask the facial skin temperature was significantly reduced. Intranasal air temperature did not change. Absolute humidity and mucosal temperature increased significantly. The acoustic rhinometric results showed a significant increase of the volumes and the cross-sectional areas. There was no change in nasal airflow. Nasal mucosal temperature, humidity of inhaled air, and volume of the anterior nose increased after application of a cold face mask. The response is mediated by the trigeminal nerve. Increased mucosal temperatures as well as changes in nasal geometries seem to guarantee sufficient steady intranasal nasal air conditioning.

  14. Perceiving nasal patency through mucosal cooling rather than air temperature or nasal resistance.

    Directory of Open Access Journals (Sweden)

    Kai Zhao

    Full Text Available Adequate perception of nasal airflow (i.e., nasal patency is an important consideration for patients with nasal sinus diseases. The perception of a lack of nasal patency becomes the primary symptom that drives these patients to seek medical treatment. However, clinical assessment of nasal patency remains a challenge because we lack objective measurements that correlate well with what patients perceive. The current study examined factors that may influence perceived patency, including air temperature, humidity, mucosal cooling, nasal resistance, and trigeminal sensitivity. Forty-four healthy subjects rated nasal patency while sampling air from three facial exposure boxes that were ventilated with untreated room air, cold air, and dry air, respectively. In all conditions, air temperature and relative humidity inside each box were recorded with sensors connected to a computer. Nasal resistance and minimum airway cross-sectional area (MCA were measured using rhinomanometry and acoustic rhinometry, respectively. General trigeminal sensitivity was assessed through lateralization thresholds to butanol. No significant correlation was found between perceived patency and nasal resistance or MCA. In contrast, air temperature, humidity, and butanol threshold combined significantly contributed to the ratings of patency, with mucosal cooling (heat loss being the most heavily weighted predictor. Air humidity significantly influences perceived patency, suggesting that mucosal cooling rather than air temperature alone provides the trigeminal sensation that results in perception of patency. The dynamic cooling between the airstream and the mucosal wall may be quantified experimentally or computationally and could potentially lead to a new clinical evaluation tool.

  15. Nasal Mucociliary Transport Before and After Jogging.

    Science.gov (United States)

    Cederlund, Anna; And Others

    1987-01-01

    A study of nasal mucociliary transport in 11 healthy subjects before and after they jogged 8-10 kilometers indicated that the transport time was significantly longer after jogging than before jogging. (Author/CB)

  16. Radiological changes and complications associated with nasal ...

    African Journals Online (AJOL)

    Radiological changes and complications associated with nasal polyposis. *A.().A. Ogunleye and ... polyposis patients seen at the department of Otorhin0- llaryngology of .... Long-standing nasasl polyps can enlarge to such a degree that they ...

  17. Nasal septal teratoma in a child

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    Akinyemi Oluwole A

    2007-05-01

    Full Text Available Abstract Background Teratoma is a rare developmental neoplasm that arises from totipotential tumor stem cells. Head and neck teratomas constitute about 10% of all cases. Only two cases of mature teratoma of the nasal septum have previously been documented in the world literature. Case presentation We present a case of histologically confirmed mature teratoma arising from the nasal septum in an eighteen month old Nigerian female who presented with a history of noisy breathing associated with recurrent rhinorrhea since birth. Physical examination revealed obstruction of the right nasal cavity by a pale fleshy mass. She underwent a total surgical excision and to date, after thirty one months follow-up, she is free from recurrence. Conclusion The prognosis for benign teratoma of the nasal septum is good following total surgical excision.

  18. Effect of bilastine upon nasal obstruction.

    Science.gov (United States)

    Dávila, I; Sastre, J; Mullol, J; Montoro, J; Jáuregui, I; Ferrer, M; del Cuvillo, A; Bartra, J; Valero, A

    2011-01-01

    H1 antihistamines constitute one of the main references for the treatment of allergic rhinitis. Classically, these drugs have been considered effective in controlling sneezing, rhinorrhea and itching, though they have not been regarded as particularly effective in application to nasal obstruction. The most recent studies, involving second-generation H1 antihistamines (desloratadine, fexofenadine, levocetirizine, rupatadine), have shown these drugs to offer effects upon nasal obstruction significantly superior to those of placebo. The present review examines the effect of bilastine, a new, potent and highly specific H1 antihistamine without sedative effects or cardiac toxicity, upon nasal obstruction. The analysis of the data from the different clinical trials indicates that in patients with allergic rhinitis, the effect of bilastine upon nasal obstruction is superior to that of placebo and similar to that of other second-generation H1 antihistamines, manifesting within 24 hours after the start of treatment.

  19. Unilateral nasal pain with migraine features.

    Science.gov (United States)

    Alvarez, Mónica; Montojo, Teresa; de la Casa, Beatriz; Vela, Lydia; Pareja, Juan A

    2013-09-01

    Migraine attacks exclusively felt in the face are very rare, the pain involving the territories supplied by the second and third branches of the trigeminal nerve. Two patients suffering from heminasal pain attacks accompanied with typical migrainous features and responsive to oral or intranasal triptans - but not to intranasal lidocaine or oxymetazoline. In one patient, the attacks could be precipitated upon slight touching on the tip of the nose, in the other attacks were preceded by the nasal sensation typically heralding sneezing. Migraine pain mostly develops within the innervation territory of the first branch of the trigeminal nerve, which includes the nose. Therefore, episodes of unilateral nasal pain with migrainous features could be considered a migraine with unusual topography (nasal migraine). Painful nasal attacks occasionally preceded by stimulation of trigeminal afferents in the nose, could be conceived of as migraine-tic syndrome.

  20. Development of the cetacean nasal skull.

    Science.gov (United States)

    Klima, M

    1999-01-01

    The adaptation of cetaceans to aquatic life habits is reflected, in their nasal region, in three marked changes from the original relations found in land mammals. These changes include (1) the loss of the sense of smell, (2) translocation of the nostrils from the tip of the rostrum to the vertex of the head, and (3) elongation of the anterior head to form a rostrum protruding far towards anterior. The morphogenetic processes taking place during embryogenesis of the nasal skull play a decisive part in the development of all these changes. The lateral parts of the embryonic nasal capsule, encompassing the nasal passages, change their position from horizontal to vertical. At the same time, the structures of the original nasal floor (the solum nasi) are shifted in front of the nasal passages towards the rostrum. The structures of the original nasal roof (the tectum nasi) and of the nasal side wall (the paries nasi) are translocated behind the nasal passages towards the neurocranium. The medial nasal septum (the septum nasi) mostly loses its connection to the nasal passages and is produced into a point protruding far towards anterior. The transformed embryonic nasal skull of the Cetacea can be divided into three sections: 1. The median structures. These include the cartilaginous structures, viz., the rostrum nasi, the septum interorbitale and the spina mesethmoidalis, which are accompanied by the dermal bones, the vomer and the praemaxillare. In adult cetaceans the rostrum nasi is mostly preserved as a robust cartilage of the skull, which may possibly serve as a sound transmitting structure of the sonar system, or it may be responsible for the sensing of water streams and vibrations. 2. The posterior side wall structures. These include the following cartilaginous structures that are mostly heavily reduced or mutually fused: the cupula nasi anterior, the tectum nasi, the lamina cribrosa, the paries nasi, the commissura orbitonasalis, the cupula nasi posterior, the

  1. Local Nasal Specific Immunotherapy for Allergic Rhinitis

    Directory of Open Access Journals (Sweden)

    Passalacqua Giovanni

    2006-09-01

    Full Text Available Abstract The possibility of producing local hyposensitization by administering allergens via mucosal routes was envisaged at the beginning of 1900, and local nasal immunotherapy has been extensively studied since the 1970s. Presently, there are 21 randomized controlled trials being conducted with the most common allergens, consistently showing the clinical efficacy of local nasal immunotherapy for rhinitis. Other advantages are that it has an optimal safety profile and can be self-administered at home by the patient. Moreover, there are several data from animal models and from humans that confirm the immunomodulatory effect of intranasally administered antigens. On the other hand, local nasal immunotherapy seems to be effective only on rhinitis symptoms and requires a particular technique of administration. For these reasons, its clinical use is progressively declining in favour of the sublingual route although nasal immunotherapy is validated in official documents and remains a viable alternative to injection.

  2. Primary nasal tuberculosis: a case report.

    Science.gov (United States)

    Nayar, Ravi C; Al Kaabi, Juma; Ghorpade, Kanchanmala

    2004-03-01

    During the past 2 decades, tuberculosis--both pulmonary and extrapulmonary--has re-emerged as a major health problem worldwide. Nasal tuberculosis--either primary or secondary to pulmonary tuberculosis or facial lupus--is rare, but it should be considered in the differential diagnosis of nasal granulomas. We describe a case of primary nasal tuberculosis in an adult male who presented with a polypoid lesion in one nasal cavity. The diagnosis was based on histopathology and the patient's successful response to antituberculous drug treatment. Given the rising incidence of tuberculosis, it is prudent that otolaryngologists remain cognizant of this infection as a potential cause of unusual lesions in the head and neck.

  3. Numerical simulation and nasal air-conditioning

    Directory of Open Access Journals (Sweden)

    Keck, Tilman

    2010-01-01

    Full Text Available Heating and humidification of the respiratory air are the main functions of the nasal airways in addition to cleansing and olfaction. Optimal nasal air conditioning is mandatory for an ideal pulmonary gas exchange in order to avoid desiccation and adhesion of the alveolar capillary bed. The complex three-dimensional anatomical structure of the nose makes it impossible to perform detailed in vivo studies on intranasal heating and humidification within the entire nasal airways applying various technical set-ups. The main problem of in vivo temperature and humidity measurements is a poor spatial and time resolution. Therefore, in vivo measurements are feasible only to a restricted extent, solely providing single temperature values as the complete nose is not entirely accessible. Therefore, data on the overall performance of the nose are only based on one single measurement within each nasal segment. In vivo measurements within the entire nose are not feasible. These serious technical issues concerning in vivo measurements led to a large number of numerical simulation projects in the last few years providing novel information about the complex functions of the nasal airways. In general, numerical simulations merely calculate predictions in a computational model, e.g. a realistic nose model, depending on the setting of the boundary conditions. Therefore, numerical simulations achieve only approximations of a possible real situation. The aim of this review is the synopsis of the technical expertise on the field of in vivo nasal air conditioning, the novel information of numerical simulations and the current state of knowledge on the influence of nasal and sinus surgery on nasal air conditioning.

  4. Open safety pin in the nasal cavity.

    Science.gov (United States)

    Sen, I; Sikder, B; Sinha, R; Paul, R

    2004-04-01

    Foreign bodies in the nasal cavity are common-day occurrences in Otolaryngologic practice. But an open safety pin in nose with it' s sharp end directed towards roof is a rare incidence, and available literature is silent about this presentation; it is probably, the first of it' s kind being reported. Two cases of safety pins inside the nasal cavity, one open and the other closed, have been presented here with a brief review of literature.

  5. Open safety pin in the nasal cavity

    OpenAIRE

    Sen, I; Sikder, B.; R. Sinha; Paul, R

    2004-01-01

    Foreign bodies in the nasal cavity are common-day occurrences in Otolaryngologic practice. But an open safety pin in nose with it’ s sharp end directed towards roof is a rare incidence, and available literature is silent about this presentation; it is probably, the first of it’ s kind being reported. Two cases of safety pins inside the nasal cavity, one open and the other closed, have been presented here with a brief review of literature.

  6. [Nasal and pulmonary flora in the goat].

    Science.gov (United States)

    Richard, Y; Borges, E; Favier, C; Oudar, J

    1989-01-01

    On the basis of bacteriological examinations carried out on 75 intranasal swabs and 80 goat lung punctures, aerobic, aero-anaerobic respiratory microbes and mycoplasma were studied. Mycoplasma ovipneumoniae was isolated both from nasal flora (37%) and from the lungs (27.5%) as well as Pasteurella spp which accounted respectively for 24% and 12.5%. The nasal flora are characterised by the presence of a Gram-negative strain included in the genus Moraxella and connected with Moraxella bovis species.

  7. Pharmacology of Nasal Medications: An Update

    OpenAIRE

    Martin, G. F.

    1988-01-01

    The author of this article reviews the pharmacology of nasal medication, focusing on the indications and side-effects. The newer group of non-sedating antihistamines proves to be a useful supplement to disodium cromoglycate and the traditional antihistamines in the treatment of allergic rhinitis. The topical steroids (flunisolide and beclomethasone dipropionate) did not produce a significant incidence of adrenal suppression, mucosal atrophy, or nasal candidiasis. The anticholinergic ipatropiu...

  8. Oral and nasal microbiota in Parkinson's disease.

    Science.gov (United States)

    Pereira, Pedro A B; Aho, Velma T E; Paulin, Lars; Pekkonen, Eero; Auvinen, Petri; Scheperjans, Filip

    2017-05-01

    Parkinson's disease (PD) is associated with neuropathological changes in olfactory and gastrointestinal tissues, and PD patients frequently suffer from hyposmia, hyposalivation, and dysphagia. Since hyposmia and gastrointestinal dysfunction are frequently premotor symptoms, it has been speculated that an external, for example microbial, agent could trigger the pathologic process in the corresponding organs, subsequently spreading to the central nervous system. We recently showed evidence for compositional differences between the fecal microbiota of PD patients and control subjects. In this study, our objective was to explore a possible connection between nasal and oral microbiota and PD. We compared the oral and nasal bacterial communities of PD patients (oral: n = 72, nasal: n = 69) and control subjects (oral: n = 76, nasal: n = 67) using a 16S rRNA gene amplicon sequencing approach. Oral and nasal microbiota differed markedly from each other, with no notable similarity within subjects. Oral microbiota of PD patients and control subjects had differences in beta diversity and abundances of individual bacterial taxa. An increase in the abundance of opportunistic oral pathogens was detected in males, both with and without PD. Our data did not reveal convincing differences between the nasal microbiota of control subjects and PD patients. The oral microbiome deserves additional research regarding its connection to PD and its biomarker potential. The higher abundance of oral pathogens in men underlines the importance of monitoring and promoting male dental health. Copyright © 2017 Elsevier Ltd. All rights reserved.

  9. NASALIZATION IN BRAZILIAN PORTUGUESE: AN AUTOSEGMENTAL (REVIEW

    Directory of Open Access Journals (Sweden)

    Consuelo de Paiva Godinho COSTA

    2015-06-01

    Full Text Available We propose to make a brief review on nasalization phenomena studies in Portuguese, aiming the phonological process of nasal harmonization that occurs in the variety of Brazilian Portuguese spoken in Vitória da Conquista-BA and region, a phenomenon hitherto not described for any Portuguese dialect. To do so, we consider as fundamental, D’Angelis (2002 analysis, which incorporates relevant concepts presented by Trubetzkoy, from the Prague School, and some points of Camara Jr. propose. We also propose to update the discussion with the approaches along the lines of auto segmental phonology, incorporating some insights of Piggott (1992, discussing with other analyzes for nasalization phenomena in other languages, especially Guarani (language of Tupi-Guarani Linguistic Family, as proposed by Costa (2010, which deals with the phonological processes involving nasality and nasal harmony in Brazilian indigenous languages , in order to verify if the researches on nasality phenomena in other languages can shed some light on the processes that occur in Portuguese.

  10. Correlations of nasal responses to leukotriene D4 and histamine nasal provocation with quality of life in allergic rhinitis

    Science.gov (United States)

    Zhu, Zheng; Xie, Yanqing; Guan, Weijie; Gao, Yi; Xia, Shu; Shi, Xu

    2016-01-01

    Background The symptoms of allergic rhinitis (AR) greatly affect the quality of life (QoL) in the patients with AR. The correlations of nasal response to leukotriene D4 (LTD4) and histamine nasal provocation with health related QoL in AR are not clear. Objective To evaluate the correlations of nasal response to LTD4 and histamine nasal challenge with QoL in AR. Methods Patients randomly underwent LTD4 and histamine nasal challenge tests, completed the rhinoconjunctivitis quality of life questionnaire (RQoLQ), and rating the symptom severity score (total symptom score 4, TSS4) in the previous week. The correlations between nasal challenge tests induced nasal responses and QoL in RQoLQ were analyzed. Results A total of 25 eligible AR patients enrolled and finished both LTD4 and histamine nasal challenge and completed the questionnaire of RQoLQ. Histamine nasal challenge induced sneezing, increased nasal resistant were correlated with most of the dimensions (general, practical, nasal, eye problems, and quality of sleep, p < 0.05), while LTD4 nasal challenge induced sneeze, increased nasal resistant only correlated with nasal and ocular problems. On the contrary, the severity of the sneeze assessed by TSS4, was not correlated with QoL, while the severity of rhinorrhea, congestion, and nasal pruritus were correlated with nasal and practical problems, and nasal congestion was also correlated with ocular problems (r = 0.60, p = 0.01). Conclusion LTD4 and histamine nasal challenge induced nasal responses were correlated with different clinical symptoms severity and QoL, which can be used as a good diagnosis and evaluation methods for the management of AR.

  11. Nasal meatus plasty: a contribution to plastic reconstruction of the nasal valve during midfacial degloving

    Directory of Open Access Journals (Sweden)

    Lorenz, Kai J.

    2014-05-01

    Full Text Available Midfacial degloving is a proven method for easily accessing the midface, the nasal pyramid, the maxillary and ethmoidal sinuses, the orbits, as well as the anterior skull base. Indications for this method of access mainly include tumour resections in the area of the midface, the septum, the maxillary sinus, the paranasal to the sphenoidal sinus as well as the clivus. In addition, this method of access allows for the exposure of the bony structures of the midface in the event of extensive fractures.In general, this method of access combines an incision in the oral vestibule and circular incisions in the nasal vestibule area in order to release the nasal pyramid.After removing the facial wall of the maxillary sinus, extensive exposure of the surgical site is possible.One disadvantage of this method of access is the difficult reconstruction of the nasal valve area, which often leads to cicatricial stenoses and difficulties with breathing through the nose. Furthermore, wound healing problems and osteoradionecrosis in the area of the lateral margin of the anterior nasal aperture after replantation of the facial wall of the maxillary sinus have been described, because in this area sufficient soft tissue coverage cannot be ensured when a conventional technique is used.We describe a soft tissue flap pedicled in the cranial and caudal directions in the nasal valve area which makes both the reconstruction of the nasal vestibule and sufficient soft tissue coverage of the anterior nasal aperture possible.

  12. Válvula nasal: anatomia e fisiologia Nasal valve: anatomy and physiology

    Directory of Open Access Journals (Sweden)

    Carlos Eduardo Nazareth Nigro

    2009-04-01

    Full Text Available A porção anterior das cavidades nasais, da narina à válvula nasal (VN, é a região de maior resistência nasal ao fluxo aerífero, de suma importância para a fisiologia nasal. Na literatura existem terminologias diferentes para se referir às mesmas estruturas anatômicas e, ainda, o mesmo termo se referindo a estruturas anatômicas diferentes. OBJETIVO: Realizamos este trabalho com o objetivo de revisarmos o funcionamento da VN e definirmos com mais clareza estruturas anatômicas da porção anterior das cavidades nasais, principalmente a região da VN. CONCLUSÃO: Existe controvérsia na literatura quanto à nomenclatura das estruturas da VN. Neste trabalho definimos VN como uma estrutura tridimensional compreendida anteriormente pelo ostium internum e posteriormente pelo isthmus nasi.The anterior portion of the nasal cavities, from the nostril to the nasal valve (NV, is the place of highest nasal resistance to airflow, paramount to nasal physiology. There are different terminologies for the same anatomic structures in the literature. AIM: The aim of this paper was to study the NV function and define clearly the structures of the anterior portion of the nasal cavities, mainly the region of the NV. CONCLUSION: Internum ostium is the anterior segment and isthmus nasi is the posterior segment of the NV region.

  13. A tomografia de córnea e segmento anterior na propedêutica do exame complementar na avaliação de ectasia

    OpenAIRE

    Bruno de Freitas Valbon; Rodrigo Teixeira Santos; Isaac Ramos; Ana Laura Canedo; Leonardo Nogueira; Renato Ambrósio Jr

    2013-01-01

    Descrevemos a importância da tomografia de córnea e segmento anterior na propedêutica do exame complementar na avaliação de ectasia. Esta descrição da interpretação clínica dos índices da tomografia de córnea e segmento anterior (Pentacam - Oculus, Wetzlar, Germany) neste relato de caso, demonstra a relevância de uma nova tecnologia na avaliação da córnea e segmento anterior na suspeita de ceratocone. O diagnóstico de ceratocone foi excluído pela análise dos índices tomográficos de ectasia. D...

  14. Triclosan promotes Staphylococcus aureus nasal colonization.

    Science.gov (United States)

    Syed, Adnan K; Ghosh, Sudeshna; Love, Nancy G; Boles, Blaise R

    2014-04-08

    The biocide triclosan is used in many personal care products, including toothpastes, soaps, clothing, and medical equipment. Consequently, it is present as a contaminant in the environment and has been detected in some human fluids, including serum, urine, and milk. Staphylococcus aureus is an opportunistic pathogen that colonizes the noses and throats of approximately 30% of the population. Colonization with S. aureus is known to be a risk factor for several types of infection. Here we demonstrate that triclosan is commonly found in the nasal secretions of healthy adults and the presence of triclosan trends positively with nasal colonization by S. aureus. We demonstrate that triclosan can promote the binding of S. aureus to host proteins such as collagen, fibronectin, and keratin, as well as inanimate surfaces such as plastic and glass. Lastly, triclosan-exposed rats are more susceptible to nasal colonization with S. aureus. These data reveal a novel factor that influences the ability of S. aureus to bind surfaces and alters S. aureus nasal colonization. IMPORTANCE Triclosan has been used as a biocide for over 40 years, but the broader effects that it has on the human microbiome have not been investigated. We demonstrate that triclosan is present in nasal secretions of a large portion of a test population and its presence correlates with Staphylococcus aureus nasal colonization. Triclosan also promotes the binding of S. aureus to human proteins and increases the susceptibility of rats to nasal colonization by S. aureus. These findings are significant because S. aureus colonization is a known risk factor for the development of several types of infections. Our data demonstrate the unintended consequences of unregulated triclosan use and contribute to the growing body of research demonstrating inadvertent effects of triclosan on the environment and human health.

  15. Development of a physiologically relevant dripping analytical method using simulated nasal mucus for nasal spray formulation analysis

    Directory of Open Access Journals (Sweden)

    Tina Masiuk

    2016-10-01

    Full Text Available Current methods for nasal spray formulations have been elementary evaluating the dripping characteristics of a formulation and have not assessed the behavior of the nasal formulation in the presence of varying types of mucus depending on the indication or diseased state. This research investigated the effects of nasal mucus on the dripping behavior of nasal formulations and focused on developing an improved in vitro analytical test method that is more physiologically relevant in characterizing nasal formulation dripping behavior. Method development was performed using simulated nasal mucus preparations for both healthy and diseased states as coatings for the dripping experiment representing a wide range of viscosity. Factors evaluated during development of this in vitro test method included amount of mucus, application of mucus, drying times, and compatibility of the mucus on a C18 Thin Layer Chromatography (TLC substrate. The dripping behavior of nasal formulations containing a range of 1% Avicel to 3.5% Avicel was assessed by actuating the nasal spray on a perpendicular TLC plate coated with either healthy or diseased simulated nasal mucus. After actuation of the nasal spray, the dripping of the formulation on the coated TLC plate was measured after the plate was repositioned vertically. The method that was developed generated reproducible results on the dripping behavior of nasal formulations and provided critical information about the compatibility of the formulation with the nasal mucus for different diseased states, aiding in nasal spray formulation development and physical characterization of the nasal spray.

  16. Development of a physiologically relevant dripping analytical method using simulated nasal mucus for nasal spray formulation analysis$

    Institute of Scientific and Technical Information of China (English)

    Tina Masiuk n; Parul Kadakia; Zhenyu Wang

    2016-01-01

    Current methods for nasal spray formulations have been elementary evaluating the dripping char-acteristics of a formulation and have not assessed the behavior of the nasal formulation in the presence of varying types of mucus depending on the indication or diseased state. This research investigated the effects of nasal mucus on the dripping behavior of nasal formulations and focused on developing an improved in vitro analytical test method that is more physiologically relevant in characterizing nasal formulation dripping behavior. Method development was performed using simulated nasal mucus preparations for both healthy and diseased states as coatings for the dripping experiment representing a wide range of viscosity. Factors evaluated during development of this in vitro test method included amount of mucus, application of mucus, drying times, and compatibility of the mucus on a C18 Thin Layer Chromatography (TLC) substrate. The dripping behavior of nasal formulations containing a range of 1%Avicel to 3.5%Avicel was assessed by actuating the nasal spray on a perpendicular TLC plate coated with either healthy or diseased simulated nasal mucus. After actuation of the nasal spray, the dripping of the formulation on the coated TLC plate was measured after the plate was repositioned vertically. The method that was developed generated reproducible results on the dripping behavior of nasal formula-tions and provided critical information about the compatibility of the formulation with the nasal mucus for different diseased states, aiding in nasal spray formulation development and physical characterization of the nasal spray.

  17. Estudo comparativo da eletrocardiografia convencional e computadorizada em equinos das raças Quarto de Milha e Mangalarga Marchador

    Directory of Open Access Journals (Sweden)

    M.A. Lázaro

    2015-08-01

    Full Text Available A eletrocardiografia computadorizada é mais precisa e prática quando comparada à convencional e por essa razão vem ganhando espaço na rotina clínica. No entanto os valores de referência devem diferir para os dois métodos. O objetivo desse trabalho foi analisar e comparar o exame eletrocardiográfico computadorizado com o exame obtido pelo método convencional em equinos. O estudo demonstrou diferenças na amplitude da onda P (P<0,0001 com valor médio de 0,21 mV para o método convencional e 0,17 mV para o computadorizado; duração do intervalo PR (p=0,0005, tendo o valor médio de 260,49 ms para o método convencional e 242,37 ms para o informatizado e duração do complexo QRS (p=0,0003, sendo a média de valores para o método convencional de 75,61ms e 84,83 ms para o computadorizado. Essas diferenças devem ser levadas em consideração com o intuito de evitar equívocos na interpretação da eletrocardiografia na espécie equina.

  18. Silver nasal sprays: misleading Internet marketing.

    Science.gov (United States)

    Gaslin, Michael T; Rubin, Cory; Pribitkin, Edmund A

    2008-04-01

    Long-term use of silver-containing products is associated with a permanent bluish-gray discoloration of the skin known as argyria, but they remain widely available despite several measures by the FDA to regulate them. Several recent case reports have described the occurrence of argyria as a result of using these "natural" products. We used the five most common Internet search engines to find Web sites providing information on silver-containing nasal sprays. Of 49 Web sites analyzed, only 2 (4%) mentioned argyria as a possible complication, although 30 (61%) did caution against long-term use. Eight sites (16%) made specific claims about the health benefits of the product. All 49 sites (100%) provided direct or indirect links to buy silver-containing nasal sprays. We conclude that information about silver-containing nasal sprays on the Internet is misleading and inaccurate. Therefore, otolaryngologists should be aware of the misinformation their patients may be receiving about these products.

  19. Discriminating between Nasal and Mouth Breathing

    CERN Document Server

    Curran, Kevin; Coyle, Damian

    2010-01-01

    The recommendation to change breathing patterns from the mouth to the nose can have a significantly positive impact upon the general well being of the individual. We classify nasal and mouth breathing by using an acoustic sensor and intelligent signal processing techniques. The overall purpose is to investigate the possibility of identifying the differences in patterns between nasal and mouth breathing in order to integrate this information into a decision support system which will form the basis of a patient monitoring and motivational feedback system to recommend the change from mouth to nasal breathing. Our findings show that the breath pattern can be discriminated in certain places of the body both by visual spectrum analysis and with a Back Propagation neural network classifier. The sound file recoded from the sensor placed on the hollow in the neck shows the most promising accuracy which is as high as 90%.

  20. Nasal birth trauma: a review of appropriate treatment.

    LENUS (Irish Health Repository)

    Cashman, E C

    2012-02-01

    The aetiology of nasal deformity has frequently included birth trauma. There is no consensus in the literature as to whether nasal surgery, in the form of closed reduction, is indicated in neonates. The majority of studies in the literature that advocate intervention have inadequate followup periods and there is a paucity of evidence for the adverse effects of conservative management. This case highlights the therapeutic dilemma posed by such nasal injuries in the neonate and, to the best of the authors\\' knowledge, at the time of writing, represents the earliest reported case in the literature of nasal deformity in the neonate. The term nasal deformity is used to denote deformity of the nasal pyramid, soft tissue, and septum. Three main aspects of neonatal nasal deformity are addressed including, firstly, if nasal deformity at birth needs to be addressed, secondly, if left unaltered, what the long-term effects are and, finally, if intervention alters the normal course of midfacial development.

  1. Nanoparticles for nasal delivery of vaccines : monitoring adaptive immune responses

    NARCIS (Netherlands)

    Keijzer, C.

    2013-01-01

    The continuous emergence of new pathogens and growing drug resistance of microorganisms asks for innovative vaccination strategies. An alternative to conventional multiple injection vaccines is the nasal route of vaccine delivery. The immune response induced following nasal antigen delivery depends

  2. PHONETIC EVIDENCE FOR THE NASAL CODA SHIFT IN MANDARIN

    Directory of Open Access Journals (Sweden)

    James H. Yang

    2010-06-01

    Full Text Available This paper presented phonetic evidence to resolve the transcription disagreement concerning the syllable-final nasal shift in the variety of Mandarin spoken in Taiwan. Although three judges agreed that the rhyme /iŋ/ underwent a sound change, they perceived the nasal coda shift differently. Two of them transcribed it as a modification from /iŋ/ to /in/, whereas the other asserted that the velar nasal disappears with its preceding vowel nasalized. In order to resolve this transcription conflict, this study analyzed the acoustic attributes of the speculative sound alterations in question, including /in/, /iŋ/, /i/ and /ĩ/. The phonetic analysis indicated that the Taiwanese participants did not nasalize the preceding vowel deleting the nasal coda but tended to pronounce the post-vocalic velar nasal as its dental counterpart. This study concluded by discussing the implications of the synchronic variation for the theories of the nasal coda shift in Chinese dialects.

  3. Nasal Birth Trauma: A Review of Appropriate Treatment

    Directory of Open Access Journals (Sweden)

    E. C. Cashman

    2010-01-01

    Full Text Available The aetiology of nasal deformity has frequently included birth trauma. There is no consensus in the literature as to whether nasal surgery, in the form of closed reduction, is indicated in neonates. The majority of studies in the literature that advocate intervention have inadequate followup periods and there is a paucity of evidence for the adverse effects of conservative management. This case highlights the therapeutic dilemma posed by such nasal injuries in the neonate and, to the best of the authors' knowledge, at the time of writing, represents the earliest reported case in the literature of nasal deformity in the neonate. The term nasal deformity is used to denote deformity of the nasal pyramid, soft tissue, and septum. Three main aspects of neonatal nasal deformity are addressed including, firstly, if nasal deformity at birth needs to be addressed, secondly, if left unaltered, what the long-term effects are and, finally, if intervention alters the normal course of midfacial development.

  4. Tomografia de coerência óptica na commotio retinae: relato de caso Optical coherence tomography imaging in commotio retinae: case report

    Directory of Open Access Journals (Sweden)

    Celso Morita

    2009-08-01

    Full Text Available O objetivo deste relato é correlacionar achados à tomografia de coerência óptica e prognóstico visual de pacientes com commotio retina e de gravidades diferentes. Dois pacientes do sexo masculino, de 20 e 23 anos com baixa visual unilateral após trauma ocular contuso atribuível a edema de Berlin foram avaliados pela retinografia e tomografia de coerência óptica. A acuidade visual no olho afetado era de 20/25 no primeiro paciente e conta dedos a 2 metros no segundo. O exame oftalmológico revelou uveíte traumática e, na fundoscopia, evidenciaram-se opacificação retiniana moderada no primeiro caso e grave no segundo. A tomografia de coerência óptica confirmou discreta diminuição da depressão foveal no primeiro caso e desorganização das camadas retinianas no segundo. Houve resolução anatômica e funcional completa a tomografia de coerência óptica no primeiro paciente, enquanto o segundo evoluiu com baixa visual permanente e desorganização da arquitetura retiniana. A tomografia de coerência óptica é um exame complementar útil na avaliação do trauma retiniano, ajudando a entender sua fisiopatologia e predizer prognóstico a partir da análise anatômica da região acometida.The purpose of this case report was to correlate optical coherence tomography findings and visual outcomes of patients with different degrees of commotio retinae. A 20-year-old male and a 23-year-old male that presented with decreased vision due to Berlin's edema after blunt ocular trauma were evaluated by optical coherence tomography and retinography. The visual acuity in the affected eye was 20/25 in the first patient and counting fingers in the second one. The ophthalmic examination showed traumatic uveitis and fundoscopy revealed mild retinal opacification in the first case and severe opacification in the latter. The optical coherence tomography confirmed the reduction of foveal depression on the first case and the disarrangement of all retinal

  5. Bilateral Nasoalveolar Cyst Causing Nasal Obstruction

    Directory of Open Access Journals (Sweden)

    Uzeyir Yildizoglu

    2016-01-01

    Full Text Available Nasoalveolar cysts, which originate from epithelial remnants of nasolacrimal duct, are nonodontogenic soft tissue lesions of the upper jaw. These cysts are thought to be developmental and are presented with fullness in the upper lip and nose, swelling on the palate, and sometimes nasal obstruction. Because of cosmetic problems, they are often diagnosed at an early stage. These lesions are mostly revealed unilaterally but also can be seen on both sides. In this case report, a patient who complained of nasal obstruction and then diagnosed with bilateral nasoalveolar cysts and treated by sublabial excision is presented and clinical features and treatment approaches are discussed with the review of literature.

  6. Bilateral Nasoalveolar Cyst Causing Nasal Obstruction

    Science.gov (United States)

    Yildizoglu, Uzeyir; Polat, Bahtiyar; Durmaz, Abdullah

    2016-01-01

    Nasoalveolar cysts, which originate from epithelial remnants of nasolacrimal duct, are nonodontogenic soft tissue lesions of the upper jaw. These cysts are thought to be developmental and are presented with fullness in the upper lip and nose, swelling on the palate, and sometimes nasal obstruction. Because of cosmetic problems, they are often diagnosed at an early stage. These lesions are mostly revealed unilaterally but also can be seen on both sides. In this case report, a patient who complained of nasal obstruction and then diagnosed with bilateral nasoalveolar cysts and treated by sublabial excision is presented and clinical features and treatment approaches are discussed with the review of literature. PMID:27980871

  7. The Fungi Flora of Healthy Nasal Mucosa in Kerman, Iran

    OpenAIRE

    2011-01-01

    Introduction: Environmental fungi, molds and yeasts, can infest the nasal cavity through inhaled air. There is some evidence that they could be the main cause of Chronic Rhinosinusitis (CRS) but little is known about the normal fungal flora in the human nose. The objective of this study was to assess the normal fungal flora of the nasal mucus in adults in Kerman. Materials and Methods: We conducted a cross sectional study. Nasal swabs were used to sample the nasal cavity of 100 a...

  8. STRATEGIES AND PROSPECTS OF NASAL DRUG DELIVERY SYSTEMS

    OpenAIRE

    Gannu Praveen Kumar

    2012-01-01

    The recent advancement of nasal drug delivery systems has increased enormously and is gaining significant importance. Intranasal therapy has been an accepted form of treatment in the Ayurvedic system of Indian Medicine. The non-invasive delivery of nasal drug delivery systems made to exploit for the development of successful treatment. The advantages, disadvantages, mechanism of action and application of nasal drug delivery system in local delivery, systematic delivery, nasal vaccines and CNS...

  9. Intraosseous hemangioma of the nasal septum: A case report

    Energy Technology Data Exchange (ETDEWEB)

    Park, Min Ho; Kim, Eui Jong; Jang, Ji Hye; Lee, Kyung Mi; Choi, Woo Suk; Kim, Sung Wan; Kim, Yoon Hwa [Kyung Hee University Hospital, Seoul (Korea, Republic of)

    2015-08-15

    Hemangioma can arise in the soft tissues and bone of the nasal cavity. However, to the best of our knowledge, there are no prior case reports presenting intraosseous hemangioma of the nasal septum. Intraosseous hemangioma, in addition to a chondroid tumor, should be included in the differential diagnosis of a calcified mass of the nasal cavity. In the present report, we present a case of an intraosseous cavernous hemangioma in the nasal bony septum of a 53-year-old woman.

  10. Análise quantitativa do tratamento da escoliose idiopática com o método klapp por meio da biofotogrametria computadorizada

    OpenAIRE

    Iunes, Denise H.; Maria B. B. Cecílio; Marina A. Dozza; Almeida,Polyanna R.

    2010-01-01

    INTRODUÇÃO: Poucos trabalhos comprovam a eficácia das técnicas fisioterapêuticas para o tratamento da escoliose. OBJETIVO: Analisar a eficácia do Método Klapp no tratamento das escolioses por meio do estudo quantitativo pela biofotogrametria computadorizada. MÉTODOS: Dezesseis indivíduos com média de idade de 15±2,61 anos, portadores de escoliose idiopática, foram tratados com o método Klapp. Para análise dos resultados do tratamento, todos foram fotografados antes e após o tratamento, seguin...

  11. The NOFLO trial: low-flow nasal prongs therapy in weaning nasal continuous positive airway pressure in preterm infants.

    LENUS (Irish Health Repository)

    O'Donnell, Sinéad M

    2013-07-01

    To determine if low-flow nasal prongs therapy with room air, compared with no treatment, facilitates weaning from nasal continuous positive airway pressure (NCPAP) in very low birth weight (VLBW, birth weight <1500 g) infants.

  12. Underlying Phoneme Velar Nasal with Lip Rounding in Hueyapan Nahuatl

    Science.gov (United States)

    Campbell, R. Joe

    1976-01-01

    Reasons are given for the idea that Hueyapan (Morelos) Nahuatl has an underlying velar nasal with lip rounding phoneme which never has the surface reflex of a rounded velar nasal allophone, but occurs phonetically as a velar nasal allophone or a labial dental voiced allophone or disappears. (SCC)

  13. Underlying Phoneme Velar Nasal with Lip Rounding in Hueyapan Nahuatl

    Science.gov (United States)

    Campbell, R. Joe

    1976-01-01

    Reasons are given for the idea that Hueyapan (Morelos) Nahuatl has an underlying velar nasal with lip rounding phoneme which never has the surface reflex of a rounded velar nasal allophone, but occurs phonetically as a velar nasal allophone or a labial dental voiced allophone or disappears. (SCC)

  14. Staphylococcus aureus and the ecology of the nasal microbiome

    DEFF Research Database (Denmark)

    Liu, Cindy M; Price, Lance B; Hungate, Bruce A

    2015-01-01

    The human microbiome can play a key role in host susceptibility to pathogens, including in the nasal cavity, a site favored by Staphylococcus aureus. However, what determines our resident nasal microbiota-the host or the environment-and can interactions among nasal bacteria determine S. aureus...

  15. NORMAL NASAL GENE EXPRESSION LEVELS USING CDNA ARRAY TECHNOLOGY

    Science.gov (United States)

    Normal Nasal Gene Expression Levels Using cDNA Array Technology. The nasal epithelium is a target site for chemically-induced toxicity and carcinogenicity. To detect and analyze genetic events which contribute to nasal tumor development, we first defined the gene expressi...

  16. Nasal bots...a fascinating world!

    Science.gov (United States)

    Angulo-Valadez, Carlos E; Scholl, Philip J; Cepeda-Palacios, Ramón; Jacquiet, Philippe; Dorchies, Philippe

    2010-11-24

    Larvae causing obligatory myiasis are numerous and they may affect cutaneous and subcutaneous tissues, wounds, nasopharyngeal cavities (nasal bots), internal organs and the digestive tract (bots) of domestic and wild animals and humans as well. Nasal bots belong to the Family Oestridae, Subfamily Oestrinae, which includes several important genera: Oestrus, Kirkioestrus, and Gedoelstia infecting Artiodactyla (except Cervidae) in Africa and Eurasia, Cephenemyia and Pharyngomyia infecting Cervidae, Rhinoestrus infecting horses, Cephalopina infecting camels, Pharyngobolus infecting African elephants, and Tracheomyia infecting Australian kangaroos. Nasal bots are widespread in Mediterranean and tropical areas and in affected animals they induce sneezing and nasal discharge which may become caked with dust making breathing very difficult. The aforementioned species of larvae are host-specific but sometimes the may be deposited in human eyes inducing a painful opthalmomyiasis of short duration. The first fascinating trait of these parasites is the very efficient morphological and biological adaptations to parasitism they show either as larvae or as adults, in order to facilitate their survival and search for a suitable host. Nasal bots have reached different degrees of complexity in their life cycles. Indeed, while for some species (e.g., Oestrus ovis, Rhinoestrus usbekistanicus) larvae are injected by flies directly into nostrils and develop in the sinuses before being ejected for external pupation, some other species migrate from eyes to blood before returning to nasal cavities either through the ethmoid bone (Gedoelstia hässleri) or via lungs and bronchi (Gedoelstia cristata). Moreover, larvae are very well-adapted to their environment being able to undergo through hypobiosis either inside or outside the host, according to the climatic environmental conditions and seasonality. The second fascinating trait of nasal bots is related to host behavioural and immune

  17. Effect of Local Nasal Immunotherapy on Nasal Blockage in Pollen-Induced Allergic Rhinitis of Guinea Pigs

    OpenAIRE

    Takeshi Nabe; Kayoko Kubota; Nobuaki Mizutani; Masanori Fujii; Tetsuya Terada; Hiroshi Takenaka; Shigekatsu Kohno

    2008-01-01

    Background: As a non-injection route for immunotherapy, local nasal immunotherapy has been examined in allergic rhinitis patients. However, it is unclear how the immunotherapy affects sneezing, biphasic nasal blockage and nasal hyperresponsiveness. Thus, we evaluated the therapeutic effects of nasal immunotherapy on the symptoms of guinea pig allergic rhinitis. Additionally, we also evaluated whether the immunotherapy relieved pollen-induced allergic conjunctivitis. Methods: Sensitized ani...

  18. Differential Kinetics and Distribution of Antibodies in Serum and Nasal and Vaginal Secretions after Nasal and Oral Vaccination of Humans

    OpenAIRE

    Rudin, Anna; Johansson, Eva-Liz; Bergquist, Charlotta; Holmgren, Jan

    1998-01-01

    Although nasal vaccination has emerged as an interesting alternative to systemic or oral vaccination, knowledge is scarce about the immune responses after such immunization in humans. In the present study, we have compared the kinetics and organ distribution of the antibody responses after nasal and oral vaccination. We immunized female volunteers nasally or orally with cholera toxin B subunit (CTB) and determined the specific antibody levels in serum and nasal and vaginal secretions, as well...

  19. Congenital nasal pyriform aperture stenosis: a rare cause of neonatal nasal airway obstruction

    Directory of Open Access Journals (Sweden)

    A Rao

    2015-04-01

    Full Text Available Congenital nasal pyriform aperture stenosis (CNPAS is a rare cause of nasal airway obstruction that clinically mimics choanal atresia in a neonate. The differentiation between the two is very important as the management of the two conditions is different. Timely recognition is important to prevent fatal outcome. CNPAS may present as an isolated condition or with associated craniofacial anomalies. Despite typical findings of CNPAS being present on cross-sectional imaging, this condition is commonly overlooked, probably because of a lack of familiarity with the normal morphological features of the nasal cavity in infants and also owing to a lack of awareness of this rare entity. Here we report a case of CNPAS with pre- and post-surgical CT images and the complication that occurred owing to nasal stenting.

  20. Alterações de tomografia pulmonar de alta resolução em pacientes com artrite reumatoide e suas associações com variáveis clínicas, demográficas, sorológicas e terapêuticas Pulmonary changes on high-resolution computed tomography of patients with rheumatoid arthritis and their association with clinical, demographic, serological and therapeutic variables

    Directory of Open Access Journals (Sweden)

    Thelma Larocca Skare

    2011-08-01

    Full Text Available JUSTIFICATIVA: Pacientes com artrite reumatoide (AR têm manifestações extra-articulares em até 50% dos casos OBJETIVO: Estudar a prevalência das alterações pulmonares à tomografia computadorizada de alta resolução em pacientes com AR e sua associação com variáveis demográficas, clinicas, sorológicas e terapêuticas. MÉTODO: Estudaram-se 71 pacientes com AR para idade de início da doença, tempo de doença, sexo, tabagismo, presença de nódulos reumatoides, síndrome de Sjögren secundária, fator reumatoide, presença de anti-CCP e fator antinuclear, queixas respiratórias, uso de medicamentos e achados pulmonares à tomografia de alta resolução. RESULTADOS: Existiam alterações tomográficas em 55% dos pacientes, sendo as mais comuns as presenças de vidro fosco, bandas parenquimatosas, bronquiectasias de tração e faveolamento. Nenhuma das variáveis clínicas estudadas se associou aos achados tomográficos, exceto a duração de doença que foi maior em pacientes com nódulos pulmonares e lesões reticulares (vidro fosco. CONCLUSÕES: Existe uma alta prevalência de alterações tomográficas na população de AR, as quais não se associam com variáveis clínicas, sorológicas, terapêuticas e demográficas salvo tempo de duração da doençaBACKGROUND: Extra-articular manifestations are found in up to 50% of the patients with rheumatoid arthritis (RA. OBJECTIVE: To assess the prevalence of pulmonary changes on high-resolution computed tomography (HRCT in patients with RA and their association with demographic, clinical, serological and therapeutic variables. METHOD: Seventy-one patients with RA were assessed regarding their age at RA onset, duration of disease, gender, tobacco use, presence of rheumatoid nodules, secondary Sjögren's syndrome, rheumatoid factor, presence of anti-CCP and antinuclear factor, respiratory complaints, use of medications, and pulmonary changes on HRCT. RESULTS: HRCT changes were identifi ed

  1. Risk factors for nasal malignancies in German men: the South-German Nasal cancer study

    Directory of Open Access Journals (Sweden)

    Greiser Eberhard M

    2012-11-01

    Full Text Available Abstract Background There are few studies of the effects of nasal snuff and environmental factors on the risk of nasal cancer. This study aimed to investigate the impact of using nasal snuff and of other risk factors on the risk of nasal cancer in German men. Methods A population-based case–control study was conducted in the German Federal States of Bavaria and Baden-Württemberg. Tumor registries and ear, nose and throat departments provided access to patients born in 1926 or later. Results Telephone interviews were conducted with 427 cases (mean age 62.1 years and 2.401 population-based controls (mean age 60.8 years. Ever-use of nasal snuff was associated with an odds ratio (OR for nasal cancer of 1.45 (95% confidence interval [CI] 0.88–2.38 in the total study population, whereas OR in smokers was 2.01 (95% CI 1.00-4.02 and in never smokers was 1.10 (95% CI 0.43–2.80. The OR in ever-smokers vs. never-smokers was 1.60 (95% CI 1.24–2.07, with an OR of 1.06 (95% CI 1.05–1.07 per pack-year smoked, and the risk was significantly decreased after quitting smoking. Exposure to hardwood dust for at least 1 year resulted in an OR of 2.33 (95% CI 1.40–3.91 in the total population, which was further increased in never-smokers (OR 4.89, 95% CI 1.92–12.49 in analyses stratified by smoking status. The OR for nasal cancer after exposure to organic solvents for at least 1 year was 1.53 (1.17–2.01. Ever-use of nasal sprays/nasal lavage for at least 1 month rendered an OR of 1.59 (1.04–2.44. The OR after use of insecticides in homes was 1.48 (95% CI 1.04–2.11. Conclusions Smoking and exposure to hardwood dust were confirmed as risk factors for nasal carcinoma. There is evidence that exposure to organic solvents, and in-house use of insecticides could represent novel risk factors. Exposure to asbestos and use of nasal snuff were risk factors in smokers only.

  2. Nasal Functional Evaluation Using Nasal Endoscopy, Acoustic Rhinometry, and Rhinomanometry on Nasal Airway-Obstructed Patients after Endoscopic Septoplasty, Corrective Rhinoplasty, and Internal Nasal Valve Surgery

    Directory of Open Access Journals (Sweden)

    Yiğit Özer Tiftikcioğlu

    2017-06-01

    Full Text Available Objective: Rhinoplasty is a very common surgical procedure that is performed throughout the world as well as in our country for aesthetic concerns, nasal obstruction, or both. However, functional results still remain subjective, and compared to the vast number of operations, studies about functional results in the literature are very limited. The aim of this study is to evaluate respiratory functions after corrective rhinoplasty and to find the benefits both numerically and statistically. Material and Methods: Thirty patients who were admitted to our department with nasal obstruction based on the statements of the patients were included in the study. Patients who were admitted only for aesthetic considerations were excluded from the study. These patients were preoperatively evaluated with radiographic and endoscopic imaging; preoperative nasal resistance and nasal airway cross-sectional area values were measured and recorded with acoustic rhinometry and rhinomanometry devices. Then, patients were operated by open rhinoplasty technique, and measurements were repeated at three months and one year postoperative follow-ups. Results: As a result of measurements made with rhinomanometry one year after the surgery, a decrease in resistance value was observed in 20 patients, and an increase in minimal cross-sectional area measured with acoustic rhinometry was observed in 24 patients. The values measured by both methods were found to be statistically significant. Conclusion: As a result of our study, we advocate performing both functional and aesthetic rhinoplasty operations instead of functional or aesthetic purposes alone.

  3. Squamous cell carcinoma of the nasal vestibule

    DEFF Research Database (Denmark)

    Horsmans, J D; Godballe, C; Jørgensen, K E

    1999-01-01

    From 1978 to 1992, 66 patients (32 women and 34 men) were treated for carcinoma of the nasal vestibule at Odense University Hospital. The treatment was radiotherapy (41 patients), surgery (13 patients) or a combination of the two modalities (12 patients). Twenty-one patients (32%) developed...

  4. High Flow Nasal Cannulae in preterm infants

    Directory of Open Access Journals (Sweden)

    F. Ciuffini

    2013-06-01

    Full Text Available Despite of improved survival of premature infants, the incidence of long term pulmonary complications, mostly associated with ventilation-induced lung injury, remains high. Non invasive ventilation (NIV is able to reduce the adverse effects of mechanical ventilation. Although nasal continuous positive airway pressure (NCPAP is an effective mode of NIV, traumatic nasal complications and intolerance of the nasal interface are common. Recently high flow nasal cannula (HFNC is emerging as an efficient, better tolerated form of NIV, allowing better access to the baby’s face, which may improve nursing, feeding and bonding. The aim of this review is to discuss the available evidence of effectiveness and safety of HFNC in preterm newborns with respiratory distress syndrome (RDS. It is known that distending pressure generated by HFNC increases with increasing flow rate and decreasing infant size and varies according to the amount of leaks by nose and mouth. The effects of HFNC on lung mechanics, its clinical efficacy and safety are still insufficiently investigated. In conclusion, there is a growing evidence of the feasibility of HFNC as an alternative mode of NIV. However, further larger randomized trials are required, before being able to recommend HFNC in the treatment of moderate respiratory distress of preterm infants.

  5. Staphylococcal nasal carriage of health care workers.

    Science.gov (United States)

    Akhtar, Naeem

    2010-07-01

    To determine the frequency of staphylococcal nasal carriage of health care workers (HCWs) and antimicrobial susceptibility profile of the isolates for appropriate decolonization therapy. An observational study. The study was conducted at Holy Family Hospital, Rawalpindi, during the period from May 2007 to April 2008. Nasal swabs from anterior nares of HCWs were cultured and identified as Staphylococcus aureus, coagulasenegative staphylococci (CoNS), methicillin-resistant S. aureus (MRSA), methicillin-resistant CoNS (MRCoNS) by using standard methods. Antimicrobial susceptibility testing was performed on Muller Hinton Agar using disc diffusion method. Of the 468 HCWs, 213 (45.5%) participants were men and 255 (54.5%) were women. Eighty five (18.2%) were nasal carriers of S. aureus, 07 (1.5%) for MRSA, 343 (73.3%) for CoNS and 10 (2.1%) for MRCoNS. The highest carriage rate for S. aureus was in midwives (30%) followed by maintenance staff (28.6%), security guards (25%), technicians (23.5%), staff nurses (22.7%) and 90% of S. aureus and CoNS were susceptible to amikacin, gentamicin and fluoroquinolones tested. Fluoroquinolones, preferably oral levofloxacin in combination with topical gentamicin ointment, in places like Pakistan where mupirocin is not routinely available, can be used for decolonization of nasal staphylococcal carriage.

  6. Nasal prosthesis rehabilitation: a case report

    DEFF Research Database (Denmark)

    Jain, Sumeet; Maru, Kavita; Shukla, Jyotsana

    2011-01-01

    Facial defects resulting from neoplasm, congenital malformation or trauma can be restored with facial prosthesis using different materials and retention methods to achieve life-like look and function. A nasal prosthesis can re-establish esthetic form and anatomic contours for mid-facial defects...

  7. Fracture of nasal bones: an epidemiologic analysis

    Directory of Open Access Journals (Sweden)

    Fornazieri, Marco Aurélio

    2008-12-01

    Full Text Available Introduction: One of the most common diseases in the otorhinolaryngology emergency room is the nasal bones fracture. The peak of incidence is between 15 and 25 years of age. Generally men are more affected. Objective: To analyze the age, gender and the most frequent causes of nasal fractures evaluated in the otorhinolaryngology service of a tertiary hospital. Method: Retrospective study of records of the patients with nasal fracture diagnosis treated between July 1st, 2003 and July 1st, 2007. Results: 167 patients with nasal bones fracture were included in the study, including 134 men and 33 women. Violence was the most frequent cause, with 55 cases (32.9%, followed by fall from their own height, with 33 cases (19.7%, and motorcycle accident, 14 cases (8.4%. The most common age was between 21 and 39 years (46.1%. Conclusion: Male, age between 21 and 39 years and violence are the most common characteristics found in our service. Motorcycle accidents also play an important role in this affection.

  8. Nasal reconstruction with articulated irradiated rib cartilage

    Energy Technology Data Exchange (ETDEWEB)

    Murakami, C.S.; Cook, T.A.; Guida, R.A. (Univ. of Washington School of Medicine, Seattle (USA))

    1991-03-01

    Nasal structural reconstruction is a formidable task in cases where there is loss of support to both the nasal dorsum and tip. A multitude of surgical approaches and materials have been used for the correction of the saddle-nose deformity with varying degrees of success. Articulated irradiated rib cartilage inserted through an external rhinoplasty approach was used to reconstruct nasal deformities in 18 patients over a 6-year period. Simultaneous use of a midline forehead flap to reconstruct the overlying soft tissue was required in four cases. Follow-up ranged from 1 to 6 years (mean, 2.8 years). Results were rewarding in most cases with marked improvement in nasal support and airway. Revision and/or replacement secondary to trauma or warping of the graft was required in four cases. None of the patients exhibited infection, extrusion, or noticeable resorption. A description of the surgical technique, review of all the cases, and recommendation for continued use of this graft material are discussed.

  9. Sensory properties of selected terpenes. Thresholds for odor, nasal pungency, nasal localization, and eye irritation.

    Science.gov (United States)

    Cometto-Muñiz, J E; Cain, W S; Abraham, M H; Kumarsingh, R

    1998-11-30

    We tested four normosmics and four anosmics in detection thresholds for six terpenes commonly found indoors: cumene, p-cymene, delta-3-carene, linalool, 1,8-cineole and geraniol. Normosmics provided odor thresholds and anosmics provided nasal pungency thresholds. All subjects provided nasal localization (i.e., right/left nostril) and eye irritation thresholds. Each type of threshold was measured eight times per subject-stimulus combination. Stimuli were presented from squeeze bottles in a two-alternative forced-choice procedure via an ascending method of limits. Odor thresholds ranged between 0.1 and 1.0 parts per million (ppm, by volume). Nasal pungency thresholds lay about three orders of magnitude above odor thresholds. Nasal localization and eye irritation thresholds did not differ between normosmics and anosmics, and fell close to nasal pungency thresholds. Olfactory thresholds could be obtained for all stimuli in all repetitions using the criterion of five correct choices in a row. Trigeminal thresholds (i.e., pungency, localization and eye irritation) could be obtained on all repetitions only for some terpenes using that same criterion. Carene and cineol produced nasal pungency and eye irritation on all repetitions. None of the terpenes could be localized on all repetitions, but cineol was localized a higher percentage of instances than were the other stimuli. At the other extreme, geraniol failed to evoke any of the three trigeminal responses in most instances. Overall, the results indicate that the three trigeminal thresholds produce a uniform view of the potency of these terpenes, with nasal pungency and eye irritation being slightly more sensitive than nasal localization. Furthermore, application of a previously derived linear solvation energy relationship to the results reinforced the view that physicochemical properties can predict the chemesthetic impact of volatile organic compounds.

  10. Eletrocardiografia computadorizada em cavalos Puro Sangue Lusitano submetidos a exercício físico

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    A. Melchert

    2012-06-01

    Full Text Available Foram estudados 24 cavalos atletas hígidos, machos, adultos, da raça Puro Sangue Lusitano, submetidos a esforço físico de trote e galope de rotina do animal, com o objetivo de avaliar a configuração do traçado do eletrocardiograma (ECG em repouso, mediante eletrocardiografia computadorizada, bem como os efeitos do exercício físico sobre os parâmetros clínicos e eletrocardiográficos destes animais. Foram avaliados exame físico e ritmo cardíaco antes e imediatamente após o exercício físico, assim como as distintas configurações de ondas p e complexos QRS, obtidas ao ECG de repouso. Após o treinamento, ocorreram taquicardia e taquipneia. O ritmo predominante no repouso foi o sinusal e, após o exercício, a taquicardia sinusal. Na morfologia das ondas, encontraram-se quatro configurações distintas para a onda p, e seis para o complexo QRS. Dentre as arritmias cardíacas em repouso, houve uma ocorrência de bloqueio atrioventricular de segundo grau, que desapareceu após exercício. Conclui-se que o traçado do ECG computadorizado de cavalos atletas Puro Sangue Lusitano revela distintas morfologias de ondas p e complexos QRS e baixa ocorrência de arritmias.

  11. Coblation nasal septal swell body reduction for treatment of nasal obstruction: a preliminary report.

    Science.gov (United States)

    Kim, So Jeong; Kim, Hee Tae; Park, Yun Hwi; Kim, Ju Yeon; Bae, Jung Ho

    2016-09-01

    In this paper, we present the results of coblation nasal septal swell body (NSB) reduction for the treatment of nasal obstruction in patients with abnormally thickened NSB. The study design was a retrospective clinical series conducted at a single tertiary medical center. Eight patients underwent coblation NSB reduction. Pre-operative and post-operative nasal functions were evaluated by acoustic rhinometry and subjective symptom scales. We also analyzed pre-operative CT scan images and nasal endoscopic findings. The mean maximal NSB width was 16.4 ± 2.2 mm on pre-operative coronal CT scan images. The mean visual analog scale score for nasal obstruction was decreased from preoperative 7.63 ± 0.99 points to 3.88 ± 0.92 points (postoperative 3 months), 4.16 ± 0.78 points (postoperative 6 months), and 4.63 ± 0.69 points (postoperative 1 year). Six out of the eight patients were satisfied with the clinical outcome at 1 year after the procedure. To the best of our knowledge, coblation NSB reduction has not yet been reported in the medical literature. Our results show that it can be an effective treatment modality for nasal valve narrowing in patients with abnormally thickened NSB.

  12. Nasal surgery in patients with systemic disorders

    Directory of Open Access Journals (Sweden)

    Sachse, Florian

    2010-01-01

    Full Text Available Multisystemic disorders represent a heterogenous group of diseases which can primarily manifest at the nose and paranasal sinuses as limited disease or secondarily as part of systemic involvement. Rhinologists therefore play an important role in the diagnostic but also therapeutic process. Although therapy of multisystemic disorders is primary systemic, additional rhinosurgery may become necessary. The spectrum of procedures consists of sinus surgery, surgery of the orbit and lacrimal duct, septorhinoplasty and closure of nasal septal perforation. Since the prevalence of most systemic diseases is very rare, recommendations are based on the analysis of single case reports and case series with a limited number of patients only. Although data is still limited, experiences published so far have shown that autologous cartilage or bone grafts can be used in nasal reconstruction of deformities caused by tuberculosis, leprosy, Wegener’s granulomatosis, sarcoidosis and relapsing polychondritis. Experiences gained from these diseases support the concept that well-established techniques of septorhinoplasty can be used in systemic diseases as well. However, a state of remission is an essential condition before considering any rhinosurgery in these patients. Even under these circumstances revision surgery has to be expected more frequently compared to the typical collective of patients undergoing septorhinoplasty. In addition, experiences gained from saddle nose reconstruction may in part be of value for the treatment of nasal septal perforations since implantation of cartilage grafts often represents an essential step in multilayer techniques of closure of nasal septal perforations. Aside from the treatment of orbital complications sinus surgery has been proven beneficial in reducing nasal symptoms and increasing quality of life in patients refractory to systemic treatment.

  13. [A case of neurinoma of the nasal septum].

    Science.gov (United States)

    Sakamoto, Kikuo; Gondo, Kyujiro; Tomita, Kazuhide; Kasuya, Takao

    2003-05-01

    Neurinoma grows in the modulated nerve with Schwann cells, and is observed for all positions of the body. It is comparatively rare for neurinoma to grow in the nasal cavity and paranasal sinuses, however. We report a case of neurinoma of the nasal septum. A 24-year-old man seen for nasal obstruction was found in anterior rhinoscopy to have a tumor of the bilateral nasal cavity. Computed tomography (CT) showed a soft tissue density mass in the anterior part of the nasal cavity. Because we suspected neurinoma from biopsy, we resected the tumor by Denker's operation under general anesthesia. We found that it originated from the nasal septum. Histopathological findings of the tumor indicated an Antoni A type neurinoma. After surgery, cartilago costalis was transplanted the plastic surgery to correct the defect in the nasal septum. The post operative course was good and no signs of recurrence were seen. This is the 19th case found in the literature.

  14. Evaluation of the nasal shape after orthognathic surgery

    Directory of Open Access Journals (Sweden)

    Wagner Ranier Maciel Dantas

    2015-02-01

    Full Text Available Introduction: Patients with dentofacial deformities may benefit from orthognathic surgery in the maxilla. Maxillary osteotomy may include procedures in the bone, cartilaginous, and soft tissues of the nose, leading to shape alterations. Objective: To evaluate the anatomic alterations of the nasal region in patients undergoing a Le Fort I osteotomy for advancement or superior impaction. Methods: This is a clinical prospective study. Twenty-one patients were evaluated during the preand postoperative periods. The positioning of the nasal tip and the modification of the nasal base were evaluated. Results: The results showed that the nasal tip was superiorly positioned in 85% of the cases, advanced in 80%, rotated in 80%, and there was a wide nasal base in 95%, resulting in esthetic improvement. Conclusions: Surgeries of maxillary advancement and superior reposition tend to cause elevation and advancement of the nasal tip, as well as enlargement of the nasal base.

  15. Dialectal and gender differences in nasalance for a Mandarin population.

    Science.gov (United States)

    Kim, Ha-Kyung; Yu, Xiao-meng; Cao, Yan-jing; Liu, Xiao-ming; Huang, Zhao-Ming

    2016-01-01

    The purpose of this study was to determine whether there are dialectal and gender related differences in nasalance of main Mandarin vowels and three sentences in 400 Chinese normal adults. The mean nasalance score difference for dialect and gender was significant (p nasalance scores show that Chongqing > Beijing > Shanghai > Guangzhou for the nasal sentence, oro-nasal sentence, /a/, /i/ and /u/. In addition, the average nasalance scores of females were higher than those of males for all speech materials in all dialects. The clinical significance of this study can be helpful in making nasalance clinical decisions for Chinese people with cleft palate, hearing disorders and dysarthria with resonance disorders. It also shows the theoretical and socio-cultural features for linguists considering dialects and gender.

  16. Correlations of nasal responses to leukotriene D4 and histamine nasal provocation with quality of life in allergic rhinitis

    OpenAIRE

    Zhu, Zheng; Xie, Yanqing; Guan, Weijie; Gao, Yi; Xia, Shu; Shi, Xu; Zheng, Jinping

    2016-01-01

    Background The symptoms of allergic rhinitis (AR) greatly affect the quality of life (QoL) in the patients with AR. The correlations of nasal response to leukotriene D4 (LTD4) and histamine nasal provocation with health related QoL in AR are not clear. Objective To evaluate the correlations of nasal response to LTD4 and histamine nasal challenge with QoL in AR. Methods Patients randomly underwent LTD4 and histamine nasal challenge tests, completed the rhinoconjunctivitis quality of life quest...

  17. Nasalance measures in German-speaking cleft patients.

    Science.gov (United States)

    Swennen, Gwen R J; Grimaldi, Hannes; Upheber, Juliane; Kramer, Franz-Josef; Dempf, Rupert

    2004-01-01

    The purpose of this study was to evaluate nasalance measures in German-speaking patients with different types of repaired cleft lip and palate and to find out if significant nasalance gender differences exist in the different cleft groups. A total of 125 German-speaking cleft patients (74 male and 51 female) were included in this study: 18 patients with isolated unilateral cleft lip (UCL; mean age: 13.00 +/- 2.03 years), 66 patients with complete unilateral cleft lip and palate (UCLP; mean age: 14.80 +/- 3.45 years), 25 patients with isolated cleft palate (CP; mean age: 14.60 +/- 3.48 years), and 16 patients with complete bilateral cleft lip and palate (BCLP; mean age: 14.30 +/- 3.61 years). Nasalance data were collected and computed using the NasalView hardware/software system (Fa. Tiger Electronics, Seattle, WA). Speech stimuli according to a modified Heidelberg Rhinophonia Assessment Form (sustained vowels "a," "e," "i," "o," and "u"; oral and nasal sentences; and three oral-nasal reading passages) were used to obtain nasalance scores. Nasalance distance and ratio were also calculated for the oral and nasal sentences and for one of the oral-nasal reading passages. Unpaired t tests showed no significant gender nasalance differences in each cleft group. Analysis of variance showed no significant differences in mean nasalance distance and ratio. For the nasal sentence, a significant difference (P = 0.032) in mean nasalance scores was found between the UCL and UCLP groups.

  18. Nasal Carriage of 200 Patients with Nasal Bone Fracture in Korea

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    Jun Wook Lee

    2013-09-01

    Full Text Available Background Pathogens in the nasal cavity during nasal surgery could lead to a systemicinfectious condition, such as bacteremia, nosocomial infection, or toxic shock syndrome.However, there is no research about the prevalence of nasal carriage in patients with nasalbone fracture.Methods This was a prospective, double-blind, randomized study about the rate of nasalcarriage in 200 patients with nasal bone fracture in Korea. Nasal secretions were taken fromboth the middle nasal meatus and colonized. All analyses were carried out using SPSS software.Results Pathogens were identified in 178 of the 200 cases. Coagulase-negative staphylococci(CNS were the most cultured bacteria in 127 (66.84% of the 190 total patients after excluding10 cases of contaminated samples, and methicillin-resistant coagulase-negative staphylococci(MRCNS were found in 48 (25.26%. Staphylococcus aureus was the second mostidentified pathogen, found in 36 (18.95%, followed by 7 cases (3.68% of methicillin-resistantStaphylococcus aureus (MRSA. The prevalence rate of MRSA in the females was higher thanthat in the males (RR=4.70; 95% CI, 1.09-20.18, but other demographic factors had no effecton the prevalence rate of MRSA and MRCNS.Conclusions The prevalence rate of these pathogens in patients with nasal bone fracture inKorea was similar to other reports. However, few studies have addressed the prevalence rateof CNS and MRCNS in accordance with risk factors or the change in prevalence according tospecific prophylaxis against infectious complications. Additional research is needed on thepotential connections between clinical factors and microbiological data.

  19. Augmentation Rhinoplasty in Cleft Lip Nasal Deformity: Preliminary Patients’ Perspective

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    William H. C. Tiong

    2014-01-01

    Full Text Available The correction of cleft lip nasal deformity is challenging and there have been numerous methods described in the literature with little demonstrated technical superiority of one over another. The common clinical issues associated with cleft lip nasal deformity are its lack of symmetry, alar collapse on the affected side, obtuse nasal labial angle, short nasal length, loss of tip definition, and altered columella show among others. We carried out augmentation of cleft lip rhinoplasties with rib graft in 16 patients over the one-year study period. Each of these patients was reviewed and given questionnaire before and after surgery to evaluate their response on the outcome to the approach. Preoperatively, nasal asymmetry is the main complaint (14/16, 87.5% among our series of patients. Postoperatively, 12 (75% patients out of the 16 reported significant improvement in their nasal symmetry with the other four marginal. All patients reported excellent nasal projection postoperatively with good nasal tip definition. Our series of patients reported overall good satisfaction outcome and will recommend this procedure to other patients with cleft lip nasal deformity. In conclusion, augmentation of cleft lip rhinoplasty can be employed to achieve perceivable and satisfactory outcome in patients with cleft lip nasal deformity.

  20. Fundus imaging with a nasal endoscope

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    P Mahesh Shanmugam

    2015-01-01

    Full Text Available Wide field fundus imaging is needed to diagnose, treat, and follow-up patients with retinal pathology. This is more applicable for pediatric patients as repeated evaluation is a challenge. The presently available imaging machines though provide high definition images, but carry the obvious disadvantages of either being costly or bulky or sometimes both, which limits its usage only to large centers. We hereby report a technique of fundus imaging using a nasal endoscope coupled with viscoelastic. A regular nasal endoscope with viscoelastic coupling was placed on the cornea to image the fundus of infants under general anesthesia. Wide angle fundus images of various fundus pathologies in infants could be obtained easily with readily available instruments and without the much financial investment for the institutes.

  1. Saline Nasal Irrigation for Upper Respiratory Conditions

    Science.gov (United States)

    2009-01-01

    Acute and chronic upper respiratory conditions are common and expensive disorders with enormous impact on patient quality of life and society at large. Saline nasal irrigation (SNI), a therapy with roots in Ayurvedic medicine that bathes the nasal mucosa with in spray or liquid saline, has been used as adjunctive care for upper respiratory conditions. In liquid form, SNI has been found to be effective adjunctive care by the Cochrane Collaboration for symptoms associated with chronic rhinosinusitis. Less conclusive clinical trial evidence supports its use in spray and liquid forms as adjunctive treatment for mild-to-moderate allergic rhinitis and acute upper respiratory infections. Consensus or expert opinion recommendations exist for SNI as a treatment for a variety of other conditions including rhinitis of pregnancy. SNI appears safe; side effects are minimal and transient. It can be recommended by clinicians to interested patients with a range of upper respiratory conditions in the context of patient education and printed instructional handouts. PMID:19904896

  2. SEPTOPLASTY WITH AND WITHOUT NASAL PACKING: A COMPARATIVE STUDY

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    Mitta

    2016-05-01

    Full Text Available Septoplasty is one of the most commonly performed surgeries in rhinology to relieve nasal obstruction of patients with distortion in the midline cartilage or septum of the nose to relieve nasal obstruction of patient and findings consistent with nasal endoscopy. The anterior nasal packing routinely done following septoplasty is usually conventional and not evidence based. The purpose of nasal packing is to obtain haemostasis, enhance opposition of septal flaps, avoid septal haematoma formation, close the dead space, avoid synechiae formation, provide support to septal cartilage and prevent its displacement. OBJECTIVE This study intends to evaluate the effects of nasal packing on surgical success and related complications in septoplasty. MATERIALS AND METHODS The present clinical prospective and randomised study was carried out on patients attending Otorhinolaryngology Department of Santhiram Medical College & General Hospital between March 2012 and March 2015. Patients undergoing septoplasty were randomised either to receive anterior nasal packing or to not receive nasal packing postoperatively. RESULTS Levels of pain experienced by patients with nasal packing postoperatively during the initial 24 hours postoperatively and during the removal of the pack were significantly more. Post-operative headache, epiphora, swallowing discomfort and sleep disturbance were more in patients with nasal packing and statistically (p.05. Septal haematoma, adhesions and local infections in both groups were statistically insignificant (p>.05. CONCLUSION Septoplasty enhances the standard of living of patients with septal deviation and nasal obstruction. Our study results suggest that nasal packing after septoplasty is not obligatory. Nasal packing causes considerably more pain and complications, and it should be reserved only for those who have bleeding predisposition.