1 küsimus noorele juhile : Milline peaks olema see firma, kus tahad viie aasta pärast töötada? / Kristi Loikmaa, Siim Saare, Tiiu Roosma ... [jt.

Index Scriptorium Estoniae

2009-01-01

Küsimusele vastavad Ekspress Hotline'i turundujuht Kristi Loikmaa, SEBi organisatsiooni arendusjuht Siim Saare, BonBon Lingerie disainer ja osanik Tiiu Roosma, Advisio asutaja ja juht Lauri Antalainen, Brenstoli müügijuht Maret Puskar ning Carrot Konverentside partner Ott Sarapuu

Pellet ablation and cloud flow characteristics in the JIPP T-IIU plasma with the injection-angle controllable system

International Nuclear Information System (INIS)

Sakakita, H.; Sato, K.N.; Liang, R.; Hamada, Y.; Ando, A.; Kano, Y.; Sakamoto, M.

1994-01-01

Pellet ablation and flow characteristics of ablation cloud have been studied in the JIPP T-IIU plasma by using an injection-angle controllable system. A new technique for an ice pellet injection system with controllability of injection angle has been developed and installed to the JIPP T-IIU tokamak in order to vary deposition profile of ice pellets within a plasma. Injection angle can be varied easily and successfully during an interval of two plasma shots in the course of an experiment, so that one can carry out various basic experiments by varying the pellet deposition profile. The injection angle has been varied poloidally from -6 to 6 degree by changing the angle of the last stage drift tube. This situation makes possible for pellets to aim at from about r = -2a/3 to r = 2a/3 of the plasma. From two dimensional observations by CCD cameras, details of the pellet ablation structures with various injection angles have been studied, and a couple of interesting phenomena have been found. In the case of an injection angle (θ) larger than a certain value (θ ≥ 4 o ), a pellet penetrates straightly through the plasma with a trace of straight ablation cloud, which has been expected from usual theoretical consideration. On the other hand, a long helical tail of ablation light has been observed in the case of the angle smaller than the certain value (θ ≤ 4 o ). (author) 4 refs., 4 figs

SU-F-T-76: Total Skin Electron Therapy: An-End-To-End Examination of the Absolute Dosimetry with a Rando Phantom

Energy Technology Data Exchange (ETDEWEB)

Cui, G; Ha, J; Zhou, S; Cui, J; Shiu, A [University Southern California, Los Angeles, CA (United States)

2016-06-15

Purpose: To examine and validate the absolute dose for total skin electron therapy (TSET) through an end-to-end test with a Rando phantom using optically stimulated luminescent dosimeters (OSLDs) and EBT3 radiochromic films. Methods: A Varian Trilogy linear accelerator equipped with the special procedure 6 MeV HDTSe- was used to perform TSET irradiations using a modified Stanford 6-dual-field technique. The absolute dose was calibrated using a Markus ion chamber at a reference depth of 1.3cm at 100 cm SSD with a field size of 36 × 36 cm at the isocenter in solid water slabs. The absolute dose was cross validated by a farmer ion chamber. Then the dose rate in the unit of cGy/Mu was calibrated using the Markus chamber at the treatment position. OSLDs were used to independently verify the dose using the calibrated dose rate. Finally, a patient treatment plan (200 cGy/cycle) was delivered in the QA mode to a Rando phantom, which had 16 pairs of OSLDs and EBT3 films taped onto its surface at different anatomical positions. The doses recorded were read out to validate the absolute dosimetry for TSET. Results: The OSLD measurements were within 7% agreement with the planned dose except the shoulder areas, where the doses recorded were 23% lower on average than those of the planned. The EBT3 film measurements were within 10% agreement with the planned dose except the shoulder and the scalp vertex areas, where the respective doses recorded were 18% and 14% lower on average than those of the planned. The OSLDs gave more consistent dose measurements than those of the EBT3 films. Conclusion: The absolute dosimetry for TSET was validated by an end-to-end test with a Rando phantom using the OSLDs and EBT3 films. The beam calibration and monitor unit calculations were confirmed.

Design of a head phantom produced on a 3D rapid prototyping printer and comparison with a RANDO and 3M lucite head phantom in eye dosimetry applications.

Science.gov (United States)

Homolka, Peter; Figl, Michael; Wartak, Andreas; Glanzer, Mathias; Dünkelmeyer, Martina; Hojreh, Azadeh; Hummel, Johann

2017-04-21

An anthropomorphic head phantom including eye inserts allowing placement of TLDs 3 mm below the cornea has been produced on a 3D printer using a photo-cured acrylic resin to best allow tissue equivalence. Thus H p (3) can be determined in radiological and interventional photon radiation fields. Eye doses and doses to the forehead have been compared to an Alderson RANDO head and a 3M Lucite skull phantom in terms of surface dose per incident air kerma for frontal irradiation since the commercial phantoms do not allow placement of TLDs 3 mm below the corneal surface. A comparison of dose reduction factors (DRFs) of a common lead glasses model has also been performed. Eye dose per incident air kerma were comparable between all three phantoms (printed phantom: 1.40, standard error (SE) 0.04; RANDO: 1.36, SE 0.03; 3M: 1.37, SE 0.03). Doses to the forehead were identical to eye surface doses for the printed phantom and the RANDO head (ratio 1.00 SE 0.04, and 0.99 SE 0.03, respectively). In the 3M Lucite skull phantom dose on the forehead was 15% lower than dose to the eyes attributable to phantom properties. DRF of a sport frame style leaded glasses model with 0.75 mm lead equivalence measured were 6.8 SE 0.5, 9.3 SE 0.4 and 10.5 SE 0.5 for the RANDO head, the printed phantom, and the 3M Lucite head phantom, respectively, for frontal irradiation. A comparison of doses measured in 3 mm depth and on the surface of the eyes in the printed phantom revealed no difference larger than standard errors from TLD dosimetry. 3D printing offers an interesting opportunity for phantom design with increasing potential as printers allowing combinations of tissue substitutes will become available. Variations between phantoms may provide a useful indication of uncertainty budgets when using phantom measurements to estimate individual personnel doses.

Optimisation need of dental radiodiagnostic procedures: results of effective dose evaluation from Rando phantom measurements

International Nuclear Information System (INIS)

Borio, R.; Chiocchini, S.; Cicioni, R.; Degli Esposti, P.; Rongoni, A.; Sabatini, P.; Saetta, D.M.S.; Regi, L.; Caprino, G.

1994-01-01

Radiological examinations of different types are needed in dental practice both to make a correct diagnosis and to carry out an adequate therapy. Particularly in orthodentic practices, because of the youth of the majority of the patients, an assessment of the detriment to health (through the effective dose equivalent) caused by medical diagnostic exposure to ionising radiation is needed to make decisions about the optimisation of dental radiodiagnostic procedures. Experimental data from measurements on a Rando phantom were collected for the radiological examinations required for dental and for orthodontic practices (with and without protective apron and collar). The results show the effectiveness of the leaded apron and collar in all the examinations carried out, particularly in reducing thyroid dose. (author)

Dose Measurements of Parotid Glands and Spinal Cord in Conventional Treatment of Nasopharyngeal Carcinoma Using RANDO Phantom and Thermoluminescent Dosimeters

Directory of Open Access Journals (Sweden)

Mohammad Taghi Bahreyni Toossi

2015-07-01

Full Text Available Introduction Radiotherapy is regarded as the first treatment of choice for nasopharyngeal carcinoma. Despite the advantages of radiotherapy, patients may suffer from a wide range of side-effects due to the presence of many sensitive normal tissues in these regions. If the absorbed dose exceeds the tolerance level in parotid glands and the spinal cord, myelopathy, Lhermitte's sign and xerostomia cannot be avoided. Materials and Methods The head and neck of a RANDO phantom (reference man, which was regarded as a hypothetical patient with nasopharyngeal carcinoma was evaluated. The full course of treatment consisted of three phases. At the beginning of each phase, an oncologist marked conventional fields on the RANDO phantom using a simulator. For measuring the absorbed dose, Thermoluminescent Dosimeters(TLD chips (TLD-100 were utilized.The absorbed dose by TLDs was read by Harshaw 3500 TLD reader. Results The total absorbed dose was calculated by measuring the absorbed dose in each phase, multiplied by the fraction numbers of each phase; the obtained values were summed up. The results showed that the received doses by spinal cord ranged from 15.24 to 54.56 Gy. Also, the absorbed dose of parotid glands was approximately 39.23 Gy. Conclusion Considering the minimum tolerance dose the absorbed doses in the spinal cord and parotid glands were above the tolerance level. The incidence rate of xerostomia and myelopathy were higher in patients, treated by conventional methods.

Feedback control of plasma equilibrium with control system aided by personal computer on the JIPP T-IIU tokamak

International Nuclear Information System (INIS)

Tsuzuki, T.; Toi, K.; Matsuura, K.

1991-04-01

A feedback control system aided by a personal computer is developed to maintain plasma position on the required position in the JIPP T-IIU tokamak. The personal computer enables to adjust various control parameters easily. In this control system, a control demand for driving the power supply of feedback controlled vertical field coils is composed to be proportional to a total plasma current. This system has been successfully employed throughout the discharge where the plasma current substantially changes from zero to hundreds of kiloamperes, because the feedback control can be done, being independent of the plasma current. The analysis of this feedback control system taken into account of digital sampling agrees well with the experimental results. (author)

Preparing a voxel-simulator of Alderson Rando physical phantom

International Nuclear Information System (INIS)

Boia, Leonardo S.; Martins, Maximiano C.; Silva, Ademir X.; Salmon Junior, Helio A.; Soares, Alessandro F.N.S.

2011-01-01

There are, nowadays, sorts of anthropomorphycal phantoms which are used for simulation of radiation transport by the matter and also the deposition of energy in such radiation in human tissues and organs, because an in-vitro dosimetry becomes very either complicated or even impossible in some cases. In the present work we prepared a computational phantom in voxels based on computational tomography of Rando-Alderson. This phantom is one of the most known human body simulators on the scope of ionizing radiation dosimetry, and it is used for radioprotection issues and dosimetry from radiotherapy and brachytherapy treatments as well. The preparation of a voxel simulator starts with the image acquisition by a tomograph found at COI/RJ (Clinicas Oncologicas Integradas). The images were generated with 1mm cuts and collected for analysis. After that step the images were processed in SAPDI (Sistema Automatizado de Processamento Digital de Imagem) in order to amplify the images regions intending to facilitate the task in their segmentation. SAPDI is based on parameters described by Hounsfield scale. After that, it has begun discretization of elements in IDs voxels using Scan2MCNP software - which converts images to a sequential text file containing the voxels' IDs ready to be introduced into MCNPX input; however, this set can be turned to a voxel's IDs matrix and used in other Monte Carlo codes, such as Geant4, PENELOPE and EGSnrc. Finished this step, the simulator is able to simulate with accurate geometry the physical phantom. It's possible to study a large number of cases by computational techniques of geometry's insertions of tumors and TLDs, which makes this simulator a research material useful for a lot of subjects. (author)

Preparing a voxel-simulator of Alderson Rando physical phantom

Energy Technology Data Exchange (ETDEWEB)

Boia, Leonardo S.; Martins, Maximiano C.; Silva, Ademir X., E-mail: lboia@con.ufrj.br, E-mail: ademir@con.ufrj.br [Programa de Engenharia Nuclear (PEN/COPPE/UFRJ). Universidade Federal do Rio de Janeiro, RJ (Brazil); Salmon Junior, Helio A., E-mail: heliosalmon@coinet.com.br [COI - Clinicas Oncologicas Integradas, MD.X Barra Medical Center, Rio de Janeiro, RJ (Brazil); Soares, Alessandro F.N.S., E-mail: afacure@cnen.gov.br [Comissao Nacional de Engenharia Nuclear (CNEN), Rio de Janeiro, RJ (Brazil)

2011-07-01

There are, nowadays, sorts of anthropomorphycal phantoms which are used for simulation of radiation transport by the matter and also the deposition of energy in such radiation in human tissues and organs, because an in-vitro dosimetry becomes very either complicated or even impossible in some cases. In the present work we prepared a computational phantom in voxels based on computational tomography of Rando-Alderson. This phantom is one of the most known human body simulators on the scope of ionizing radiation dosimetry, and it is used for radioprotection issues and dosimetry from radiotherapy and brachytherapy treatments as well. The preparation of a voxel simulator starts with the image acquisition by a tomograph found at COI/RJ (Clinicas Oncologicas Integradas). The images were generated with 1mm cuts and collected for analysis. After that step the images were processed in SAPDI (Sistema Automatizado de Processamento Digital de Imagem) in order to amplify the images regions intending to facilitate the task in their segmentation. SAPDI is based on parameters described by Hounsfield scale. After that, it has begun discretization of elements in IDs voxels using Scan2MCNP software - which converts images to a sequential text file containing the voxels' IDs ready to be introduced into MCNPX input; however, this set can be turned to a voxel's IDs matrix and used in other Monte Carlo codes, such as Geant4, PENELOPE and EGSnrc. Finished this step, the simulator is able to simulate with accurate geometry the physical phantom. It's possible to study a large number of cases by computational techniques of geometry's insertions of tumors and TLDs, which makes this simulator a research material useful for a lot of subjects. (author)

High frequency ion Bernstein wave heating experiment on JIPP T-IIU tokamak

International Nuclear Information System (INIS)

Seki, T.; Kumazawa, R.; Watari, T.

1992-08-01

An experiment in a new regime of ion Bernstein wave (IBW) heating has been carried out using 130 MHz high power transmitters in the JIPP T-IIU tokamak. The heating regime utilized the IBW branch between the 3rd and 4th harmonics of the hydrogen ion cyclotron frequencies. This harmonic number is the highest among those used in the IBW experiments ever conducted. The net radio-frequency (RF) power injected into the plasma is around 400 kW, limited by the transmitter output power. Core heating of ions and electrons was confirmed in the experiment and density profile peaking was found to feature the IBW heating (IBWH). The peaking of the density profile was also found when IBW was applied to the neutral beam injection heated discharges. An analysis by use of a transport code with these experimental data indicates that the particle confinement should be improved in the plasma core region on the application of IBWH. It is also found that the ion energy distribution function observed during IBWH has less high energy tail than those in conventional ion cyclotron range of frequency heating regimes. The observed IBWH-produced ion energy distribution function is in a reasonable agreement with the calculation based on the quasi-linear RF diffusion / Fokker-Planck model. (author)

Zeff measurements and low-Z impurity transport for NBI and ICRF heated plasma in JIPP T-IIU tokamak

International Nuclear Information System (INIS)

Ida, K.; Amano, T.; Kawahata, K.; Kaneko, O.

1988-12-01

A visible bremsstrahlung detector array system for Z eff measurements and a charge exchange recombination spectroscopy (CXRS) system for fully ionized impurity profile measurements were installed on JIPP TII-U to study impurity transport for NBI and ICRF heated plasma. More impurities are sputtered by ICRF heating than by NBI and/or ohmic heatings. The carbon contribution to Z eff is 80-90 % for NBI heated plasmas, and 60 % for NBI + ICRF heated plasmas. With a carbon coating of vacuum vessel, the Z eff value decreases 2.4 to 1.7 and the carbon contribution to Z eff increases up to 80-90 %. We obtain the diffusion coefficient D a = 1.0 m 2 /s and the convective velocity V a (a) = 13 m/s at the plasma edge for carbon impurity from the radial profile and time evolution of fully ionized carbon after the ICRF pulse is turned on. (author)

Monte Carlo and experimental internal radionuclide dosimetry in RANDO head phantom

International Nuclear Information System (INIS)

Ghahraman Asl, Ruhollah; Nasseri, Shahrokh; Parach, Ali Asghar; Zakavi, Seyed Rasoul; Momennezhad Mehdi; Davenport, David

2015-01-01

Monte Carlo techniques are widely employed in internal dosimetry to obtain better estimates of absorbed dose distributions from irradiation sources in medicine. Accurate 3D absorbed dosimetry would be useful for risk assessment of inducing deterministic and stochastic biological effects for both therapeutic and diagnostic radiopharmaceuticals in nuclear medicine. The goal of this study was to experimentally evaluate the use of Geant4 application for tomographic emission (GATE) Monte Carlo package for 3D internal dosimetry using the head portion of the RANDO phantom. GATE package (version 6.1) was used to create a voxel model of a human head phantom from computed tomography (CT) images. Matrix dimensions consisted of 319 × 216 × 30 voxels (0.7871 × 0.7871 × 5 mm 3 ). Measurements were made using thermoluminescent dosimeters (TLD-100). One rod-shaped source with 94 MBq activity of 99m Tc was positioned in the brain tissue of the posterior part of the human head phantom in slice number 2. The results of the simulation were compared with measured mean absorbed dose per cumulative activity (S value). Absorbed dose was also calculated for each slice of the digital model of the head phantom and dose volume histograms (DVHs) were computed to analyze the absolute and relative doses in each slice from the simulation data. The S-values calculated by GATE and TLD methods showed a significant correlation (correlation coefficient, r 2 ≥ 0.99, p < 0.05) with each other. The maximum relative percentage differences were ≤14 % for most cases. DVHs demonstrated dose decrease along the direction of movement toward the lower slices of the head phantom. Based on the results obtained from GATE Monte Carlopackage it can be deduced that a complete dosimetry simulation study, from imaging to absorbed dose map calculation, is possible to execute in a single framework.

Experimental characteristics of ion Bernstein wave heating on JIPP T-IIU tokamak

International Nuclear Information System (INIS)

Ogawa, Y.; Kawahata, K.; Ando, R.

1986-03-01

The directly launched Ion Bernstein Wave (IBW) heating experiments have been carried out on JIPP T-IIU tokamak for two experimental conditions; (a) the ''3rd-branch'' of the IBW between 3rd- and 4th-cyclotron harmonics of the deuterium, and (b) the ''2nd-branch'' of the IBW between 2nd- and 3rd-cyclotron harmonics. In the case (a), the direct hydrogen heating at ω = 1.5 Ω H has been found in previous experiments. Here we present additional data to support this subharmonics heating, i.e., the spectroscopic measurement of Fe XVIII lines and mass separated analysis of charge-exchange neutrals. While, in the case (b), the remarkable increase of the electron temperature has been observed, especially at the central region of the plasma, and it has been estimated from the global energy balance that almost all of IBW power is delivered to the electron. To investigate this difference of the heating mode, the power absorption has been calculated with the ray tracing code, taking into account of the effect of the plasma/antenna coupling. It is concluded from the consideration of the electron Landau damping that the transition from the ion heating mode to the electron one would be explained by the difference of the electron temperature at the ohmic phase; i.e., T e (0) = 0.7 keV for the case (a) and T e (0) = 1.3 keV for the case (b). (author)

High speed graphic program on a personal computer and its utilization in JIPP T-IIU online data-processing system

International Nuclear Information System (INIS)

Taniguchi, Yoshiyuki; Noda, Nobuaki; Sasao, Mamiko; Sato, Masahiro

1986-01-01

A high speed graphic program was developed on a personal computer PC9801. Using this program, one can draw a waveform of successive 16 bit-integer data, such as obtained by analog-to-digital convertor. The program is written by the machine language and has a form of a subroutine program which can be called from main programs under N 88 BASIC. The time for drawing one waveform is 4 ms, which is two orders faster than the time with standard graphic routines of BASIC interpreter. This program is very convenient for the real-time display of plasma-monitoring raw data, such as plasma current, loop voltage, rf power etc. in tokamak experiments. This program has been utilized in JIPP T-IIU experiments and enables to display data of 8 channel ADC within a few seconds before the system transmits the data from CAMAC to the computer center of the institute. The program and its utilization are presented. (author)

Interaction of an ice pellet and a toroidal plasma in the JIPP T-IIU tokamak with the injection-angle controllable system

International Nuclear Information System (INIS)

Sato, K.N.; Sakakita, H.; Liang, R.; Hamada, Y.; Ida, K.; Kano, Y.; Sakamoto, M.

1994-01-01

The interaction of an ice pellet and a toroidal plasma has been studied in the JIPP T-IIU tokamak by using an injection-angle controllable system. In order to carry out various basic experiments by varying the pellet deposition profile within a plasma, anew technique for an ice pellet injection system with controllability of the injection angle has been developed and installed with the JIPP t-IIU tokamak. Injection angle can be varied easily and successfully during an interval of two plasma shots in the course of an experiment. The injection angle has been varied poloidally from 6 to 6 degree by changing the angle of the last stage drift tube, and this makes possible for pellets to aim at from about r = -2 a/3 to r = 2 a/3 of the plasma. From two dimensional observations by CCD cameras, details of the pellet ablation structures with various injections angles have been studied, and a couple of interesting phenomena have been found. In the case of an injection angle (θ) larger than a certain value (θ ≥ 4 0 ), a pellet penetrates straightly through the plasma with a trace of straight ablation cloud, which has been expected from usual theoretical consideration. On the other hand, a long helical tail of ablation light has been observed in the case of the angle smaller than the certain value (θ ≤ 4 0 ). The direction of helical rotation (tail) is independent to that of the total magnetic field lines of the torus. In order to examine the tail direction, further experiments have been carried out as to four conditions of the combination with two (clockwise and counter-clockwise) toroidal field directions and with two plasma current directions. The results show that it seems to rotate to the electron diamagnetic direction poloidally, and to the opposite to the plasma current direction toroidally. Consideration on various cross sections including charge exchange, ionization and elastic collisions leads us to the conclusion that the tail-shaped phenomena may come from

Plasma current startup by lower hybrid waves in the JIPP T-IIU tokamak

International Nuclear Information System (INIS)

Toi, K.; Ohkubo, K.; Kawahata, K.

1987-04-01

This paper describes the characteristic behaviours of lower hybrid current startup in JIPP T-IIU. The current startup is carried out by injection of 800 MHz lower hybrid waves into cold and low density plasmas (Te = 10 - 20 eV, n-bar e = 1 - 2 x 10 12 cm -3 ) produced by electron cyclotron resonance or lower hybrid waves only. The plasma current rises up with a characteristic rise time τ r (> approx 30 - 50 ms) and approaches a quasi-steady state value I pm (= 5 - 20 kA), when LHW power of 10 - 50 kW is injected into a torus, controlling the vertical field. The rise time is inversely proportional to the bulk electron density n-bar e , and is comparable to the collision time of current-carrying high energy electrons with bulk plasmas. On the other hand, the current drive efficiency in the quasi-steady state is almost independent of n-bar e , i.e., I pm /P LH = 0.4 - 0.7 A/W for n-bar e = 0.8 - 4 x 10 12 cm -3 . The conversion efficiency of rf energy injected into the torus is typically 5 % during current rise phase, and 10 % at the most efficient case. The effects of the initial injection of ECH power and the observed parametric instabilities on the current startup are investigated from a viewpoint of seed current generation. During rapid current rise when appreciably negative loop voltage is observed the bulk electrons are heated up to 150 eV. Various heating mechanisms responsible for the bulk electron heating are discussed. (author)

Power absorption and confinement studies of ICRF-heated plasma in JIPP T-IIU tokamak

International Nuclear Information System (INIS)

Ida, K.; Ogawa, Y.; Toi, K.

1988-08-01

The energy confinement characteristics of ICRF-heated tokamak plasmas are studied at high input power density ∼ 2 MWm -3 volume averaged, on the JIPP T-IIU device(R = 0.91 m/a = 0.23 m). High electron and ion temperatures (T e ∼ 2.5 keV, T i ∼ 2.0 keV, at each maximum) have been achieved by the operation at a plasma current I P of 280 kA, plasma line-averaged electron density n-bar e of 7 x 10 13 cm -3 and input power of 2 MW, with a suppression of total radiation loss (30 to 40 % of the total input power) by a carbon coating on the vacuum vessel. The fraction of ICRF power absorbed by the plasma, α, is determined experimentally from the decay of the stored plasma energy just after the ICRF pulse is terminated. The value of α increases slightly with increasing electron density and decreases from 90 to 70 % as the ICRF power is increased from 1 MWm -3 to 2 MWm -3 volume averaged. The global energy confinement time τ E , defined by W P /(P OH + αP rf ), decreases by a factor of 2 ∼ 3 from that in ohmic plasmas as the heating power increases up to 2 MW. It is found that the energy confinement time has a strong line-averaged electron density dependence as τ E ∝n-bar e 0.6 , which is obtained by the use of the measured absorbed power, while the Kaye-Goldston scaling predicts τ E ∝n-bar e 0.26 . (author)

Slalomiste Oprjat ja Nurmbergi muserdavad rasked traumad / Priit Pullerits

Index Scriptorium Estoniae

Pullerits, Priit, 1965-

2006-01-01

Eesti mäesuusataja Deyvid Oprja selg ja Tiiu Nurmbergi põlv on nii tõsiselt viga saanud, et neid abistava kiropraktiku Allan Austin Oolo hinnangul on mõlema sportlase olukord äärmiselt tõsine. Tiiu Nurmberg lõpetas oma etteaste 44. kohaga

Delta Plaza kohvik = Delta Plaza cafe

Index Scriptorium Estoniae

2010-01-01

Tallinnas Pärnu mnt 141 asuva kohviku Delta Plaza sisekujundusest. Sisearhitektid Tiiu Truus ja Marja Viltrop (Stuudio Truus OÜ). Tiiu Truusi tähtsamate tööde loetelu. Büroohoone Delta Plaza arhitektid Marika Lõoke ja Jüri Okas (AB J. Okas & M. Lõoke)

Zebra - sõbralik ja lillelõhnaline / Ell-Maaja Randküla

Index Scriptorium Estoniae

Randküla, Ell-Maaja, 1939-2016

2006-01-01

Tallinnas Narva mnt. 7 asuva kohviku Zebra sisekujundus. Sisearhitekt Tiiu Truus. Ehitus: AS KMG Ehitus. Materjalidest on kasutatud triibulise mustriga puitu Zebrano ja looduskivi. Laes on dekoratiivsed lipud, mille graafiline kujundus on Tiiu Priskolt ja Mati Veermetsalt. Tualettruumi looduskivist valamu ja põrandavaasi autor on Kaido Kivi. Ill.: põhiplaan, 11 värv. vaadet

Kunstiga Eestimaad avastamas / Mart Helme

Index Scriptorium Estoniae

Helme, Mart, 1949-

2006-01-01

Kirjastuselt "Kunst" ilmunud uued raamatud: "Eestimaa. Looduse teejuht", tekst ja fotod Tiit Hunt; "Eestimaa. Linnuste teejuht", tekst Mart Helme; "Eestimaa. Kirikute teejuht", tekst Mart Helme, fotod Peeter Säre; "Eestimaa. Kultuurituristi teejuht", koostaja Tiiu Viirand; "Eestimaa. Ranniku teejuht", tekst Tiiu Viirand; "Eestimaa mõisate teejuht", fotod Peeter Säre, tekst Mart Helme, Alfred Wells

Comparison of the calculated absorbed dose using the Cadplan™ treatment planning software and Tld-100 measurements in an Alderson-Rando phantom for a bronchogenic treatment

Energy Technology Data Exchange (ETDEWEB)

Gutiérrez Castillo, J. G., E-mail: jggc59@hotmail.com [Departamento de Física, Hospital de Oncología, IMSS, CMN Siglo XXI, Cuauhtémoc 330 Col. Doctores (Mexico); Álvarez Romero, J. T., E-mail: trinidad.alvarez@inin.gob.mx, E-mail: fisarmandotorres@gmail.com, E-mail: victor.tovar@inin.gob.mx; Calderón, A. Torres, E-mail: trinidad.alvarez@inin.gob.mx, E-mail: fisarmandotorres@gmail.com, E-mail: victor.tovar@inin.gob.mx; M, V. Tovar, E-mail: trinidad.alvarez@inin.gob.mx, E-mail: fisarmandotorres@gmail.com, E-mail: victor.tovar@inin.gob.mx [SSDL, Departamento de Metrología ININ, Salazar, Estado de México 15245 (Mexico)

2014-11-07

To verify the accuracy of the absorbed doses D calculated by a TPS Cadplan for a bronchogenic treatment (in an Alderson-Rando phantom) are chosen ten points with the following D's and localizations. Point 1, posterior position on the left edge with 136.4 Gy. Points: 2, 3 and 4 in the left lung with 104.9, 104.3 and 105.8 Gy, respectively; points 5 and 6 at the mediastinum with 192.4 and 173.5 Gy; points 7, 8 and 9 in the right lung with 105.8, 104.2 and 104.7 Gy, and 10 at posterior position on right edge with 143.7 Gy. IAEA type capsules with TLD 100 powder are placed, planned and irradiated. The evaluation of the absorbed dose is carried out a curve of calibration for the LiF response (nC) {sup vs} {sup DW}, to several cavity theories. The traceability for the DW is obtained with a secondary standard calibrated at the NRC (Canada). The dosimetric properties for the materials considered are determined from the Hounsfield numbers reported by the TPS. The stopping power ratios are calculated for nominal spectrum to 6 MV photons. The percent variations among the planned and determined D in all the cases they are < ± 3%.

Arigato Spordiklubi = Arigato Sports Club

Index Scriptorium Estoniae

2008-01-01

Arigato Spordiklubi (Rannamõisa tee 3, Tallinn) sisekujundusest. Arhitektid: Kätlin Mänd ja Endrik Mänd. Sisearhitekt: Tiiu Truus (Stuudio Truus OÜ), kaasa töötasid: Kaari Salu ja Kristi Prinzmann. Tiiu Truusist, tema tähtsamad tööd. I-IV korruse plaan, värv. välisvaade, 13 sisevaadet, foto T. Truusist

Plaadid / Rando Tooming

Index Scriptorium Estoniae

Tooming, Rando

2003-01-01

Uutest plaatidest Back in the ESSR "From the Archives of Eesti raadio 1966-1982", The Donnas "Spend the Night", "Furure Sounds of Jazz vol. 9", Dino Saluzzi "Responsorium", The Clash "Essential Clash", Sly & Family Stone "Essential", Madonna "American Life", Louis Armstrong & Ella Fitzgerald "Ella & louis Again"

Liberalistlik sissejuhatus poliitilisse filosoofiasse / Tanel Vallimäe, Peeter Selg

Index Scriptorium Estoniae

Vallimäe, Tanel, 1975-

2008-01-01

Vastukaja arvustusele: Reiland, Indrek. Normatiivse poliitikafilosoofia peateemad (Rets. rmt.: Wolff, Jonathan. Sissejuhatus poliitikafilosoofiasse / tlk. Tiiu Hallap. Tartu, 2005). Akadeemia, 2008, nr. 4, lk. 880-883

Peeter Saks maksab karmavõlga / Paavo Kangur

Index Scriptorium Estoniae

Kangur, Paavo, 1966-

2006-01-01

Investeerimispanga Suprema Securities juhatuse esimees Peeter Saks oma sportlasekarjäärist, muudatustest investeerimispanga juhtkonnas ning panga tegevusest sportlaste toetamisel. Kommenteerib mäesuusataja Tiiu Nurmberg

Heldi Thomson

Index Scriptorium Estoniae

1997-01-01

Teaduspreemia autorite kollektiivile arstiteaduse alal töö "Vähktõbi Eestis 1968-1992: haigestumus, levimus, elulemus ja suremus" eest - Mati Rahu (kollektiivi juht), Tiiu Aarelaid, Kaja Gornoi, Heldi Thomson

Sügiskonverents "Kunst paguluses"...

Index Scriptorium Estoniae

2008-01-01

28. VIII Kumu Kunstimuuseumi auditooriumis toimuva konverentsi kava. Esinevad Jaan Undusk, Piret Kruuspere, Avo Hirvesoo, Mara Lace, Osvaldas Daugelis, Piret Noorhani, Irja Bergström, Tiiu Talvistu ja Kersti Koll

Rozhdenije "Biologitsheskogo natshala" Ivana Zubaki : Tallinn-Uels, sentjabr 2002 g / Ivan Zubaka ; interv. Svetlana Hristoforova

Index Scriptorium Estoniae

Zubaka, Ivan

2002-01-01

IV rahvusvahelisest puuskulptuurisümpoosiumist Wales'is, organiseerijaks skulptor Tom Gilhespy: korraldusest, oma skulptuuri "Bioloogiline alge" valmimisest. Eestist osalesid veel Tiiu Kirsipuu, Aime Kuulbusch, Urmas Rauba ja Ekke Väli

Kuni 21. III on Tartu Kunstimajas vaadata Eesti Nahakunstnike Liidu näitust "Nahk on ruumis"

Index Scriptorium Estoniae

2004-01-01

Kujundaja Tea Tammelaan. Osalevad Tiiu Tulev, Pille Kivihall, Rete Kalder, Ulla Torop, Tiina Piisang, Rutt Maantoa jt. Eksponeeritakse ka jaapanlannast animatsioonikunstniku Maya Jonesho eesti köitekunstnikega koos tehtud filmi

Stockholmi Saarlaste Ühingu küünlapäev / Ilari Meerits ; fotod: Mai-Liis Teär

Index Scriptorium Estoniae

Meerits, Ilari

2007-01-01

27. jaanuaril Stockholmi Eesti Majas Mai-Liis ja Jaan Teäre juhtimisel, sellel aastal oli külaliseks Tiiu Valmet, muusikaliste vahepaladega esinesid Charlotte, Carolina, Cecilia, Cassandra ja Alexander

Eesti graafikud Krakówi triennaalil

Index Scriptorium Estoniae

2009-01-01

16. septembril Poolas avatud Krakówi rahvusvahelise graafikatriennaali peanäitusel ja satelliitnäitustel esindavad Eestit Eve Kask, Ülle Marks, Benjamin Vasserman, Tiiu Prisko, Mati Veermets, Evi Tihemets

Katrin Kuldma - obladatelnitsa "Zolotoi iglõ" / Olga Grigorjeva

Index Scriptorium Estoniae

Grigorjeva, Olga, 1983-

2007-01-01

FIBIT-i moepäevadest ja Kuldnõela galast. Kuldnõela nominendid olid Reet Aus, Katrin Kuldma, Marika Siska ja Tiiu Roosma. 2006. a. moepreemia "Kuldnõel" sai kollektsiooni "Chocolat" eest Katrin Kuldma

Kutsega raamatukoguhoidjate read täienevad : kokkuvõte kutse taotlemisest 2016. a / Krista Talvi

Index Scriptorium Estoniae

Talvi, Krista, 1948-

2016-01-01

Raamatukoguhoidja kutsestandardi tase 8 omistati Tiiu Reimole, kes on töötanud raamatukogus ja olnud õppejõud ning töötab praegu Tallinna Ülikooli Akadeemilises Raamatukogus Eesti retrospektiivse rahvusbibliograafia keskuses

Kirev moepilt / Britt Rosen

Index Scriptorium Estoniae

Rosen, Britt, 1968-

2007-01-01

FIBITi moepäevadest Tallinnas Viru keskuses, stilistid Gerli Tinn, Liisi Eesmaa, Kirill Safonov. Kuldnõela auhinna pälvis Katrin Kuldma kollektsiooni Chocolat eest. Oma loomingut esitlesid Reet Aus, Tiiu Roosma, Marika Siska

Karjamaa, pilved... Franz Liiv ja Juhan Kafka / Toomas Raudam

Index Scriptorium Estoniae

Raudam, Toomas, 1947-

1998-01-01

Varem ilmunud: Postimees, 1996, 7.sept. Rets. rmt.: Kafka, Franz. Kirjad Milenale / tlk. Tiiu Relve. Tallinn : Perioodika, 1996. (Loomingu Raamatukogu ; 27-30, 1996; Liiv, Juhan. Mu kallis Liisi / koost. Aarne Vinkel. Tartu : Ilmamaa, 1996

Varakambri lahtine värav / Katrin Kaugver

Index Scriptorium Estoniae

Kaugver, Katrin, 1950-

2008-01-01

Uppsalas toimunud CERL-i (Consortium of European Research Libraries) vanaraamatu seminar "Käsikiri, trükis ja internet", kus TLÜ professor Tiiu Reimo andis ülevaate meie raamatukogude ja arhiivide vanatrükiste kogudest

Dive TeenindusTop : ehituspoodidest parim teenindus Ehitus Service'is / Riin Undusk, Kaspar Jänes

Index Scriptorium Estoniae

Undusk, Riin

2006-01-01

Uuringufirma Dive hindas veebruaris ehituspoodide teenindust, mille käigus selgus, et kõige parem teenindus on Ehitus Service'is. Diagramm. Vt. samas: Tiiu Kütson, Rauno Haabmets. Kindlustunne muudab teenindajad pühendunuks

Kubija Hotell-Loodusspaa = Kubija Hotel-Nature Spa

Index Scriptorium Estoniae

2012-01-01

Võrus Männiku tee 43A asuva Kubija Hotell-Loodusspaa sisekujundusest. Sisearhitektid Tiiu Truus ja Birgit Jaanus (Stuudio Truus). Arhitektid Indrek Tiigi ja Helle-Triin Hansumäe. Loetletud Stuudio Truus tehtud töid

"Neiseri" büroohoone = The Neiser Office Building / Piret Lindpere

Index Scriptorium Estoniae

Lindpere, Piret, 1963-

2003-01-01

2002. a. valminud kontori sisekujundusest. Sisearhitekt Tiiu Truus. Hoone arhitekt Indrek Näkk. Kontorimööbli ja lükanduksed valmistas Võru firma "Private Project". Bürooseintel Rein Kelpmani maalid. Ill.: kontori planeering, 6 vaadet

Eramu interjöör Aaviku elamurajoonis Harjumaal = Interior of a private home, Aaviku / Epp Lankots

Index Scriptorium Estoniae

Lankots, Epp, 1976-

2005-01-01

Aaviku asumi tüüpmaja sisekujunduse kontseptsioon on rajatud vineeri erinevatele kasutusviisidele. Vineeriga on kaetud seinad, laed, vineerist on köögilaud ja selle jalad jm. Sisearhitekt Tiiu Truus. 5 värv. ill

Tartusse tuleb Wilde'i ja Vilde monument

Index Scriptorium Estoniae

1998-01-01

Tartu kesklinnas Wilde Irish Pubi ees peaks 1999. a. kevadel avatama kirjanike Oscar Wilde'i ja Eduard Vilde pronkskujud. Elusuuruses kirjanikud hakkavad istuma graniitistmel. Idee autorid - pubipidaja Liam Allen, ettevõtja Marju Unt, skulptor Tiiu Kirsipuu.

"Matrix" sobitub iga filosoofiaga / Rando Tooming

Index Scriptorium Estoniae

Tooming, Rando

2003-01-01

Andy ja Larry Wachowski ulmefilmide triloogia "Matrix" fenomeni analüüsist ajakirja "Vikerkaar" 2003. aasta 9. numbris, kus sellele on pühendatud nelja filosoofi artiklid ( Slavoj Zhizhek, Jüri Eintalu, Bruno Mölder, Tanel Tammet)

Patient Doses and Risk Evaluation in Bone Mineral Densitometry

International Nuclear Information System (INIS)

Angelucci, M.; Borio, R.; Chiocchini, S.; Degli Esposti, P.; Dipilato, A.C.; Policani, G.

1999-01-01

The aim of this work was to evaluate the equipment dose to the organs and tissues and the effective dose of patients undergoing the most frequent examinations carried out in bone mineral densitometry (BMD): lumbar spine and femur. Experimental measurements of absorbed doses on a Rando phantom, allow comparison of the performances of three different photon emitter facilities. The comparison of the entrance and exit doses measured on a Rando phantom and on 50 female non-obese patients show that entrance doses on Rando can be used as 'diagnostic reference levels' for patients. A quantitative estimate of the stochastic risk due to BMD procedures was made: the results obtained show that the stochastic risk is very low and that the BMD is, at present, the most confirmed procedure for osteoporosis diagnosis and management. (author)

Artur Lemba - tunglakandja : Ühe suurmehe metaelulugu / Ene Metsjärv ; intervjueerinud Marju Riisikamp

Index Scriptorium Estoniae

Metsjärv, Ene, 1943-

2014-01-01

Pianist, helilooja ja pedagoog Artur Lemba elust ja loometööst. A. Lemba õpilaste Veera Lensini, Salme Lohuaru (kuni 1950 Andre), Valentine Riivese, Tiiu Targamaa, Villem Reimanni ja Elsa Avessoni ülestähendusi oma õpetajast

Inimeseksolemise võtmed / Aita Kivi

Index Scriptorium Estoniae

Kivi, Aita, 1954-

2000-01-01

Sisu : Viiu Härm. Duubel kaks; Kurt Vonnegut. Titaani sireenid; Berendt, John. Südaöö hea ja kurja tundmise aias; Fern Michaels. Pühad; Erich Segal. Arstid; Maria Riva. Marlene Dietrich; Tiiu Põld. Märgitud mees

Eesti laste suvi

Index Scriptorium Estoniae

2010-01-01

Laste suvisest koolivaheajast räägivad Eesti omavalitsuse ametnikud ja sotsiaaltöötajad: Kaasi Almers, Inna Kask, Aasa Saarna, Ülle Rajasalu, Merle Leopard, Aime Koger, Margit Pajo, Pilleriin Aalde, Andres Julle ja Tiiu Kuus

Tallinna Lennujaama vana terminali renoveerimine = Renovation of Tallinn Airport's old terminal / Epp Lankots

Index Scriptorium Estoniae

Lankots, Epp, 1976-

2005-01-01

Arhitektid: Andres Põime, Reet Põime, Tiiu Truus. Tallinna Lennujaama reisijateterminali projekteerisid 1939. a. arhitektid Roman Koolmar ja Artur Jürvetson, hoone valmis Paula Koido rekonstrueerimisprojekti järgi. Ill.: 2 värv. sisevaadet, välisvaade

Hüpates üle varju ehk Eesti millenniuminäitused / Henno Väri

Index Scriptorium Estoniae

Väri, Henno

1999-01-01

Ülevaatenäitused 'XX sajandi eesti kunstniku mälestuseks' (kuraator Eha Komissarov, üldkujundaja Jaan Toomik) Eesti Kunstimuuseumi Rüütelkonna hoones ja 'Hingeaeg 1900-2000' (kuraatorid Tiiu Talvistu, Mare Joonsalu) Tartu Kunstimuuseumi Kivisilla Pildigaleriis.

Häbi, professor, teil on Gefilus kapis / Eve Kruuse

Index Scriptorium Estoniae

Kruuse, Eve,d1959-

2008-01-01

Tartu Ülikooli professor Marika Mikelsaar võitis läinud kuul koos kolleegidega (Tiiu Kullisaar, Epp Songisepp, Hedi Annuk ja Mihkel Zilmer) Soulis ülemaailmse naisleiutajate konkursil ME-3 bakteri avastamise ja probiootikuks arendamise eest kuldmedali

"Külvaja" kui maaelu "Oscar" / Silja Lättemäe

Index Scriptorium Estoniae

Lättemäe, Silja, 1952-

2006-01-01

Ferdi Sannamehe 1927. a. valminud pronksskulptuuri "Külvaja" vähendatud koopiast, mis antakse Aasta Põllumehe konkursi võitjale esmakordselt 2006. a. Koopia modelleerija Tiiu Kirsipuu. Theodor Poolile 1928. a. kingitud originaalkujul tekst " Riigivanemalt parimale talumajapidamisele Eestis"

Hoone nagu üllatusmuna

Index Scriptorium Estoniae

2009-01-01

2009. a. jaanuaris Tallinnas Vene t. 22 taasavatud Vanalinna Hariduskolleegiumi gümnaasiumi koolimajast. Remonditi ja restaureeriti kõik siseruumid, fassaad, katus ja siseõu. Projekteerija: Amhold AS. Restaureerimisprojekti arhitektuurse osa autor Marie Hammer, sisearhitekt Tiiu Lõhmus

Tartlased andsid oma panuse elamise kunsti / Krista Piirimäe

Index Scriptorium Estoniae

Piirimäe, Krista, 1946-

2007-01-01

Eesti Kunstnike Liidu aastanäitusest "Elamise kunst" Tallinna Kunstihoones. Pikemalt Ilmar Kruusamäe, Markus Kasemaa, Saskia Kasemaa, Andrus Kasemaa, Silver Vahtre, Anne Parmasto, Meiu Mündi, Tiiu Kirsipuu näitusel eksponeeritud töödest

Filmipäevad lõpetas "Magnus" / Kristiina Davidjants

Index Scriptorium Estoniae

Davidjants, Kristiina, 1974-

2008-01-01

Eesti filmipäevadel Kinomajas autasustas Eesti Kinoliit aastapreemiaga Sulev Keeduse dokumentaalfilmi "Jonathan Austraaliast" ja noorte- ja tudengifilmi auhinna sai Vanalinna hariduskolleegiumi teatriklassi noorte film "Pablo ja Tiiu". Näidati ka kohtutõkendi alust Kadri Kõusaare filmi "Magnus"

Narva Joaoru puhkeala ja rannahoone = Narva Joaoru Recreational Area and Beach House / Kalle Vellevoog

Index Scriptorium Estoniae

Vellevoog, Kalle, 1963-

2016-01-01

Narva Joaoru puhkeala ja rannahoone. Arhitektid Kalle Vellevoog, Martin Prommik, Andrus Andrejev (Arhitektuuribüroo JVR), Tiiu Truus (Stuudio Truus). Konstruktsioon Ahti Lääne, Jürgen Einpaul (inseneribüroo EstKonsult). Eesti Arhitekide Liidu aastapreemia nominent 2016

Taas teadmusühiskonna infopoliitikast / Silvi Metsar

Index Scriptorium Estoniae

Metsar, Silvi

2004-01-01

RRis toimunud II infopoliitika foorumil "Riiklik infopoliitika - müüt või tegelikkus" arutleti, kas Eestis on infoühiskond, milline on riiklik infopoliitika jne. Teiste seas osalesid Anu Toots, Tiiu Valm, Peeter Tulviste, Jaak Aaviksoo, Raul Malmstein

Kadriorus voolivad mitme maa skulptorid jääst kujusid / Tatjana Bratoljubova

Index Scriptorium Estoniae

Bratoljubova, Tatjana

2008-01-01

Kadrioru pargi 290. sünnipäeva puhul loovad kunstnikud Tallinnas Luigetiigi ääres jääskulptuure. Taieseid teostavad Kate Robinson Shotimaalt, Natalia Tshistjakova ja Jevgeni Zavjalov Peterburist ning Tiiu Kirsipuu, Ekke Väli ja Kalle Pruuden Eestist

Ed & Os : kahe Wilde näitemäng / Mati Unt

Index Scriptorium Estoniae

Unt, Mati, 1944-2005

1998-01-01

Mati Undi näidend Eduard Vilde ja Oscar Wilde'i kohtumisest. Illustratsiooniks Tiiu Kirsipuu Tartusse Wilde Irish Pubi ette loodava skulptuurigrupi kavand. Autori märkus : Tekst on kirjutatud Kahe Wilde Pubi avamiseks ja koostatud Wilde'i ja Vilde tekstidest.

Kuldma, Aus, Roosma ja Siska

Index Scriptorium Estoniae

2007-01-01

2006. aasta Kuldnõela võitja kuulutatakse välja Tallinnas Viru keskuses 9.03.2007. Kandidaadid Katrin Kuldma kollektsiooniga Chocolate, Reet Aus kaubamärgiga Re Use, Tiiu Roosma pesukollektsiooniga BonBon Lingerie ja Marika Siska kaubamärgiga Sangar

Pühendumusuuringute tegemine pole levinud / Kai Vare

Index Scriptorium Estoniae

Vare, Kai, 1968-

2004-01-01

Reval Hotelligrupp AS-is ja Saku Õlletehases läbi viidud töötajate rahulolu-uuringutest. Kommenteerivad Mari-Liis Eensalu, Kai Prinits ja Tiiu Vilms. Vt. samas: Narva Elektrivõrkudes töötavad Euroopa pühendunuimad inimesed

Lennujaama kontor nüüd nõukogudeaegses terminalis / Kai Ilustrumm

Index Scriptorium Estoniae

Ilustrumm, Kai

2004-01-01

Tallinna Lennujaama hoone rekonstrueerimine läks maksma üle 20 milj. Eesti krooni. Kolmandiku hoonest hõlmavad kontoriruumid, ülejäänud osa saab kasutada mitmesuguste ürituste teenindamiseks. Renoveerimisplaani kavandasid Andres ja Reet Põime, sisekujunduse Tiiu Raudsepp-Truus

Delta Plaza kohvik = The Delta Plaza Café / Margit Mutso

Index Scriptorium Estoniae

Mutso, Margit, 1966-

2010-01-01

Tallinnas Pärnu mnt. 141 asuva kohviku Delta Plaza sisekujundusest. Sisearhitektid Tiiu Truus ja Marja Viltrop (Stuudio Truus OÜ). Hoone arhitektid Jüri Okas ja Marika Lõoke (AB J. Okas & M. Lõoke). Žürii liikme Mait Summataveti arvamus kohvikust

Pettuse kunst / Olga Gretsiskina

Index Scriptorium Estoniae

Gretsiskina, Olga

2001-01-01

Kunstivõltsingutest Eestis (A. Vabbe, O. Maran, J. Köler, K. Mägi) ja mujal. Kunstigalerii Rios omanike Jelena ja Valeri Tsurkani tööst võltsingute avastamisel. Tiiu Talvistu ja anonüümse võltsingutega äritseja kommentaar

Kujurid ei olegi nikerdajad / Aarne Mäe

Index Scriptorium Estoniae

Mäe, Aarne, 1967-

1998-01-01

Sümpoosioni 'Puu '98' (korraldaja Heiki Kongi) raames Sagadis toimunud puuskulptuuride valmistamisest, kus osalesid Aime Kuulbusch, Aili Vahtrapuu, Hille ja Lembit Palm, Urmas Rauba, Tiiu Kirsipuu, Steve Lester, ning mille tulemusi eksponeeritakse koos Valga- ja Pärnumaal valminutega Rocca al Mares

Esimene Eesti maja Hiinas = The first Estonian house in China / Andres Põime, Lauri Vaimel ; interv. Triin Ojari

Index Scriptorium Estoniae

Põime, Andres

2008-01-01

Vestlus Pekingi Eesti saatkonna arhitektuurikonkursi võidutöö autoritega. Tulemused: I preemia - Andres Põime, Lauri Vaimel, II - Erik Nobel, Christian Jensen, Kristen Herup Sovang, Soren Andersson, Pille Kivihall, Dan Ljungar, Hans Willadsen (Taani), III - Kalle Vellevoog, Velle Kadalipp, Tiiu Truus, Martin Prommik

Näitused Sagadis ja Palmses

Index Scriptorium Estoniae

2003-01-01

Sagadis eksponeeritakse hollandi poeedi, esseisti ja fotograafi Rommert Boonstra fotonäitust "Flowering inferno" ja maalikunstnik Tiiu Ahmani meremaale. Palmse mõisas Valli Lember-Bogatkina akvarellide näitus. Karepal Sagritsa muuseumis saab vaadata V. Lember-Bogatkina 1985. a. Kuuba reisi muljeid

Hea õpetamise grandi saajad

Index Scriptorium Estoniae

2016-01-01

Õpetamise uurimist alustavad grandi toel Andrus Org, Riina Oruaas, Natalja Zagura (humanitaar- ja kunstide valdkond), Stefano Braghiroli, Aet Kiisla, Tiiu Taur (sotsiaalteadused), Marje Oona, Oivi Uibo, Daisy Volmer (meditsiinitead.), Svetlana Ganina, Natalja Lepik ja Raivo Raid (loodus- ja täppistead.)

Helsingi loomaaia jääskulptuuridest valiti parimad

Index Scriptorium Estoniae

2004-01-01

Soomes Korgeasaaris lõppes jääskulptuurivõistlus. Võitjad. Esikohatöö autorid olid Steve Lester Ameerikast ja Ljudmila Lester Venemaalt. Eestist osalesid ühel võistlusel Lembit Palm ja Jaak Soans ning teisel võistlusel Tiiu Kirsipuu ja Aime Kuulbusch

Modernismi nauding vaatamiseks : elamu Pärnus Seedri tänaval = Modernism as Eye Candy : Residence in Seedri St, Pärnu / Urmas Oja

Index Scriptorium Estoniae

Oja, Urmas, 1981-2012

2007-01-01

Külaliskortermaja Seedri 4 Pärnus. Arhitektuur: AB JVR. Autor Kalle Vellevoog, kaasautor Margus Tamm. Konstruktor Ahti Lääne (OÜ EstKONSULT). Sisekujundaja Tiiu Truus. Maastikuarhitekt Vaike Parker. Projekt: 2005, valmis: 2007. Ill.: IV korruse plaan, 5 värv. vaadet

Kas teha konteinerklass? / Raivo Juurak

Index Scriptorium Estoniae

Juurak, Raivo, 1949-

2011-01-01

Koolikorraldusest ja koolidesse vastuvõtust Soomes, Saksamaal ja Inglismaal. Arvamusi avaldavad Soomes õpetajana töötavad Tiiu Jürisson ja Arvi Nikkarev, pikaajalise Soomes töötamise kogemusega TLÜ lektor Anu Carlsson ning Saksamaal Hessenis õpetajana töötav Kadri Heller

Täna õhtul kohtuvad Harju mäel tuli ja jää / Siiri Suutre

Index Scriptorium Estoniae

Suutre, Siiri

2007-01-01

Tallinna valgusfestivali raames toimub 10.02.2007 Harjumäel tule ja jää pidu. Korraldaja Indrek Leht. Tuleinstallatsiooni "Born to fly" autorid leedu kunstnikud Kestutis ja Vytautis Musteikis, jääskulpuuride autorid Tiiu Kirsipuu, Kalle Pruuden, Aime Kuulbusch ja Üllar Kallau

Kirjakunstinäitus rändab

Index Scriptorium Estoniae

2004-01-01

Viljandi kirjakunstiklubi Mary seitsme aasta tööde rändnäitus alustas Jakobsoni koolis. Klubi juhataja Mary Mauring. Väljapanekut kujundasid Kadri Papagoi, Kairi Ritson, Tiiu Väli, Aita Leemet ja Ants Tõnisalu, kes on ka paljude tööde autorid

Wõro keskus = Wõro Centre / Ilmar Jalas

Index Scriptorium Estoniae

Jalas, Ilmar, 1954-

2001-01-01

Võrus Jüri t. 22a asuva ärihoone projekteeris Arhitektuuribüroo JVR. Arhitekt Ilmar Jalas, kaasa töötas Andrus Andrejev. Konstruktsioonid: Jaan Port, eriosad: Tiiu Välba. Projekt 2000-2001, hoone valmis 2001. 7 ill.: asendiplaan, korruste plaanid, välisvaated

Vanalinna Hariduskolleegiumi Gümnaasiumi õppehoone restaureerimine = Restoration of the academic building of the Old Town Educational College / Margit Mutso

Index Scriptorium Estoniae

Mutso, Margit, 1966-

2009-01-01

Tallinnas Vene 22 asuva hoone muinsuskaitse eritingimused koostas Aleksandr Pantelejev. Arhitekt Marie Hammer, sisearhitekt Tiiu Lõhmus (Vana Tallinn), arheoloog Villu Kadakas ja muinsuskaitselist järelevalvet teostanud Helve Ilves pälvisid restaureerimistöö eest arhitektuuri sihtkapitali aastapreemia 2008. Žürii hinnang

Plaadid / Tiiu Laks

Index Scriptorium Estoniae

Laks, Tiiu, 1984-

2007-01-01

Uutest heliplaatidest The Shins "Wincing The Night Away", A Am Kloot "BBC Radio 1Peel Sessions", Tim Finn "Imaginary Kingdom", Kling Klang "The Esthetik of destruction", "25 Avenue le bar plaza Athenee Paris", Paul Weller "Hit Parade"

Plaadid / Tiiu Laks

Index Scriptorium Estoniae

Laks, Tiiu, 1984-

2006-01-01

Uutest heliplaatidest Arctic Monkeys "Whatever People Say I Am", Dreamphish "Happiness Happens", Viktoria Tolstoy "My Sweadish Heart", Ursula Rucker "Ma'at Mama", Sissel "Into Paradise", Blacky "See on me meeltele", "Alternating Current 2"

Plaadid / Tiiu Laks

Index Scriptorium Estoniae

Laks, Tiiu, 1984-

2008-01-01

Uutest heliplaatidest Lightspeed Champion "Falling Off The Lavender Bridge", Sebastian Bach "Angel Down", Juanes "La Vida...", raadi Maria "Siin Tallinn", Erich Krieger "Live", Rock Hotel "Rock Hotel Rock Cafes"

Plaadid / Tiiu Laks

Index Scriptorium Estoniae

Laks, Tiiu, 1984-

2006-01-01

Uutest plaatidest The Scaramangas "All Is Good Now", Jim Weider "Percolator", Think Of One "Tarfico", Primal Scream "Riot City Blues", Wochtzchee "Diktüoneemikalt", The Feeling "Tweöve Stops And Home", Sunblock "I'll Be Ready",

Raamat väikerahvaste terminoloogiast / Tiina Leemets

Index Scriptorium Estoniae

Leemets, Tiina

1994-01-01

Rahvusvahelise terminoloogiainstituudi IITF-i väljaande "Terminology Science and Research" väikekeelte terminoloogia olukorrale pühendatud erinumbrist (nr. 2/1991), kus käsitletakse eesti (Tiiu Erelt, Henn Saari), läti, leedu, ukraina, lapi, islandi, mänksi, iiri, katalaani ja baski oskuskeelt

Iga aastaga uus mälestuste tuba / Lii Sammler

Index Scriptorium Estoniae

Sammler, Lii, 1963-

2008-01-01

Sargvere Mõisa Ajalootoad registreeriti 2007. a. kevadel kui Sargvere Maakultuuri Edendamise Seltsi museum. Muuseumitube tutvustab giid Sale Talviste. Talutoa seina kaunistavad Andres Pleesi jäädvustatud Sargvere lood. 2006. a. ilmus S. Talviste koostatud raamat "Muistsete aegade lood Sargverest". Järvamaa muuseumi juhataja Tiiu Saaristi kommentaar

Koolid saavad tagasi algusaegade väärikuse / Mari Rebane

Index Scriptorium Estoniae

Rebane, Mari

2003-01-01

Artur Perna projekteeritud Tallinna 21. keskkooli hoone renoveerimisprojekti autor on Raul Järg, sisekujundaja Toomas Korb, lühtrite disainer Tõnis Vellama. Edgar Johan Kuusiku projekteeritud Lenderi tütarlastegümnaasiumi (Tallinna kesklinna vene gümnaasium) renoveerimisprojekti autor on Andres Põime, sisekujundaja Tiiu Truus

Parimad ruumid ja asjad : ESL aastapreemiad 2002 / Tarmo Piirmets

Index Scriptorium Estoniae

Piirmets, Tarmo

2003-01-01

Publitsistikapreemia - Jüri Kermiku monograafia "A. M. Luther 1877-1940", parim ajalooline interjöör - presidendi kantselei, sisearh. Juta Lember, parim kaasaegne interjöör - mööblifirma "Neiser" kontor, sisearh. Tiiu Truus, esemepreemia - mööbliseeria "FlixFlax", disainer Ivari Männi

Kultuurkapitali arhitektuuri sihtkapitali aastapreemiad 2002 / Piret Lindpere

Index Scriptorium Estoniae

Lindpere, Piret, 1963-

2002-01-01

Aastapreemia: Eesti arhitektuuripoliitika töögrupp (13 nime), objektipreemia: Jüri Okas (Mardi talu), sisekujunduspreemia: Tiiu Truus (Neiseri kontor), restaureerimispreemia: Juta Lember (EV Presidendi Kantselei esindusruumid), urbanistikapreemia: Villem Tomiste, tegevuspreemia: Jüri Kermik ("A. M. Luther 1877-1940"), Andres Kurg ja Mari Laanemets ("Tallinna juht").

Suurejooneline minimalism Nõmmel / Maris Takk

Index Scriptorium Estoniae

Takk, Maris

2006-01-01

Tallinnas Nõmmel asuva eramu (arhitekt Emil Urbel) sisekujundus. Sisearhitekt Tiiu Truus. Enamus mööblist on T. Truusi kavandatud. T. Truusist, tema tähtsamad tööd. Ill.: värv. portreefoto T. Truusist, I ja II korruse plaan, 15 värv. vaadet

Naismaalijate abstraktsioon ja empaatia / Reet Varblane

Index Scriptorium Estoniae

Varblane, Reet, 1952-

2003-01-01

Tartu Kunstimajas näitus "Abstraktsioon ja empaatia. Kristiina Kaasik, Lola Liivat, Helina Loid (sünd. 1982), Tiiu Pallo-Vaik, Mall Paris, Anne Parmasto, Mari Roosvalt, Sirje Runge, Tiina Tammetalu, Margi Vähi (sünd. 1975)". Kuraator ja väljapaneku kujundaja Reet Varblane

Navodnenija v umah zactroishtshikov / Maris Kuuda

Index Scriptorium Estoniae

Kuuda, Maris

2007-01-01

Kohalikel omavalitsustel pole piisavalt hoobasid sundida arendajaid üleujutusohuga arvestama. Pärnusse hotelli September rajajad (arhitektid Emil Urbel, Andrus Mark) arvestavad ujutusohuga. Arvamust avaldavad Rene Reisner, Mari Sepp, Ülo Sults, Karri Tiigisoon, Indrek Rannik, Mark Soosaar, Tiiu Pärn, Merle Looring, Rita Sepp, Kaspar Alles

Kasvatusteaduslike tööde konkursi tulemused / Ulve Kala

Index Scriptorium Estoniae

Kala, Ulve, 1947-

2002-01-01

Eesti keeles publitseeritud teadustöö preemia anti Aleksander Elangole, Inger Kraavile ja Kristi Kõivule, diplom Ühiskondlikule Pedagoogika Uurimise Instituudile, Viivi Ekstale, Inger Kraavile, Inge Undile, Viivi Maansole. Võõrkeeles publitseeritud teadustöö preemia monograafiale "Integration als Problem in der Erziehungswissenschaft" (koostaja Airi Liimets, autorid Airi Liimets, Saila Anttonen, Gunnar Bergendal, Gerd-Bodo Reinert von Carlsburg, Helmut Wehr, Tiiu Kuurme, Pauli Siljander, Jüri Kruusvall, Sirje Priimägi, Ene-Silvia Sarv, Kristi Kõiv, Meri-Liis Laherand, Jaan Mikk, Hannele Niemi, Marika Veisson, Irina Würscher, Susanne Jena, Tiina Aunin, Reet Liimets, Heli Mattisen, Aivo Saar, Maie Vikat), diplom Aino Saarele ja Katrin Niglasele. Didaktilis-rakenduslike tööde preemia Eda Heinlale, Estelle Laanele ja Kalle Laanele, Tiiu Kadajasele. Populaarteadusliku töö preemia Maie Tuulikule, diplom Kristi Kõivule. H. Liimetsa nim magistritööde preemia Rain Mikserile, Margus Pedastele, Ülle Rannutile, Inger Kraavile, Tago Sarapuule, Martin Ehalale

Fin de siecle, Beat Generation / Rando Tooming

Index Scriptorium Estoniae

Tooming, Rando

2002-01-01

Dokumentaalfilm kolmest biitnikute ideoloogist-kirjanikust Jack Kerouac'ist, William S. Burroughs'st ja Allen Ginsburgist "Hipid ja biitnikud" ("The Source") : režissöör Chuck Workman : Ameerika Ühendriigid 1998

Ökokunst Viljandi "Kiriküüdil" / Johannes Saar

Index Scriptorium Estoniae

Saar, Johannes, 1965-

2002-01-01

Lõppes seitsmes ökoteemaline "Kiriküüt". Ürituse organiseerijate eesotsas on pikemalt olnud Tiiu Männiste ja Mari Sobolev. Jakobsoni kuju juures kandsid kirikuõpetaja Mart Salumäe ja "Ugala" direktor Jaak Allik ette rühmituse VSN performance'i "Mulgi näide". Ökoloogiast

Radiation protection of staff in 111In radionuclide therapy--is the lead apron shielding effective?

Science.gov (United States)

Lyra, M; Charalambatou, P; Sotiropoulos, M; Diamantopoulos, S

2011-09-01

(111)In (Eγ = 171-245 keV, t1/2 = 2.83 d) is used for targeted therapies of endocrine tumours. An average activity of 6.3 GBq is injected into the liver by catheterisation of the hepatic artery. This procedure is time-consuming (4-5 min) and as a result, both the physicians and the technical staff involved are subjected to radiation exposure. In this research, the efficiency of the use of lead apron has been studied as far as the radiation protection of the working staff is concerned. A solution of (111)In in a cylindrical scattering phantom was used as a source. Close to the scattering phantom, an anthropomorphic male Alderson RANDO phantom was positioned. Thermoluminescent dosemeters were located in triplets on the front surface, in the exit and in various depths in the 26th slice of the RANDO phantom. The experiment was repeated by covering the RANDO phantom by a lead apron 0.25 mm Pb equivalent. The unshielded dose rates and the shielded photon dose rates were measured. Calculations of dose rates by Monte Carlo N-particle transport code were compared with this study's measurements. A significant reduction of 65 % on surface dose was observed when using lead apron. A decrease of 30 % in the mean absorbed dose among the different depths of the 26th slice of the RANDO phantom has also been noticed. An accurate correlation of the experimental results with Monte Carlo simulation has been achieved.

Radiation protection of staff in 111In radionuclide therapy-Is the lead apron shielding effective?

International Nuclear Information System (INIS)

Lyra, M.; Charalambatou, P.; Sotiropoulos, M.; Diamantopoulos, S.

2011-01-01

111 In (Eγ=171-245 keV, t1/2=2.83 d) is used for targeted therapies of endocrine tumours. An average activity of 6.3 GBq is injected into the liver by catheterisation of the hepatic artery. This procedure is time-consuming (4-5 min) and as a result, both the physicians and the technical staff involved are subjected to radiation exposure. In this research, the efficiency of the use of lead apron has been studied as far as the radiation protection of the working staff is concerned. A solution of 111 In in a cylindrical scattering phantom was used as a source. Close to the scattering phantom, an anthropomorphic male Alderson RANDO phantom was positioned. Thermoluminescent dosemeters were located in triplets on the front surface, in the exit and in various depths in the 26. slice of the RANDO phantom. The experiment was repeated by covering the RANDO phantom by a lead apron 0.25 mm Pb equivalent. The unshielded dose rates and the shielded photon dose rates were measured. Calculations of dose rates by Monte Carlo N-particle transport code were compared with this study's measurements. A significant reduction of 65 % on surface dose was observed when using lead apron. A decrease of 30 % in the mean absorbed dose among the different depths of the 26. slice of the RANDO phantom has also been noticed. An accurate correlation of the experimental results with Monte Carlo simulation has been achieved. (authors)

Suur rahvusvaheline välisbalti arhiivide konverents südasuvises Tartus / Mai Raud-Pähn ; fotod Madis Laas

Index Scriptorium Estoniae

Raud-Pähn, Mai, 1920-

2006-01-01

Ettekannetega esinesid: Tiiu Kravtsev, Riina Reinvelt, Juta Kivimäe, Piret Noorhani, Merike Kiipus, Anu Korb, Anne Valmas, Mihkel Volt, Mare Rand, Inga Kuljus, Enn Mainla, Roland Weiler, Teas Tanner, Tiina Kirss, Jüri Kivimäe, Enda-Mai Michelson-Holland, Andrae, Carl Göran, Katrin Meerits ja Maie Barrow

Mentor riietab hinge lahti

Index Scriptorium Estoniae

2008-01-01

Küsimusele, mida ootavad mentorid neilt, kellele nad toeks astuvad, vastavad Nelli Sudnitsõna, Jaan Allem, Anti Orav, Erkki Susi, Margus Rink, Aavo Kokk, Janeck Uibo. Lisa: Fontese mentoriprogramm - esimene omalaadne Eestis. Kommenteerivad Tiiu Allikvee ja Piret Jamnes. Vt samas: Mida arvavad asjast menteed? Kommenteerivad Kaidi Kuusmaa ja Gristel Tali

Elamu Viimsis = Dwelling in Viimsi / Triin Ojari

Index Scriptorium Estoniae

Ojari, Triin, 1974-

2004-01-01

Valge modernistlik eramu suure päikeseterrassiga ülakorrusel. Projekteerija: Arhitektuuribüroo JVR. Autor Kalle Vellevoog, sisekujundaja Tiiu Truus (Studio-3), konstruktor Jaan Port. Projekt 2002, valmis 2003. Üldpind 260 mø. Ill.: I ja II korruse plaan, 3 välis- ja 3 sisevaadet, värv

SU-F-BRE-04: Construction of 3D Printed Patient Specific Phantoms for Dosimetric Verification Measurements

International Nuclear Information System (INIS)

Ehler, E; Higgins, P; Dusenbery, K

2014-01-01

Purpose: To validate a method to create per patient phantoms for dosimetric verification measurements. Methods: Using a RANDO phantom as a substitute for an actual patient, a model of the external features of the head and neck region of the phantom was created. A phantom was used instead of a human for two reasons: to allow for dosimetric measurements that would not be possible in-vivo and to avoid patient privacy issues. Using acrylonitrile butadiene styrene thermoplastic as the building material, a hollow replica was created using the 3D printer filled with a custom tissue equivalent mixture of paraffin wax, magnesium oxide, and calcium carbonate. A traditional parallel-opposed head and neck plan was constructed. Measurements were performed with thermoluminescent dosimeters in both the RANDO phantom and in the 3D printed phantom. Calculated and measured dose was compared at 17 points phantoms including regions in high and low dose regions and at the field edges. On-board cone beam CT was used to localize both phantoms within 1mm and 1° prior to radiation. Results: The maximum difference in calculated dose between phantoms was 1.8% of the planned dose (180 cGy). The mean difference between calculated and measured dose in the anthropomorphic phantom and the 3D printed phantom was 1.9% ± 2.8% and −0.1% ± 4.9%, respectively. The difference between measured and calculated dose was determined in the RANDO and 3D printed phantoms. The differences between measured and calculated dose in each respective phantom was within 2% for 12 of 17 points. The overlap of the RANDO and 3D printed phantom was 0.956 (Jaccard Index). Conclusion: A custom phantom was created using a 3D printer. Dosimetric calculations and measurements showed good agreement between the dose in the RANDO phantom (patient substitute) and the 3D printed phantom

SU-F-BRE-04: Construction of 3D Printed Patient Specific Phantoms for Dosimetric Verification Measurements

Energy Technology Data Exchange (ETDEWEB)

Ehler, E; Higgins, P; Dusenbery, K [University of Minnesota, Minneapolis, MN (United States)

2014-06-15

Purpose: To validate a method to create per patient phantoms for dosimetric verification measurements. Methods: Using a RANDO phantom as a substitute for an actual patient, a model of the external features of the head and neck region of the phantom was created. A phantom was used instead of a human for two reasons: to allow for dosimetric measurements that would not be possible in-vivo and to avoid patient privacy issues. Using acrylonitrile butadiene styrene thermoplastic as the building material, a hollow replica was created using the 3D printer filled with a custom tissue equivalent mixture of paraffin wax, magnesium oxide, and calcium carbonate. A traditional parallel-opposed head and neck plan was constructed. Measurements were performed with thermoluminescent dosimeters in both the RANDO phantom and in the 3D printed phantom. Calculated and measured dose was compared at 17 points phantoms including regions in high and low dose regions and at the field edges. On-board cone beam CT was used to localize both phantoms within 1mm and 1° prior to radiation. Results: The maximum difference in calculated dose between phantoms was 1.8% of the planned dose (180 cGy). The mean difference between calculated and measured dose in the anthropomorphic phantom and the 3D printed phantom was 1.9% ± 2.8% and −0.1% ± 4.9%, respectively. The difference between measured and calculated dose was determined in the RANDO and 3D printed phantoms. The differences between measured and calculated dose in each respective phantom was within 2% for 12 of 17 points. The overlap of the RANDO and 3D printed phantom was 0.956 (Jaccard Index). Conclusion: A custom phantom was created using a 3D printer. Dosimetric calculations and measurements showed good agreement between the dose in the RANDO phantom (patient substitute) and the 3D printed phantom.

Eestis võltsitakse kunsti / Pekka Erelt

Index Scriptorium Estoniae

Erelt, Pekka, 1965-

2000-01-01

25. X 1999 kunstiagentuuri Haus oksjonil Anne Luigele müüdud Elmar Kitse õlimaal "Tants" on tõenäoliselt võltsing. Maie Raitari, Mai Levini, Tiiu Talvistu, Saskia Kasemaa, Jüri Kuuskemaa, Silvia Jõgeveri, Valve Janovi arvamused. Maali värvide keemilise analüüsi teeb EKMi restauraator Alar Nurkse.

Millele pöörate eluaseme ostmisel ja üürimisel tähelepanu?

Index Scriptorium Estoniae

2005-01-01

Küsimusele vastavad Brüsselis tööd otsiv Kadri Kuusk, Sampo Panga koolitusosakonna juhataja Külli Meier, finantsinspektsiooni osakonnajuhataja Andre Nõmm, Riigikogu liige Meelis Atonen, Palivere lastekodu juhataja Külle Saar, Helsingis töötav arst Jaak Kiviloog, Narva kooliõpetaja Julia Ivanova, maksu- ja tolliameti peaspetsialist Tiiu Kilk

Arhitektuuriaasta parimad / Piret Lindpere

Index Scriptorium Estoniae

Lindpere, Piret, 1963-

2003-01-01

EK arhitektuuri sihtkapitali aastapreemiad 2002: suur preemia: Eesti arhitektuuripoliitika töögrupp (13 nime), objektipreemia: Jüri Okas (Mardi talu), sisekujunduspreemia: Tiiu Truus (Neiseri kontor), restaureerimispreemia: Juta Lember (EV Presidendi kantselei esindusruumid), urbanistikapreemia: Villem Tomiste, tegevuspreemia: Jüri Kermik ("A. M. Luther 1877-1940"), Andres Kurg ja Mari Laanemets ("Tallinna juht")

Vabaduse väljakul vaadatakse irooniaga Ameerikale ja Eestile / Ants Juske

Index Scriptorium Estoniae

Juske, Ants, 1956-2016

2009-01-01

Maalikunstnik Valeri Vinogradovi Ameerikast inspireeritud isikunäitus "American Beauty" Tallinna Kunstihoone galeriis 13. detsembrini 2009. Maastiku maalimisel on kunstnik kasutanud Anne Parmasto abi. Tallinnas Vabaduse Galeriis 5. jaanuarini 2010 avatud Tiiu Kirsipuu isikunäitus "Rollimäng", mis mängib näitlejate Tõnu Aava ja Andres Dvinjaninovi rollidega

Mitte uhke, vaid omanäoline ja hubane / Ell-Maaja Randküla

Index Scriptorium Estoniae

Randküla, Ell-Maaja, 1939-2016

2005-01-01

Tallinnas Aaviku elurajoonis asuva eramu sisekujundus. Sisearhitekt Tiiu Truus, AB Studio 3. Ehitaja: KMG Ehitus. Põrandad on betoonist, viimistlusmaterjalideks vineer, plekk ja mööblilinoleum. T. Truus on kavandanud ka osa mööblist. T. Truusist, tema tähtsamad tööd. Ill.: 2 plaani, 9 värv. vaadet

München ei ole ainult Oktoberfest / Albert Trapeezh

Index Scriptorium Estoniae

Trapeež, Albert, pseud., 1947-

2005-01-01

Eesti nüüdiskunsti näitusest Müncheni kunstikeskuses Aktionsforum. Osalesid Siim-Tanel Annus, Jaan Elken, Jüri Kass, Ülle Marks, Eve Kask, Lennart Mänd, Tiiu Kirsipuu, Leonhard Lapin, Raul Meel, Liina Siib, Andres Tolts ja Urmas Viik. Näituse kataloogi eestipoolsed tekstid kirjutas Harry Liivrand. Müncheni moodsaimast kunstikeskusest Pinakothek der Moderne'ist

Pansionaat Pärnus : Seedri 4 = Pension in Pärnu : Seedri 4 / Liina Jänes

Index Scriptorium Estoniae

Jänes, Liina, 1977-

2008-01-01

Arhitekt Kalle Vellevoog, kaasa töötas Margus Tamm. Sisearhitekt Tiiu Truus. Maastikuarhitekt Vaike Parker. Konstruktor Ahti Lääne. Peatöövõtja: YIT Ehitus AS. Eesti Kultuurkapitali arhitektuuri sihtkapitali 2007. a. arhitektuuripreemia. Žürii liikme Marika Lõokese arvamus. Asendi- ja II korruse plaan, lõige, 3 värv. välisvaadet, sisevaade

Miks koolis diskrimineeritakse poisse? / Raivo Juurak

Index Scriptorium Estoniae

Juurak, Raivo, 1949-

2015-01-01

Eelmisel aastal peetud soolise võrdõiguslikkuse konverentsi sõnumiks on, et Eesti koolis diskrimineerivad õpetajad poisse. Küsimusele, kuidas poisid tüdrukutele järele aidata, vastavad Tallinna prantsuse lütseumi õpetaja Anneli Oidsalu, TLÜ kasvatusteaduste õppejõud Tiiu Kuurme, psühholoog Tiia Lister, haridustöötaja Enn Veesalu ja õpetaja Lembit Jakobson

Eestit esindab Venezia biennaalil 21. sajandi eramute kõrgmood / Tanel Veenre

Index Scriptorium Estoniae

Veenre, Tanel, 1977-

2010-01-01

27. augustil avatakse 12. Venezia arhitektuuribiennaalil "Inimesed kohtuvad arhitektuuris" (üldkuraator Kazuyo Sejima) Eesti väljapanek "100 maja / houses", mille komissar on Ülar Mark, kuraator Karen Jagodin, autorid Kalle Vellevoog, Tiiu Truus, Martin Pedanik ja Karen Jagodin. Lisaks 21. sajandi eramutele on ekspositsiooni lisatud valik ikoonilise tähendusega eramuid esimese Eesti Vabariigi ja nõukogude ajast

100 maja Veneetsias / Karen Jagodin

Index Scriptorium Estoniae

Jagodin, Karen, 1982-

2010-01-01

Eesti väljapanekust "100 maja / houses" (komissar Ülar Mark, kuraator Karen Jagodin, autorid Kalle Vellevoog, Tiiu Truus, Martin Pedanik, Karen Jagodin) 12. Venezia arhitektuuribiennaalil "Inimesed kohtuvad arhitektuuris" (üldkuraator Kazuyo Sejima). Lisaks 21. sajandi eramutele on ekspositsioonis valik märgilise tähendusega eramuid Eesti Vabariigi ajast aastatel 1918-1940 ja nõukogude ajajärgust

Round-table discussion at Tallinn City Council (March 8, 2010). Part one : The European Union strategy for the Baltic Sea Region - a challenge for cooperation on local and regional levels

Index Scriptorium Estoniae

2010-01-01

Konverentsi ümarlaual võtsid sõna Erik Terk, Toomas Vitsut, Thomas Johansson, Katrin Savomägi, Jasmin Etelämäki, Edvins Karnitis, Ulf Johansson, Per Gudmund Lindencrona, Mika Keränen, Uno Aldegren, Georg Sootla, Heikki Telakivi, Piret Hedin, Mart Repnau, Jüri Riives, Madis Kanarbik, Enn Saar, Tiiu Evert, Galina Gribanova, Keijo Sahrman, Linda Talve

Publikuarmastus hotellitubades / Tiiu Laks

Index Scriptorium Estoniae

Laks, Tiiu, 1984-

2011-01-01

NU Performance Festival IV: Külalislahkusest / On Hospitality Tallinnas Viru hotellis 7.-10.11. 2011, kuraatorid Silke Bake ja Peter Stamer (Saksamaa). Heine Røsdal Avdali ja Yukiko Shinozaki lavastusest "Field Works - hotel". Kümne riigi kunstniku etendatavast performance'ist "The Love Piece"

Taaskasutusest armastusega / Tiiu Suvi

Index Scriptorium Estoniae

Suvi, Tiiu

2006-01-01

Tuuliki Peili loomingulistest rõivastest, mis kannavad silti "Humana Disain" ning on valmistatud peamiselt second-hand materjalist ja Tallinna Taaskasutuskeskuse tekstiilikojast ning selle meistri Pille Kelleri tegemistest

Mihkel Kangur / Tiiu Koff

Index Scriptorium Estoniae

Koff, Tiiu, 1955-

2005-01-01

14. juunil 2005. a. kaitses Mihkel Kangur Tallinna Ülikoolis väitekirja teemal "Häiringute ja taimkatte mosaiiksuse kajastumine järvesetete õietolmu ja söeosakeste profiilidel" ("Disturbances and vegetation patchiness reflected in pollen and charcoal profiles from lacustrine sediments")

Jaanus Terasmaa / Tiiu Koff

Index Scriptorium Estoniae

Koff, Tiiu, 1955-

2005-01-01

14. juunil 2005. a. kaitses Jaanus Terasmaa Tallinna Ülikoolis väitekirja teemal "Seston fluxes and sedimentation dynamics in small Estonian lakes" ("Sestonivood ja settimise dünaamika Eesti väikejärvedes")

Maailma ristteedel / Tiiu Reimo

Index Scriptorium Estoniae

Reimo, Tiiu, 1953-

2010-01-01

Infoteaduse ja raamatukogunduse alastest õppeprogrammidest. Raamatuajalugu on kujunenud interdistsiplinaarseks uurimisvaldkonnaks, iseseisva teadusdistsipliinina õpetatakse seda üha enam ka Põhjamaades, Baltimaades on raamatu ja raamatukogude ajalugu olnud raamatukogunduse õpetamise lahutamatu osa

Small unilamellar vesicles as reagents: a chemically defined, quantitative assay for lectins

Energy Technology Data Exchange (ETDEWEB)

Rando, R.R.

1981-01-01

Samll unilamellar vesicles containing synthetic glycolipids can be prepared. These vesicles are aggregated by the appropriate lectin (Orr et al., 1979; Rando and Bangerter, 1979; Slama and Rando, 1980). It is shown here that extent of aggregation of these vesicles as measured by light scattering at 360 nm, is, under certain conditions, linear with amount of lectin added. This forms the basis of a rapid and simple quantitative assay for lectins using the modified vesicles as a defined chemical substrate. The assay is sensitive to lectin concentrations in the low ..mu..g range. The assay is applied here to studies on concanavalin A, Ricinus communis agglutinin and the ..cap alpha..-fucosyl binding lectin from Ulex europaeus (Type I).

Näitused / Mari Sobolev

Index Scriptorium Estoniae

Sobolev, Mari, 1968-

1998-01-01

Kunstihoone ja Rotermanni soolaladu: "Kujundid, objektid, stseenid - vaatenurki prantsuse kunstile alates 1978. aastast"; Sammas-galerii: Tiiu Rebane ja Karl Nagel "Tänapäeva müüt"; Raatuse galerii: Elo Järv "Saavad uuteks liblikateks" (nahakunst); Tammsaare muuseum: "Mis jääb mällu" (sissevaade Saksamaa ajalukku ajavahemikul 1933-1949); Hotell "Olümpia" Forte saal: Gabor Dienesi personaalnäitus (maalid)

Torupillitalu vägevad isad ja lapsed / Kristel Kirss

Index Scriptorium Estoniae

Kirss, Kristel, 1967-

2008-01-01

Rahvapillimängija ja pillimeistri Ants Tauli ja Tiiu Tauli Torupilli talust Valgamaal. Saunast, elamust, puhkemajast ja välikäimlast, mille on ehitanud Ants Taul. Hoovi ehib Erna Viitoli skulptuur torupillimängijast. Külalistemaja tugipalkidele nikerdas näod kunstiõpetaja Valev Elerand. Anu ja Triinu Taul isa Ants Taulist, vanaisa Johannes Taulist, oma lapsepõlvest. 9 värv. vaadet

Generation of suprathermal electrons during plasma current startup by lower hybrid waves in a tokamak

International Nuclear Information System (INIS)

Ohkubo, K.; Toi, K.; Kawahata, K.

1984-10-01

Suprathermal electrons which carry a seed current are generated by non-resonant parametric decay instability during initial phase of lower hybrid current startup in the JIPP T-IIU tokamak. From the numerical analysis, it is found that parametrically excited lower hybrid waves at lower side band can bridge the spectral gap between the thermal velocity and the low velocity end in the pump power spectrum. (author)

Kaliningradi biennaal / Sandra Jõgeva

Index Scriptorium Estoniae

Jõgeva, Sandra, 1976-

2008-01-01

IX rahvusvaheline graafikabiennaal "Kaliningrad-Königsberg 2008" Kaliningradi kunstigaleriis 15. IX-15. XI. Eesti väljapanek (kuraator Eha Komissarov, kujundaja Marko Nautras, osalejad: Jaanika Okk, Kaarel Kütas, Lauri Koppel, Gerda Märtens, Raul Meel, Lembe Ruben, HULA, Villem Jahu, Tiiu Pirsko, Mati Veermets, Sandra Jõgeva) sai ekspositsioonipreemia. Grand prix - Paulis Liepa, I preemia - Olrik Kohlhoff, II - Dominica Sadowska, III - Raffael Rheinsberg, eripreemia - Markus Lampinen

Krakówi graafikasügis / Anne Untera

Index Scriptorium Estoniae

Untera, Anne, 1951-

2009-01-01

16. septembril avatud Krakówi rahvusvahelisest graafikatriennaalist. Grand prix läks poola graafikule Joanna Piechile. Läti graafik Guntars Sietiņš pälvis Varssavi kunstiakadeemia rektori auhinna. Eestit esindavad peanäitusel Ülle Marks, Benjamin Vasserman ja Eve Kask, satelliitnäitusel "PrintArt" Katowices Tiiu Prisko ja Mati Veermets ning kutsutud osalejatega satelliitnäitusel Torunis Evi Tihemets

Milleks monumenti = Why a monument? / Heie Treier

Index Scriptorium Estoniae

Treier, Heie, 1963-

2006-01-01

2006. a. toimunud Jüri Lotmani mälestusmärgi konkursist, Mati Karmini ja Andres Lunge võidutööst. Monumentide positiivseid näiteid: Tubina plats Tartus (Aili Vahtrapuu, Veronika Valk, Louis Dandrel), ideekavandid: Estonia teatri juubelimonument Tallinnas (Tiiu Kirsipuu, Üla Koppel) ja Eesti iseseisvuse monument Pärnus Rüütli platsil (Mart Aas, Kaarel Eelma, Mikk Mutso). Bibl. lk. 73

Žürii kommenteerib Kultuurkapitali arhitektuuripreemiaid 2008 / Marika Lõoke, Laila Põdra, Liina Jänes... [jt.

Index Scriptorium Estoniae

2009-01-01

Peapreemia: Markus Kaasik, Andres Ojari, Ilmar Valdur, Mihkel Tüür, Kalle Komissarov (Pärnu Keskraamatukogu hoone), tegevuspreemia: Maarja Kask, Ralf Lõoke, Neeme Külm, Ingrid Ruudi (projekt Gaasitoru 11. Veneetsia arhitektuuribiennaalil), aastapreemia: Maarja Kask, Ralf Lõoke, Karli Luik (Tartu Kesklinna Kooli juurdeehitus) ja Peep Jänes (Raudna Põhikooli spordihoone), sisearhitektuuri preemia: Tea Tammelaan, Malle Jürgenson, Krista Lepland, restaureerimispreemia: Mari Hammer, Tiiu Lõhmus, Helve Ilves, Villu Kadakas (Vanalinna Hariduskolleegiumi hoone)

Akustika! Akustika! Akustika! / Tiiu Levald

Index Scriptorium Estoniae

Levald, Tiiu, 1940-

2009-01-01

Kahest kontserdist: 1. oktoobril rahvusooperis Estonia toimunud pidulikust galaõhtust, mis oli pühendatud Miliza Korjusele. 2. oktoobril Estonia kontserdisaalis Berliozi "Fausti needmine" ERSO, segakoor Latvia ja solistide ettekandes, dirigent Olari Elts

Hea haridus alternatiivkoolist? / Tiiu Kuurme

Index Scriptorium Estoniae

Kuurme, Tiiu, 1953-

2000-01-01

Alternatiivkoolidest ja peamistest suundadest alternatiivpedagoogikas : avatud õpetus, Montessori-pedagoogika, Waldorf- ehk Steiner-pedagoogika, Freinet̀pedagoogika, vabad alternatiivkoolid, Jena-Plaan-pedagoogika, Landschulheim-tüüpi internaatkoolid, kool kui linn

Mõttekilde fantaasialennust suvelavadel / Tiiu Levald

Index Scriptorium Estoniae

Levald, Tiiu, 1940-

2010-01-01

Birgitta festivalil etendunud Glucki ooperist "Orpheus ja Eurydike", lavastaja Georg Rootering, R. Wagneri ooperist "Lohengrin", lavastaja Kaspar Holten ja G. Rossini ooperist "Sevilla habemeajaja", lavastaja Eliah Moshinsky

Kevadel Alaska talves / Tiiu Ehrenpreis

Index Scriptorium Estoniae

Ehrenpreis, Tiiu

2007-01-01

Autori muljeid 22.-25. märtsini Fairbanksis toimunud Alaska Ülikooli ja Ülemaailmse Arktika Uurimise Keskuse (IARC) juhtimisel GLOBE'i programmi uue projekti "Aastaajad ja bioomid" koolitusseminarist

Kultuuriministeerium jättis parima harrastusteatri toetuseta / Rando Tooming

Index Scriptorium Estoniae

Tooming, Rando

2003-01-01

Kultuuriministeerium loobus toetamast harrastusteatri sõitu Ülemaailmsele amatöörteatrite festivalile Kanadas. Tegemist on Eestit Harrastusteatrite Liidu, Teoteatri, Tallinna Toomklubi ja Botaanikaaia ühisprojektiga - A. Alegria "Niagaara" (lavastaja Jaan Urvet), mille rahvusvaheline žürii valis 300 hulgast 14 parima hulka

Physical and technical quality assurance in the CHARTWEL-bronchus trial

International Nuclear Information System (INIS)

Lehmann, D.; Voigtmann, L.; Herrmann, T.; Baumann, M.; Leetz, H.K.; Hodapp, N.

2003-01-01

Background: On-site physical quality assurance (QA) was performed in the participating centers of the CHARTWEL-Bronchus trial to ensure that physical and technical treatment parameters correspond with the requirements of this trial. Material and Methods: Questionnaires were sent to the clinics to obtain information on the equipment and in-house QA policies. In addition, two phantoms with drillings for an ionization chamber were shipped with detailed instructions for CT-based treatment planning of a fixed field (RW3 phantom) and a standardized isocentric 3-field technique (Rando trademark humanoid phantom). Using their routine treatment planning system, the participating centers performed point dose calculations for the isocenters in both phantoms and for defined points in the lungs and the spinal cord of the Rando trademark phantom. During the on-site visit, the doses in these points and the deviation of the actual monitor calibration from the internal reference value of the department were determined. In addition, relevant geometric parameters of the accelerator were checked. Results: In the RW3 phantom, the maximum dose deviations from the prescribed value were 3.5% without correction for the actual monitor calibration and 2.1% after correction. The maximum dose deviation in the isocenter of the Rando trademark phantom was 4.0%. To separate the influence of the treatment planning system on this deviation from other sources, all measurements in the Rando trademark phantom were corrected for the deviations determined in the RW3 phantom. After this correction, the maximum deviation was 3.0% in the isocenter. For the other measurement points, the largest dose deviation of 7% was found in the left lung. Deviations of geometric parameters were negligible in all audited departments. Conclusion: The CHARTWEL-Bronchus physical QA program revealed a high conformity of geometric and dosimetric parameters and valid dose calculations by the CT-based treatment planning systems

Kas elu maal läheb paremaks? / interv. Sirje Niitra

Index Scriptorium Estoniae

2007-01-01

Uue valitsuse koalitsioonileppe maainimest enim puudutavaid peatükke kommenteerivad: EMÜ majandus- ja sotsiaalinstituudi direktor Rando Värnik, sotsioloog Ülo Vooglaid, TÜ Pärnu kolledzhi direktor Garri Raagmaa, ärimees Urmas Sõõrumaa

Tallinna Lennujaama kauba- ja tolliterminaal. Lennujaama 2, Tallinn / Andres Põime

Index Scriptorium Estoniae

Põime, Andres

1998-01-01

Kaubateeninduskeskuse puhul on tegemist suure, plaanimõõtudes 36x102 meetrise metallkonstruktsioonis, sandwich tüüpi paneelidega kaetud laohoonega, kus ühelt poolt tuuakse tollitav kaup lennukitelt sisse ja teiselt poolt viiakse tollitud kaup välja. Peatöövõtja : Normanni Linnagrupi AS. Ehitaja : Merko. Peaprojekteerija : K-Projekt. Arhitektuurne lahendus : Stuudio 3. Arhitekt Andres Põime ; töögrupp Vivian Oruvee, Tiiu Raudsepp, Reet Põime. Projekt 1997-98, valmis 1998.

Klassikalise arhitektuuriga Pekingisse / Urmas Oja

Index Scriptorium Estoniae

Oja, Urmas, 1981-2012

2008-01-01

Pekingi Eesti saatkonnahoone arhitektuurikonkursist. I koht - "Tetris" autorid Andres Põime, Lauri Vaimel, Liisa Põime; II - "Maadligi, vettligi maja", autorid Erik Nobel, Christian Jensen, Kristen Herup Sovang, Soren Andersson, Pille Kivihall, Dan Ljungar, Hans Willadsen - arhitektuuribüroost NOBEL arkitekter; III - "Ai sha ni ya", autorid Kalle Vellevoog, Velle Kadalipp, Tiiu Truus, Martin Prommik arhitektuuribüroost JVR. Konkursitöödest on Eesti Ahitektuurimuuseumis avatud näitus. Küsimustele vastab arhitekt Andres Põime

ALGORITHM VERIFICATION FOR A TLD PERSONAL DOSIMETRY SYSTEM

International Nuclear Information System (INIS)

SHAHEIN, A.; SOLIMAN, H.A.; MAGHRABY, A.

2008-01-01

Dose algorithms are used in thermoluminescence personnel dosimetry for the interpretation of the dosimeter response in terms of equivalent dose. In the present study, an automated Harshaw 6600 reader was vigorously tested prior to the use for dose calculation algorithm according to the standard established by the US Department of Energy Laboratory Accreditation Program (DOELAP). Also, manual Harshaw 4500 reader was used along with the ICRU slab phantom and the RANDO phantom in experimentally determining the photon personal doses in terms of deep dose; Hp(10), shallow dose; Hp(0.07), and eye lens dose; Hp(3). Also, a Monte Carlo simulation program (VMC-dc) free code was used to simulate RANDO phantom irradiation process. The accuracy of the automated system lies well within DOELAP tolerance limits in all test categories

Kunst, pangad, raha!

Index Scriptorium Estoniae

2006-01-01

Flo Kasearu ja Alide Zvorovski kunstiprojektist "Majad, näidake oma sisu!". 7. IX sai Hansapanga fassaadil Liivalaia t. näha Ene-Liis Semperi ja Marko Mäetamme portreid, 8.-9. IX saab Eesti Panga fassaadil Estonia pst. näha Lydia Koidula ja Carl Robert Jakobsoni portreid. Panga ja kunasti/kultuuri suhetest, kunsti toetamisest, panga ootustest kunstilt. Arvamust avaldavad Eesti Panga avalike suhete büroo juhataja Janno Toots ja Hansapanga turundusdirektor Tiiu Tälli

Assessment of labour market returns in the case of gender unique human capital

OpenAIRE

Paas, Tiiu; Tverdostup, Maryna

2016-01-01

Maryna Tverdostup, Tiiu Paas, ERSA 2016: The paper focuses on the identification of the unique, non-reached by the opposite gender human capital and the analysis of its effect on the earning profiles of unique human capital holders. The overwhelming research aim is to better understand the possible reasons behind gender wage disparities, focusing on the unique features of male and female human capital and their returns. When assessing the gender pay disparities, variation of human capital cha...

Tony Blair ei saanud Balti riikidelt loodetud järeleandmisi / Andris Feldmanis

Index Scriptorium Estoniae

Feldmanis, Andris, 1982-

2005-01-01

Balti riigid ei olnud nõus loobuma kümnendikust eurotoetustest. Tallinnas viibinud Suurbritannia peaministri Tony Blairi väitel on EL-i uue finantsperspektiivi vastuvõtmine just uute liikmesriikide huvides. Vt. samas: Tiiu Laks. Riigijuhi visiit põhjustas Tallinnas vaid lühiajalisi liiklusseisakuid; Lisa: Blairi esinemine ei reetnud ebaedu; Kaivo Kopli. Uusliikmed andsid tuld juba enne ettepanekute saamist; Lisa: Toetus vanadelt liikmesmaadelt; Märt Kivine. EL-i eelarve: lahjem kui kunagi varem. Kommenteerib Taavi Veskimägi

Üleujutus arendaja hingel / Maris Kuuda

Index Scriptorium Estoniae

Kuuda, Maris

2007-01-01

Kohalikel omavalitsustel pole piisavalt hoobasid sundida arendajaid üleujutusohuga arvestama. Pärnusse hotelli September rajajad (arhitektid Emil Urbel, Andrus Mark) arvestavad ujutusohuga. Arvamust avaldavad Rene Reisner, Mari Sepp, Ülo Sults, Karri Tiigisoon, Indrek Rannik, Mark Soosaar, Tiiu Pärn, Merle Looring, Rita Sepp, Kaspar Alles. Keskkonnaministeeriumi plaanist muuta veeseadust, mis sunniks ehitajaid ja arendajaid arvestama üleujutusohuga. Lisadena olulise üleujutusohuga alad Eestis ning üleujutuste ohjamist käsitleva Euroopa Liidu direktiivi eelnõust

Effective dose evaluation for workers assisting new-borns in nuclear medicine procedures

International Nuclear Information System (INIS)

Falivene, A.; Gori, C.; Mazzocchi, S.; Targetti, S.; Zatelli, G.

2002-01-01

Renal scintigraphy is a very frequent nuclear medicine procedure for new-borns when deemed necessary after prenatal ultrasounds investigation. The procedure requires the physical proximity of workers to the patient, particularly during the examination of new-borns, in order to keep the young patients still. The irradiation of nurses during kidney examination of new-borns has been measured by simulating the examination procedure with an Alderson Rando phantom stuffed with thermoluminescent detectors, positioned near a radioactive source obtained with a tank filled with a 9 9mT c solution. Measurements have been carried out both with and without radiation protection devices positioned on the Rando phantom. Different organ doses have been evaluated. The aim of this analysis is to evaluate the amount of dose reduction that can be achieved by utilising lead aprons, glasses and thyroid collars

"Vanade ja kobedate" Väino uuendas tutvust maaga / Gert Kiiler

Index Scriptorium Estoniae

Kiiler, Gert

2002-01-01

RUUT Pictures alustas täispika rahvakomöödia "Vanad ja kobedad saavad jalad alla" või "Seiklusjutte maalt" võtteid Viljandimaal Mustlas, peaosades Henrik Normann ja Madis Milling. Režissöör on Rando Pettai

Improviseeritud lugu ja zhanriga mäng / Donald Tomberg

Index Scriptorium Estoniae

Tomberg, Donald

2003-01-01

Eesti komöödiafilm "Vanad ja kobedad saavad jalad alla" : režissöör Rando Pettai : operaator Mait Mäekivi : näitlejad Henrik Normann, Madis Milling, Robert Gutman jt. : muusika - ansambel Genialistid : Ruut Pictures 2003

Keskmiselt kobe vaatamine / Küllike Rooväli

Index Scriptorium Estoniae

Rooväli, Küllike, 1969-

2004-01-01

Eesti komöödiafilm "Vanad ja kobedad saavad jalad alla" : režissöör Rando Pettai : operaator Mait Mäekivi : näitlejad Henrik Normann, Madis Milling, Robert Gutman jt. : muusika - ansambel Genialistid : Ruut Pictures 2003

Case report

African Journals Online (AJOL)

abp

2015-09-08

Sep 8, 2015 ... dosage of the plasma free metanephrines. The dosage of ... Buonuomo V, Ruggiero A, Rando G, D'urzo C, Manzoni C,. Pintus C. Malignant ... Pavai Z, Orosz Z, Horvath E, Seres-Sturnl L, Jung J. Immunohistochimical features ...

Eesti läheb Pekingisse / Karin Hallas-Murula

Index Scriptorium Estoniae

Hallas-Murula, Karin, 1957-

2008-01-01

Pekingi Eesti saatkonnahoone konkursist žüriiliikme pilguga. Premeeritud ja esiletõstetud töödest. Võidutöö autorid - Lauri Vaimel, Andres Põime, Liisa Põime; II koht - Erik Nobel ja Nobel Arkitekten, Taani-Eesti; III koht - Kalle Vellevoog, Velle Kadalipp, Tiiu Truus, Martin Prommik; ostudega esiletõstetud tööde autorid - Priit Pent ja Raul Järg Bucoma OÜ-st ning Jan Skolimowski, Peeter Loo, Kaspar Kruuse ja Li Vene KAMP Arhitektide OÜ-st. Hiina ja Pekingi uusehitistest, arhitektidest

Vanalinna Hariduskolleegiumi gümnaasium = Collegium Educationis Revaliae gymnasium

Index Scriptorium Estoniae

2008-01-01

Vanalinna Hariduskolleegiumi gümnaasiumi hoone (Vene 22, Tallinn) restaureerimisest ja sisekujundusest. Arhitekt: Marie Hammer. Sisearhitekt: Tiiu Lõhmus. Hoone sisustamisel ja kujundamisel on püütud säilitada võimalikult palju ajaloolist üldilmet. Osa sisustusest ja valgustitest on valmistatud eritellimusena T. Lõhmuse kavandite järgi. .T. Lõhmusest, tema tähtsamad tööd. Keldri, I-III korruse ja pööningu plaan, värv. välisvaade, 10 sisevaadet, foto T. Lõhmusest

Üleminekuga kaduma või üle läinud? / Andri Ksenofontov

Index Scriptorium Estoniae

Ksenofontov, Andri, 1962-

2011-01-01

Näitus "Lost in Transition" Eesti Kaasaegse Kunsti Muuseumis 28. aug.-ni 2011, kuraator Rael Artel. Gergely László ja Katarina Ševići, Katarina Zdjelari, Flo Kasearu, Wojtek Doroszuki, Ivan Jurica, Anna-Stina Treumundi, Arnis Balčuse, Aleksei Gordini, Zampa di Leone töödest. Liisa Kruusmäe näitus "Pealtkuulatud lood" 11.-23. juulini ning Karl-Kristjan Nageli ja Tiiu Rebase näitus "Kohtucase - Epic Winning" Draakoni Galeriis 25.07.-6.08.2011

E-kursuste konkursi tulemused / Reelyka Läheb

Index Scriptorium Estoniae

Läheb, Reelyka

2004-01-01

01.09.-31.10. 2003 toimus Tallinna Pedagoogikaülikoolis konkurss "Eesti e-Ülikooli toetus e-õppe kursustele, sügis 2003" eesmärgiga töötada välja uusi veebipõhiseid kursuseid. Konkursile laekunud 10 tööst otsustati ellu rakendada kõik. Projekti täitmiseks määrati toetused Hindrek Lootusele, Leif Kalevile, Anu Tootsile, Raivo Vetikule, Tiiu Reimole, Ivar Pornile, Sirje Pihtile, Kai Randrüütile ja Reelyka Lähebile

Eesti aidsiennetus saab 52 miljonit välisraha / Rando Tooming

Index Scriptorium Estoniae

Tooming, Rando

2003-01-01

Rahvusvaheline finantsorganisatsioon Global Fund (Global Fund to Fight AIDS, Tuberculosis and Malaria) annab Eestile 2 aasta jooksul aidsiennetustööks 52 miljonit krooni. Kommenteerib Nelli Kalikova

Matrix - kultusfilm, mis muutus müüdiks / Rando Tooming

Index Scriptorium Estoniae

Tooming, Rando

2003-01-01

Andy ja Larry Wachowski ulmefilmide triloogia 3. osa "Matrix : Revolutsioon" ("The Marix Revolutions") jõuab 5. novembril esilinastuseni korraga enam kui 50 riigis, sealhulgas MPDE vahendusel ka Eestis. Eesti filmikriitikute arvamusi Matrix'i fenomenist

Investigation of the Entrance Surface Dose and Dose to Different Organs in Lumbar Spine Imaging

Science.gov (United States)

Sina, S; Zeinali, B; Karimipoorfard, M; Lotfalizadeh, F; Sadeghi, M; Zamani, E; Faghihi, R

2014-01-01

Background: Dose assessment using proper dosimeters is especially important in radiation protection optimization and imaging justification in diagnostic radiology. Objective: The aim of this study is to obtain the Entrance Skin Dose (ESD) of patients undergoing lumbar spine imaging using two thermoluminescence dosimeters TLD-100 (LiF: Mg, Ti) and GR-200 (LiF: Mg, Cu, P) and also to obtain the absorbed dose to different organs in lumbar spine imaging with several views. Methods: To measure the ESD values of the patients undergoing lumbar spine imaging, the two TLD types were put on their skin surface. The ESD values for different views of lumbar spine imaging were also measured by putting the TLDs at the surface of the Rando phantom. Several TLD chips were inserted inside different organs of Rando phantom to measure the absorbed dose to different organs in lumbar spine imaging. Results: The results indicate that there is a close agreement between the results of the two dosimeters. Based on the results of this experiment, the ESD dose of the 16 patients included in this study varied between 2.71 mGy and 26.29 mGy with the average of 11.89 mGy for TLD-100, and between 2.55 mGy and 27.41 mGy with the average of 12.32 mGy for GR-200 measurements. The ESDs obtained by putting the two types of TLDs at the surface of Rando phantom are in close agreement. Conclusion: According to the results, the GR200 has greater sensitivity than the TLD-100. PMID:25599058

Investigation of the Entrance Surface Dose and Dose to Different Organs in Lumbar Spine Imaging

Directory of Open Access Journals (Sweden)

Sina S

2014-12-01

Full Text Available Background: Dose assessment using proper dosimeters is especially important in radiation protection optimization and imaging justification in diagnostic radiology. Objective: The aim of this study is to obtain the Entrance Skin Dose (ESD of patients undergoing lumbar spine imaging using two thermoluminescence dosimeters TLD-100 (LiF: Mg, Ti and GR-200 (LiF: Mg, Cu, P and also to obtain the absorbed dose to different organs in lumbar spine imaging with several views. Methods: To measure the ESD values of the patients undergoing lumbar spine imaging, the two TLD types were put on their skin surface. The ESD values for different views of lumbar spine imaging were also measured by putting the TLDs at the surface of the Rando phantom. Several TLD chips were inserted inside different organs of Rando phantom to measure the absorbed dose to different organs in lumbar spine imaging. Results: The results indicate that there is a close agreement between the results of the two dosimeters. Based on the results of this experiment, the ESD dose of the 16 patients included in this study varied between 2.71 mGy and 26.29 mGy with the average of 11.89 mGy for TLD-100, and between 2.55 mGy and 27.41 mGy with the average of 12.32 mGy for GR-200 measurements. The ESDs obtained by putting the two types of TLDs at the surface of Rando phantom are in close agreement. Conclusion: According to the results, the GR200 has greater sensitivity than the TLD-100.

Determination of gonad doses during robotic stereotactic radiosurgery for various tumor sites

International Nuclear Information System (INIS)

Zorlu, Faruk; Dugel, Gozde; Ozyigit, Gokhan; Hurmuz, Pervin; Cengiz, Mustafa; Yildiz, Ferah; Akyol, Fadil; Gurkaynak, Murat

2013-01-01

Purpose: The authors evaluated the absorbed dose received by the gonads during robotic stereotactic radiosurgery (SRS) for the treatment of different tumor localizations. Methods: The authors measured the gonad doses during the treatment of head and neck, thoracic, abdominal, or pelvic tumors in both RANDO phantom and actual patients. The computerized tomography images were transferred to the treatment planning system. The contours of tumor and critical organs were delineated on each slice, and treatment plans were generated. Measurements for gonad doses were taken from the geometric projection of the ovary onto the skin for female patients, and from the scrotal skin for male patients by attaching films and Thermoluminescent dosimeters (TLDs). SRS was delivered with CyberKnife (Accuray Inc., Sunnyvale, CA). Results: The median gonadal doses with TLD and film dosimeter in actual patients were 0.19 Gy (range, 0.035–2.71 Gy) and 0.34 Gy (range, 0.066–3.18 Gy), respectively. In the RANDO phantom, the median ovarian doses with TLD and film dosimeter were 0.08 Gy (range, 0.03–0.159 Gy) and 0.05 Gy (range, 0.015–0.13 Gy), respectively. In the RANDO phantom, the median testicular doses with TLD and film dosimeter were 0.134 Gy (range 0.056–1.97 Gy) and 0.306 Gy (range, 0.065–2.25 Gy). Conclusions: Gonad doses are below sterility threshold in robotic SRS for different tumor localizations. However, particular attention should be given to gonads during robotic SRS for pelvic tumors.

Determination of gonad doses during robotic stereotactic radiosurgery for various tumor sites

Energy Technology Data Exchange (ETDEWEB)

Zorlu, Faruk; Dugel, Gozde; Ozyigit, Gokhan; Hurmuz, Pervin; Cengiz, Mustafa; Yildiz, Ferah; Akyol, Fadil; Gurkaynak, Murat [Hacettepe University Faculty of Medicine, Department of Radiation Oncology, Ankara 06100 (Turkey)

2013-04-15

Purpose: The authors evaluated the absorbed dose received by the gonads during robotic stereotactic radiosurgery (SRS) for the treatment of different tumor localizations. Methods: The authors measured the gonad doses during the treatment of head and neck, thoracic, abdominal, or pelvic tumors in both RANDO phantom and actual patients. The computerized tomography images were transferred to the treatment planning system. The contours of tumor and critical organs were delineated on each slice, and treatment plans were generated. Measurements for gonad doses were taken from the geometric projection of the ovary onto the skin for female patients, and from the scrotal skin for male patients by attaching films and Thermoluminescent dosimeters (TLDs). SRS was delivered with CyberKnife (Accuray Inc., Sunnyvale, CA). Results: The median gonadal doses with TLD and film dosimeter in actual patients were 0.19 Gy (range, 0.035-2.71 Gy) and 0.34 Gy (range, 0.066-3.18 Gy), respectively. In the RANDO phantom, the median ovarian doses with TLD and film dosimeter were 0.08 Gy (range, 0.03-0.159 Gy) and 0.05 Gy (range, 0.015-0.13 Gy), respectively. In the RANDO phantom, the median testicular doses with TLD and film dosimeter were 0.134 Gy (range 0.056-1.97 Gy) and 0.306 Gy (range, 0.065-2.25 Gy). Conclusions: Gonad doses are below sterility threshold in robotic SRS for different tumor localizations. However, particular attention should be given to gonads during robotic SRS for pelvic tumors.

Puksoo auhind 2007/2008 / Tiiu Reimo

Index Scriptorium Estoniae

Reimo, Tiiu, 1953-

2009-01-01

23. jaanuaril 2009 Tartu Ülikooli Raamatukogus peetud Friedrich Puksoo 119. sünniaastapäevale pühendatud ettekandepäeval "Raamatust, raamatukogust, raamatukoguhoidjast" kuulutati välja järjekordsed Puksoo auhinna laureaadid. TÜR-i ja ERÜ poolt välja antava auhinna pälvis TÜR-i teaduri, filosoofiadoktor Meelis Friedenthali dissertatsioon "Tallinna Linnaarhiivi Tractatus moralis de oculo", tõsteti esile Jürgen Beyeri ja Larissa Petina tööd

Tallinnas toimus 'Kunstisuve' esitlus / Tiiu Leis

Index Scriptorium Estoniae

Leis, Tiiu

1998-01-01

Pärnus, Kuressaares ja Haapsalus toimuva 'Kunstisuve' - Pärnu Linnagaleriis 'Midigrafik' (rahvusvaheline väikegraafika, koost. Sirje Eelmaa), Haapsalu Linnagaleriis 'Mix' (eesti maal, graafika, skulptuur, foto, installatsioon, koost. Agur Kruusing), Kuressaare Raegaleriis 'Nature' (traditsioonilisem eesti maal, graafika, skulptuur, koost. Rait Prääts), Kuressaare kultuurikeskuses 'Ilus lugu' (noorem ja mängulisem eesti kunst, koost. Karol Kallas) ئ esitlus toimus Tallinna heitveepuhastusjaama osoonimajas

Külalised ja meie / Tiiu Levald

Index Scriptorium Estoniae

Levald, Tiiu, 1940-

2009-01-01

11. detsembril Estonia kontserdisaalis toimunud ERSO kontserdist, dir. Olari Elts ja solist soome metsosopran Monica Groop, kavas oli Wagneri ja Mendelssohni looming ning 12. detsembril Estonias toimunud Donizetti ooperi "Poliuto" kontsertettekandest, dirigent Arvo Volmer

Evolutsioonilised kaalutlused ja filosoofia / Tiiu Hallap

Index Scriptorium Estoniae

Hallap, Tiiu

1999-01-01

Solipsistlikust ja mittesolipsistlikust reaktsioonist, bioloogilisest ja psühholoogilisest altruismist, evolutsiooniteooria sõltuvusest ühiskondlikest ideoloogiatest, Elliot Soberi evolutsioonilistest seletustest realistlikule maailmatunnetusele ja altruismile

Hooneregister on elav organism / Tiiu Põld

Index Scriptorium Estoniae

Põld, Tiiu, 1945-

1996-01-01

Riikliku hooneregistri talituse juhataja Ülo Eesmets hooneregistri ajaloost, ülesannetest ja dokumentidest, mida on vaja hoone registreerimiseks, lisana tabel hooneregistrite aadresside ja telefonidega

Haridustee = Education / Tiiu-Liisa Rummo-Laes

Index Scriptorium Estoniae

Rummo-Laes, Tiiu-Liisa

2006-01-01

Põhihariduses soolist eristumist ei ole märgata, murettekitavalt suur on poiste väljalangemine enne põhihariduse omandamist. Tütarlapsed ja noormehed üld- ja kutsehariduses, kesk- ja kõrghariduses. Noorte õppimine ja töötamine leibkonnatüübiti. Tabel, graafik, diagrammid

Ajakirjanike blogid ilmusid raamatutes / Tiiu Laks

Index Scriptorium Estoniae

Laks, Tiiu, 1984-

2007-01-01

Petrone, Epp. Minu Ameerika : reportaaže ja pihtimusi 2003-2006. 1. osa. Tartu : Petrone Print, 2007 ; Petrone, Epp, Reintam, Dagmar. Õun ära süüa? : [SL Õhtulehe populaarne suvejutt koos epiloogide ja lisadega. Tallinn] : Pegasus, 2007 ; Reintam, Dagmar. daki.elab.siin. Tartu : Petrone Print, 2007

Hispaanias auhinnati Eesti jalatsikunstnikke / Tiiu Laks

Index Scriptorium Estoniae

Laks, Tiiu, 1984-

2006-01-01

Eesti Kunstiakadeemia nahakunsti magistrandid Maris Pill ja Karen Milistver esinesid edukalt võistlusel "Lapiz de Oro 2006". Maris Pill võitis jalatsiprototüüpide kategoorias tööga "Two Faces" Kuldpliiatsi ja Karen Milistver tööga "Showy shoes" teise auhinna

Kvaliteetharidus riskilastele / Tiiu Tammemäe

Index Scriptorium Estoniae

Tammemäe, Tiiu

2014-01-01

17.-21. märtsini toimub Eestis rahvusvaheline konverents "Quality Education for Children at Social Risk. Sharing best practices and starting a dialogue", mida aitab organiseerida ka Tallinna ülikool

"Suurel alternatsioonil" tehti inimkatseid / Tiiu Leis

Index Scriptorium Estoniae

Leis, Tiiu

1999-01-01

18. juunil alanud festivalil "Suur alternatsioon" esitati performance'eid, tehti spray-maalinguid, näidati videoprojektsioone, esinesid ansamblid Kurjam, Sahfan Sih ja Crying Harmony, jõe peal mägisi klavessiini Sorge ja Katrin Kosenkranius, luuletusi lugesid Veiko Märka ja Aapo Ilves; korraldaja Taje Tross

Maestro Roman Toi kodumaal / Tiiu Pikkur

Index Scriptorium Estoniae

Pikkur, Tiiu, 1947-

2007-01-01

Helilooja ja koorijuht Roman Toi osalemisest muuseumiõhtul "Kaunimad laulud pühendan Sul!" 21. mail Eesti Teatri- ja Muusikamuuseumis, helilooja 90. sünnipäevale pühendatud kontserdist 23. mail Tallinna Toomkirikus ja Roman Toi nimelisest kirikulaulude konkursist

Ooperimaailmast siit ja sealt / Tiiu Levald

Index Scriptorium Estoniae

Levald, Tiiu, 1940-

2016-01-01

Lavastustest „Reekviem… ja elu enne” ja „Jevgeni Onegin” (Brigitta festival), „Lendav Hollandlane” (RO Estonia), „Tsaari mõrsja” ja „Kahe pealinna duett” (Helikon-Ooper Estonias) ning „Madama Butterfly” (Läti RO)

Puuskulptuurid tagasi Pärnus / Tiiu Leis

Index Scriptorium Estoniae

Leis, Tiiu

1998-01-01

'Puu 98' raames Kõpu külas valminud 3 puuskulptuuri: Toomas Mitti (Tõstamaa kooli direktor) 'Ahel', Omar Tamme 'Pähklipureja' ja Pjotr Romanjuki 'Maailma neli vaadet' jõuavad Rocca al Marest tagasi Pärnusse, kus neid eksponeeritakse paar nädalat hotelli 'Victoria' ees ning antakse seejärel üle Pärnu maavalitsusele ja 'Puu 98' toetajatele

Hetkebuklett kunstist Pärnus / Tiiu Leis

Index Scriptorium Estoniae

Leis, Tiiu

1998-01-01

Nelja maalikunstniku ئ Kostabi, Navitrolla, Van der Blut, Kaljo Simson ئ näitusest Caplini keskuses; Jelgava kunstnike (Lolita Zikmane, Kalvis Zuters, Edvin Kalnieks, Ieva Vitola) näitusest Linnagaleriis; näitus "Musik in der Kunzt" teatri palmisaalis, kus Urmas Uustal (1963), Elin Kard, Kristiina Väljamäe interpreteerivad muusikat installatsioonide, maalide ja söejooniste kaudu

Linnateatri suveetenduse lavastab prantslane / Tiiu Talvist

Index Scriptorium Estoniae

Talvist, Tiiu

2002-01-01

Kuressaare Linnateatri suvelavastus "Arlekiini elu ja surm" on kokku pandud commedia dell' arte originaalstsenaariumide põhjal ja seda hakkab lavastama P. Pezin, kes on asjatundja commedia dell' arte ja maskiteatri alal

Kuninglikud lapsed keset Mallorcat / Tiiu Laks

Index Scriptorium Estoniae

Laks, Tiiu, 1984-

2007-01-01

Kunstnike Yannick (s. 1942) ja Ben (s. 1930) Jakoberi eramuuseumist Hispaanias. Lisaks 16.-19. saj. pärit lasteportreedele sisaldab muuseum moodsa kunsti töid, sealhulgas kunstnike endi tehtud skulptuure ning Domenico Gnolli teoseid. Kodumaja kujundajaks on egiptuse arhitekt Hassan Fathy

Olen tänulik / Tiiu Lember

Index Scriptorium Estoniae

Lember, Tiiu

2003-01-01

Artikli autor läbis Tartu Ülikooli avatud ülikooli täienduskoolituses programmi "Koolifüüsika ja loodusteaduslik mõtteviis". Loenguid pidasid Tartu Ülikooli õppejõud H. Voolaid - mehaanika ja optika, K. Tarkpea - elekter ja magnetism, aine ehitus, arutles füüsika ja looduse teemadel, ning J. Susi - molekulaarfüüsika teemad

Influence of a Saccharomyces cerevisia fermentation product on the pathophysiological response to a combined intranasal bovine herpesvirus-1 and intratracheal Mannheimia haemolytica challenge in Holstein steers

Science.gov (United States)

The objective of this study was to determine the effects of supplementing a Saccharomyces cerevisiae fermentation product prototype (Prototype) on the pathophysiological response during a combined viral-bacterial respiratory challenge. Holstein steer calves (126.5±6.11kg; N=16) were completely rando...

Tomodensitometry images: integration in radiotherapy

Energy Technology Data Exchange (ETDEWEB)

Dessy, F; Hoornaert, M T [Jolimont Hospital, Haine Saint Paul (France). Cancer and Nuclear Medicine Dept.; Malchair, F [Biomed Engineering, Boncelles (France)

1995-12-01

With a view to utilization of CT scan images in radiotherapy, the effective energy and the linearity of four different scanners (Siemens somatom CR, HiQS, Plus and Picker PQ 2000) and two non standard scanners, simulators with CT option (Webb 1990) (Varian Ximatron and Oldelft Simulx CT) has been measured using the method described by White and Speller in 1980. When the linearity relation in presented using the density or the electron density as the abscissa, a blurred area where two different components of equal density or electron density can have two different Hounsfield`s numbers. Using the linearity relation, the density of Rando`s lung heterogeneity is determined. We calculated a treatment planning (TP) using this value and made a comparison between the TP and the real absorbed dose with was measured using diodes. The comparison between the TP and the relative Absorbed doses showed a difference of up to 4.5%.

Insertion of the structure of irregular geometries DICOM image-making into a cell for the simulation in MCNP

International Nuclear Information System (INIS)

Boia, Leonardo S.; Silva, Ademir X.

2009-01-01

It is possible nowadays to make changes in any digital image format due to the advancement of editing systems for images, with a little definition loss. Intending to increase the degrees of freedom on computer simulation fields, a process of integration of irregular geometries in the structure of medical DICOM images of the Anthropomorphic Rando Phantom making it so a cell is developed in this work and, therefore, the inclusion or change of the TLD's location in phantom for dosimetric studies, become a more dynamic simulation in MCNP. At first, creation and processing of the desired geometry are proceeded. It was coupled to the geometry in the study area of the DICOM image and the image's conversion into a MCNP input file was performed by software Scan2MCNP. Using the proposed computational process, a case of a clot and its ramifications was studied in Alderson Rando Phantom's left side brain area. (author)

Dose distribution and risk factors in tele cobalt therapy and intracavitary treatment with sealed sources of Cesium-137

International Nuclear Information System (INIS)

Briquet, C.

1984-01-01

The purpose of this work is to evaluate dose to organs, outside the treatment volume. The experimental measurements were done using TLD dosemeters, placed in various regions of a Rando Alderson Phantom. The theoretical absorbed doses were calculated using the Monte Carlo method applied to a mathematical phantom. (author)

Doktoritööd : [2000

Index Scriptorium Estoniae

2000-01-01

6. okt. 2000 TPÜ-s ökoloogia doktorikraadi kaitsmisnõukogu koosolekul tuleb kaitsmisele Tiiu Alliksaare doktoritöö "Spatial and temporal variability of the distribution of spherical fly-ash particles in sediments in Estonia". 15. dets. 2000 kaitsevad Mart Kivimäe TPÜ kultuuriajaloo doktoritööde kaitsmisnõukogu koosolekul doktoritööd "Dialoogiline historism. Ajaloomõtlemise kolm strateegiat ja nende dialoogisuhted minevikuga saksa teaduskultuuri näitel (R. Kosselleck, J. Rüsen, E. Nolte)" ja Hannes Walter doktoritööd "Eesti teenetemärgid"

Dr. Arthur Puksovi Fondi teadaanne / Ivar Nippak

Index Scriptorium Estoniae

Nippak, Ivar

2005-01-01

1975. aastal asutatud fondi eesmärgiks on innustada Eesti vanema ajaloo teaduslikku uurimist ja vastavate tööde kirjastamist. 2004. aastal tunnistati I auhinna vääriliseks Tiiu Reimo monograafia "Raamatukultuur Tallinnas 18. saj. teisel poolel" (2001); II auhinna sai Aivar Põldvee monograafia "Pakri rootslaste kaebused Karl XI-le 1684. aastal: muutuste aeg Harju-Madise ja Risti kihelkonnas" (2001) ja pikema artikli "Talurahvakoolid Eesti- ja Liivimaal 17. sajandi viimasel veerandil" (2002) eest. 2005. aastal fond auhindu ei andnud. Auhinnavõistlus 2006. aastaks on välja kuulutatud

Quick profile-reorganization driven by helical field perturbation for suppressing tokamak major disruptions

International Nuclear Information System (INIS)

Yamazaki, K.; Kawahata, K.; Ando, R.

1986-09-01

Disruptive behavior of magnetic field configuration leading to tokamak major disruption is found to be controlled by a mild ''mini-disruption'' which is induced by the compact external modular multipole-field coils with m = 3/n = 2 dominant helical field component in the JIPP T-IIU tokamak. This mini-disruption ergodizes the m = 2/n = 1 magnetic island quickly but mildly and then prevents the profile of electron temperature from flattening. This quick profile-reorganization is effective to avoid the two-step disruption (pre- and major disuptions) responsible for the chatastrophic current termination. (author)

Punanahklusest: Majakovskist indiaanlasteni / Vaapo Vaher

Index Scriptorium Estoniae

Vaher, Vaapo, 1945-

2011-01-01

Tutvustus: Jangfeldt, Bengt. Mäng elu peale : Vladimir Majakovski ja tema lähikond / tõlkinud Anu Saluäär. Tallinn : Varrak, 2011 ; Céline, Louis-Ferdinand. Reis öö lõppu / tõlkinud Heli Allik. Tallinn : Varrak, 2010 ; Simone, Claude. Flandria tee / tõlkinud Leena Tomasberg. Tallinn : Eesti Raamat, 2011 ; Härm, Tiiu. Jää voolab : Eesti polaarränduri August Masiku maailm. Tallinn : Eesti Raamat, 2010 ; Page, Jake. Suure vaimu rüpes : Ameerika indiaanlaste 20 000-aastane ajalugu / tõlkinud Matti Piirimaa. Tallinn : Tänapäev, 2011

Close contact dose: a radioiodine therapy case study

International Nuclear Information System (INIS)

Tuchyna, T.

2002-01-01

Full text: External radiation dose rates were measured immediately post administration and periodically thereafter at 0.3 and 1.0 m from a patient who received a 555 MBq therapeutic dose of I-131. The dose received by the partner during the close contact period of sleep was measured with an anthropomorphic RANDO phantom representing a standard man with ICRP60 organs critical for dosimetry. RANDO occupied the same bed as the patient at a skin to skin distance of 30 cm with up to 30 TLD rods (1 x 1 x 6mm, LiF:Mg) inserted at critical organ positions within the phantom. The measurements were compared with empirical estimates provided by the Close Contact Dose Spreadsheet (Cormack and Shearer, 1998). The measured external dose rate of 19.3microSv/hr obtained immediately post administration rose slightly, to 26.3microSv/hr during the first 12 hours, however subsequently demonstrated a slow decrease. The TLDs embed- ded in RANDO recorded a dose of 0.24mSv during the hours of sleep. The total dose received by the partner over the two days was 0.29mSv, which compared favourably with a figure of 0.31mSv obtained by the Close Contact Dose Spreadsheet. The doses received demonstrate the validity of restricting patient partner contact during the hours of sleep within the first few days post administration. Monitoring of the bedroom, bed linen, bathroom, toilet and personal effects showed slight levels of contamination ranging from background to 20 cps. Copyright (2002) The Australian and New Zealand Society of Nuclear Medicine Inc

Dental radiography: tooth enamel EPR dose assessment from Rando phantom measurements

International Nuclear Information System (INIS)

Aragno, D.; Fattibene, P.; Onori, S.

2000-01-01

Electron paramagnetic resonance dosimetry of tooth enamel is now established as a suitable method for individual dose reconstruction following radiation accidents. The accuracy of the method is limited by some confounding factors, among which is the dose received due to medical x-ray irradiation. In the present paper the EPR response of tooth enamel to endoral examination was experimentally evaluated using an anthropomorphic phantom. The dose to enamel for a single exposure of a typical dental examination performed with a new x-ray generation unit working at 65 kVp gave rise to a CO 2 -signal of intensity similar to that induced by a dose of about 2 mGy of 60 Co. EPR measurements were performed on the entire tooth with no attempt to separate buccal and lingual components. Also the dose to enamel for an orthopantomography exam was estimated. It was derived from TLD measurements as equivalent to 0.2 mGy of 60 Co. In view of application to risk assessment analysis, in the present work the value for the ratio of the reference dose at the phantom surface measured with TLD to the dose at the tooth measured with EPR was determined. (author)

Radiation protection in CT pelvis in Fantoma Rando by thermoluminescent dosimetry.

Science.gov (United States)

Madrid-González, O A; Rivera-Montalvo, T; Azorín-Nieto, J

2012-12-01

This paper presents results of equivalent dose organ determining to both primary beam and scattered radiation in a computed tomography (CT) procedures. All measurements were carried out to abdomen and critical organ (gonads) area. Selected dosimeters showed a standard deviation of 4.1% below to the reference values established by international guide lines. The equivalent dose in gonads was 14.27 mGy. Copyright © 2012. Published by Elsevier Ltd.

Evaluation of the reconstruction of image acquired from CT simulator to reduce metal artifact

International Nuclear Information System (INIS)

Choi, Ji Hun; Park, Jin Hong; Choi, Byung Don; Won, Hui Su; Chang, Nam Jun; Goo, Jang Hyun; Hong, Joo Wan

2014-01-01

This study presents the usefulness assessment of metal artifact reduction for orthopedic implants(O-MAR) to decrease metal artifacts from materials with high density when acquired CT images. By CT simulator, original CT images were acquired from Gammex and Rando phantom and those phantoms inserted with high density materials were scanned for other CT images with metal artifacts and then O-MAR was applied to those images, respectively. To evaluate CT images using Gammex phantom, 5 regions of interest(ROIs) were placed at 5 organs and 3 ROIs were set up at points affected by artifacts. The averages of standard deviation(SD) and CT numbers were compared with a plan using original image. For assessment of variations in dose of tissue around materials with high density, the volume of a cylindrical shape was designed at 3 places in images acquired from Rando phantom by Eclipse. With 6 MV, 7-fields, 15x15cm 2 and 100 cGy per fraction, treatment planning was created and the mean dose were compared with a plan using original image. In the test with the Gammex phantom, CT numbers had a few difference at established points and especially 3 points affected by artifacts had most of the same figures. In the case of O-MAR image, the more reduction in SD appeared at all of 8 points than non O-MAR image. In the test using the Rando Phantom, the variations in dose of tissue around high density materials had a few difference between original CT image and CT image with O-MAR. The CT images using O-MAR were acquired clearly at the boundary of tissue around high density materials and applying O-MAR was useful for correcting CT numbers

Nele Suisalu otsib aktiivset vaatajat / Tiiu Laks

Index Scriptorium Estoniae

Laks, Tiiu, 1984-

2008-01-01

Lõuna-Prantsusmaal Montpellier's koreograaf Xavier le Roi juures õppiv Nele Suisalu lavastab koos elukaaslase Florent Hamoniga Tallinnas Kanuti Gildi saalis Augusti tantsufestivali raames tantsuetenduse "Ball"

Plaadid / Kaur Garshnek, Maris Meiesaar, Tiiu Laks

Index Scriptorium Estoniae

Garšnek, Kaur, 1983-

2008-01-01

Uutest heliplaatidest Holst Singers ja Stephen Layton, Stephen "Rockferry", Queens Of Stone Age "Era Vulgaris Tour Edition", "Crystal Castles", Operator Please "Yes Yes Vindictive", Morcheeba "Dive Deep"

Raagi Hamleti-filmil topelt-esilinastus / Tiiu Talvist

Index Scriptorium Estoniae

Talvist, Tiiu

2000-01-01

29.oktoobril esilinastub Saaremaal kinos "Scala" ja Eesti Televisioonis Hamleti-teemaline ingliskeelne lühimängufilm "Miski on mäda ehk Kogu vale Hamletist" : režissöör, stsenarist ja produtsent Ilmar Raag : OÜ Kinomees 2000

Loomakasvatus, 2007 = Livestock farming, 2007 / Tiiu Tamm

Index Scriptorium Estoniae

Tamm, Tiiu

2007-01-01

2007. aastal tapeti ning müüdi tapaks 105 000 tonni loomi ja linde, toodeti 689 700 tonni piima ning 155,8 miljonit muna. Diagramm. Tabelid. Vt. samas: Loomade ja piima kokkuost, 2007 = Purchase of livestock and milk, 2007

Laboratooriumi tänavalt, armastusega / Tiiu Suvi

Index Scriptorium Estoniae

Suvi, Tiiu

2007-01-01

Laboratooriumi tänava Ukraina Kreeka-Katoliku kiriku Tallinna koguduse Kolmkäsi Jumalaema kirikust. Sisekujundajaks ning koguduse vanemaks on ERKI mööbli- ja sisekujundajana lõpetanud Anatoli Ljutjuk. Kiriku taastamisest, laupäevastest käsitöötundidest lastele, kloostrikunstide kooli Labora ja poegade Bogdani ja Nestori tegevusest

Euroopa Liidu lävel / Tiiu Sizova

Index Scriptorium Estoniae

Sizova, Tiiu

2003-01-01

Ilmunud ka: Severnoje Poberezhje : Okruzhajushtshaja Sreda 6. dets. lk. 1. Eesti keskkonnahoiu seisukohalt on Ida-Virumaa üks problemaatilisemaid piirkondi, ülesanded seoses rahvusvaheliste direktiivide täitmisega

Kolm võimalust, kolm kontrasti / Tiiu Levald

Index Scriptorium Estoniae

Levald, Tiiu, 1940-

2009-01-01

Saaremaa ooperipäevadel Soome Kammerooperi ja Läti Rahvusooperi poolt esitatud kolmest ooperist - Ilkka Kuusisto "Vabaduse vang - Ryti, Risto, nr 236/46", R. Wagneri "Lendav Hollandlane" ja C. Puccini "Turandot"

Plaadid / Veiko Pesur, Tiiu Laks, Mart Normet

Index Scriptorium Estoniae

Pesur, Veiko

2008-01-01

Uutest heliplaatidest Shower, Nice Try ja Jim Arrow & The Anachrones "Eesti Rock Antoloogia", Eskimo "Psst! pole sõnu sõnumiks tarvis", Tanel Padar & The Sun "Veidi valjem kui vaikus II", Liisi Koikson "Väikeste asjade võlu"

VAT teatril kaks uut noortelavastust / Tiiu Talvist

Index Scriptorium Estoniae

Talvist, Tiiu

2010-01-01

VAT teater panustab sel hooajal uutesse laste- ja noortelavastustesse: lisaks itaallaste Nino d’Introna ja Giacomo Ravicchio teksti põhjal valminud seiklusloole „Robinson & Crusoe” (lavastaja Aare Toikka), esietendub aprillis Mare Sabolotny noorte probleemidest kõnelev lavalugu „Kirjaklambritest vöö”. Lavastaja Rein Agur

Katk Põhjasõja ajal Eestis / Tiiu Oja

Index Scriptorium Estoniae

Oja, Tiiu

1996-01-01

Tabelid: Katku surnud ja ellujäänuteprotsent elanikkonnast kihelkondade järgi Eestimaal 1712. a. revisjoni alusel; Eestimaa mõisad, kus suremus oli väga kõrge; Saaremaal katku järel tühjaks jäänud mõisad; Ellujäänud tööjõuliste inimeste, vanade ja laste suhtarv 1712. a. revisjoni järgi; Katku surnute arv Liivimaal 1711-1712 a. loenduse andmeil

Tampere Teatrisuve maiuspalaks olid soomlased / Tiiu Laks

Index Scriptorium Estoniae

Laks, Tiiu, 1984-

2006-01-01

38. Tampere teatrisuvest (Tamperen teatterikesä), vaatluse all on soomlaste menutükid - Anna Krogeruse "Armastusest minu vastu" (lav. Irene Aho, Soome Rahvusteater) ja William Shakespeare'i "Richard III" (lav. Juha Luukkonen, Vaasa Linnateater)

Tantsuline vaade kodusele Eestimaale Aafrikast / Tiiu Laks

Index Scriptorium Estoniae

Laks, Tiiu, 1984-

2009-01-01

9. dets. esietendub Tallinna Meistrite Hoovi teatrisaalis Eike Ülevainu, Jaak Sapase ning Eneli Meresmaa lavastus "Estonia Meets Africa ehk Vaade eemalt", mis kannab tinglikult dokumentaallavastuse nime ja esitatakse nüüdistantsu ja -teatri vormis

Academia Non Grata korraldas piketi / Tiiu Leis

Index Scriptorium Estoniae

Leis, Tiiu

1998-01-01

Kunstikooli Academia Non Grata korraldatud piketist 'Jõuluvale' Pärnu linnavalitsuse ees nõudmaks linnavalitsuse antava rahasumma suurendamist. Kommentaarid rektor Reiu Tüürilt, aselinnapealt Peeter Oravalt, linnapea Vello Järvesalult.

Uue ajastu uus põlvkond / Tiiu Levald

Index Scriptorium Estoniae

Levald, Tiiu, 1940-

2008-01-01

Vaatluse alla on võetud viimase kümne aasta jooksul peale kasvanud noorte lauljate tegemised Estonias, Vanemuises, Nargen Operas ja erinevates projektides. Pikemal kahest lavastusest Estonias - Rossini "Tuhkatriinu" ja Tambergi "Cyrano de Bergerac". Artikli lõpus loetelu lauljatest ja nende rollidest erinevates teatrites ja projektides

Suur 'Alternatsioon 98' / Tiiu Leis, Al Paldrok

Index Scriptorium Estoniae

Leis, Tiiu

1998-01-01

Kaheosalise Pärnu kultuuriürituse 'Alternatsioon 98' tutvustus: 8.-9. mail kujutav-, video- ja tegevuskunst; 5.-6. juunil muusika, tants, sport, mood. 8. mai: punkansambli 'Kurjam' kontsert, avatakse näitused 'Alternatsioon 2' Soolalaos, Tallinnas keelatud 'Eesti Vabariik 80' ja Taave Tuutma 'Rikaste toetamise fond', performance'id Rüütli tänaval; 9. mai: seksuaalvähemuste ja teiste protestimarss.

Täiend(us)koolituse kitsaskohtadest / Tiiu Hazak

Index Scriptorium Estoniae

Hazak, Tiiu

2002-01-01

Ilmunud ka: ; Buhgalterskije Novosti nr. 4, lk. 10-12. Probleemidest täiendkoolituses - vastuolu haridusseaduse ja tulumaksuseaduse vahel ning täienduskoolituse muutumine kaubaks, mistõttu pakutavad õppekavad ei pruugi vastata inimeste tegelikele vajadustele

Mikk Mikiveri mälestuseks / Tiiu Pikkur

Index Scriptorium Estoniae

Pikkur, Tiiu, 1947-

2006-01-01

4. sept. esitleti Draamateatris Mikk Mikiveri mälestusele pühendatud plaati "In memoriam", kus ema Teresa, helilooja Kaljo Raidi ja piibliõpetaja ning jutlustaja Philipp-Teedy Tüüri mõtteid loeb Tõnu Mikiver. Plaadil kõlab muusika kitarrist Heiki Mätliku esituses. Plaadi tekstid valis kirjastusselts Logos

Ooperipäevad Saaremaal (II) / Tiiu Levald

Index Scriptorium Estoniae

Levald, Tiiu, 1940-

2008-01-01

21.-27. VII Saaremaa ooperipäevade raames toimunud üritustest - Carmen Tabori lavastatud Aino Kallase ja Tauno Pylkkäneni "Patseba Saaremaal" (esimene osa draama- ja teine ooperilavastus), Gershwini ooperist "Porgy ja Bess" ning 25. VII toimunud galakontserdist

Botaanikud Chamisso ja Eschscholtz Californias / Tiiu Speek

Index Scriptorium Estoniae

Speek, Tiiu, 1958-

2012-01-01

Loodusteadlaste A. von Chamisso ja J. Fr. Eschscholtzi osalemisest O. von Kotzebue ekspeditsioonidel (1815-1818 ning 1823-1826); reisidel kogutud ja kirjeldatud USA lääneosa ja California taimeliikidest ning neist koostatud herbaariumite saatusest

TÜ, TPÜ ja EHI uusi magistreid / Eda Tursk, Hille Roots, Heidi Meier

Index Scriptorium Estoniae

Tursk, Eda

2004-01-01

Tartu ülikooli eesti ja soome-ugri keeleteaduse osakonnas ning kirjanduse ja rahvaluule osakonnas kaitsesid 2003.a. magistritööd Niina Aasmäe, Piret Voll, Larissa Degel, Reet Hendrikson, Tiina Pai, Petar Kehayov, Anna Baidullina, Katrin Ennus, Kristi Jõesaar, Ell Vahtramäe, Lauri Sommer, Andreas Kalkun, Mirjam Hinrikus, Kristel Nõlvak. Tallinna Pedagoogikaülikoolis kaitsesid 2003.a. magistritööd Sirje Nootre, Merike Mägedi, Tiiu Koovit, Heidi Meier, Jaanika Stackhouse, Lilian Ossi, Annika Vamper, Marika Mikkor, Piret Õunapuu, Helin Puksand, Taimi Rosenberg. Eesti Humanitaarinstituudis kaitses 2003.a. magistritööd Merilin Miljan

Milliseid erialaseid teadmisi ja oskusi olete kasutanud oma praeguses ametis? : vastavad infoteaduse eriala vilistlased / interv. Hela Ojasaar, Margot Mahlapuu

Index Scriptorium Estoniae

2005-01-01

Vastavad: EV Presidendi Kantselei direktori asetäitja, üldosakonna juhataja Riina Roomet, Mahtra Talurahvamuuseumi direktor Tiia-Helle Schmitte, EBS-i raamatukogu juhataja Eda Pihu, Euroopa Liidu asjade komisjoni nõunik (Riigikogu) Külli Kask, Kultuuriministeeriumi raamatukogunõunik Meeli Veskus, Võrumaa Keskraamatukogu direktor Inga Kuljus, Lääne Maakonna Keskraamatukogu direktor Ilme Sepp, Riigiarhiivi direktor Marge Tiidus, kirjastuse Pilgrim juht Tiina Ristimets, Tallinna Keskraamatukogu direktor Kaie Holm, Eesti ENIC/NARIC Keskuse infospetsialist Liia Tüür, Eesti Rahvusraamatukogu direktor Tiiu Valm, Tartu Ülikooli Raamatukogu teenindusdirektor Mare-Nelli Ilus, Viljandi Kultuuriakadeemia raamatukogunduse ja infoteaduste osakonna juhataja Ilmar Vaaro

Interventional radiology simulation and measurement of patient doses; Simulacion en radiologia intervencionista y medida de dosis a pacientes

Energy Technology Data Exchange (ETDEWEB)

Herraiz Lablanca, M. d.; Diaz Romero, F.; Hernandez Armas, J.

2011-07-01

In this paper we propose a method of work to calculate the effective dose in any interventional radiology procedure using an Alderson Rando anthropomorphic phantom and dosimeters TLD 100 chip. We applied this method in the case of biliary drainage and allowed us to establish the dose value corresponding reference in the Hospital Universitario de Canarias (HUC).

Fetal dose determination in patients with breast cancer submitted to radiotherapy

International Nuclear Information System (INIS)

Melo, H.C.; Roesler, I.C.; Leon, E.

1985-01-01

The exposure that the fetus receive during radiotherapy treatment for patients with breast cancer submitted to cobalt 60 and linear accelerator of 6 MV is studied. Measurements with a rando-Alderson Phantom and ionization chamber for each individualized irradiation field, at the body level where the fetus is localized during the several stages of pregnancy, are made. (M.A.C.) [pt

Uus-Maailma uued kortermajad

Index Scriptorium Estoniae

2008-01-01

Korter endises büroohoones Luha 16 - rekonstrueerimisprojekt Tormi Sooväljalt, korter uues galeriimajas Koidu 60-62/ Komeedi 14 - arhitektid Rein Murula ja Karl Koosa (Rein Murula Arhitektuuribüroo OÜ) ja korter uues büroo- ja kortermajas Villardi 22 - Humana Grupp Arhitektuuri- ja Inseneribüroolt. Kommenteerivad arhitektid Peeter Tambu ja Eve Arpo ning kinnisvara maakler Rando Vanaveski

Validation of key behaviourally based mental health diagnoses in administrative data: suicide attempt, alcohol abuse, illicit drug abuse and tobacco use

OpenAIRE

Kim Hyungjin; Smith Eric G; Stano Claire M; Ganoczy Dara; Zivin Kara; Walters Heather; Valenstein Marcia

2012-01-01

Abstract Background Observational research frequently uses administrative codes for mental health or substance use diagnoses and for important behaviours such as suicide attempts. We sought to validate codes (International Classification of Diseases, 9th edition, clinical modification diagnostic and E-codes) entered in Veterans Health Administration administrative data for patients with depression versus a gold standard of electronic medical record text ("chart notation"). Methods Three rando...

Clinical dosimetry of large shaped 60Co irradiation fields

International Nuclear Information System (INIS)

Novotny, J.

1979-01-01

The determination is described of absorbed doses in the Alderson-Rando phantom by thermoluminescent dosemeters in patients irradiated with irregularly shaped large-surface fields of Co 60 . In a range of 3 to 5% the measured values correspond to the values calculated with the aid of relations presented by Bukowitz. Non-homogeneity of irradiation when two supradiaphragmatic fields are used and its improvement are discussed. (author)

SU-C-213-05: Evaluation of a Composite Copper-Plastic Material for a 3D Printed Radiation Therapy Bolus

International Nuclear Information System (INIS)

Vitzthum, L; Ehler, E; Sterling, D; Reynolds, T; Higgins, P; Dusenbery, K

2015-01-01

Purpose: To evaluate a novel 3D printed bolus fabricated from a copper-plastic composite as a thin flexible, custom fitting device that can replicate doses achieved with conventional bolus techniques. Methods: Two models of bolus were created on a 3D printer using a composite copper-PLA/PHA. Firstly, boluses were constructed at thicknesses of 0.4, 0.6 and 0.8 mm. Relative dose measurements were performed under the bolus with an Attix Chamber as well as with radiochromic film. Results were compared to superficial Attix Chamber measurements in a water equivalent material to determine the dosimetric water equivalence of the copper-PLA/PHA plastic. Secondly, CT images of a RANDO phantom were used to create a custom fitting bolus across the anterolateral scalp. Surface dose with the bolus placed on the RANDO phantom was measured with radiochromic film at tangential angles with 6, 10, 10 flattening filter free (FFF) and 18 MV photon beams. Results: Mean surface doses for 6, 10, 10FFF and 18 MV were measured as a percent of Dmax for the flat bolus devices of each thickness. The 0.4 mm thickness bolus was determined to be near equivalent to 2.5 mm depth in water for all four energies. Surface doses ranged from 59–63% without bolus and 85–90% with the custom 0.4 mm copper-plastic bolus relative to the prescribed dose for an oblique tangential beam arrangement on the RANDO phantom. Conclusion: Sub-millimeter thickness, 3D printed composite copper-PLA/PHA bolus can provide a build-up effect equivalent to conventional bolus. At this thickness, the 3D printed bolus allows a level of flexure that may provide more patient comfort than current 3D printing materials used in bolus fabrication while still retaining the CT based custom patient shape. Funding provided by an intra-department grant of the University of Minnesota Department of Radiation Oncology

Study on the photoneutrons produced in 15 MV medical linear accelerators : Comparison of three dimensional conformal radiotherapy and intensity modulated radiotherapy

Energy Technology Data Exchange (ETDEWEB)

Yang, Oh Nam [Gangneung Asan Hospital, Gangneung (Korea, Republic of); Yang, Oh Nam; Lim, Cheong Hwan [Hanseo Univ., Seosan (Korea, Republic of)

2012-12-15

Intensity-modulated radiotherapy(IMRT) have the ability to provide better dose conformity and sparing of critical normal tissues than three-dimensional radiotherapy(3DCRT). Especially, with the benefit of health insurance in 2011, its use now increasingly in many modern radiotherapy departments. Also the use of linear accelerator with high-energy photon beams over 10 MV is increasing. As is well known, these linacs have the capacity to produce photoneutrons due to photonuclear reactions in materials with a large atomic number such as the target, flattening filters, collimators, and multi-leaf collimators(MLC). MLC-based IMRT treatments increase the monitor units and the probability of production of photoneutrons from photon-induced nuclear reactions. The purpose of this study is to quantitatively evaluate the dose of photoneutrons produced from 3DCRT and IMRT technique for Rando phantom in cervical cancer. We performed the treatment plans with 3DCRT and IMRT technique using Rando phantom for treatment of cervical cancer. An Rando phantom placed on the couch in the supine position was irradiated using 15 MV photon beams. Optically stimulated luminescence dosimeters(OSLD) were attached to 4 different locations (abdomen, chest, head and neck, eyes) and from center of field size and measured 5 times each of locations. Measured neutron dose from IMRT technique increased by 9.0, 8.6, 8.8, and 14 times than 3DCRT technique for abdomen, chest, head and neck, and eyes, respectively. When using IMRT with 15 MV photon beams, the photoneutrons contributed a significant portion on out-of-field. It is difficult to prevent high energy photon beams to produce the photoneutrons due to physical properties, if necessary, It is difficult to prevent high energy photon beams to produce the photoneutrons due to physical properties, if necessary, it is need to provide the additional safe shielding on a linear accelerator and should therefore reduce the out-of-field dose.

Study on the photoneutrons produced in 15 MV medical linear accelerators : Comparison of three dimensional conformal radiotherapy and intensity modulated radiotherapy

International Nuclear Information System (INIS)

Yang, Oh Nam; Yang, Oh Nam; Lim, Cheong Hwan

2012-01-01

Intensity-modulated radiotherapy(IMRT) have the ability to provide better dose conformity and sparing of critical normal tissues than three-dimensional radiotherapy(3DCRT). Especially, with the benefit of health insurance in 2011, its use now increasingly in many modern radiotherapy departments. Also the use of linear accelerator with high-energy photon beams over 10 MV is increasing. As is well known, these linacs have the capacity to produce photoneutrons due to photonuclear reactions in materials with a large atomic number such as the target, flattening filters, collimators, and multi-leaf collimators(MLC). MLC-based IMRT treatments increase the monitor units and the probability of production of photoneutrons from photon-induced nuclear reactions. The purpose of this study is to quantitatively evaluate the dose of photoneutrons produced from 3DCRT and IMRT technique for Rando phantom in cervical cancer. We performed the treatment plans with 3DCRT and IMRT technique using Rando phantom for treatment of cervical cancer. An Rando phantom placed on the couch in the supine position was irradiated using 15 MV photon beams. Optically stimulated luminescence dosimeters(OSLD) were attached to 4 different locations (abdomen, chest, head and neck, eyes) and from center of field size and measured 5 times each of locations. Measured neutron dose from IMRT technique increased by 9.0, 8.6, 8.8, and 14 times than 3DCRT technique for abdomen, chest, head and neck, and eyes, respectively. When using IMRT with 15 MV photon beams, the photoneutrons contributed a significant portion on out-of-field. It is difficult to prevent high energy photon beams to produce the photoneutrons due to physical properties, if necessary, It is difficult to prevent high energy photon beams to produce the photoneutrons due to physical properties, if necessary, it is need to provide the additional safe shielding on a linear accelerator and should therefore reduce the out-of-field dose

SU-C-213-05: Evaluation of a Composite Copper-Plastic Material for a 3D Printed Radiation Therapy Bolus

Energy Technology Data Exchange (ETDEWEB)

Vitzthum, L; Ehler, E; Sterling, D; Reynolds, T; Higgins, P; Dusenbery, K [University of Minnesota, Minneapolis, MN (United States)

2015-06-15

Purpose: To evaluate a novel 3D printed bolus fabricated from a copper-plastic composite as a thin flexible, custom fitting device that can replicate doses achieved with conventional bolus techniques. Methods: Two models of bolus were created on a 3D printer using a composite copper-PLA/PHA. Firstly, boluses were constructed at thicknesses of 0.4, 0.6 and 0.8 mm. Relative dose measurements were performed under the bolus with an Attix Chamber as well as with radiochromic film. Results were compared to superficial Attix Chamber measurements in a water equivalent material to determine the dosimetric water equivalence of the copper-PLA/PHA plastic. Secondly, CT images of a RANDO phantom were used to create a custom fitting bolus across the anterolateral scalp. Surface dose with the bolus placed on the RANDO phantom was measured with radiochromic film at tangential angles with 6, 10, 10 flattening filter free (FFF) and 18 MV photon beams. Results: Mean surface doses for 6, 10, 10FFF and 18 MV were measured as a percent of Dmax for the flat bolus devices of each thickness. The 0.4 mm thickness bolus was determined to be near equivalent to 2.5 mm depth in water for all four energies. Surface doses ranged from 59–63% without bolus and 85–90% with the custom 0.4 mm copper-plastic bolus relative to the prescribed dose for an oblique tangential beam arrangement on the RANDO phantom. Conclusion: Sub-millimeter thickness, 3D printed composite copper-PLA/PHA bolus can provide a build-up effect equivalent to conventional bolus. At this thickness, the 3D printed bolus allows a level of flexure that may provide more patient comfort than current 3D printing materials used in bolus fabrication while still retaining the CT based custom patient shape. Funding provided by an intra-department grant of the University of Minnesota Department of Radiation Oncology.

A feasibility study for image guided radiotherapy using low dose, high speed, cone beam X-ray volumetric imaging

International Nuclear Information System (INIS)

Sykes, Jonathan R.; Amer, Ali; Czajka, Jadwiga; Moore, Christopher J.

2005-01-01

Background and purpose: Image Guidance of patient set-up for radiotherapy can be achieved by acquiring X-ray volumetric images (XVI) with Elekta Synergy and registering these to the planning CT scan. This enables full 3D registration of structures from similar 3D imaging modalities and offers superior image quality, rotational set-up information and a large field of view. This study uses the head section of the Rando phantom to demonstrate a new paradigm of faster, lower dose XVI that still allows registration to high precision. Materials and methods: One high exposure XVI scan and one low exposure XVI scan were performed with a Rando Head Phantom. The second scan was used to simulate ultra low dose, fast acquisition, full and half scans by discarding a large number of projections before reconstruction. Dose measurements were performed using Thermo Luminescent Dosimeters (TLD) and an ion chamber. The reconstructed XVI scans were automatically registered with a helical CT scan of the Rando Head using the volumetric, grey-level, cross-correlation algorithm implemented in the Syntegra software package (Philips Medical Systems). Reproducibility of the registration process was investigated. Results: In both XVI scans the body surface, bone-tissue and tissue air interfaces were clearly visible. Although the subjective image quality of the low dose cone beam scan was reduced, registration of both cone beam scans with the planning CT scan agreed within 0.1 mm and 0.1 deg. Dose to the patient was reduced from 28 mGy to less than 1 mGy and the equivalent scan speed reduced to one minute or less. Conclusions: Automatic 3D registration of high speed, ultra low dose XVI scans with the planning CT scan can be used for precision 3D patient set-up verification/image guidance on a daily basis with out loss of accuracy when compared to higher dose XVI scans

Kivirähk korraga kahel laval / Tiiu Laks

Index Scriptorium Estoniae

Laks, Tiiu, 1984-

2009-01-01

31. jaan. Ugalas esietenduvast Andrus Kivirähki esimesest näidendist "Vanamehed seitsmendalt" Peeter Tammearu lavastuses ja VAT Teatris lavale jõudvast Kivirähki uusimast tükist "Ingel, ingel, vii mind taeva" Aare Toikka lavastuses

Plaadid / Liina Valdre, Erik Aru, Tiiu Laks...[jt.

Index Scriptorium Estoniae

2007-01-01

Uutest heliplaatidest Dylan Donkin "Food For Thoughtlessness", Kreatiivmootor "Irratsionaalne", Coco Electrik "Army Behind The Sun", Marc Collin featuring Katrine Ottosen & Valente "Two For The Road", Korn "Untitled"

Kaks vaadet narkoelule ja tõlkimisele / Tiiu Laks

Index Scriptorium Estoniae

Laks, Tiiu, 1984-

2010-01-01

Arvustus: Thompson, Hunter Stockton. Hirm ja jälestus Las Vegases : metsik rännak Ameerika unelma südamesse / inglise keelest tõlkinud [ja järelsõna autor] Mihkel Kaevats. [Tallinn] : Eesti Päevaleht, 2010 ; Welsh, Irvine. Trainspotting : romaan / tõlkinud Olavi Teppan. Tallinn : Koolibri, 2010

Plaadid / Rein Vader, Heidi Purga, Tiiu Laks...[jt.

Index Scriptorium Estoniae

2008-01-01

Uutest heliplaatidest Nick Cave & The Bad Seeds "Dig, Lazarus, Dig!", Erykah Badu "New Amerikah Part One", Leslie da Bass "Nights By Open Windows", Jack Johnson "Sleep Througth The Static", Janet Jackson "Discipline", "Rock & Roll City"

Džässist Tallinnas 1918-1945 / Tiiu Lauk

Index Scriptorium Estoniae

Lauk, Tiiu

2011-01-01

Esimestest džässi mängimise katsetustest. Tallinna kohvikute ja restoranide džässiorkestritest. Tähtsamatest Tallinnas tegutsenud poolelukutselistest juhumänguorkestritest. Orkestrite stiilist, koosseisudest ja repertuaarist. Džässist kontserdilaval. Priit Veebelist, Hans Speegist ja Kuldsest Seitsmest kontserdilaval. Hans Speegi Plaza-kontsertidest

Enneolematud ja pärasttulematud indiviidid / Tiiu Leis

Index Scriptorium Estoniae

Leis, Tiiu

1998-01-01

Chaplini kunstikeskuses ja Pärnu mudaravilas avatud autopotreede näitusest 'Ma tunnen end paremini', lähemalt Ene-Liis Semperi videointallatsioonist 'Edasi-tagasi', John Coplansi, Pedro da Cruzi ja Kärt Putki töödest

VAT-teater vaatab 30 aastat tulevikku / Tiiu Laks

Index Scriptorium Estoniae

Laks, Tiiu, 1984-

2010-01-01

VAT Teater toob S. Becketti "Krappi viimase lindi" lavale ebatavalisel moel. Festivalil "Draama 2010" Tartus toimub 8. septembril esimene avalik lindistus "...viimane lint / Saare esimene lint". Kontseptsioon: Tanel Saar ja Co. Esitus: Tanel Saar ja Hanna Allsaar. Näitejuhid-konsultandid: Rait Avestik ja Aare Toikka. "Krappi viimane lint" esietendub VAT Teatri ja Tanel Saare esituses 2040. a. sügisel. Festivali "Draama 2010" kavast

Pean saama Eurovisioonile, muidu suren 2010 / Tiiu Laks

Index Scriptorium Estoniae

Laks, Tiiu, 1984-

2010-01-01

12. märtsil Nokia kontserdimajas toimunud konkursi Eesti laul 2010 finaalkontserdist, saatejuhtidest Ott Sepast ja Märt Avandist, Madis Aesma loodud Pean saama Eurovisioonile, muidu suren 2010 lugudest. Robin Juhkentali võidulaulust

Mineviku esitamine kui osa ajaloo loomisprotsessist / Tiiu Jaago

Index Scriptorium Estoniae

Jaago, Tiiu, 1960-

2011-01-01

Tutvustus: Heimo, Anne. Kapina Sammatissa : vuoden 1918 paikalliset tulkinnat osana historian yhteiskunnallisen rakentamisen prosessia. Helsinki : Suomalaisen Kirjallisuuden Seura, 2010 (dissertatsioon)

Joonas Hellerma otsib teed vastuste juurde / Tiiu Laks

Index Scriptorium Estoniae

Laks, Tiiu

2006-01-01

Vestlusest 21-aastase Joonas Hellermaga, kes on lõpetanud Tallinna Ülikooli filmi ja video eriala ja on 2006. aastast Eesti Humanitaarinstituudi filosoofia magistrant, toimetab ETV kultuurisaadet "OP!", on kirjutanud kultuurilehes Sirp ja koolipõlves töötanud ka raadios

Baltoscandal näitas Euroopa absurdi / Tiiu Laks

Index Scriptorium Estoniae

Laks, Tiiu, 1984-

2010-01-01

Rakveres 10. juulil lõppenud 11. rahvusvahelisest teatrifestivalist Baltoscandal. Prantslase Gerald Kurdiani kontsertetendusest "This is the Hello Monster!". Riina Maidre ja Maike Londi kontsertetendusest "PostUganda". Philippe Quesne'i ja tema trupi Vivarium Studio lavastusest "Big Bang". Taani tantsija Mette Ingvartseni lavastusest "Giant City". Akhe inseneriteatri lavastusest "Faust. 2360 sõna". Hollandi trupi Dood Paard lavastusest "Answer Me"

Unistusest lahutas vaid väin / Tiiu Speek

Index Scriptorium Estoniae

Speek, Tiiu

2004-01-01

1995. aasta augustis-septembris läbis 23 eestlast Livonial polaaruurijate John Franklini, Roald Amundseni ja Henry Larseni jälgedes Loodeväila. Rein Vahisalu raamatu "Amundseni nimekiri : eestlased Loodeväilas" (Tallinn, 2004) põhjal

Rahvusteema nüüdistantsu laval / Tiiu Laks

Index Scriptorium Estoniae

Laks, Tiiu, 1984-

2009-01-01

5. nov. Kanuti Gildi saalis esietenduvast tantsulavastusest "Tavaj", mille autoriteks ja esitajateks on Alissa Šnaider, Päär Pärenson ja Renzo van Steenbergen. Lavastus uurib eesti- ja venekeelsete elanike suhtlemist Eestis

"Vasha" on mitme lõpuga film / Tiiu Laks

Index Scriptorium Estoniae

Laks, Tiiu, 1984-

2009-01-01

Hannu Saloneni uuest mängufilmist "Vasha" (endine tööpealkiri "Kid ja Killer"), Eesti, Soome, Saksa ja Iiri koostööfilmist, kus kesksetes osades on türklane Mehmet Kurtulus, eestlastest Mart Müürisepp, Rein Oja, Jan Uuspõld jt

Plaadid / Mari Rebane, Heidi Purga, Tiiu Laks...[jt.

Index Scriptorium Estoniae

2008-01-01

Uutest heliplaatidest Sigur Ros "Heim/Hvart", Jay-Z "American Gangster", Bob Marley and The Wailers "Roots, Rock, Remixed", Ghostface killah "The Big doe Rehab", Backstreet Boys "Unbreakable", Matchbox Twenty "Exile on Mainstream", "Just" Hits 6"

Kümme teatristarti alustas suureks kasvamisega / Tiiu Laks

Index Scriptorium Estoniae

Laks, Tiiu,1984-

2010-01-01

Tallinna Linnateater annab kümnele algajale võimaluse lavastada professionaalses teatris. 6. oktoobril esietendunud monotükist "Suur mees juba", millega jõudis lavale kolm professionaalset debüüti korraga - Kaarel B. Väljamäe esimene teatritekst, Diana Leesalu esimene lavastus ning Priit Piusi esimene suur roll

Lavaka lõpetajate pink on pikk / Tiiu Laks

Index Scriptorium Estoniae

Laks, Tiiu, 1984-

2009-01-01

Kevadel lavakunstikooli lõpetavate tudengite lavastusest "Pikk pink" , mis koosneb kuuest lühiloost - Mait Jooritsa "Kantani padi", Kristjan Üksküla "Jääger" ja "Albioni tütar", Roland Laosi "Genees ja katastroof", Hendrik Toompere jun. jun. "Karupoeg Puhh" ja Kerttu Moppeli " Leib!". Etendused toimuvad Hobuveskis

Kuulsused võitlevad õiglase kaubanduse eest / Tiiu Laks

Index Scriptorium Estoniae

Laks, Tiiu, 1984-

2006-01-01

Arenenud riigid ekspordivad oma põllumajandusülejääke arengumaadesse, müües neid seal odavama hinnaga kui kohalikud põllumehed oma toodangut, nii jäävad kohalikud farmerid rahata. Mitmed maailmakuulsad näitlejad ja lauljad osalevad õiglase kaubanduse liikumises. Lisa: Make Trade Fair üritab ohjeldada heaoluriike

Hämmingut, striptiisi ja naeru Baltoscandalilt / Tiiu Laks

Index Scriptorium Estoniae

Laks, Tiiu, 1984-

2010-01-01

Itaalia eksperimentaalse teatri lavastaja Romeo Castellucci lavastusest "Hey Girl" ning briti näitleja Ursula Martinezi lavastusest "My Stories Your E-mails" Rakveres 7.-10. juulini toimunud teatrifestivalil Baltiscandal

Walking training associated with virtual reality-based training increases walking speed of individuals with chronic stroke: systematic review with meta-analysis

OpenAIRE

Juliana M. Rodrigues-Baroni; Lucas R. Nascimento; Louise Ada; Luci F. Teixeira-Salmela

2014-01-01

OBJECTIVE: To systematically review the available evidence on the efficacy of walking training associated with virtual reality-based training in patients with stroke. The specific questions were: Is walking training associated with virtual reality-based training effective in increasing walking speed after stroke? Is this type of intervention more effective in increasing walking speed, than non-virtual reality-based walking interventions? METHOD: A systematic review with meta-analysis of rando...

Narva linnuse arhitektuurivõistlus ja selle ülesanne / Toomas Paaver

Index Scriptorium Estoniae

Paaver, Toomas, 1976-

2015-01-01

SA Narva Muuseum korraldas arhitektuurivõistluse, et leida terviklik ruumiline lahendus Narva linnuse hoonete ja territooriumi ümberehituseks. Esimese koha sai töö märgusõnaga "Kaks sõpra" (Kalle Vellevoog, Tiiu Truus, Lidia Zarudnaja ja Martin Prommik arhitektuuribüroost JVR). Teise koha sai töö märgusõnaga "Ulm" (Jaan Kuusemets, Üllar Ambos, Pille Noole, Kaisa Lasner ja Ionnais Lykouras arhitektuuribüroost DAGOpen ja LÜNK Arhitektid"). Kolmanda koha sai töö märgusõnaga "Aedificium" (Ott Kadarik, Mihkel Tüür, Kristi Tuurmann, Kadri Tamme, Marleen Stokkeby, Viktoria Andrejeva, Constantin Rybkin ja Tanel Trepp arhitektuuribüroost KTA - Kadarik Tüür Arhitektid)

The Effect of Parenting Styles on Children Attachment Dimensions

OpenAIRE

علي زينالي

2014-01-01

The purpose of this study is to determine the effects of parenting style on prediction of children's attachment style. To achieve this aim, the study investigates whether different parenting styles (authoritative, authoritarian, permissive and neglectful) Leads to shaping various attachment styles (secure, fearful, preoccupied and dismissing) in children? 508 high school adolescent boys and girls with the age range of 14-19 participated in this study and were selected through Stratified Rando...

The Fermi Large Area Telescope on Orbit: Event Classification, Instrument Response Functions, and Calibration

Science.gov (United States)

2012-11-01

Technology (KTH), AlbaNova, SE-106 91 Stockholm, Sweden 8 Università di Pisa and Istituto Nazionale di Fisica Nucleare, Sezione di Pisa, I-56127 Pisa, Italy...France 10 Istituto Nazionale di Fisica Nucleare, Sezione di Trieste, I-34127 Trieste, Italy 11 Dipartimento di Fisica , Università di Trieste, I-34127...Trieste, Italy 12 Istituto Nazionale di Fisica Nucleare, Sezione di Padova, I-35131 Padova, Italy; rando@pd.infn.it 13 Dipartimento di Fisica e

Harm reduction as a strategy for supporting people who self-harm on mental health wards : the views and experiences of practitioners

OpenAIRE

James, Karen; Samuels, Isaac; Moran, Paul; Stewart, Duncan

2017-01-01

Background: Harm reduction has had positive outcomes for people using sexual health and substance misuse services. Clinical guidance recommends these approaches may be appropriately adopted by mental health practitioners when managing some people who self-harm. There has, however, been very little research in this area. Methods: We explored practitioners’ views of harm reduction as a strategy for supporting people who self-harm. The Self Harm Antipathy Scale (SHAS) was administered to a rando...

Lambda-cyhalothrin efficiency on fruit borer control and quali-quantitative spraying aspects in a pinecone crop

OpenAIRE

Jacqueline Lavinscky Costa Morais; Maria Aparecida Castellani; Carlos Gilberto Raetano; Juliana Alves de Macêdo; Moisés Silva Nery; Gabriela Luz Pereira Moreira

2016-01-01

ABSTRACT In Brazil, the state of Bahia is one of the largest pinecone (Annona squamosa L.) growers; nevertheless, fruit borer (Cerconota anonella L.) presence limits production. This research aimed to test the efficiency of lambda-cyhalothrin in controlling fruit borer using different spray volumes; additionally, this research tested qualitative and quantitative operational aspects. Trials were carried out in pinecone orchards in Caraíbas-BA, Brazil. Pesticide efficiency was tested by a rando...

Radiological protection in pelvis studies by computed tomography in Rando phantom by means of thermoluminescent dosimetry; Proteccion radiologica en estudios de pelvis por tomografia computada en fantoma Rando mediante dosimetria termoluminiscente

Energy Technology Data Exchange (ETDEWEB)

Madrid G, O. A.; Rivera M, T. [IPN, Centro de Investigacion en Ciencia Aplicada y Tecnologia Avanzada, Calz. Legaria 694, Col. Irrigacion, 11500 Mexico D. F. (Mexico); Azorin N, J., E-mail: riveramt@hotmail.com [Universidad Autonoma Metropolitana, Unidad Iztapalapa, Av. San Rafael Atlixco 186, Col. Vicentina, 09340 Mexico D. F. (Mexico)

2011-11-15

The risks of the radiation in computed tomography (CT) studies have been recently reported in many works. Caution should be had in the environment of the exploration in the patient. To maintain the radiation doses so low as is reasonably possible during the CT examination, is important that in the CT the parameters are correctly adjusted for each patient with the purpose of having the minimum dose in the application of the study. Thermoluminescent dosimeters were used to measure the absorbed dose and to measure the CT profiles of dose. The distribution of the dose in the CT abdominal examination in the simulated patients was evaluated. The exploration parameters of the CT were 130 kV, 90 m A, with a cut thickness of 3 mm and a field of 1.0 in the pitch. The assignment dose was increased in an axis along the direction of the study, they were also studied. The equivalent dose due to the direct and dispersed radiation was determined during the procedures of the irradiation in pelvis examinations, for the next areas to the study like is in specific the critical organ (gonads) that is the terminal area of the exploration. During this study of 26 cuts was obtained an equivalent dose to critical organ of 14.27 mSv. (Author)

Pediatric facial injuries: It's management

OpenAIRE

Singh, Geeta; Mohammad, Shadab; Pal, U. S.; Hariram,; Malkunje, Laxman R.; Singh, Nimisha

2011-01-01

Background: Facial injuries in children always present a challenge in respect of their diagnosis and management. Since these children are of a growing age every care should be taken so that later the overall growth pattern of the facial skeleton in these children is not jeopardized. Purpose: To access the most feasible method for the management of facial injuries in children without hampering the facial growth. Materials and Methods: Sixty child patients with facial trauma were selected rando...

Dosimetric verification of a software for planning of radio therapeutical treatments

International Nuclear Information System (INIS)

Alfonso, R.; Huerta, U.; Alfonso, J.L.; Torres, M.

1995-01-01

A software for radiation treatment planning was recently developed by medical physicists at the Hermanos Ameijeiras Hospital in Havana. Selected locations in head and neck region were used to evaluate the reliability of calculated dose distributions in patients, taking as a reference the results of dosimetric measurements with TLD-700 powder in a RANDO type phantom. The different options is shown. Causes of discrepancies are analyzed and recommendations are made for the use of data acquisitions options

Movement does not promote recovery of motor output following acute experimental muscle pain

DEFF Research Database (Denmark)

Schabrun, Siobhan M.; Palsson, Thorvaldur Skuli; Thapa, Tribikram

2018-01-01

Objective.:  To examine the effect of motor activity on the magnitude and duration of altered corticomotor output following experimental muscle pain. Design. : Experimental, pre-post test. Setting. : University laboratory. Subjects. : Twenty healthy individuals. Methods.:  Participants were rando....... Understanding corticomotor depression in the postpain period and what factors promote recovery has relevance for clinical pain syndromes where ongoing motor dysfunction, in the absence of pain, may predispose to symptom persistence or recurrence....

Tuberculosis among transhumant pastoralist and settled communities of south-eastern Mauritania

OpenAIRE

L?, Aissata; Tall-Dia, Anta; Bonfoh, Bassirou; Schelling, Esther

2016-01-01

Background: Transhumant pastoralists of Mauritania were assumed to have a high prevalence of tuberculosis (TB) because of reduced access to diagnostic testing. No population-based survey on TB has been published for Mauritania.Objective: The goal of this study was to estimate the prevalence of presumptive TB cases among mobile pastoralists and villagers in a remote zone of Mauritania.Design: In the south-eastern province of Hodh Ech Chargui, 250 adult pastoralists and 250 villagers were rando...

Design of the Intravenous Magnesium Efficacy in Acute Stroke (IMAGES) trial

OpenAIRE

Bradford, A.; Lees, K.

2000-01-01

The Intravenous Magnesium Efficacy in Acute Stroke (IMAGES) trial is a multicentre,randomised, placebo-controlled trial of magnesium sulphate (MgSO4) funded by the UK Medical Research Council. When complete, it will be the largest single neuroprotective study undertaken to date. Conscious patients presenting within 12 h of acute stroke with limb weakness are eligible. The primary outcome measure is combined death and disability as measured using the Barthel Index at 90-day follow up. By rando...

Do pregnant women know about danger signs of pregnancy and childbirth? – A study of the level of knowledge and its associated factors from a tertiary care hospital in Southern India

OpenAIRE

R Nithya; Gowri Dorairajan; Palanivel Chinnakali

2017-01-01

Background: Awareness about danger signs during pregnancy is essential for a woman to seek prompt care. This can avert long-term morbidity and mortality. This study was aimed to find the level of knowledge and its related factors about danger signs of pregnancy and childbirth among pregnant women attending a tertiary care hospital in southern India. Patients and Methods: We conducted a cross-sectional survey of pregnant women attending a tertiary care hospital in South India. Systematic rando...

Arukad asjad võtavad maailmas võimu / Tiiu Leis

Index Scriptorium Estoniae

Leis, Tiiu

2009-01-01

Arukate toodete disainiprojektist. Näited tudengite töödest: vibreeriv padi, vaikne sein, soojendav vest, helineeldematerjalid, valgustundlik kardin, tattoo-printer, helendav sall, riknemist tuvastav pakend, digivanaema, perereliikvia Relic, maksevahend-käevõru Smart-pay

IPO. Mäng suure orkestriga / Tiiu Pedaja, Gerd Laub

Index Scriptorium Estoniae

Pedaja, Tiiu

2006-01-01

Aktsiate avaliku pakkumise ehk IPO korraldamisest. Lisad: Millal on õige aeg?; Milline ettevõte sobib avalikuks pakkumiseks?; Milline avalik pakkumine on edukas?; Kuidas IPO-l aktsiaid jaotatakse? Skeemid: Aktsia hinna kujunemine avaliku pakkumise käigus; Järelturu aktsiahinda mõjutavad tegurid

Inimhääle lummus ja topeltverism / Tiiu Levald

Index Scriptorium Estoniae

Levald, Tiiu, 1940-

2008-01-01

Birgitta festivali raames 10. ja 11. VIII Pirita kloostris toimunud etendustest - Mascagni "Talupoja au", Leoncavallo "Pajatsid" ja Donizetti "Maria Stuart" Moskva Novaja Opera esituses, dirigendid: Eri Klas, Valeri Kritskov ja Sergei Lõssenko

Elu raamatute keskel : Kyra Roberti tegemisi meenutamas / Tiiu Reimo

Index Scriptorium Estoniae

Reimo, Tiiu, 1953-

2011-01-01

25. juulil 2011 möödus 95 aastat Kyra Roberti sünnist. Aprilli alguses Tallinna Ülikooli Akadeemilises Raamatukogus toimunud aastapäevakonverentsil meenutati selle maja kauaaegset töötajat ning avati mälestusnäitus

Kõik on kunst, kunst on kõikjal / Tiiu Leis

Index Scriptorium Estoniae

Leis, Tiiu

1998-01-01

25. juulil toimus Pärnus raehoovis kehamaalimise üritus, mille kuraatoriks Ene-Liis Semper, kunstnikud Marko Laimre, Kiwa, Jasper Zoova, Tarrvi Laamann ning mis toimus Barclay sigarettide reklaamikampaania 'Art is Everywhwere' (eestipoolne korraldaja Per Li ehk Pear Väli) raames.

Oodatav tsensuuri moment on osa kunstilisest teostusest / Tiiu Leis

Index Scriptorium Estoniae

Leis, Tiiu

1998-01-01

Viljandis toimunud kunstipäevade "Kiriküüt" raames Pärnu-Ikla-Tartu-Tallinna maanteel valminud "Maantee näituse", kus pärnakaist esinevad Andrus Joonas, Sütevaka Andres, Taave Tuutmaa, Kadri Alesmaa, filmile (teost. Jasper Zoova) jäädvustamiseks korraldatud bussireisist ja intsidendist graffiti'ga kaetud bussi pärast.

Pärimuslik ajalugu ja Fr. R. Kreutzwald / Tiiu Jaago

Index Scriptorium Estoniae

Jaago, Tiiu, 1960-

2005-01-01

Pärimuslik ajalugu kui rahvapärane ajalookäsitus, mida saab uurida folkloorse jutustamise kaudu. Fr. R. Kreutzwaldi ja F. K. H. Kruse sõnavõttudest Aruküla koobaste päritolu kohta ajakirjas "Das Inland" aastast 1844

Raamatupidamisalases täiendkoolituses osalemise võimalustest / Tiiu Hazak

Index Scriptorium Estoniae

Hazak, Tiiu

2002-01-01

Ilmunud ka: Buhgalterskije Novosti nr. 6 lk. 39-44. Järg Raamatupidamisuudised nr. 7 lk. 38-39. Koolituskavad ning erinevate koolitusfirmade hinnataseme võrdlus. Tabelid: raamatupidamisalast täiendkoolitust pakkuvad firmad 2001/2002 õ.-a.; koolitajate poolt enampakutud koolitusteemad raamatupidamise valdkonnas 2001/2002. õppeaastal

Diagnostic x-ray dosimetry using Monte Carlo simulation

International Nuclear Information System (INIS)

Ioppolo, J.L.; Tuchyna, T.; Price, R.I.; Buckley, C.E.

2002-01-01

An Electron Gamma Shower version 4 (EGS4) based user code was developed to simulate the absorbed dose in humans during routine diagnostic radiological procedures. Measurements of absorbed dose using thermoluminescent dosimeters (TLDs) were compared directly with EGS4 simulations of absorbed dose in homogeneous, heterogeneous and anthropomorphic phantoms. Realistic voxel-based models characterizing the geometry of the phantoms were used as input to the EGS4 code. The voxel geometry of the anthropomorphic Rando phantom was derived from a CT scan of Rando. The 100 kVp diagnostic energy x-ray spectra of the apparatus used to irradiate the phantoms were measured, and provided as input to the EGS4 code. The TLDs were placed at evenly spaced points symmetrically about the central beam axis, which was perpendicular to the cathode-anode x-ray axis at a number of depths. The TLD measurements in the homogeneous and heterogenous phantoms were on average within 7% of the values calculated by EGS4. Estimates of effective dose with errors less than 10% required fewer numbers of photon histories (1x10 7 ) than required for the calculation of dose profiles (1x10 9 ). The EGS4 code was able to satisfactorily predict and thereby provide an instrument for reducing patient and staff effective dose imparted during radiological investigations. (author)

Oxidized LDL levels decreases after the consumption of ready-to-eat meals supplemented with cocoa extract within a hypocaloric diet

OpenAIRE

Ibero-Baraibar, I. (Idoia); Abete, I. (Itziar); Navas-Carretero, S. (Santiago); Massis-Zaid, A. (A.); Martinez, J.A. (José Alfredo); Zulet, M.A. (María Ángeles)

2014-01-01

Background and aims Cocoa flavanols are recognised by their favourable antioxidant and vascular effects. This study investigates the influence on health of the daily consumption of ready-to-eat meals supplemented with cocoa extract within a hypocaloric diet, on middle-aged overweight/obese subjects. Methods and results Fifty healthy male and female middle-aged volunteers [57.26 ± 5.24 years and body mass index (BMI) 30.59 ± 2.33 kg/m2] were recruited to participate in a 4 week rando...

Irradiation of parametria by double-wedge

International Nuclear Information System (INIS)

Weisz, Csaba; Katona, Ernoe; Zarand, Pal; Polgar, Istvan; Nemeth, Gyoergy

1984-01-01

The dose distribution of a cobalt unit modified with a double-wedge as well as its combination with intracavitary radiotherapy was investigated. The measurements were made in both Alderson-Rando and wather phantom by using film densitometry, thermoluminescence dosimetry and ionization chambers. The dose distribution calculated on the basis of the Van de Geij program was in good agreement with the measurements. A homogeneous irradiation of the parametria can be obtained by using a combination of intracavitary and external double-wedge irradiation. (author)

New strategies for collision resolution of multi-access channel

Institute of Scientific and Technical Information of China (English)

无

2007-01-01

Multi-access protocol is one of the commonlyapplied access control protocols,in which commonchannels is shared by multi-users(as shown inFig.1).In recent years,this protocol has been suc-cessfully applied to various communication sys-tems[1].Typical examples are satellite communica-tion system,mobile communication system,localarea net work(LAN)and metropolitan area net work(MAN).There are chiefly three kinds of Multi-ac-cess channel models,i.e.fixed allocation model,self-adjusting allocation model and rando...

Kunstisuvi 2008, esimene osa / Andri Ksenofontov

Index Scriptorium Estoniae

Ksenofontov, Andri, 1962-

2008-01-01

Eesti Maalikunstnike Liidu aastanäitused: Mara Koppel-Ljutjuki ja Toomas Tõnissoo kureeritud "Perfektne ring" ArtDepoo galeriis, Tiiu Talvistu ja Mare Joonsalu kureeritud "Äratus" Rotermanni soolalaos. Mart Lepa ja Rene Kuulmanni kogudest avatud näitus "Kirg ja valu" Tartu Kunstimuuseumis. Ilmar Kruusamäe näitus "30 aastat hiljem" Tampere majas. Tartu Ülikooli maaliosakonna lõputööde väljapanekud Tartu Kunstimaja monumentaalgaleriis (Eda Lõhmus), Athena keskuses (Natali Pahapill) ja Tartu Kunstimuuseumis (Maria Ader, Riho Pärn, Katrin Paomets). Vaal-galerii korraldatud rändnäitus "Sinimustvalge eesti kunstis" Tartu Kunstimajas. Ernö Kochi näitus Haus galeriis. Maret Olveti näitus Vabaduse ja SEBi galeriis. Vive Tolli juubelinäitused Tallinna Kunstihoone galeriis ja Eesti Lastekirjanduse Keskuses

The Big Mac Index 21 Years On: An Evaluation of Burgereconomics

OpenAIRE

Kenneth W. Clements; Yihui Lan; Shi Pei Seah

2007-01-01

The Big Mac Index, introduced by The Economist magazine 21 years ago, claims to provide the “true value” of a large number of currencies. This paper assesses the economic value of this index. We show that (i) the index suffers from a substantial bias; (ii) once the bias is allowed for, the index tracks exchange rates reasonably well over the medium to longer term in accordance with relative purchasing power parity theory; (iii) the index is at least as good as the industry standard, the rando...

Experimental method for calculation of effective doses in interventional radiology; Metodo experimental para calculo de dosis efectivas en radiologia intervencionista

Energy Technology Data Exchange (ETDEWEB)

Herraiz Lblanca, M. D.; Diaz Romero, F.; Casares Magaz, O.; Garrido Breton, C.; Catalan Acosta, A.; Hernandez Armas, J.

2013-07-01

This paper proposes a method that allows you to calculate the effective dose in any interventional radiology procedure using an anthropomorphic mannequin Alderson RANDO and dosimeters TLD 100 chip. This method has been applied to an angio Radiology procedure: the biliary drainage. The objectives that have been proposed are: to) put together a method that, on an experimental basis, allows to know dosis en organs to calculate effective dose in complex procedures and b) apply the method to the calculation of the effective dose of biliary drainage. (Author)

Comparison between the distribution of the calculated dose and the media with thermoluminescent dosemeters 7 LiF in bladder tumor

International Nuclear Information System (INIS)

Araujo, A.M.C. de.

1974-01-01

For the central plane of an assumed malignant tumor of the bladder, Cobalt - 60 treatment plans were calculated from published isodose curves. The calculation was done for the three field technique, unbalanced and balanced, and for 120 degree rotational therapy with wedge filter. A Rando-Alderson phantom and calibrated encapsulated 7 LiF dosimeters with a standard deviation better than 3% of each were used to verify the treatment plans. Furthermore the dose distribution to an assumed extension of the tumor and to the rectum were measured. (author)

Exposure to gonads and eyes due to computerised tomography for brain scanning

International Nuclear Information System (INIS)

Pin-Chieh Hsu; Pao-Shan Weng; Ling-Nah Su

1986-01-01

Eye and gonad doses for some 150 patients were determined using thermoluminescence dosemeters. Doses received during CT scanning using a Toshiba scanner were compared with those obtained using a Pfizer scanner. A female Rando phantom was also used as the reference. For males, the average eye dose for the Toshiba was 1695+-2041 μGy per slice and the gonad dose was 2.0+-1.5 μGy per slice; for females it was 1953+-1923 μGy per slice for eyes and 0.4+-0.3 μGy per slice for gonads. (author)

Evaluation of fetal dose from megavoltage irradiation of the knee and neonate followup

International Nuclear Information System (INIS)

Nair, R.P.; Nair, T.K.; El-Akkad, S.

1983-01-01

A 24-yr-old female patient who was to undergo radiation therapy management for a recurrent low-grade fibrosarcoma on her right knee was found to be 9 weeks pregnant. The patient and her relatives insisted on carrying the pregnancy to maturity, despite undergoing irradiation of her right knee for local control of her disease and to take the teratological risk, if any, that it entails. This paper discusses the measurement of scattered dose in water, fetal dose estimation in an Alderson-Rando human phantom and possible ways of minimizing it

Evaluation of fetal dose from megavoltage irradiation of the knee and neonate followup

International Nuclear Information System (INIS)

Nair, R.P.; Nair, T.K.M.; El-Akkad, S.

1983-01-01

A 24-yr-old female patient who was to undergo radiation therapy management for a recurrent low-grade fibrosarcoma on her right knee was found to be 9 weeks pregnant. The patient and her relatives insisted on carrying the pregnancy to maturity, despite undergoing irradiation of her right knee for local control of her disease and to take the teratological risk, if any, that it entails. This paper discusses the measurement of scattered dose in water, fetal dose estimation in an Alderson--Rando human phantom and possible ways of minimizing it

Postoperative telegammatherapy of breast cancer (Dosimetric studies)

Energy Technology Data Exchange (ETDEWEB)

Todorov, J; Mitrov, G [Nauchno-Izsledovatelski Onkologichen Inst., Sofia (Bulgaria); Konstantinov, B; Dobrev, D [Meditsinska Akademiya, Sofia (Bulgaria). Nauchen Inst. po Rentgenologiya i Radiobiologiya

1977-01-01

The method employed for postoperative radiation therapy of breast cancer at the Radiologic Clinic of the Medical Academy in Sofia is described. Results are reported and discussed of dosimetric studies carried out with the T-100 on heterogeneous tissue-equivalent Rando phantom for dose distributions in the regional lymph basin and the underlying tissues and organs. The results show coincidence between calculated and measured doses in the regional lymph basin and the thoracic wall. It was demonstrated that maximal radiation loading (3600 to 5500 rad) occurs in the apical and the hilar lung area.

Lepatriinu tuleb Tallinna lõhkuma / Gary Olson ; interv. Tiiu Laks

Index Scriptorium Estoniae

Olson, Gary

2006-01-01

Uutest heliplaatidest Deftones "Saturday Night Wrist", Robb Scott "Afro Adyssey", Zucchero "Fly", Agoria "The Green Armchair", "Back To The Bus ئ Babyshambes", Fratellis "Costello Music", Rod Stewart "Still The Same..."

Ekspertiis päästis mehe mõrtsukatiitlist / Tiiu Põld

Index Scriptorium Estoniae

Põld, Tiiu, 1945-

2007-01-01

Kohtulahendist, kus maakohus saatis mehe eaka naise tapmise eest 12. aastaks vangi, aga ringkonnakohus vabastas ta paar kuud hiljem selgitades DNA-analüüsi abil, et ta on süütu. Lisatud: alusetu vangistus läheb kalliks

Bauhausi pedagoogika mõju üldhariduslikule kunstiõpetusele / Tiiu Põldemaa

Index Scriptorium Estoniae

Põldemaa, Tiiu

1998-01-01

20. saj. 20-30-ndatel aastatel välja kujunenud Bauhausi pedagoogika on paljus aluseks viimaste kümnendite kunstiõpetuse suundumuste kujunemisel. Eesti kunstiõpetuses on Bauhausi pedagoogika põhimõtteid osaliselt rakendatud algklasside ühendatud kunsti- ja tööõpetuse õppekavades

EurAsia parim film on venelaste "Minu õnn" / Tiiu Laks

Index Scriptorium Estoniae

Laks, Tiiu, 1984-

2010-01-01

14. Pimedate Ööde Filmifestivali rahvusvahelise võistlusprogrammi EurAsia võidufilmiks valiti David Willise juhitud žürii poolt Sergei Loznitsa mängufilmidebüüt „Minu õnn” ("My Joy", Ukraina- Holland- Saksamaa). Loetletud filmifestivali erinevate konkursside võitjad ja auhinnasaajad

Kardetud ja kartmatud - vangla sotsiaaltöötajad / Tiiu Rahuoja

Index Scriptorium Estoniae

Rahuoja, Tiiu

2006-01-01

Artikli autori, kes töötas Tartu Vangla sotsiaalosakonnas augustist 2004 - novembrini 2005, vanglasotsiaaltöö kogemusest. Kommenteerivad Tallinna vangla sotsiaalosakonna juhataja Eerik Lätti ja Harku vangla sotsiaalosakonna juhataja, sotsiaaltöö mag Christel Punn

Madalmaade nukunäitlejate paremik hiilgas Tallinn Treffil / Tiiu Laks

Index Scriptorium Estoniae

Laks, Tiiu, 1984-

2010-01-01

5.-8. juunini 2010 toimuvast rahvusvahelisest festivalist Tallinn Treff. Hollandi trupi DudaPaiva lavastusest "Needus". Nukunäitleja Neville Tranteri (Austraalia-Holland) lavastusest "Punch ja Judy Afganistanis". Stef Vettersi (Belgia) etendusest "Tema kõrgeausus Ottfriedi tundmatu maailm"

Laste- ja noorteteater on lehviku laiali tõmmanud / Tiiu Laks

Index Scriptorium Estoniae

Laks, Tiiu, 1984-

2008-01-01

Eestis kaheksandat korda toimuvast rahvusvahelisest laste- ja noorteteatrite päevast Eesti Rahvusraamatukogu teatrisaalis, kus näeb tasuta etendusi Emajõe Suveteatrilt, Jõhvi Teatrilt Tuuleveski ja VAT Teatrilt

Tõuni imekitarr kõlab nagu mesi . Pedaal-steel teeb popmuusikas taassündi / Rando Tooming

Index Scriptorium Estoniae

Tooming, Rando

2009-01-01

Muusik Tõnu Timm jutustab loo, kuidas hankis Ameerikast haruldase pedaal-steel- kitarri. Eesti kasutusel olevatest vanematest pedaal-steel-kitarridest. Ansamblid, kus kasutatakse kõneall olevat kitarri

A customized bolus produced using a 3-dimensional printer for radiotherapy.

Directory of Open Access Journals (Sweden)

Shin-Wook Kim

Full Text Available OBJECTIVE: Boluses are used in high-energy radiotherapy in order to overcome the skin sparing effect. In practice though, commonly used flat boluses fail to make a perfect contact with the irregular surface of the patient's skin, resulting in air gaps. Hence, we fabricated a customized bolus using a 3-dimensional (3D printer and evaluated its feasibility for radiotherapy. METHODS: We designed two kinds of bolus for production on a 3D printer, one of which was the 3D printed flat bolus for the Blue water phantom and the other was a 3D printed customized bolus for the RANDO phantom. The 3D printed flat bolus was fabricated to verify its physical quality. The resulting 3D printed flat bolus was evaluated by assessing dosimetric parameters such as D1.5 cm, D5 cm, and D10 cm. The 3D printed customized bolus was then fabricated, and its quality and clinical feasibility were evaluated by visual inspection and by assessing dosimetric parameters such as Dmax, Dmin, Dmean, D90%, and V90%. RESULTS: The dosimetric parameters of the resulting 3D printed flat bolus showed that it was a useful dose escalating material, equivalent to a commercially available flat bolus. Analysis of the dosimetric parameters of the 3D printed customized bolus demonstrated that it is provided good dose escalation and good contact with the irregular surface of the RANDO phantom. CONCLUSIONS: A customized bolus produced using a 3D printer could potentially replace commercially available flat boluses.

Feasibility and radiation dose of high-pitch acquisition protocols in patients undergoing dual-source cardiac CT.

Science.gov (United States)

Sommer, Wieland H; Albrecht, Edda; Bamberg, Fabian; Schenzle, Jan C; Johnson, Thorsten R; Neumaier, Klement; Reiser, Maximilian F; Nikolaou, Konstatin

2010-12-01

The objective of this study was to compare image quality and radiation dose between high-pitch and established retrospectively and prospectively gated cardiac CT protocols using an Alderson-Rando phantom and a set of patients. An anthropomorphic Alderson-Rando phantom equipped with thermoluminiscent detectors and a set of clinical patients underwent the following cardiac CT protocols: high-pitch acquisition (pitch 3.4), prospectively triggered acquisition, and retrospectively gated acquisition (pitch 0.2). For patients with sinus rhythm below 65 beats per minute (bpm), high-pitch protocol was used, whereas for patients in sinus rhythm between 65 and 100 bpm, prospective triggering was used. Patients with irregular heart rates or heart rates of ≥ 100 bpm, were examined using retrospectively gated acquisition. Evaluability of coronary artery segments was determined, and effective radiation dose was derived from the phantom study. In the phantom study, the effective radiation dose as determined with thermoluminescent detector (TLD) measurements was lowest in the high-pitch acquisition (1.21, 3.12, and 11.81 mSv, for the high-pitch, the prospectively triggered, and the retrospectively gated acquisition, respectively). There was a significant difference with respect to the percentage of motion-free coronary artery segments (99%, 87%, and 92% for high-pitch, prospectively triggered, and retrospectively gated, respectively (p pitch protocol (p pitch scans have the potential to reduce radiation dose up to 61.2% and 89.8% compared with prospectively triggered and retrospectively gated scans. High-pitch protocols lead to excellent image quality when used in patients with stable heart rates below 65 bpm.

A customized bolus produced using a 3-dimensional printer for radiotherapy.

Science.gov (United States)

Kim, Shin-Wook; Shin, Hun-Joo; Kay, Chul Seung; Son, Seok Hyun

2014-01-01

Boluses are used in high-energy radiotherapy in order to overcome the skin sparing effect. In practice though, commonly used flat boluses fail to make a perfect contact with the irregular surface of the patient's skin, resulting in air gaps. Hence, we fabricated a customized bolus using a 3-dimensional (3D) printer and evaluated its feasibility for radiotherapy. We designed two kinds of bolus for production on a 3D printer, one of which was the 3D printed flat bolus for the Blue water phantom and the other was a 3D printed customized bolus for the RANDO phantom. The 3D printed flat bolus was fabricated to verify its physical quality. The resulting 3D printed flat bolus was evaluated by assessing dosimetric parameters such as D1.5 cm, D5 cm, and D10 cm. The 3D printed customized bolus was then fabricated, and its quality and clinical feasibility were evaluated by visual inspection and by assessing dosimetric parameters such as Dmax, Dmin, Dmean, D90%, and V90%. The dosimetric parameters of the resulting 3D printed flat bolus showed that it was a useful dose escalating material, equivalent to a commercially available flat bolus. Analysis of the dosimetric parameters of the 3D printed customized bolus demonstrated that it is provided good dose escalation and good contact with the irregular surface of the RANDO phantom. A customized bolus produced using a 3D printer could potentially replace commercially available flat boluses.

Computed tomography automatic exposure control techniques in 18F-FDG oncology PET-CT scanning.

Science.gov (United States)

Iball, Gareth R; Tout, Deborah

2014-04-01

Computed tomography (CT) automatic exposure control (AEC) systems are now used in all modern PET-CT scanners. A collaborative study was undertaken to compare AEC techniques of the three major PET-CT manufacturers for fluorine-18 fluorodeoxyglucose half-body oncology imaging. An audit of 70 patients was performed for half-body CT scans taken on a GE Discovery 690, Philips Gemini TF and Siemens Biograph mCT (all 64-slice CT). Patient demographic and dose information was recorded and image noise was calculated as the SD of Hounsfield units in the liver. A direct comparison of the AEC systems was made by scanning a Rando phantom on all three systems for a range of AEC settings. The variation in dose and image quality with patient weight was significantly different for all three systems, with the GE system showing the largest variation in dose with weight and Philips the least. Image noise varied with patient weight in Philips and Siemens systems but was constant for all weights in GE. The z-axis mA profiles from the Rando phantom demonstrate that these differences are caused by the nature of the tube current modulation techniques applied. The mA profiles varied considerably according to the AEC settings used. CT AEC techniques from the three manufacturers yield significantly different tube current modulation patterns and hence deliver different doses and levels of image quality across a range of patient weights. Users should be aware of how their system works and of steps that could be taken to optimize imaging protocols.

Construction of an analytic-realistic phantom for adaptation of the radiographic techniques in any conventional X-ray equipment

International Nuclear Information System (INIS)

Pina, D.R.; Ghilardi Netto, T.; Trad, C.S.; Brochi, M.A. Corte; Duarte, S.B.; Pina, S.R.

2001-01-01

In the present work we construct a homogeneous phantom, for calibrating the X-ray beam. Each homogeneous phantom was used in the time-scale sensitometric method for obtaining a radiographic technique which is able to produce in the film, an optical density around 1,0 higher than the density of base plus fog. These radiographic techniques were applied in a anthropomorphic phantom (Rando) and its images were analyzed by specialists in radiology. They identified the best image and then a ideal radiographic technique for a standard patient with smaller doses, at any conventional X-ray equipment. (author)

Dose distribution in lungs and thyroid from scatter photons of x-ray mammography imaging

International Nuclear Information System (INIS)

Faghihi, R.; Mehdizadeh, S.

2006-01-01

The contribution of scatter photons in dose of mammography image in thyroid and lungs are studied. Thyroid and in the form of distribution function and total delivered dose studied by direct measurement with Thermoluminescence dosimeter. The results of measurements compared to other published measurements and the total dose compared to our modelling with Monte Carlo method.. Our phantoms for direct measurement of Dose are a compressed breast phantom placed on a female RANDO phantom. The results of modelling and measurement are in agreement for the total delivered dose to thyroid and lungs and comparable to doses reported by the other researcher

Measurements of dose distribution in thyroids, gonads, crystalline and other organs, for radio-diagnostics with computorized tomography

International Nuclear Information System (INIS)

Coelho, M.J.

1983-01-01

An evaluation of radiation doses in organs, from radiologic examinations by computorized tomography was done, comparing with theoretic data obtained by Monte Carlo method. The measurements were done with help of a 'Rando Alderson Phantom' exposed to irradiation coming from a 0450 AS and E Pfizer Tomographic. The cases under study were the head and abdomen examinations. The dose assessment was done by using mini TLD's of LiF. The calculated dose equivalents were obtained by using the Monte Carlo method applied to a mathematical antropomorphic phantom, simulating the same experimental arrangements. The results were compared with the experimental one. (E.G.) [pt

Total irradiation due to radiodiagnostic procedures in France, 1982

International Nuclear Information System (INIS)

Fagnani, F.; Maccia, C.; Benedittini, M.; Lefaure, C.

1986-01-01

This paper recalls the main concepts of dosimetry which are useful when assessing the collective dose to the patient from medical X-ray examinations. It describes the general protocol which has been followed in measuring dose associated to each x-ray exam (antropomorphic Rando phantom, in vivo measurement) and gives some results about the variations of parameters such as the mAs, the kVp and the fluoroscopy screening time. As far as the gonadal dose and the effective dose equivalent are concerned a first evaluation is given per type of examination carried out in France in 1982 [fr

LongoVital i forebyggelsen af recidiverende aftøs stomatit. 1

DEFF Research Database (Denmark)

Pedersen, A; Hougen, H P; Klausen, B

1991-01-01

LongoVital (LV) (DK. reg. no. 5178/75) is a herbal based tablet enriched with recommended doses of vitamins. The present study was undertaken to investigate prevention of recurrent aphthous ulceration (RAU) during daily intake of LV for six months as compared with placebo in a double-blind, rando......LongoVital (LV) (DK. reg. no. 5178/75) is a herbal based tablet enriched with recommended doses of vitamins. The present study was undertaken to investigate prevention of recurrent aphthous ulceration (RAU) during daily intake of LV for six months as compared with placebo in a double...

Kutseõppeasutuste õpetajad = Pedagogues of vocational education institutions / Tiiu-Liisa Rummo

Index Scriptorium Estoniae

Rummo, Tiiu-Liisa

2007-01-01

Eesti lähituleviku eesmärgiks on motiveerida kutsehariduse pedagooge ja spetsialiste kutseharidussüsteemis töötama. Kutseõppeasutuste pedagoogid vanuserühma, soo, ametijärgu ja haridusastme järgi. Lisatud diagramm ja tabelid

Andres Noormets - olemuselt luuletaja, vormilt lavastaja / Andres Noormets ; intervjueerinud Tiiu Laks

Index Scriptorium Estoniae

Noormets, Andres, 1963-

2010-01-01

Andres Noormets endast, oma lavastustest, näitlemisest ja lavastamisest, elu mõttest, uue otsimisest oma teatritöödega, sellest, mis endiselt paelub teatris ja praegusi teatritegemisi enim mõjutab, ise kirjutamisest jm. Andres Noormetsa eluloolisi andmeid

Tallinna Jaani kogudus jagas oma esimesed tänuristid / Tiiu Pikkur

Index Scriptorium Estoniae

Pikkur, Tiiu, 1947-

2008-01-01

14. detsembril tähistas Tallinna Jaani kogudus oma 141. aastapäeva ja andis esmakordselt neljateistkümnele pikka aega kogudust teeninud ja kiriku suurremondiga enim seotud inimesele koguduse tänuristid

Mis oli ja mida ei olnud : lisandusi kahele kirjutisele / Tiiu Erelt

Index Scriptorium Estoniae

Erelt, Tiiu, 1942-

2008-01-01

Lisandusi artiklitele: Koppel, Margit-Mariann. Mahalaskmine pärast surma //Eesti Ekspress, 23. aug. 2007, mis käsitleb Elmar Muugi saatust, ning: Raag, Raimo. Valter Tauli elust ja keelelisest tegevusest // Keel ja Kirjandus, (2007/Nov), nr. 11

Augusti Tantsufestival lõppeb lõbusalt / Oleg Sulimenko ; intervjueerinud Tiiu Laks

Index Scriptorium Estoniae

Sulimenko, Oleg

2010-01-01

Vene koreograafide-tantsijate Oleg Sulimenko (elab Viinis) ja Andrei Andrianovi tantsulavastusest "Made in Russia", mis lõpetab 11. Augusti Tantsufestivali Tallinnas. Kuraator Priit Raud 14.-28. augustini kestva festivali kavast

Measurement of radiation power from the JIPP T-IIU tokamak plasma

International Nuclear Information System (INIS)

Ogawa, Isamu.

1987-04-01

Characteristics of a pyroelectric detector, a metal-film bolometer and a thermistor are investigated in order to attain high reliability of the bolometric measurement. The spurious signal which appears on a pyroelectric detector is efficiently eliminated by setting a mask close to the detector, which has a function of avoiding the direct incidence of photons on its electrode. This is verified with the consistency of integrated value of the signal. The detector is calibrated with a HeNe laser taking the reflection on the detector surface into account. No temporal change has been seen on the sensitivity of the detector calibrated by this method. We also developed a thin metal-film bolometer with high sensitivity (12.9 Ω/mJ), high time response (3 μs) and well defined thermal characteristics. The calibration of this detector was performed by supplying a bias current through its resistor. We constructed a bolometric system with high time response and high spatial resolution, which consisted of twelve pyroelectric detectors and a metal-film bolometer. The radiation power measured with the pyroelectric detector agrees with that measured with the calibrated metal-film bolometer within 10 %. Spectroscopic and bolometric measurements with spatial and temporal resolution show that large radiation loss brings about the decrease in electron and ion temperatures and plasma energy. Carbon limiters have an effect to suppress the radiation power for ohmic plasma, but are insufficient for ICRF heated plasma. The main contribution to radiation power may be attributed to Fe impurity released from the ICRF antennae, the Faraday shield and vacuum vessel. By making carbonization of the wall and in-vessel components, the Fe impurity is suppressed to a low level (n Fe /n e ∼ 0.04 %) and the radiation power is reduced to P rad /(P OH + P rf ) ∼ 20 % and emissivity throughout the plasma region is reduced. (author)

Kormašov puhus Leonardo autoportree intriigi lõkkele / Tiiu Leis

Index Scriptorium Estoniae

Leis, Tiiu

2010-01-01

Kadrioru Kunstimuuseumis eksponeeritakse Leonardo da Vinci arvatavat autoportreed. Lõuna-Itaalia erakogust leitud maali uurimisprotsessi kaasati Tallinna Ülikooli kunstiosakonna juhataja, maali ja maalitehnoloogia õppejõud Orest Kormašov, kes jagab selgitusi maali uuringute kohta. Ekspertiisis osales ka Eesti Kunstiakadeemia graafilise disaini tudeng Helen Kokk

Eesti esinaivisti 100. sünniaastapäev / Tiiu Männiste

Index Scriptorium Estoniae

Männiste, Tiiu, 1959-

2000-01-01

Paul Kondase 100. sünniaastapäeva puhul tema maalide näitus Viljandi kunstisaalis. Avamisel demonstreeris Mark Soosaar oma filmi "Pühapäevamaalijad". Kilpkonna galeriis näitusel "Veel naiviste" Joan (?Joann) Sõstra (1913-1992) (puuskulptuurid), Osvald Raba (1909-1996) ja Arnold Vihmandi (1912) looming.

Fast potential change in sawteeth in JIPP T-IIU tokamak plasmas

International Nuclear Information System (INIS)

Hamada, Y.; Nishizawa, A.; Kawasumi, Y.

1994-12-01

Fast changes of electric potential with different polarities are observed during sawtooth oscillation in a core region of a tokamak plasma using a heavy ion beam probe. The potential change inside the inversion radius is found to be positive. The change is negative outside the inversion radius and shows clearly a propagation nature. The observed potential can be interpreted by the mixture of the potentials of two origins. One of them drives the fast MHD plasma motion through E/B drift and the other is a barrier potential induced by mixing of hot and cold plasmas at sawtooth crash. (author)

Niguliste kirikul uus orel, Jaani kirikus algab vana taastamine / Tiiu Pikkur

Index Scriptorium Estoniae

Pikkur, Tiiu, 1947-

2005-01-01

Orelimeister Ago Tint lõpetas 9. saj lõpul Gustav Terkmanni ehitatud oreli (asus kuni 2005. a. alguseni Teatri- ja Muusikamuuseumis) restaureerimise ja orel paigutati Tallinna Niguliste kiriku Püha Antoniuse kabelisse. Sõlmiti Tallinna Jaani kiriku oreli restaureerimise ja uue oreli hankimise leping (töö teostab Saksamaa oreliehitusfirma Martin Ter Haseborg). Mõlema ettevõtmise eestvedajaks on orelikunstnik Andres Uibo

Ühe väljasurnud kala lugu Saaremaalt / Tiiu Märss

Index Scriptorium Estoniae

Märss, Tiiu, 1943-

2011-01-01

Saaremaalt Himmistest leitud siluriaegse telodondi Phlebolepis elegans Panderi kivististest ning Himmiste paemurru laastamisest ja üle 3500 kivistunud merelooma väljaveost Ameerikasse 1930nendatel William Patteni poolt

Rein Kilk ei loobu Pärnust / Rein Kilk ; interv. Tiiu Leis

Index Scriptorium Estoniae

Kilk, Rein, 1953-

2007-01-01

Ilmunud ka: Linnaleht : Tartu, 12. okt. 2007, lk. 7-8; Linnaleht : Pärnu, 12. okt. 2007, lk. 7-8. Suurärimees Rein Kilk vastab küsimustele vanade majade taastamisest, plaanidest Pärnus, suhtumisest heidikutesse. Kommenteerivad Peeter Raudsepp ja Elmar Lepp

Isa Philippe Jourdan võttis vastu Tallinna Toomkiriku autasu / Tiiu Pikkur

Index Scriptorium Estoniae

Pikkur, Tiiu, 1947-

2008-01-01

5. oktoobril toimunud jumalateenistusel Tallinna Toomkirikus anti koguduse selle aasta kultuuripreemia laureaadile, Rooma-Katoliku Kririku Eesti apostellikule administraatorile piiskop Philippe Jourdanile üle Maarja medal

Peripheral photon and neutron doses from prostate cancer external beam irradiation.

Science.gov (United States)

Bezak, Eva; Takam, Rundgham; Marcu, Loredana G

2015-12-01

Peripheral photon and neutron doses from external beam radiotherapy (EBRT) are associated with increased risk of carcinogenesis in the out-of-field organs; thus, dose estimations of secondary radiation are imperative. Peripheral photon and neutron doses from EBRT of prostate carcinoma were measured in Rando phantom. (6)LiF:Mg,Cu,P and (7)LiF:Mg,Cu,P glass-rod thermoluminescence dosemeters (TLDs) were inserted in slices of a Rando phantom followed by exposure to 80 Gy with 18-MV photon four-field 3D-CRT technique. The TLDs were calibrated using 6- and 18-MV X-ray beam. Neutron dose equivalents measured with CR-39 etch-track detectors were used to derive readout-to-neutron dose conversion factor for (6)LiF:Mg,Cu,P TLDs. Average neutron dose equivalents per 1 Gy of isocentre dose were 3.8±0.9 mSv Gy(-1) for thyroid and 7.0±5.4 mSv Gy(-1) for colon. For photons, the average dose equivalents per 1 Gy of isocentre dose were 0.2±0.1 mSv Gy(-1) for thyroid and 8.1±9.7 mSv Gy(-1) for colon. Paired (6)LiF:Mg,Cu,P and (7)LiF:Mg,Cu,P TLDs can be used to measure photon and neutron doses simultaneously. Organs in close proximity to target received larger doses from photons than those from neutrons whereas distally located organs received higher neutron versus photon dose. © The Author 2015. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oup.com.

Sci-Thur AM: YIS – 07: Optimizing dual-energy x-ray parameters using a single filter for both high and low-energy images to enhance soft-tissue imaging

International Nuclear Information System (INIS)

Bowman, Wesley; Sattarivand, Mike

2016-01-01

Objective: To optimize dual-energy parameters of ExacTrac stereoscopic x-ray imaging system for lung SBRT patients Methods: Simulated spectra and a lung phantom were used to optimize filter material, thickness, kVps, and weighting factors to obtain bone subtracted dual-energy images. Spektr simulations were used to identify material in the atomic number (Z) range [3–83] based on a metric defined to separate spectrums of high and low energies. Both energies used the same filter due to time constraints of image acquisition in lung SBRT imaging. A lung phantom containing bone, soft tissue, and a tumor mimicking material was imaged with filter thicknesses range [0–1] mm and kVp range [60–140]. A cost function based on contrast-to-noise-ratio of bone, soft tissue, and tumor, as well as image noise content, was defined to optimize filter thickness and kVp. Using the optimized parameters, dual-energy images of anthropomorphic Rando phantom were acquired and evaluated for bone subtraction. Imaging dose was measured with dual-energy technique using tin filtering. Results: Tin was the material of choice providing the best energy separation, non-toxicity, and non-reactiveness. The best soft-tissue-only image in the lung phantom was obtained using 0.3 mm tin and [140, 80] kVp pair. Dual-energy images of the Rando phantom had noticeable bone elimination when compared to no filtration. Dose was lower with tin filtering compared to no filtration. Conclusions: Dual-energy soft-tissue imaging is feasible using ExacTrac stereoscopic imaging system utilizing a single tin filter for both high and low energies and optimized acquisition parameters.

Sci-Thur AM: YIS – 07: Optimizing dual-energy x-ray parameters using a single filter for both high and low-energy images to enhance soft-tissue imaging

Energy Technology Data Exchange (ETDEWEB)

Bowman, Wesley; Sattarivand, Mike [Department of Radiation Oncology, Dalhousie University at Nova Scotia Health Authority, Department of Radiation Oncology, Dalhousie University at Nova Scotia Health Authority (Canada)

2016-08-15

Objective: To optimize dual-energy parameters of ExacTrac stereoscopic x-ray imaging system for lung SBRT patients Methods: Simulated spectra and a lung phantom were used to optimize filter material, thickness, kVps, and weighting factors to obtain bone subtracted dual-energy images. Spektr simulations were used to identify material in the atomic number (Z) range [3–83] based on a metric defined to separate spectrums of high and low energies. Both energies used the same filter due to time constraints of image acquisition in lung SBRT imaging. A lung phantom containing bone, soft tissue, and a tumor mimicking material was imaged with filter thicknesses range [0–1] mm and kVp range [60–140]. A cost function based on contrast-to-noise-ratio of bone, soft tissue, and tumor, as well as image noise content, was defined to optimize filter thickness and kVp. Using the optimized parameters, dual-energy images of anthropomorphic Rando phantom were acquired and evaluated for bone subtraction. Imaging dose was measured with dual-energy technique using tin filtering. Results: Tin was the material of choice providing the best energy separation, non-toxicity, and non-reactiveness. The best soft-tissue-only image in the lung phantom was obtained using 0.3 mm tin and [140, 80] kVp pair. Dual-energy images of the Rando phantom had noticeable bone elimination when compared to no filtration. Dose was lower with tin filtering compared to no filtration. Conclusions: Dual-energy soft-tissue imaging is feasible using ExacTrac stereoscopic imaging system utilizing a single tin filter for both high and low energies and optimized acquisition parameters.

Dermatologic radiotherapy and thyroid cancer. Dose measurements and risk quantification

International Nuclear Information System (INIS)

Goldschmidt, H.; Gorson, R.O.; Lassen, M.

1983-01-01

Thyroid doses for various dermatologic radiation techniques were measured with thermoluminescent dosimeters and ionization rate meters in an Alderson-Rando anthropomorphic phantom. The effects of changes in radiation quality and of the use or nonuse of treatment cones and thyroid shields were evaluated in detail. The results indicate that the potential risk of radiogenic thyroid cancer is very small when proper radiation protection measures are used. The probability of radiogenic thyroid cancer developing and the potential mortality risk were assessed quantitatively for each measurement. The quantification of radiation risks allows comparisons with risks of other therapeutic modalities and the common hazards of daily life

Digital image manipulation of underexposed X-rays - examinations with a fluorescent light scanner

International Nuclear Information System (INIS)

Hidajat, N.; Schroeder, R.J.; Bergh, B.; Cordes, M.; Felix, R.

1994-01-01

Incorrect exposure of conventional radiographs frequently leads to repetition of the examination and thereby to increased radiation exposure for the patient. Underexposed films of an Alderson-Rando phantom, an ankle joint and a patella were digitised by means of an inexpensive fluorescent light scanner, and subsequent image manipulation improved quality so as to make the image diagnostically adequate. For the demonstration of markedly underexposed structures digitalisation with subsequent contrast enhancement was used. Well exposed structures are best evaluated in contrast enhanced transmitted light. Our results suggest it should be possible to reduce the number of repeat exposures and thereby to limit radiation exposure. (orig.) [de

Survey of dose distribution in patients due to operation of CT machines

International Nuclear Information System (INIS)

Su, Ling-Nah; Hsu, Pin-Chieh; Weng, Pao-Shan.

1985-01-01

This paper deals with dose measurement in gonad and eyes with self-fabricated thermoluminescent dosimeters during CT scanning for brain. A female Rando phantom was used as the reference. The experimental results obtained from several patients show that for brain scan, the average eye dose was 169.5 ± 204.1 mrad/slice and gonad dose 0.20 ± 0.15 mrad/slice for male, and that for female was 195.3 ± 193.2 mrad/slice for eyes and 0.04 ± 0.03 mrad/slice for gonad. The results are also compared with that obtained from other models of CT scanner. (author)

Space and time resolved measurements of ion temperature with the CVI 5292 A charge exchange recombination line after subtracting background radiation

International Nuclear Information System (INIS)

Ida, K.; Hidekuma, S.

1988-08-01

An ion temperature profile has been obtained with the CVI 5292 A (n = 8 - 7) charge exchange recombination (CXR) line using a space and wave-length resolving visible spectrometer installed on the JIPP TII-U tokamak. Two sets of 50 channels optical fiber arrays: one viewing a fast neutral hydrogen beam (CXR channels) and the other viewing off the neutral beam line (background channels), is arranged on the entrance slit of the spectrometer. This spectrometer is coupled to an image intensifier and CCD detector at the focal plane and provides temperature profile every 1/60 second. An ion temperature is derived from the Doppler broadened line profile after subtracting the simultaneously measured cold component (background channels), which is due to electron-excitation and/or charge exchange recombination in the plasma periphery. Alternative approach to obtain the ion temperature profile without CXR is also demonstrated. This method is based on an Abel inversion technique for each wavelength separately. (author)

An algorithm to remove fringe jumps and its application to microwave reflectometry

International Nuclear Information System (INIS)

Ejiri, A.; Kawahata, K.; Shinohara, K.

1997-01-01

In some plasma discharges, the phase measured by microwave reflectometry has many fringe (2π radians) jumps. A new algorithm to detect and remove fringe jumps has been developed, and applied to the data in the JIPP TII-U tokamak. Using this algorithm, quantitative properties of fringe jumps, and their effects on the analysis of phase fluctuations are investigated. It was found that the occurrence of fringe jumps obeys a Poisson process, and the time scale of jumps is distributed over a wide range. Fringe jumps affect mainly the low-frequency components of phase fluctuations. Comparison of the phase corrected by the algorithm and the phase calculated from the time smoothed signals indicates that time smoothing (or frequency filtering) is an effective way to obtain information concerning the macroscopic density profile. Fringe jump and phase runaway can be phenomenologically explained by the distribution of the complex amplitude of the reflected wave. (author)

Evaluation of dose exposure in 64-slice CT colonography

Energy Technology Data Exchange (ETDEWEB)

Luz, O.; Trabold, T.; Kopp, A.F.; Claussen, C.D.; Heuschmid, M. [University Hospital Tuebingen, Department of Diagnostic Radiology, Tuebingen (Germany); Buchgeister, M.; Klabunde, M. [University of Tuebingen, Institute of Medical Physics, Tuebingen (Germany)

2007-10-15

The radiation exposure of four different 64-slice MDCT-colonography (CTC) protocols was evaluated using an Alderson-Rando phantom. Protocols using 30 mAs (collimation 20 x 1.2mm), 50 mAs (collimation 20 x 1.2 and 64 x 0.6mm) and 80 mAs (20 x 1.2 mm) representing screening low-dose, routine, narrow collimation and oncologic staging setups were measured with an Alderson-Rando phantom (Alderson Research Laboratories Inc.). Scans were performed on a 64-row MDCT (SOMATOM Sensation 64, Siemens) simulating the prone and supine positions with a constant voltage of 120 kV. Dose values (male/female) were 2.5/2.9, 3.8/4.2, 4.2/4.5 and 5.7/6.4 mSv for 30, 50 (20 x 1.2 and 64 x 0.6 mm) and 80 mAs, respectively. Measurements showed an elevated dose for females (11.5% mean; compared to males). Use of narrow collimation combined with 50 mAs resulted in a small increase of dose exposure of 10.5 (male) and 7.1% (female). Gonad doses ranged from 0.9 to 2.6 mSv (male) and from 1.5 to 3.5 mSv (female). In all protocols, the stomach wall, lower colon, urinary bladder and liver were slightly more highly exposed (all <2.3 mSv) than the other organs, and the breast dose was <0.3 mSv in every setup. Values of radiation exposure in 64- and 16-slice CTC differ only marginally when using the narrow collimation. In 64-slice CTC, the use of narrow (64 x 0.6 mm) collimation shows slightly elevated dose values compared to wider (20 x 1.2 mm) collimation. (orig.)

Mechanism of inhibition of HIV-1 integrase by G-tetrad-forming oligonucleotides in Vitro.

Science.gov (United States)

Jing, N; Marchand, C; Liu, J; Mitra, R; Hogan, M E; Pommier, Y

2000-07-14

The G-tetrad-forming oligonucleotides and have been identified as potent inhibitors of human immunodeficiency virus type 1 integrase (HIV-1 IN) activity (Rando, R. F., Ojwang, J., Elbaggari, A., Reyes, G. R., Tinder, R., McGrath, M. S., and Hogan, M. E. (1995) J. Biol. Chem. 270, 1754-1760; Mazumder, A., Neamati, N., Ojwang, J. O., Sunder, S., Rando, R. F., and Pommier, Y. (1996) Biochemistry 35, 13762-13771; Jing, N., and Hogan, M. E. (1998) J. Biol. Chem. 273, 34992-34999). To understand the inhibition of HIV-1 IN activity by the G-quartet inhibitors, we have designed the oligonucleotides and, composed of three and four G-quartets with stem lengths of 19 and 24 A, respectively. The fact that increasing the G-quartet stem length from 15 to 24 A kept inhibition of HIV-1 IN activity unchanged suggests that the binding interaction occurs between a GTGT loop domain of the G-quartet inhibitors and a catalytic site of HIV-1 IN, referred to as a face-to-face interaction. Docking the NMR structure of (Jing and Hogan (1998)) into the x-ray structure of the core domain of HIV-1 IN, HIV-1 IN-(51-209) (Maignan, S., Guilloteau, J.-P. , Qing, Z.-L., Clement-Mella, C., and Mikol, V. (1998) J. Mol. Biol. 282, 359-368), was performed using the GRAMM program. The statistical distributions of hydrogen bonding between HIV-1 IN and were obtained from the analyses of 1000 random docking structures. The docking results show a high probability of interaction between the GTGT loop residues of the G-quartet inhibitors and the catalytic site of HIV-1 IN, in agreement with the experimental observation.

Evaluation of dose exposure in 64-slice CT colonography

International Nuclear Information System (INIS)

Luz, O.; Trabold, T.; Kopp, A.F.; Claussen, C.D.; Heuschmid, M.; Buchgeister, M.; Klabunde, M.

2007-01-01

The radiation exposure of four different 64-slice MDCT-colonography (CTC) protocols was evaluated using an Alderson-Rando phantom. Protocols using 30 mAs (collimation 20 x 1.2mm), 50 mAs (collimation 20 x 1.2 and 64 x 0.6mm) and 80 mAs (20 x 1.2 mm) representing screening low-dose, routine, narrow collimation and oncologic staging setups were measured with an Alderson-Rando phantom (Alderson Research Laboratories Inc.). Scans were performed on a 64-row MDCT (SOMATOM Sensation 64, Siemens) simulating the prone and supine positions with a constant voltage of 120 kV. Dose values (male/female) were 2.5/2.9, 3.8/4.2, 4.2/4.5 and 5.7/6.4 mSv for 30, 50 (20 x 1.2 and 64 x 0.6 mm) and 80 mAs, respectively. Measurements showed an elevated dose for females (11.5% mean; compared to males). Use of narrow collimation combined with 50 mAs resulted in a small increase of dose exposure of 10.5 (male) and 7.1% (female). Gonad doses ranged from 0.9 to 2.6 mSv (male) and from 1.5 to 3.5 mSv (female). In all protocols, the stomach wall, lower colon, urinary bladder and liver were slightly more highly exposed (all <2.3 mSv) than the other organs, and the breast dose was <0.3 mSv in every setup. Values of radiation exposure in 64- and 16-slice CTC differ only marginally when using the narrow collimation. In 64-slice CTC, the use of narrow (64 x 0.6 mm) collimation shows slightly elevated dose values compared to wider (20 x 1.2 mm) collimation. (orig.)

Kutseharidus rahvusvahelises võrdluses = Vocational education in international comparison / Tiiu-Liisa Rummo

Index Scriptorium Estoniae

Rummo, Tiiu-Liisa

2007-01-01

Võrdluses teiste Euroopa Liidu liikmesriikidega iseloomustab Eestit madal osaluse määr kutsehariduses. EL-i 25 riigi poiste keskmine kutsekeskhariduses õppimise määr on 57%, Eestis 40%, tüdrukute osas on vastavad numbrid 54% ja 19%. Lisatud diagrammid

Fännid püstitasid Wallace'ile ja Gromitile kuju / Tiiu Laks

Index Scriptorium Estoniae

Laks, Tiiu, 1984-

2006-01-01

Kuna täispikk animafilm "Wallace ja Gromit : Libaküüliku needus" ("Wallace & Gromit : The Curse of the Were-Rabbit") võitis Oscari, otsustasid fännid filmi autori kodulinna Bristolisse kuju püstitada

Cool : karvased hipid ja sürrid hobusepead / Maris Meiesaar, Tiiu Laks

Index Scriptorium Estoniae

Meiessaar,Maris

2008-01-01

!". PÖFFi filme programmist "Crazy Cool: Põhja-Ameerika indie-filmid" - USA mängufilm "Humboldti maa" ("Humboldt Country"), režissöörid Darren Grodsky, Danny Jacobs, Kanada dokumentaalfantaasia "Minu Winnipeg" ("My Winnipeg"), režissöör Guy Maddin

Noor koreograaf Krõõt Juurak sai imel sabast kinni / Tiiu Laks

Index Scriptorium Estoniae

Laks, Tiiu, 1984-

2006-01-01

Tantsulavastusest "Once upon" Kanuti Gildi saalis. Esietendus 12. okt. Idee ja esitus Krõõt Juurak. Valminud prooviperioodide tulemusel Viinis, PAFis Prantsusmaal ja Tallinnas. Etendub 6. dets. ka Austrias Dietheater Küntslerhausis Viinis

IPO majanduslanguse ajal? See on võimalik! / Tiiu Pedaja ; interv. Villu Zirnask

Index Scriptorium Estoniae

Pedaja, Tiiu

2008-01-01

Evli Securities ettevõtete rahanduse Eesti juht põhjendab, miks IPO-sid on võimalik korraldada ka majandusliku languse ajal, investorid võtavad hästi vastu infrastruktuuriettevõtteid. Lisa: Euroopas langes IPOde arv aastaga 49%

Suurbritannia film kliima soojenemisest täna 50 riigi kinodes / Tiiu Laks

Index Scriptorium Estoniae

Laks, Tiiu, 1984-

2009-01-01

Franny Armstrongi dokumentaal-, mängu- ja animafilmi seguna vormistatud filmi "Rumaluse ajastu" ("The Age of Stupid") ülemaailmne esilinastus toimub ÜRO peaassamblee kliimakoosoleku eelõhtul. Eestlased näevad seda Von Krahli teatris

ERKI moe ülevaatus pakkus täismajale toreda õhtu / Tiiu Oga

Index Scriptorium Estoniae

Oga, Tiiu

2007-01-01

Eesti Kunstiakadeemia 13.01.2007 Salme kultuurikesksuses toimunud moeetendusest. Lavastaja Kaarel Väli, graafiline kujundus Eiko Ojala, videokunstnikud Taavi Varm ja Aleks Tenusaar koos RGB-ga, lavaline kujundus Ain Nurmela, valguskunstnik Meelis Lusmägi koos ET Valgusega. Korraldajad Jaanika Terasmaa ja Ester Kannelmäe

Change of Zonal Flow Spectra in the JIPP T-IIU Tokamak Plasmas

International Nuclear Information System (INIS)

Hamada, Y.; Watari, T.; Yamagishi, O.; Nishizawa, A.; Narihara, K.; Kawasumi, Y.; Ido, T.; Kojima, M.; Toi, K.

2007-01-01

When Ohmically heated low-density plasmas are additionally heated by higher-harmonics ion-cyclotron-range-of frequency heating, heated by neutral beam injection, or strongly gas puffed, the intensity of zonal flows in the geodesic acoustic mode frequency range in the tokamak core plasma decreases sharply and that of low-frequency zonal flow grows drastically. This is accompanied by a damping of the drift wave propagating in the electron diamagnetic drift direction, turbulence by trapped electron mode (TEM), and the increase of the mode propagating to ion diamagnetic drift direction (ITG). In the half-radius region, TEM and high-frequency zonal flows remain intense in both OH and heated phases. ITG and low-frequency zonal flows grow in heated plasmas, suggesting a strong coupling between ITG and low-frequency zonal flow

Tähtpäevakalendri kujundamisest Nõukogude Eestis aastatel 1945-1985 / Tiiu Kreegipuu

Index Scriptorium Estoniae

Kreegipuu, Tiiu, 1977-

2011-01-01

Kalendritähtpäevade ajaloolisest taustast Eestis ja Nõukogude Liidus, sarnasustest ja erinevustest. Pühade ja tähtpäevade funktsioonidest Nõukogude kalendris. Nõukogude Eesti tähtpäevakalendri analüüs

Kolm nauditavat näidet nüüdisaegsest tantsust / Tiiu Laks

Index Scriptorium Estoniae

Laks, Tiiu, 1984-

2011-01-01

12. rahvusvahelisest Augusti tantsufestivalist. Brüsselis töötava ameerika koreograafi Daniel Linehani lavastustest "Montage for Three" ja "Not About Everything". Koreograaf David Wampachi (Pariis) lavastusest "Battement". Helsingis asutatud teatritrupi Oblivia triloogia "Entertainment Island" 2. osast, autorid-esitajad Anna Krzystek, Timo Fredriksson, Annika Tudeer

Märts - teatrikuu, nädalavahetusel viis esietendust / Tiiu Laks, Andres Keil

Index Scriptorium Estoniae

Laks, Tiiu, 1984-

2008-01-01

Nädalavahetuse viiest esietendusest : Teatris NO99 William Shakespeare'i "Perikles" Tiit Ojasoo lavastuses, Endlas "Pommimäng" Joseph Helleri näitemängu "Me pommitasime New Havenit" järgi Madis Kalmeti lavastuses, Tallinna Linnateatris Jón Atli Jónassoni "Murdlainetus" Jaanus Rohumaa lavastuses, Eesti Draamateatris Enn Vetemaa-Erki Aule "Sigma TAU C705" Merle Karusoo lavastuses, Rakvere Teatris Urmas Lennuki kirjutatud ja lavastatud "Päeva lõpus"

Voldemar Panso preemia said kaksikvennad Priit ja Märt Pius / Tiiu Laks

Index Scriptorium Estoniae

Laks, Tiiu, 1984-

2010-01-01

Lavakunstikooli 25. lennu üliõpilased Priit ja Märt Pius pälvisid Voldemar Panso nimelise preemia. Terve kursuse esimene bakalaureuselavastus "Jumala Narride Vennaskond" esietendub 4. detsembril Tallinna Linnateatri Põrgulaval. Lavastas kursuse juhendaja Elmo Nüganen

VAT Teater toob külakosti Hiiumaa lastele ja noortele / Tiiu Talvist

Index Scriptorium Estoniae

Talvist, Tiiu

2009-01-01

VAT Teater esineb Hiiumaal lastelavastusega "Varblase Priidu" (autor Rudolf Herfurtner, lavastaja Mart Kampus) ja noortelavastusega "Kas sulle meeldib porno?" (autor Klas Abrahamsson, lavastaja Margo Teder)

Viinistu suvi - kultuurikolhoos laieneb veelgi / Tiiu Laks, Tõnu Kaljuste, Sirje Eelma...[jt.

Index Scriptorium Estoniae

2008-01-01

Viinistu ajaloost, kultuurist ja hümnidest. 2008. a. suvekontserte tutvustab Tõnu Kaljuste - esinevad Maarja-Liis Ilus, Koit Toome, ansambel Jäääär, Nargen festivalil esitatakse Joseph Haydni ooper "Elu kuu peal"; katlamaja teatrietendusi tutvustab Hendrik Toompere juunior - etendub tema lavastatud Boguslaw Schaefferi "Loojang", Ingomar Vihmari lavastatud Andrus Kivirähki "Keiserlik kokk" ja välilaval Mart Kivastiku "Eesti asi"; kuraator Sirje Eelma toob välja Maarit Murka, August Künnapu, Pusa ja Toomas Kuusingu teosed. Üritusi ootab Emil Urbeli ja Toivo Raidmetsa endisest külmmahutist ümberehitatud kabel

Dermatologic radiotherapy and breast cancer

International Nuclear Information System (INIS)

Goldschmidt, H.; Gorson, R.O.; Lassen, M.

1982-01-01

This study was set up to provide quantitative data to evaluate unsubstantiated claims that improper dermatologic radiation techniques may cause breast cancer. A thin mylar window ionization rate meter placed at the location of the right breast of an Alderson-RANDO anthropomorphic phantom was used to measure direct and scatter radiation reaching the female breast during radiotherapy of the facial region (as given for acne). The results indicate that scatter doses are very small; they are influenced by radiation quality and the use or nonuse of a treatment cone. Quantitative risk estimates show that the very small risk of breast cancer induction can be reduced even further by the use of proper radiation protection measures. (orig.)

Radiation doses to patients in haemodynamic procedures

International Nuclear Information System (INIS)

Canadillas-Perdomo, B.; Catalan-Acosta, A.; Hernandez-Armas, J.; Perez-Martin, C.; Armas-Trujillo, D. de

2001-01-01

Interventional radio-cardiology gives high doses to patients due to high values of fluoroscopy times and large series of radiographic images. The main objective of the present work is the determination of de dose-area product (DAP) in patients of three different types of cardiology procedures with X-rays. The effective doses were estimated trough the organ doses values measured with thermoluminescent dosimeters (TLDs-100), suitable calibrated, placed in a phantom type Rando which was submitted to the same radiological conditions corresponding to the procedures made on patients. The values for the effective doses in the procedures CAD Seldinger was 6.20 mSv on average and 1.85mSv for pacemaker implants. (author)

Exposure to radiation in whole body and skull CT examinations depending upon parameters determined by the technique of examination

International Nuclear Information System (INIS)

Fiebach, B.J.O.; Makoski, H.B.; Ewen, K.

1983-01-01

The article gives the organ doses for whole body CT examinations of the thoracic region, the upper abdomen, the mesogastric and pelvic regions as well as of the lumbar vertebral column and for CT scanning of the skull. The examinations were performed using in Alderson-Rando phantom with the whole body computer thomograph Somatom DR2 supplied by Siemens and with the skull computer tomograph Siretom 2000, also supplied by Siemens, It was found that the magnitude of radiation exposure of the patient depends not only on instrument-specific properties, but also to a very large measure on the examination parameters and techniques which can vary considerably from one clinic to another. (orig.) [de

Radiation doses to patients in haemodynamic procedures

Energy Technology Data Exchange (ETDEWEB)

Canadillas-Perdomo, B; Catalan-Acosta, A; Hernandez-Armas, J [Servicio de Fisica Medica, Hospital Universitario de Canarias, La Laguna, Tenerife (Spain); Perez-Martin, C [Servicio de Ingenieria Biomedica, Hospital Universitario de Canarias, La Laguna, Tenerife (Spain); Armas-Trujillo, D de [Servicio de Cardiologia, Hospital Universitario de Canarias, La Laguna, Tenerife (Spain)

2001-03-01

Interventional radio-cardiology gives high doses to patients due to high values of fluoroscopy times and large series of radiographic images. The main objective of the present work is the determination of de dose-area product (DAP) in patients of three different types of cardiology procedures with X-rays. The effective doses were estimated trough the organ doses values measured with thermoluminescent dosimeters (TLDs-100), suitable calibrated, placed in a phantom type Rando which was submitted to the same radiological conditions corresponding to the procedures made on patients. The values for the effective doses in the procedures CAD Seldinger was 6.20 mSv on average and 1.85mSv for pacemaker implants. (author)

Dermatologic radiotherapy and breast cancer

Energy Technology Data Exchange (ETDEWEB)

Goldschmidt, H.; Gorson, R.O.; Lassen, M.

1982-03-01

This study was set up to provide quantitative data to evaluate unsubstantiated claims that improper dermatologic radiation techniques may cause breast cancer. A thin mylar window ionization rate meter placed at the location of the right breast of an Alderson-RANDO anthropomorphic phantom was used to measure direct and scatter radiation reaching the female breast during radiotherapy of the facial region (as given for acne). The results indicate that scatter doses are very small; they are influenced by radiation quality and the use or nonuse of a treatment cone. Quantitative risk estimates show that the very small risk of breast cancer induction can be reduced even further by the use of proper radiation protection measures.

In vivo dosimetry using thermoluminescent detector in cancer therapy of head and neck

International Nuclear Information System (INIS)

Viegas, Claudio C.B.; Batista, D.V.; Campos, A.M.; Lopes, R.T.

2002-01-01

The viability and implementation of a routine in vivo dosimetry, using thermoluminescent dosemeters (TLD), at the radiotherapy section of the National Institute of Cancer in Brazil, in the case of head and neck treatment is shown. In order to reach that aim, the characteristics of the response of the LiF:Mg;Ti (TLD-100) thermoluminescent detectors in powder form were determined. The performed of this detector for in vivo dosimetry was testes using an RANDO Alderson anthropomorphic phantom and, once their adequability proved for the kind of measurements proposed , it was used for dose assessment in the case of tumour treatments in the head and neck regions, for Cobalt-60 irradiations. (author)

Uued raamatud

Index Scriptorium Estoniae

2005-01-01

Constructed happiness - domestic environment in the cold war era / Võistlevad õnned - elukeskkond külma sõja perioodil (EKA, 2005; toimetajad Mart Kalm, Ingrid Ruudi, kujundajad Martin Lazarev, Tiit Lepp, Andrus Kõresaar); Ruumipilt : Eesti parimad interjöörid ja disain : konkurss 2004 / Eesti Sisearhitektide Liit (Minuskel, 2005; projektijuht Mati Veermets, kujundaja Tiiu Prisko, tekstid: Ell-Maaja Randküla); Eesti Kunstiakadeemia ajakirja 1. number (toimetajad Karolin Kuusik, Kristina Paju, kujundajad Kadri-Maria Mitt, Tuuli Aule, fotod: Tatjana Muravskaja); Eesti Kunstiakadeemia lõputööd 2005 (EKA, 2005; koostajad Karin Laansoo, Alo Paistik, kujundajad T. Aule, K.-M. Mitt, fotograafid Pelle Kalmo, Riikka Tauriainen, Anu Vahtra); Hallas-Murula, Karin. Suurlinn Tallinn : Eliel Saarineni "Suur-Tallinna" projekt. 1913 (Eesti Arhitektuurimuuseum, 2005; kujundaja Tiit Jürna); Kivi, Raul-Levroit. Tartu planeerimisest ja arhitektuurist : artikleid ja mälestusi (Eesti Arhitektuurimuuseum, 2005; koostajad Jaan Malin, K. Hallas-Murula); Arhitektuuriaasta 2004 : arhitektuuripreemiate nominendid (Solnessi Arhitektuurikirjastus, 2005; tekst: Epp Lankots, kujundaja Arhitektuuri Domeen); Archiprix International 2005 : world's best graduation projects (Rotterdam, 2005; EKA lõpetanud arhitektidest on publitseeritud Ralf Lõokese magistritöö "Superrand")

Growth hormone treatment in 35 prepubertal children with achondroplasia

DEFF Research Database (Denmark)

Hertel, Niels Thomas; Eklöf, Ole; Ivarsson, Sten

2005-01-01

BACKGROUND: Achondroplasia is a skeletal dysplasia with extreme, disproportionate, short stature. AIM: In a 5-y growth hormone (GH) treatment study including 1 y without treatment, we investigated growth and body proportion response in 35 children with achondroplasia. METHODS: Patients were rando...... treatment of children with achondroplasia improves height during 4 y of therapy without adverse effect on trunk-leg disproportion. The short-term effect is comparable to that reported in Turner and Noonan syndrome and in idiopathic short stature.......BACKGROUND: Achondroplasia is a skeletal dysplasia with extreme, disproportionate, short stature. AIM: In a 5-y growth hormone (GH) treatment study including 1 y without treatment, we investigated growth and body proportion response in 35 children with achondroplasia. METHODS: Patients were...

Measurement of X-ray for the dose area product and spectrum by the added filtration in Rando phantom

Science.gov (United States)

Lee, Jong-Woong; Kim, Eun-Soo; Choi, Jiwon; Kweon, Dae Cheol

2014-02-01

The most important point in the medical use of radiation is to minimize the patient entrance dose while maintaining the diagnostic information. Low-energy photons (long-wave X-ray) are unnecessary among diagnostic X-ray because they are mostly absorbed and increase the patient's entrance dose. The most effective method to eliminate the low-energy photon is use of a filtering plate. Using a filter appropriate for the image will maintain diagnostic value. Obtaining an effective image allows comparison of the resulting images in a logical objective way. This experiment was performed to determine the quality of image dosimeter when there is no filter, and when 2 mm Al, 0.1 mm Cu + 1 mm Al, 0.2 mm Cu + 1 mm Al filters are used. Using TORECK PD-8100 dose area products meter placed on top of an abdominal phantom, we measured the dose when the filter changes in this condition 85 kVp, 40 mAs, anode angle 13, source image distance 100 cm, 20 cm × 20 cm. We used the SRS-78 program for accurate comparison because we could not evaluate the difference in the image optically. The spectrum changed due to the emission of X-rays as the filter changed. We observed that the use of a filter eliminated the low-energy photons and revealed continuous X-ray and special X-ray. Therefore, the experiment highlighted the advantages of filters and confirmed that there are no changes in the quality of image through signal to noise ratio, peak signal to noise ratio, root mean square error comparison. We found that the use of filter did not lead to distortions in the image or drop in diagnostic value while minimizing the radiation dose. This means that it can help manage long-term patient dose. We conclude that we need to recommend the use of the filter as it reduces the area of dose.

Loomade ja piima kokkuost, 2008 = Purchase of livestock and milk, 2008 / Tiiu Tamm

Index Scriptorium Estoniae

Tamm, Tiiu

2008-01-01

2008. aastal saadi lihatöötlemisettevõtete kokkuostetud 40 000 veisest 9492 tonni liha ja 406 800 seast 32 074 tonni liha, piimatöötlemisettevõtted ostsid 2008. aastal 614 290 tonni piima. Graafik. Tabel

Koduseinale maal oma sõrmejäljest või DNA-st / Tiiu Laks

Index Scriptorium Estoniae

Laks, Tiiu, 1984-

2006-01-01

Disainerite duo DNA11 - Adrian Salamunovic ja Nazim Ahmed teevad soovijate DNA-st või sõrmejäljest kunstiteose. Näpujälg skaneeritakse arvutisse, DNA näidis viiakse laborisse, kus selle väljavõtet pildistatakse

Large potential change induced by pellet injection in JIPP T-IIU tokamak plasmas

International Nuclear Information System (INIS)

Hamada, Y.; Sato, K.N.; Sakakita, H.

1995-05-01

A large, rapid change in the local plasma potential is found to be induced by off-axis hydrogen ice-pellet injection into a tokamak plasma. The polarity of the rapid change is reversed when the pellet is injected into the upper and lower halves of the poloidal plasma cross-section. This change can be interpreted as being due to the gradient-B drift of particles in the high-density plasmas of the pellet cloud, before the increase of the plasma density due to the ablation becomes uniform on the magnetic surface. (author)

Dirigent Anu Tali: mind pole ilma meie orkestrita / Anu Tali ; intervjueerinud Tiiu Laks

Index Scriptorium Estoniae

Tali, Anu, 1972-

2009-01-01

31. mail ja 1. juunil Estonai kontserdisaalis toimuvast Põhjamaade Sümfooniaorkestri kontserdist "Kohtumispaik Eesti", ettekandele tulevatest Erkki-Sven Tüüri teosest, solistidest David Geringas, Marko Martin

Evaluating the competitiveness of the countries in the Baltic Sea region / Tiiu Paas

Index Scriptorium Estoniae

Paas, Tiiu, 1949-

2004-01-01

Konkurentsivõime kontseptsioonist, Läänemeremaade konkurentsivõime hindamisest. Uuringu tulemusest selgus, et parim positsioon on regiooni väiksematel (Soome, Taani, Rootsi) riikidel. Üleminekumajandusega maadest on parimad võimalused Eestil. Tabelid. Diagrammid

Tallinnas esinev Šveitsi kuulus tantsutrupp näitab looma inimeses / Tiiu Laks

Index Scriptorium Estoniae

Laks, Tiiu, 1984-

2009-01-01

Oktoobri alguses esineb Tallinnas ja Tartus Šveitsi tantsukompanii Drift, kes esitab lavastuse "Au bleu cochon". Lisaks etendustele annab trupi kunstiline juht Peter Schelling Eesti tantsijatele ja koreograafidele meistriklassi

Mis võiks olla ühist Johan Laidoneril ja Ingmar Bergmanil / Tiiu Laks

Index Scriptorium Estoniae

Laks, Tiiu, 1984-

2008-01-01

Laretei, Käbi. Kuhu kadus kõik see armastus? : Ingmari kirjad Käbile / tõlge rootsi keelest Anu Saluäär. Tallinn : SE&JS, 2008 ; Laidoner, Johan. Ühtekuuluvuse teel : Johan Laidoneri kirjad abikaasale / koostanud [ja toimetanud] Irene Lään ja Toomas Hiio ; vene keelest tõlkinud Jüri Ojamaa. Tallinn : Varrak, 2008

Aldo Järvsoo: kirivööd ma ei lõigu / Tiiu Laks

Index Scriptorium Estoniae

Laks, Tiiu, 1984-

2009-01-01

Eesti 2008. aasta parim moekunstnik ja auhinna Kuldnõel omanik on Aldo Järvsoo, tema kollektsioonist "Virve". Lühidalt auhinna teiste nominentide Liisi Eesmaa, Tiina Talumehe ja Liivia Leškini kollektsioonidest. Võidukollektsiooni saab 15. märtsini vaadata Tallinna Kaubamaja Naistemaailmas paikneval näitusepinnal

[Liivi Aarma. Põhja-Eesti kogudused ja vaimulikkond 1525-1885. 2. raamat] / Tiiu Reimo

Index Scriptorium Estoniae

Reimo, Tiiu, 1953-

2009-01-01

Arvustus: Aarma, Liivi. Põhja-Eesti kogudused ja vaimulikkond 1525-1885. 2. raamat. Põhja-Eesti vaimulike lühielulood 1525-1885. Kurzbiographien der Pastoren des Konsistorialbezirks Estland 1525-1885. Herdaminne för Estland Stift: kortbiografi 1525-1885. Pastors of North Estland: short biographies 1525-1885. Tallinn, 2007

SU-F-J-62: Assessment of Dose Changes Due to Anterior-Posterior Patient Separation During Daily MVCT Scans

Energy Technology Data Exchange (ETDEWEB)

Leney, M [Wayne State University, Detroit, MI (United States); Nalichowski, A; Patel, S [Karmanos Cancer Institute, Detroit, MI (United States)

2016-06-15

Purpose: To determine the effects of patient separation on absolute dose and dose distribution in patients undergoing pelvic radiotherapy on TomoTherapy. Methods: An Alderson RANDO phantom with 4cm of bolus was imaged on a CT simulator and the resulting scans were contoured as a whole pelvic case. Using TomoTherapy Planning Station, the plan was designed to give 45 Gy to 95% of the treatment volume in 25 fractions. TomoTherapy MVCT scans were performed on the RANDO phantom with 2cm and 4cm of bolus removed to simulate visible changes in a patient’s anatomy. The MVCT images were rigidly registered with planning CT images on TomoTherapy Planned Adaptive. The original fluence was recalculated on the MVCT images and changes in dose distribution due to patient separation were quantified by the changes in DVHs for the target volume and the organs at risk. Results: Patient separation difference equivalent to 2cm and 4cm in anterior-posterior direction resulted in an increase of the PTV D50 and maximum PTV dose of 5.6%, 6.2% for 2cm and 7.7%, 10.4% for 4cm, respectively. For the 2cm change, D50 and maximum doses to organs at risk increased by 6.5%, 7.1% in the bladder, 4.9%, 4.8% in the rectum, and 5.3%, 6.6% in the bowel. For the 4cm change, D50 and maximum doses increased by 10.7%, 12.2% in the bladder, 5.9%, 6.1% in the rectum, and 7.7%, 10.1% in the bowel. Conclusion: This research indicates that, without any changes to the structures, patient separation in the anterior-posterior direction can affect the dose distribution for the PTV and organs at risk. These results can assist physicians in determining if obtaining a new CT simulation set and replanning is necessary for pelvic patients on TomoTherapy.

SU-E-T-541: Bolus Effect of Thermoplastic Masks in IMRT and VMAT Head and Neck Treatments

International Nuclear Information System (INIS)

Zhen, H; Nedzi, L; Chen, S; Jiang, S; Zhao, B

2014-01-01

Purpose: To quantitatively evaluate the bolus effect of thermoplalstic mask on patient skin dose during multi-field IMRT and VMAT treatment. Methods: The clinically approved target contours for five head and neck patients were deformably registered to an anthropomorphic Rando phantom. Two plans: Multifield IMRT plan with 7-9 beams and VMAT plan with 2-4 arcs were created for each patient following same dose constraints. 3mm skin was excluded from PTVs but not constrained during optimization. The prescription dose was 200-220 cGy/fraction. A thermoplastic head and shoulder mask was customized for the Rando phantom. Each plan was delivered to the phantom twice with and without mask. During each delivery, two rectangular strips of EBT3 films (1cm x 6.8cm) were placed across the anterior upper and lower neck near PTVs to measure the surface dose. For consistency films were positioned at same locations for same patient. A total of 8 film strips were obtained for each patient. Film dose was calibrated in the range of 0-400cGy on the day of plan delivery. For dose comparison 3 regions of interests (ROIs) of 1×1 cm 2 were selected at left, right and middle part of each film, resulting in 6 point doses at each plan delivery. Results: The films without mask show relatively uniform dose distribution while those with mask clearly show mesh pattern of mask, usually indicating an increase in skin dose. On average the increase in skin dose over all ROIs with mask was 31.9%(±14.8%) with a range of 11.4%- 58.4%. There is no statistically significant difference (p=0.44) between skin dose increase in VMAT (30.8%±15.3%) and IMRT delivery (33.0%±14.9%). Conclusion: Thermoplastic immobilization masks increase surface dose for HN patient by around 30%. The magnitude is comparable between multi-field IMRT and VMAT. Radiochromic EBT3 film serves as an effective tool to quantify bolus effect

Feasibility study of helical tomotherapy for total body or total marrow irradiation

International Nuclear Information System (INIS)

Hui, Susanta K.; Kapatoes, Jeff; Fowler, Jack; Henderson, Douglas; Olivera, Gustavo; Manon, Rafael R.; Gerbi, Bruce; Mackie, T. R.; Welsh, James S.

2005-01-01

Total body radiation (TBI) has been used for many years as a preconditioning agent before bone marrow transplantation. Many side effects still plague its use. We investigated the planning and delivery of total body irradiation (TBI) and selective total marrow irradiation (TMI) and a reduced radiation dose to sensitive structures using image-guided helical tomotherapy. To assess the feasibility of using helical tomotherapy (A) we studied variations in pitch, field width, and modulation factor on total body and total marrow helical tomotherapy treatments. We varied these parameters to provide a uniform dose along with a treatment times similar to conventional TBI (15-30 min). (B) We also investigated limited (head, chest, and pelvis) megavoltage CT (MVCT) scanning for the dimensional pretreatment setup verification rather than total body MVCT scanning to shorten the overall treatment time per treatment fraction. (C) We placed thermoluminescent detectors (TLDs) inside a Rando phantom to measure the dose at seven anatomical sites, including the lungs. A simulated TBI treatment showed homogeneous dose coverage (±10%) to the whole body. Doses to the sensitive organs were reduced by 35%-70% of the target dose. TLD measurements on Rando showed an accurate dose delivery (±7%) to the target and critical organs. In the TMI study, the dose was delivered conformally to the bone marrow only. The TBI and TMI treatment delivery time was reduced (by 50%) by increasing the field width from 2.5 to 5.0 cm in the inferior-superior direction. A limited MVCT reduced the target localization time 60% compared to whole body MVCT. MVCT image-guided helical tomotherapy offers a novel method to deliver a precise, homogeneous radiation dose to the whole body target while reducing the dose significantly to all critical organs. A judicious selection of pitch, modulation factor, and field size is required to produce a homogeneous dose distribution along with an acceptable treatment time. In

SU-G-206-05: A Comparison of Head Phantoms Used for Dose Determination in Imaging Procedures

Energy Technology Data Exchange (ETDEWEB)

Xiong, Z; Vijayan, S; Kilian-Meneghin, J; Rudin, S; Bednarek, D [Toshiba Stroke and Vascular Research Center, University at Buffalo, Buffalo, NY (United States)

2016-06-15

Purpose: To determine similarities and differences between various head phantoms that might be used for dose measurements in diagnostic imaging procedures. Methods: We chose four frequently used anthropomorphic head phantoms (SK-150, PBU-50, RS-240T and Alderson Rando), a computational patient phantom (Zubal) and the CTDI head phantom for comparison in our study. We did a CT scan of the head phantoms using the same protocol and compared their dimensions and CT numbers. The scan data was used to calculate dose values for each of the phantoms using EGSnrc Monte Carlo software. An .egsphant file was constructed to describe these phantoms using a Visual C++ program for DOSXYZnrc/EGSnrc simulation. The lens dose was calculated for a simulated CBCT scan using DOSXYZnrc/EGSnrc and the calculated doses were validated with measurements using Gafchromic film and an ionization chamber. Similar calculations and measurements were made for PA radiography to investigate the attenuation and backscatter differences between these phantoms. We used the Zubal phantom as the standard for comparison since it was developed based on a CT scan of a patient. Results: The lens dose for the Alderson Rando phantom is around 9% different than the Zubal phantom, while the lens dose for the PBU-50 phantom was about 50% higher, possibly because its skull thickness and the density of bone and soft tissue are lower than anthropometric values. The lens dose for the CTDI phantom is about 500% higher because of its totally different structure. The entrance dose profiles are similar for the five anthropomorphic phantoms, while that for the CTDI phantom was distinctly different. Conclusion: The CTDI and PBU-50 head phantoms have substantially larger lens dose estimates in CBCT. The other four head phantoms have similar entrance dose with backscatter hence should be preferred for dose measurement in imaging procedures of the head. Partial support from NIH Grant R01-EB002873 and Toshiba Medical Systems

Human geography in the French Institute: new discipline or missed opportunity?

Science.gov (United States)

Staum, M S

1987-10-01

The geography section of the Class of Moral and Political Sciences of the French National Institute, which was in existence from December 1795 to January 1803, responded inadequately to the theoretical challenges of Montesquieu, the hygienists, Volney, and Degérando to study thoroughly native peoples to determine the effects of physical geographic conditions on the body and mind. Most geographers had no interest in human geography, and even statistical geography received only superficial discussion. Despite the emergence of the scientific journal, only a few authors partly transcended the stereotypes of the noble-ignoble savage. The only expedition partly planned by the Institute in this period had an ambitious exploration program that precluded a linguistically sophisticated study of native peoples. Bonaparte's dissolution of the Class hindered further opportunities for studying human geography during the Empire.

Investigation of a new LiF TLD individual dosimeter for measuring personal dose equivalent Hp(d) on different phantoms

International Nuclear Information System (INIS)

Jin Hua

1993-01-01

The paper describes the design of a new LiF TL dosimeter optimized for measuring personal dose equivalent, H p (d). The results obtained with four types of different phantoms, i.e. a PMMA slab, water slab, ICRU sphere and Alderson Rando phantom, and pertinent conversion coefficients show, that the conversion coefficients for the TE slab phantom are suitable for the calibration of TLD individual dosimeters on a PMMA slab phantom. In the energy range 17 keV to 1250 keV the energy response for H 0 (10) and H p (0.07) is within-20% to 8.4% for frontal irradiation. For angles within +- 60 degree the dosimeters indicate H p (10) within 0 to 22.5%, and H p (0.07) within-11.1% to 1.3%. respectively

Marrow, ovary, and breast doses delivered by CHR diagnostic x-ray examinations: an update

International Nuclear Information System (INIS)

Schlenker, R.A.; Oltman, B.G.

1977-01-01

The mean absorbed dose averaged over the marrow volume in a RANDO phantom is 232 +- 14 mrad and 175 +- 26 mrad when the ANL examination is made using 1 mm Al and 3 mm Al added filtration, respectively; it is 606 +- 69 mrad when the MIT examination is made. The absorbed dose averaged over the ovaries is 243 +- 25 mrad and 162 +- 38 mrad for 1 mm Al and 3 mm Al at ANL and 606 +- 40 mrad for the MIT examination. Breast doses are 388 +- 35 mrad, 226 +- 9 mrad, and 333 +- 103 mrad. Dose reduction could be achieved by using a faster film-screen combination for the MIT examination, by routinely using 3 mm Al added filtration at ANL and by improving the collimation at ANL

Mirror confinement systems: Final technical report

International Nuclear Information System (INIS)

1988-08-01

This report contains: (1) A discussion of azimuthal asymmetrics and fluctuations in RFC-XX-M. Both lead to enhanced radial transport in RFC-XX-M, and presumably most other tandem mirror machines as well; A report on four operating modes of RFC-XX-M which were developed and studied as part of the collaboration. These operating modes were the simple tandem mode, the negative (floating) potential mode, the hot electron mode, and the ECH (electron cyclotron heating) mode; A pulsed rf heated discharge cleaning system which was developed for RFC-XX-M. This method of cleaning proved much more effective than normal glow discharge cleaning, and variations of it are currently in use on the GAMMA-10 tandem mirror and the JIPP TII-U tokamak at the Institute for Plasma Physics at Nagoya; Short descriptions of the diagnostics development and improvement done in conjunction with the work on RFC-XX-M; and a compilation of the work performed at the University of Tsukuba on GAMMA-10. Most of the effort on GAMMA-10 involved diagnostics development and improvement. 16 refs., 42 figs., 1 tab

In memoriam 2003

Index Scriptorium Estoniae

2004-01-01

Maailmas: Lynn Chadwick (24. XI 1914-25. IV), Eila Hiltunen (22. XI 1922-10. X), Leni Riefenstahl (22. VIII 1902-8. IX); Eesti: Paul Allik (23. XII 1946-14. XII), Tiiu Aru (14. X 1938-4. XII), Olga Bruns (19. III 1929-21. XII), Paula Delacherie-Ilves (7. IV 1903-2. IX), Tamara Ditman (9. VIII 1945-4. VIII), Ole Ehelaid (1. V 1913-2. IX), Mart-Ivo Eller (24. VII 1936-18. XI), Ene Falkenberg (2. XI 1914-10. III), Valve Janov (31. I 1921-18. IX), Aino Järvesoo (23. IX 1910-2. II), Lea Jürisson (31. X 1927-30. VIII), Ella Külv (1. XI 1921-31. VII), Tõnis Liik (1. XI 1923-25. I), Ella Loodma (27. II 1926-9. VI), Külli Muna (17. I 1960-8. I), Maire Männik (1. IV 1922-5. IX), Aleksei Paivel (30. III 1929-15. IX), Aino Põldra (1. VIII 1923-5. III), Made Põlluaas (13. VI 1929-15. X), Aleksander Suuman (25. IV 1927-19. VI), Walter Zapp (4. IX 1905-17. VII), Andres Tambek (7. VII 1952-12. V), Isi Trapido (27. IX 1921-28. XI), Ants Erik Vomm (4. VI 1931-11. VIII)

Alguses oli Arvo Pärdi muusika ja siis tulid Jalakas ja videokunstnikud / Tiiu Laks

Index Scriptorium Estoniae

Laks, Tiiu, 1984-

2010-01-01

Tõnu Kaljuste ja Peeter Jalaka lavastusest "Alguses oli", lavastuse aluseks Arvo Pärdi teosed "In Principio" ja "Miserere", 17. augustil Noblesse valukojas toimunud etendusest, muusikaline juht Tõnu Kaljuste

EU eastward enlargement and the Baltic Sea region role in trade integration / Tiiu Paas

Index Scriptorium Estoniae

Paas, Tiiu, 1949-

2003-01-01

Läänemeremaade osast Baltimaade integratsioonis rahvusvahelisse kaubandusse. El-is on kaubavoogude elastsus peaaegu kaks korda suurem kui riikidel väljaspool seda, kusjuures see kehtib võrdselt nii ekspordi kui impordi kohta. Tabelid

Eesti Draamateater tähistas maja 100. sünnipäeva / Tiiu Laks

Index Scriptorium Estoniae

Laks, Tiiu, 1984-

2010-01-01

18. septembril tähistati avatud uste päevaga Eesti Draamateater hoone 100. sünnipäeva. Õhtul sai teatrihoone fassaadilt vaadata Taavet Janseni, Taavi Varmi ja Andres Tenusaare videoinstallatsiooni. Esitleti raamatut "Eesti Draamateatri maja 100" (autorid Karin Hallas-Murula, Kristel Pappel, Haldja Jalajas). Avati Peeter Lauritsa fotonäitus "Pahempidi"

Aineüleste pädevuste koolitus Pestalozzi programmi raames / Tiia Pukk, Tiiu Vaher

Index Scriptorium Estoniae

Pukk, Tiia

2011-01-01

1969 alguse saanud Pestalozzi koolitusprogramm on suunatud Euroopa kultuurikonventsiooniga ühinenud 49 riigi haridustöötajatele. Seekordne üritus toimus Tartus, koolituse teemaks aineülesed pädevused

Rein Pakk: olen Jumala trumm, aga sina oled ka / Rein Pakk ; intervjueerinud Tiiu Laks

Index Scriptorium Estoniae

Pakk, Rein, 1968-

2010-01-01

Intervjuu Rein Pakuga, kellel meeldib kirjutada artikleid ja näidendeid, laval ja filmis mängida, teha sisekujunduslahendusi ja karikatuure. 27. augustil esietendus Tallinna Draamateatris tema esimene lavastajatöö, teatri Vanemuine lavastus "Kaos". Andmeid Rein Paku elu ja loomingu kohta

Jaak Prints: näitleja hirmud on üldinimlikud / Jaak Prints ; intervjueerinud Tiiu Laks

Index Scriptorium Estoniae

Prints, Jaak, 1981-

2010-01-01

Teatri NO99 näitleja Jaak Prints endast, näitlejaks olemisest, mõistest "mõtlev teater", koduteatrist, NO99 aktsioonist "Ühtne Eesti suurkogu", lavastamise soovist jm. Loetletud Jaak Printsi rollid ja tööd lavastajana

Elu, lugu ja uurimine : metoodilisi vaatepunkte lähiminevikust jutustavate lugude uurimises / Tiiu Jaago

Index Scriptorium Estoniae

Jaago, Tiiu, 1960-

2011-01-01

Tutvustus: Eda Kalmre. Hirm ja võõraviha sõjajärgses Tartus : pärimuslooline uurimus kannibalistlikest kuulujuttudest. Tartu : Eesti Kirjandusmuuseumi Teaduskirjastus, 2007. (Tänapäeva folkloorist ; 7) ; Ene Kõresaar. Elu ideoloogiad : kollektiivne mälu ja autobiograafiline minevikutõlgendus eestlaste elulugudes. Tartu : Eesti Rahva Muuseum, 2005. (Eesti Rahva Muuseumi sari ; 6)

Organ doses from computerized tomography examinations

Energy Technology Data Exchange (ETDEWEB)

Janeczek, J.

1995-12-31

Estimates of mean organs doses from five typical computerized tomography (CT) examinations were obtained. Measurements were done using Rando-Alderson anthropomorphic phantom and thermoluminescent dosemeters (TLD). Radiation dose distributions within a phantom has been measured for each examination and results were used for organ dose calculation. Doses to organs specified by ICPR 60 Recommendations were measured for five CT scanners (CT/T8800, CT 9800, CT MAX - made by General Electric; CT 1200 SX - made by Picker; SOMATOM 2 - made by Siemens). Dose distributions from scattered radiation were measured and indicate that scattered radiation dose to thyroid and eye lens can be reduced by proper examination limits setting. The lowest mean organ doses were obtained from CT/T8800 scanner. More advanced scanners using high intensity continuous radiation were giving higher organ doses. (author). 23 refs, 6 figs, 13 tabs.

Comparison of radiation delivered by current diagnostic procedures for herniated disc

International Nuclear Information System (INIS)

Gasquet, C.; Drouineau, J.; Goubault, F.; Hurmic, A.; Lavigne, B.; Vandermarcq, P.

1983-01-01

Three methods are currently employed for the diagnosis of sciatica due to disc lesions: radiculography, spinal phlebography, and computed tomography. Though their indications vary according to the author, it seemed worthwhile to compare radiation delivered by each of them, because of the often young age of the patients. Dosimetric studies using a Rando Phantom enabled calculation of doses to the skin, spinal cord, and gonads. Results indicated that low doses were delivered by the scanner, relatively high doses by spinal phlebography, and intermediate doses by radiculography. These findings suggest that the initial examination preoperatively in cases of simple sciatica due to herniated disc should be a CT scan whenever possible. Phlebography, on the contrary, and particularly in young women, should be used only exceptionally, as a result of the high doses delivered to the ovaries even during technically simple explorations [fr

Stereotactic radiosurgery using a linear accelerator

Energy Technology Data Exchange (ETDEWEB)

Kyuma, Yoshikazu; Hayashi, Akimune; Kitamura, Tatsuo; Yamashita, Koosuke; Muranishi, Hisayuki; Hioki, Minoru [Kanagawa Cancer Center, Yokohama (Japan)

1992-07-01

A basic and clinical study of radiosurgery using the linear accelerator (Linac) system for unremovable deep-seated brain tumors is reported. A Komai stereotactic ring was used to locate the target coordinates. The patient was laid on the Linac treatment table and held in the head fixation system. Irradiation was given in five positions. The dose profile by film dosimetry and Rando phantom was satisfactory. Seventeen tumors in 14 patients were treated. Clinical or histological diagnoses were nine metastases, one benign and two malignant gliomas, one meningioma, and one carcinopharyngioma. Tumor sizes were between 8 and 30 mm. Doses were between 12 and 30 Gy. Computed tomographic evaluation after 3 months of 12 tumors in 11 survivors showed one complete remission, three partial remission, six no change, and two partial deterioration. For progressive tumors, Linac radiosurgery results are excellent. (author).

Organ doses from computerized tomography examinations

International Nuclear Information System (INIS)

Janeczek, J.

1995-01-01

Estimates of mean organs doses from five typical computerized tomography (CT) examinations were obtained. Measurements were done using Rando-Alderson anthropomorphic phantom and thermoluminescent dosemeters (TLD). Radiation dose distributions within a phantom has been measured for each examination and results were used for organ dose calculation. Doses to organs specified by ICPR 60 Recommendations were measured for five CT scanners (CT/T8800, CT 9800, CT MAX - made by General Electric; CT 1200 SX - made by Picker; SOMATOM 2 - made by Siemens). Dose distributions from scattered radiation were measured and indicate that scattered radiation dose to thyroid and eye lens can be reduced by proper examination limits setting. The lowest mean organ doses were obtained from CT/T8800 scanner. More advanced scanners using high intensity continuous radiation were giving higher organ doses. (author). 23 refs, 6 figs, 13 tabs

Neutron response study

International Nuclear Information System (INIS)

Endres, G.W.R.; Fix, J.J.; Thorson, M.R.; Nichols, L.L.

1981-01-01

Neutron response of the albedo type dosimeter is strongly dependent on the energy of the incident neutrons as well as the moderating material on the backside of the dosimeter. This study characterizes the response of the Hanford dosimeter for a variety of neutron energies for both a water and Rando phantom (a simulated human body consisting of an actual human skeleton with plastic for body muscles and certain organs). The Hanford dosimeter response to neutrons of different energies is typical of albedo type dosimeters. An approximate two orders of magnitude difference in response is observed between neutron energies of 100 keV and 10 MeV. Methods were described to compensate for the difference in dosimeter response between a laboratory neutron spectrum and the different spectra encountered at various facilities in the field. Generally, substantial field support is necessary for accurate neutron dosimetry

Secreted microvesicular miR-31 inhibits osteogenic differentiation of mesenchymal stem cells

DEFF Research Database (Denmark)

Weilner, Sylvia; Schraml, Elisabeth; Wieser, Matthias

2016-01-01

Damage to cells and tissues is one of the driving forces of aging and age-related diseases. Various repair systems are in place to counteract this functional decline. In particular, the property of adult stem cells to self-renew and differentiate is essential for tissue homeostasis and regeneration....... However, their functionality declines with age (Rando, 2006). One organ that is notably affected by the reduced differentiation capacity of stem cells with age is the skeleton. Here, we found that circulating microvesicles impact on the osteogenic differentiation capacity of mesenchymal stem cells....... As a potential source of its secretion, we identified senescent endothelial cells, which are known to increase during aging in vivo (Erusalimsky, 2009). Endothelial miR-31 is secreted within senescent cell-derived microvesicles and taken up by mesenchymal stem cells where it inhibits osteogenic differentiation...

MOSFET detectors in quality assurance of tomotherapy treatments.

Science.gov (United States)

Cherpak, Amanda; Studinski, Ryan C N; Cygler, Joanna E

2008-02-01

The purpose of this work was to characterize metal oxide semiconductor field-effect transistors (MOSFETs) in a 6 MV conventional linac and investigate their use for quality assurance of radiotherapy treatments with a tomotherapy Hi-Art unit. High sensitivity and standard sensitivity MOSFETs were first calibrated and then tested for reproducibility, field size dependence, and accuracy of measuring surface dose in a 6 MV beam as well as in a tomotherapy Hi-Art unit. In vivo measurements were performed on both a RANDO phantom and several head and neck cancer patients treated with tomotherapy and compared to TLD measurements and treatment plan doses to evaluate the performance of MOSFETs in a high gradient radiation field. The average calibration factor found was 0.345+/-2.5%cGy/mV for the high sensitivity MOSFETs tested and 0.901+/-2.4%cGy/mV for the standard sensitivity MOSFETs. MOSFET measured surface doses had an average agreement with ion chamber measurements of 1.55% for the high sensitivity MOSFET and 5.23% for the standard sensitivity MOSFET when averaged over all trials and field sizes tested. No significant dependence on field size was found for the standard sensitivity MOSFETs, however a maximum difference of 5.34% was found for the high sensitivity MOSFET calibration factors in the field sizes tested. Measurements made with MOSFETS on head and neck patients treated on a tomotherapy Hi-Art unit had an average agreement of (3.26+/-0.03)% with TLD measurements, however the average of the absolute difference between the MOSFET measurements and the treatment plan skin doses was (12.2+/-7.5)%. The MOSFET measured patient skin doses also had good reproducibility, with inter-fraction deviations ranging from 1.4% to 6.6%. Similar results were found from trials using a RANDO phantom. The MOSFETs performed well when used in the tomotherapy Hi-Art unit and did not increase the overall treatment set-up time when used for patient measurements. It was found that MOSFETs

A modification to the Gill-Thomas-Cosman (GTC) head frame for stereotactic radiosurgery of head and neck and cervical spine sites

International Nuclear Information System (INIS)

Qian, G.; Hasala, P.; Rashid, H.; Costantino, T.; Cangiane, L.; Lombardi, E.; Arbit, E; Lederman, G.

1996-01-01

PURPOSE/OBJECTIVE: Fractionated Stereotactic Radiosurgery (FSR) is used primarily to treat intracranial lesions. Many tumors which arise at or inferior to the base of skull and about the cervical spine area were not amenable to radiosurgery. Presented is a modification to the GTC head frame which permits stereotactic radiosurgery to be directed at head and neck tumors with accurate reproducible precision. MATERIALS AND METHODS: The original GTC head frame has two fixation points; an anterior individualized dental impression and a posterior occipital plate with a mold contoured to the occipital pertuberance. The height of the occipital plate is adjustable in its vertical plane. However, the position of the dental piece is fixed and, therefore, limits treatment to regions superior. Treatment of head and neck and cervical spine tumors has been accomplished with a modification of the dental apparatus. Presented is our new device; a bracket extension which attaches to the dental piece and allows the head frame to be lowered to multiple desired positions. The occipital plate is elevated accordingly to support the occipital pertuberance. The depth helmet is also modified for quality assurance. A Rando phantom was used to test the accuracy and reproducibility of the new equipment. Bracket extensions lowering the head frame by 3 cm and 8 cm, respectively, were tested for accuracy of relocation on the Rando Phantom. Each extension was tested 20 times and for each individual test 18 depth helmet positions were obtained. RESULTS: The standard deviation of the modified head frame for each depth helmet measurement ranged from 0.05 to 0.35mm (mean 0.20) as compared to the standard deviation for the original GTC head frame which was 0.13 to 0.34mm (mean 0.24). The new device maintains the accuracy and reproducibility of the original GTC head frame. CONCLUSION: The GTC relocatable head frame for FSR has been modified to treat tumors of the head and neck and cervical spine sites

Dosimetry of patients submitted to cerebral PET/CT for the diagnosis of mild cognitive impairment

Energy Technology Data Exchange (ETDEWEB)

Santana, Priscila do Carmo; Oliveira, Paulo Marcio Campos de; Bernardes, Felipe Dias; Mamede, Marcelo, E-mail: pridili@gmail.com [Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, MG (Brazil); Mourao, Arnaldo Prata [Centro Federal de Educacao Tecnologica de Minas Gerais (CEFET), Belo Horizonte, MG (Brazil); Silva, Teogenes Augusto da [Centro de Desenvolvimento da Tecnologia Nuclear (CDTN/CNEN-MG), Belo Horizonte, MG (Brazil)

2014-11-15

Objective: the present study was aimed at evaluating the effective radiation dose in patients submitted to PET/CT for the diagnosis of mild cognitive impairment. Materials and methods: TLD-100 detectors inserted into an Alderson Rando® anthropomorphic phantom were utilized to measure the absorbed dose coming from the CT imaging modality. The anthropomorphic phantoms (male and female adult versions) were submitted to the same technical protocols for patients’ images acquisition. The absorbed dose resulting from the radiopharmaceutical injection was estimated by means of the model proposed by the ICRP publication 106. Results: the effective dose in patients submitted to this diagnostic technique was approximately (5.34 ± 1.99) mSv. Conclusion: optimized protocols for calculation of radioactive activity injected into patients submitted to this diagnostic technique might contribute to reduce the effective radiation dose resulting from PET/CT in the diagnosis of mild cognitive impairment. (author)

Dosimetry of patients submitted to cerebral PET/CT for the diagnosis of mild cognitive impairment

International Nuclear Information System (INIS)

Santana, Priscila do Carmo; Oliveira, Paulo Marcio Campos de; Bernardes, Felipe Dias; Mamede, Marcelo; Mourao, Arnaldo Prata; Silva, Teogenes Augusto da

2014-01-01

Objective: the present study was aimed at evaluating the effective radiation dose in patients submitted to PET/CT for the diagnosis of mild cognitive impairment. Materials and methods: TLD-100 detectors inserted into an Alderson Rando® anthropomorphic phantom were utilized to measure the absorbed dose coming from the CT imaging modality. The anthropomorphic phantoms (male and female adult versions) were submitted to the same technical protocols for patients’ images acquisition. The absorbed dose resulting from the radiopharmaceutical injection was estimated by means of the model proposed by the ICRP publication 106. Results: the effective dose in patients submitted to this diagnostic technique was approximately (5.34 ± 1.99) mSv. Conclusion: optimized protocols for calculation of radioactive activity injected into patients submitted to this diagnostic technique might contribute to reduce the effective radiation dose resulting from PET/CT in the diagnosis of mild cognitive impairment. (author)

Evaluation of the usefulness of a MOSFET detector in an anthropomorphic phantom for 6-MV photon beam.

Science.gov (United States)

Kohno, Ryosuke; Hirano, Eriko; Kitou, Satoshi; Goka, Tomonori; Matsubara, Kana; Kameoka, Satoru; Matsuura, Taeko; Ariji, Takaki; Nishio, Teiji; Kawashima, Mitsuhiko; Ogino, Takashi

2010-07-01

In order to evaluate the usefulness of a metal oxide-silicon field-effect transistor (MOSFET) detector as a in vivo dosimeter, we performed in vivo dosimetry using the MOSFET detector with an anthropomorphic phantom. We used the RANDO phantom as an anthropomorphic phantom, and dose measurements were carried out in the abdominal, thoracic, and head and neck regions for simple square field sizes of 10 x 10, 5 x 5, and 3 x 3 cm(2) with a 6-MV photon beam. The dose measured by the MOSFET detector was verified by the dose calculations of the superposition (SP) algorithm in the XiO radiotherapy treatment-planning system. In most cases, the measured doses agreed with the results of the SP algorithm within +/-3%. Our results demonstrated the utility of the MOSFET detector for in vivo dosimetry even in the presence of clinical tissue inhomogeneities.

Scattered radiation risk to the lens of the eyes for staff involved in using mobile C-arm fluoroscopy unit: Which position is riskiest?

Energy Technology Data Exchange (ETDEWEB)

Salleh, H.; Matori, M. K.; Isa, M. J. M. [Agensi Nuklear Malaysia, Bangi, 43000 Kajang, Selangor (Malaysia); Samat, S. B. [Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor (Malaysia)

2015-09-25

Cataractogenesis is something to be concerned by radiologist and radiographer who work extensively in fluoroscopy. The increasing use of fluoroscopy or interventional fluoroscopy has to come with safety awareness on scattered radiation risk for staff performing the procedure. This study is looking into the radiation risk to the lens of the eyes for staff involved in fluoroscopy using the mobile C-arm fluoroscopy unit. The Toshiba SXT-1000A and Alderson Rando phantom were used in this study. Based on the results, it is found clearly that over couch (OC) procedure is riskier than under couch (UC) procedure. The cathode bound area is clearly riskier than anode bound area especially for UC procedure. More doses (at least +1,568 % of safest position) are received by the lens of the eyes for staff standing at the cathode bound area especially the position opposite to the x-ray tube.

Scattered radiation risk to the lens of the eyes for staff involved in using mobile C-arm fluoroscopy unit: Which position is riskiest?

International Nuclear Information System (INIS)

Salleh, H.; Matori, M. K.; Isa, M. J. M.; Samat, S. B.

2015-01-01

Cataractogenesis is something to be concerned by radiologist and radiographer who work extensively in fluoroscopy. The increasing use of fluoroscopy or interventional fluoroscopy has to come with safety awareness on scattered radiation risk for staff performing the procedure. This study is looking into the radiation risk to the lens of the eyes for staff involved in fluoroscopy using the mobile C-arm fluoroscopy unit. The Toshiba SXT-1000A and Alderson Rando phantom were used in this study. Based on the results, it is found clearly that over couch (OC) procedure is riskier than under couch (UC) procedure. The cathode bound area is clearly riskier than anode bound area especially for UC procedure. More doses (at least +1,568 % of safest position) are received by the lens of the eyes for staff standing at the cathode bound area especially the position opposite to the x-ray tube

A Topographically and anatomically unified phantom model for organ dose determination in radiation hygiene

International Nuclear Information System (INIS)

Servomaa, A.; Rannikko, S.; Ermakov, I.; Masarskyi, L.; Saltukova, L.

1989-08-01

The effective dose equivalent is used as a risk-related factor for assessing radiation impact on patients. In order to assess the effective dose equivalent, data on organ doses in several organs are needed. For calculation of the collective effective dose equivalent, data on the sex and size distribution of the exposed population are also needed. A realistic phantom model based on the Alderson-Rando anatomical phantom has been developed for these purposes. The phantom model includes 22 organs and takes into account the deflections due to sex, height, weight and other anatomical features. Coordinates of the outer contours of inner organs are given in different slabs of the phantom. The images of cross sections of different slabs realistically depict the distribution of the organs in the phantom. Statistics about height and weight distribution as a function of the age of the Finnish population are also given. (orig.)

Uni = elu / Lea Noormets ; kommenteerinud Jean-François Bouvet, Marlit Veldi, Tiiu Väinsaar

Index Scriptorium Estoniae

Noormets, Lea

2012-01-01

Und mõjutavatest teguritest ja unehäirete, s.h ajavahestressi leevendamisest ning ravist homöopaatia, toiduravi, taimravi e fütoteraapia, energeetilise meditsiini või valgusteraapiaga. Artikkel tugineb Gerard Pacaud' raamatule Le Sommeil, c'est vital

Raivo Tafenau: olen võetud väärikasse seltskonda / Raivo Tafenau ; intervjueerinud Tiiu Laks

Index Scriptorium Estoniae

Tafenau, Raivo, 1963-

2010-01-01

Vestlus Jazzkaare raames 28. aprillil toimunud Eesti džässiauhindade väljaandmisel Eesti džässiauhinna pälvinud saksofonistiga. Noore džässitalendi auhind anti Peedu Kassile, džässiedendaja auhind Boris Paršinile

Prokurör nägi inimliku jõhkruse piiritust / Hinge Brand ; interv. Tiiu Põld

Index Scriptorium Estoniae

Brand, Hinge, 1940-2007

2006-01-01

Intervjuu ametist lahkuva prokurör Hinge Brandiga. Lisatud: Hinge Brandi CV; Hinge Brandi osavõtul peetud kõmulisemad mõrvaprotsessid. Kommenteerivad Aivar Pilv, Elmar Vaher, Alar Kirs, Eda Murak, Dilaila Nahkur-Tammiksaar

Õigeksmõistev otsus vallandas publiku tormilise aplausi / Tiiu Põld ; kommenteerinud David Vseviov ; Marju Lauristin

Index Scriptorium Estoniae

Põld, Tiiu, 1945-

2009-01-01

Harju maakohtu õigeksmõistvast otsusest aprillirahutuste korraldamises süüdistatavate Dmitri Linteri, Maksim Reva, Dimitri Klenski ja Mark Sirõki kohta. Kommenteerivad David Vseviov ja Marju Lauristin

Elutervik ja aeg : murdkem püramiidi võim / Sigmund Kvaloy ; tõlk. Tiiu Speek

Index Scriptorium Estoniae

Kvaloy, Sigmund

2005-01-01

Nüüdisaegsest ökofilosoofiast, tööstusliku kasvu ühiskonna ja eluliste vajaduste ühiskonna vastuoludest ning Norra ökopoliitikast. Lisatud lühiülevaade autori elukäigust. Vt. ka: David Rothenberg. Elutervik ja elulised vajadused: Eesti tee. Lk. 549

Elutervik ja aeg : murdkem püramiidi võim / Sigmund Kvaloy ; tõlk. Tiiu Speek

Index Scriptorium Estoniae

Kvaloy, Sigmund

2005-01-01

Nüüdisaegsest ökofilosoofiast, tööstusliku kasvu ühiskonna ja eluliste vajaduste ühiskonna vastuoludest ning Norra ökopoliitikast. Lisatud lühiülevaade autori elukäigust. Vt. ka: David Rothenberg. Elutervik ja elulised vajadused: Eesti tee

Kristiina Nurk: ilus võib olla, aga mugav peab olema / Kristiina Nurk ; intervjueerinud Tiiu Laks

Index Scriptorium Estoniae

Nurk, Kristiina, 1982-

2009-01-01

Intervjuu Kristiina Nurgaga, kes õpib Eesti Kunstiakadeemias disaini ja rakenduskunsti eriala nahakunsti suuna magistrantuuris, on lõpetanud Tartu Kõrgema Kunstikooli reklaamikunsti eriala, soovib saada kingadisaineriks, pälvis Prantsusmaal Saint Rémy-lès-Chevreuse'is toimunud rahvusvahelisel köitekunsti biennaalil ühe peapreemiatest. Kristiina Nurga eluloolisi andmeid, pälvitud preemiad

Püstised hobused : [luuletused] / Sándor Kányádi ; tlk. Tiiu Kokla, Arvo Valton

Index Scriptorium Estoniae

Kányádi, Sándor

2004-01-01

Sisu: Püstised hobused ; Purjus Agamemnon ; Kiviaeg ; Puust puuni ; Kuulutaja ingel ; In memoriam Domokos Szil{u00E1gyi ; In memoriam L. Sz. ; Ja isegi surmatunnil ; Maja ees terve öö ; Pühendus ; Kivitrükk ; Värsskroonika ; Seejärel ; Suurel neljapäeval ; Eemaldudes ; Justkui vaid nali ; Keegi kõnnib puude ladvus ; Sel õhtul ; Ei taha sulle haiget teha ; XC psalm ; Pilliroog ; Hobused ; Panta rhei ; Siis tõuseb lendu ; Sest senikaua kestab ; Jutuke ; Pärast esimest hoopi ; Ükskord ; Prometheus ; Õnneseen ; Ilustusteta laul ; On maid ; Jumala selja taga ; Võiksin öelda ; Võim ; Ajalootund. Eluloolisi andmeid autori kohta lk. 333-334

Verification of an effective dose equivalent model for neutrons

International Nuclear Information System (INIS)

Tanner, J.E.; Piper, R.K.; Leonowich, J.A.; Faust, L.G.

1992-01-01

Since the effective dose equivalent, based on the weighted sum of organ dose equivalents, is not a directly measurable quantity, it must be estimated with the assistance of computer modelling techniques and a knowledge of the incident radiation field. Although extreme accuracy is not necessary for radiation protection purposes, a few well chosen measurements are required to confirm the theoretical models. Neutron doses and dose equivalents were measured in a RANDO phantom at specific locations using thermoluminescence dosemeters, etched track dosemeters, and a 1.27 cm (1/2 in) tissue-equivalent proportional counter. The phantom was exposed to a bare and a D 2 O-moderated 252 Cf neutron source at the Pacific Northwest Laboratory's Low Scatter Facility. The Monte Carlo code MCNP with the MIRD-V mathematical phantom was used to model the human body and to calculate the organ doses and dose equivalents. The experimental methods are described and the results of the measurements are compared with the calculations. (author)

An instrument to perform automated quality assurance and patient dosimetry in diagnostic radiology

International Nuclear Information System (INIS)

Chapple, C.-L.; Faulkner, K.

1992-01-01

A computerised method of automatically monitoring tube and generator parameters to perform on-line quality assurance and patient dosimetry has been developed. A microcomputer has been interfaced to a microprocessor controlled X ray generator and dose-area product meter. The instrument prompts the operator to enter details of the examination and projection before an examination is made. The field size and dose-area product are monitored by the instrument. These data, together with information on the tube potential are used to deduce the patient entrance dose and energy imparted. Organ doses are estimated using normalised organ dose data. The accuracy and reproducibility of the instrument were investigated. Doses measured in a Rando phantom were compared with calculations made by the instrument. The instrument will compare various measured quality assurance parameters against their nominal values. The implications of this instrument for both patient dosimetry studies and effective continuous quality assurance are discussed. (author)

Dosimetric evaluation program for dental radiology practices

International Nuclear Information System (INIS)

Gregori, B.; Milat, J.; Fernandez, J.; Micinquevich, S.; Andrieu, J.

1992-01-01

The preliminary results of a program undertaken to estimate the doses to patients associated with dental radiology practices in Argentine, are presented. Information collected from the search demonstrated that the Dieck and coronal techniques are the most commonly used practices, while all the examinations are performed by using a circular collimator. For both practices, the dosimetric studies were carried out on a Rando Alderson phantom. All dose measurements were made using thermoluminescent detectors LiF and Ca 2 F. In addition, a mathematical model was developed by applying the Monte Carlo method to a MIRD-V phantom. Circular and rectangular collimators were used. Absorbed dose distribution on head and neck, as well as surface dose distribution, were estimated. The comparison of the performance of both collimators shows that the use of the rectangular one allows for a dose reduction of 80%. Besides, a good correlation between the physical and mathematical models applied was found. (author)

Patient radiation doses from neuroradiology procedures

Energy Technology Data Exchange (ETDEWEB)

Garcia-Roman, M J; Abreu-Luis, J; Hernandez-Armas, J [Servicio de Fisica Medica, Hospital Universitario de Canarias, La Laguna, Tenerife (Spain); Prada-Martinez, E [Servicio de Radiodiagnostico, Hospital Universitario de Canarias, La Laguna, Tenerife (Spain)

2001-03-01

Following the presentation of radiation-induced deterministic effects by some patients undergoing neuroradiological procedures during successive sessions, such as temporary epilation, in the 'Hospital Universitario de Canarias', measurements were made of dose to patients. The maximum dose-area product measured by ionization chamber during these procedures was 39617 cGy.cm{sup 2} in a diagnostic of aneurysm and the maximum dose to the skin measured by thermoluminescent dosemeters (TLDs) was 462.53 mGy. This can justify certain deterministic effects but it is unlikely that the patients will suffer serious effects from this skin dose. Also, measurements were made of effective dose about two usual procedures, embolisation of tumour und embolisation of aneurysm. These procedures were reproduced with an anthropomorphic phantom Rando and doses were measured with TLDs. Effective doses obtained were 3.79 mSv and 4.11 mSv, respectively. The effective dose valued by the program EFFDOSE was less than values measured with TLDs. (author)

Development of modified voxel phantoms for the numerical dosimetric reconstruction of radiological accidents involving external sources: implementation in SESAME tool.

Science.gov (United States)

Courageot, Estelle; Sayah, Rima; Huet, Christelle

2010-05-07

Estimating the dose distribution in a victim's body is a relevant indicator in assessing biological damage from exposure in the event of a radiological accident caused by an external source. When the dose distribution is evaluated with a numerical anthropomorphic model, the posture and morphology of the victim have to be reproduced as realistically as possible. Several years ago, IRSN developed a specific software application, called the simulation of external source accident with medical images (SESAME), for the dosimetric reconstruction of radiological accidents by numerical simulation. This tool combines voxel geometry and the MCNP(X) Monte Carlo computer code for radiation-material interaction. This note presents a new functionality in this software that enables the modelling of a victim's posture and morphology based on non-uniform rational B-spline (NURBS) surfaces. The procedure for constructing the modified voxel phantoms is described, along with a numerical validation of this new functionality using a voxel phantom of the RANDO tissue-equivalent physical model.

NOTE: Development of modified voxel phantoms for the numerical dosimetric reconstruction of radiological accidents involving external sources: implementation in SESAME tool

Science.gov (United States)

Courageot, Estelle; Sayah, Rima; Huet, Christelle

2010-05-01

Estimating the dose distribution in a victim's body is a relevant indicator in assessing biological damage from exposure in the event of a radiological accident caused by an external source. When the dose distribution is evaluated with a numerical anthropomorphic model, the posture and morphology of the victim have to be reproduced as realistically as possible. Several years ago, IRSN developed a specific software application, called the simulation of external source accident with medical images (SESAME), for the dosimetric reconstruction of radiological accidents by numerical simulation. This tool combines voxel geometry and the MCNP(X) Monte Carlo computer code for radiation-material interaction. This note presents a new functionality in this software that enables the modelling of a victim's posture and morphology based on non-uniform rational B-spline (NURBS) surfaces. The procedure for constructing the modified voxel phantoms is described, along with a numerical validation of this new functionality using a voxel phantom of the RANDO tissue-equivalent physical model.

Measurement of radiation dose to ovaries from CT of the head and trunk

Energy Technology Data Exchange (ETDEWEB)

Al-Habdhan, M.A.M.; Kinsara, A.R. [King Abdul Aziz Univ., Nuclear Engineering Dept., Jeddah (Saudi Arabia)

2001-07-01

With the rise in concern about doses received by patients over recent years, there has been a growing requirement for information on typical doses and the range of dose received during Computerized Tomography (CT). This study was performed for the assessment of radiation dose to the ovaries from various CT protocols for head and trunk imaging. Thermo luminescent dosimeters (TLD) were used for the dosimetry measurement in an anthropomorphic Rando Alderson phantom. The wanted (obligatory) and unwanted (non-useful) radiation doses delivered to the ovaries during CT examinations of head, facial bone, orbits, abdomen, chest, pelvis, neck, nasopharynx, cervical spine, lumber spine and sacroiliac joint were assessed. The results are compared with the corresponding values published in the literature. A comparison of the received dose from CT examinations and general radiography examinations by the ovaries was made. It is found that relatively high doses of unwanted radiation are delivered with computerized tomography. (author)

Investigation of a new LiF TLD individual dosimeter for measuring personal dose equivalent Hp(d) on different phantoms

International Nuclear Information System (INIS)

Jin, H.; Duftschmid, K.E.; Strachotinsky, C.

1992-09-01

The paper describes a new LiF TLD dosimeter designed for measuring personal dose equivalent, H p (d). Its energy and angular response have been studied in detail on a PMMA slab phantom using the conversion factors for TE slab phantom. According to the results obtained with four types of different conversion coefficients and phantoms, i.e. a PMMA slab, Water slab, ICRU sphere and Alderson Rando phantom, the conversion coefficients for the TE slab phantom are suitable for the calibration of TLD individual dosimeters on PMMA slab phantom. In the energy range 17 keV to 1250 KeV the energy response for H p (10) and H p (0.07) is energy independent within -20% to 8.4% for frontal irradiation. For angles within ±60 deg the new TLD dosimeters indicate H p (10) within 0 to 22.5% and H p (0.07) within -11.1% to 1.3%, respectively. (authors)

Determination of Entrance Skin Doses and Organ Doses for Medical X Ray Examinations

International Nuclear Information System (INIS)

Tung, C.J.; Cheng, C.Y.; Chao, T.C.; Tsai, H.Y.

1999-01-01

A national survey of patient doses for diagnostic X ray radiographs is planned in Taiwan. Entrance skin doses and organ doses for all installed X ray machines will be investigated. A pilot study has been carried out for the national survey to develop a protocol for the dose assessment. Entrance skin doses and organ doses were measured by thermoluminescence dosemeters and calculated by Monte Carlo simulations for several X ray examinations. The conversion factor from free air entrance absorbed dose to entrance skin dose was derived. A formula for the computation of entrance skin doses from inputs of kV p , mA.s, source to skin distance, aluminium filtration, and generator rectifying was constructed. Organ doses were measured using a RANDO phantom and calculated using a mathematical phantom. All data will be passed to the Atomic Energy Council for developing a programme of national survey and regulatory controls for diagnostic X ray examinations. (author)

Optimization and objective and subjective analysis of thorax image for computerized radiology

International Nuclear Information System (INIS)

Velo, Alexandre F.; Miranda, Jose Ricardo A.

2013-01-01

This research aimed at optimizing computational chest radiographic images (in previous posterior projection-PA). To this end, we used a homogeneous patient equivalent phantom in Computational Imaging System calibration, in order to obtain a satisfactory noise signal relation for a diagnosis, adjusting to a minimum dose received by the patient. The techniques have been applied in an anthropomorphic phantom (RANDO). The images obtained were evaluated by a radiologist, which identified the best image to determine possible pathologies (fracture or pneumonia). The technique were quantified objectively (Detective Quantum Efficiency - DQE, Modulation Transfer Function MTF, Noise Power Spectrum, NPS). Comparing optimized techniques with the clinical routine, it is concluded that all provide doses below reference levels. However the choice of the best technique for viewing possible pneumonia and/or fracture, was determined based on the first 3D (Dose, Diagnostic, Dollar) and regarded as gold standard. This image presented a reduction of dose and loading of tube around 70.5% and 80% respectively when compared with the clinical routine

Is energy imparted a good measure of the radiation risk associated with CT examinations

International Nuclear Information System (INIS)

Huda, W.

1984-01-01

The dose distribution in a Rando phantom has been measured for typical EMI 5005 CT scans of the head, chest, abdomen and pelvis. These dose distributions have been used to generate quantitative estimates of the somatic and genetic radiation risks associated with these CT examinations and also to measure the total energy imparted during each scan. A comparison has been made between the radiation risk estimates and the energy imparted measurements. The energy imparted measurements are not a good indicator of the somatic and/or genetic risks when one type of CT scan is compared with another. However, for a given type of scan, the energy imparted may be a reasonable indicator of the relative somatic risks associated with different CT examinations. Considerable care should be taken when interpreting and using any measured value of energy imparted in a radiological examination since published values of the risk per unit energy imparted can significantly underestimate the radiation risk. (author)

Assessment of effective radiation dose of an extremity CBCT, MSCT and conventional X ray for knee area using MOSFET dosemeters.

Science.gov (United States)

Koivisto, Juha; Kiljunen, Timo; Wolff, Jan; Kortesniemi, Mika

2013-12-01

The objective of this study was to assess and compare the organ and effective doses in the knee area resulting from different commercially available multislice computed tomography devices (MSCT), one cone beam computed tomography device (CBCT) and one conventional X-ray radiography device using MOSFET dosemeters and an anthropomorphic RANDO knee phantom. Measurements of the MSCT devices resulted in effective doses ranging between 27 and 48 µSv. The CBCT measurements resulted in an effective dose of 12.6 µSv. The effective doses attained using the conventional radiography device were 1.8 µSv for lateral and 1.2 µSv for anterior-posterior projections. The effective dose resulting from conventional radiography was considerably lower than those recorded for the CBCT and MSCT devices. The MSCT effective dose results were two to four times higher than those measured on the CBCT device. This study demonstrates that CBCT can be regarded as a potential low-dose 3D imaging technique for knee examinations.

Craniospinal axis irradiation: an improved electron technique for irradiation of the spinal axis

International Nuclear Information System (INIS)

Chun Li; Vijayakumar, S.; Myrianthopoulos, L.C.; Kuchnir, F.T.; Muller-Runkel, R.

1994-01-01

The authors review dosimetric features of craniospinal axis irradiation in the areas of matching cranial and spinal fields, with reference to normal structures within the spinal field. The implications of the use of photon or electron modalities for the spinal port were evaluated. A novel method of matching the cranial photon and the spinal electron fields involving a computer-aided junction design is presented, involving moving the photon beam in three steps to degrade its penumbra to match that of the electron field. Thermoluminescent dosimetry in a Rando phantom and computed tomography-based dose-volume histogram study for an illustrative paediatric case were used to compare dose to normal structures within the spinal field. Results show that the use of electrons for the spinal field leads to better sparing of deep seated normal structures. For bone marrow, the use of a customized bolus for the spinal field results in an improved dose distribution, making electrons potentially superior to photons for radiobiological reasons. (author)

An algorithm to biological tissues evaluation in pediatric examinations

International Nuclear Information System (INIS)

Souza, R.T.F.; Miranda, J.R.A.; Alvarez, M.; Velo, A.F.; Pina, D.R.

2011-01-01

A prerequisite for the construction of phantoms is the quantification of the average thickness of biological tissues and the equivalence of these simulators in simulator material thicknesses. This study aim to develop an algorithm to classify and quantify tissues, based on normal distribution of CT numbers of anatomical structures found in the mean free path of the X-rays beam, using the examination histogram to carry out this evaluation. We have considered an algorithm for the determination of the equivalent biological tissues thickness from histograms. This algorithm classifies different biological tissues from tomographic exams in DICOM format and calculates the average thickness of these tissues. The founded results had revealed coherent with literature, presenting discrepancies of up to 21,6%, relative to bone tissue, analyzed for anthropomorphic phantom (RANDO). These results allow using this methodology in livings tissues, for the construction of thorax homogeneous phantoms, of just born and suckling patients, who will be used later in the optimization process of pediatrics radiographic images. (author)

Dose Evaluation and Quality Criteria in Dental Radiology

International Nuclear Information System (INIS)

Gori, C.; Rossi, F.; Stecco, A.; Villari, N.; Zatelli, G.

2000-01-01

Radioprotection in dental radiology is of particular interest in the framework of the Revised Medical Exposure Directive for the great number of examinations involving the adult as well as the paediatric population (Article 9: Special Practice). The present study is intended to find the quality criteria of orthodontic imaging and for evaluating the dose absorbed within the dental and maxillary volume in connection with radiological examinations performed with either spiral CT, dental panoramic tomography or teleradiography. The X ray dose to organs sited in the body, neck, ocular and intracranial area was measured using lithium fluoride dosemeters, positioned in a Rando phantom. Quality criteria have been established by an expert radiologist considering the diagnostic information obtained in the images. The dosimetric data obtained were comparable with other authors', although with some differences due to technical characteristics. These result data are useful for choosing the patient's diagnostic path, considering the radiobiological risk associated with increasing orthodontic imaging. (author)

Patient radiation doses from neuroradiology procedures

International Nuclear Information System (INIS)

Garcia-Roman, M.J.; Abreu-Luis, J.; Hernandez-Armas, J.; Prada-Martinez, E.

2001-01-01

Following the presentation of radiation-induced deterministic effects by some patients undergoing neuroradiological procedures during successive sessions, such as temporary epilation, in the 'Hospital Universitario de Canarias', measurements were made of dose to patients. The maximum dose-area product measured by ionization chamber during these procedures was 39617 cGy.cm 2 in a diagnostic of aneurysm and the maximum dose to the skin measured by thermoluminescent dosemeters (TLDs) was 462.53 mGy. This can justify certain deterministic effects but it is unlikely that the patients will suffer serious effects from this skin dose. Also, measurements were made of effective dose about two usual procedures, embolisation of tumour und embolisation of aneurysm. These procedures were reproduced with an anthropomorphic phantom Rando and doses were measured with TLDs. Effective doses obtained were 3.79 mSv and 4.11 mSv, respectively. The effective dose valued by the program EFFDOSE was less than values measured with TLDs. (author)

Grand Prix' võitis reklaamfilmistuudio Division / Mait Laas, Jaak Lõhmus, Ants Vist...[jt.] ; interv. Tiiu Leis

Index Scriptorium Estoniae

1998-01-01

Pärnu filmipäevadel 'Do Re Vi' võitis Grand Prix ehk skulptuuri 'Oskar & Ella' reklaamistuudio 'Division', kullatud videokassetid said 'Polarfilm' (dok. film), Martin Pedanik (video) ja Edith Sepp ('Tingimustega Tallinnas'); osalejate M. Laasi, J. Lõhmuse, A. Visti ja I. Raagi kommentaare ürituse kohta;

Mäed, puud, rohukõrred : [luuletused] / Domokos Szil{u00E1gyi ; tlk. Tiiu Kokla

Index Scriptorium Estoniae

Szil{u00E1gyi, Domokos

2004-01-01

Sisu: Mäed, puud, rohukõrred ; Väiksed armuhümnid ; Nõid ; Katke kinni vanaisa ; Pööripäev ; Avaldus ; Kelles iseoma südametunnistusele koputad ; Süüdistus ; Tee nii, et armastaksin ; Circumdederunt ; Hädamaandumine. Eluloolisi andmeid autori kohta lk. 297-298

Social consequences of transition : who recognize themselves to be poor in Estonia? / Tiiu Paas, Andres Võrk

Index Scriptorium Estoniae

Paas, Tiiu, 1949-

2003-01-01

Analüüs, kuidas on omavahel seotud leibkonna sissetulekuga määratud vaesus ja inimeste enda poolt antud hinnang oma majanduslikule olukorrale. Kasutatud on ESA Leibkonna Eelarve Uuringu andmeid aastatest 2000 ja 2001. Tabelid

Saa võimust : [luuletused] / J{u00E1nos Pilinszky ; tlk. Tiiu Kokla, Kairi Mesipuu

Index Scriptorium Estoniae

Pilinszky, J{u00E1nos

2004-01-01

Sisu: Saa võimust ; Trapets ja tõke ; Talvise taeva all ; Ühe kire marginaaliks ; Harbach 1944 ; Armastuse kõrb ; Apokrüüf ; Nelik ; Järelsõna ; Introitus ; Van Gogh ; Väike öömuusika ; Timuka päevikust ; Madalseisu pidu ; Pole muud ; Ravensbrücki passioon ; Van Goghi palve ; Kadunud poja otsimine ; Su käsi, mu käsi ; Salamõrv ; Luuletus ; Peks ; 22. detsember 1970 ; Visand ; Kolmandal päeval ; Kadunud pojad ; Lõpetamata minevik. Eluloolisi andmeid autori kohta lk. 181-182

Eesti kultuurielu sovetiseerimine : Nõukogude kultuuripoliitika eesmärgid ja institutsionaalne raamistik aastatel 1944-1954 / Tiiu Kreegipuu

Index Scriptorium Estoniae

Kreegipuu, Tiiu

2007-01-01

Ka vaimse kultuuri vallas kehtestati valdkondade hierarhia. Esikohale seati kirjandus. Kogu kultuuri kirjeldamisel valitses vulgaarsotsioloogiline meetod. Välise surve tagajärjel hakkas süvenema kõige tõhusam tsensuuriliik - enesetsensuur. Teistest kunstiküsimustest eraldati institutsiooniliselt arhitektuuriasjad

Shielding for Critical Organs and Radiation Exposure Dose Distribution in Patients with High Energy Radiotherapy

International Nuclear Information System (INIS)

Chu, Sung Sil; Suh, Chang Ok; Kim, Gwi Eon

2002-01-01

High energy photon beams from medical linear accelerators produce large scattered radiation by various components of the treatment head, collimator and walls or objects in the treatment room including the patient. These scattered radiation do not provide therapeutic dose and are considered a hazard from the radiation safety perspective. Scattered dose of therapeutic high energy radiation beams are contributed significant unwanted dose to the patient. ICRP take the position that a dose of 500mGy may cause abortion at any stage of pregnancy and that radiation detriment to the fetus includes risk of mental retardation with a possible threshold in the dose response relationship around 100 mGy for the gestational period. The ICRP principle of As Low As Reasonably Achievable (ALARA) was recommended for protection of occupation upon the linear no-threshold dose response hypothesis for cancer induction. We suggest this ALARA principle be applied to the fetus and testicle in therapeutic treatment. Radiation dose outside a photon treatment filed is mostly due to scattered photons . This scattered dose is a function of the distance from the beam edge, treatment geometry, primary photon energy, and depth in the patient. The need for effective shielding of the fetus and testicle is reinforced when young patients are treated with external beam radiation therapy and then shielding designed to reduce the scattered photon dose to normal organs have to considered. Irradiation was performed in phantom using high energy photon beams produced by a Varian 2100C/D medical linear accelerator (Varian Oncology Systems, Polo Alto, CA) located at the Yonsei Cancer Center. The composite phantom used was comprised of a commercially available anthropomorphic Rando phantom (Phantom Laboratory Inc., Salem, YN) and a rectangular solid polystyrene phantom of dimensions 30cm x 30cm x 20cm. The anthropomorphic Rando phantom represents an average man made from tissue equivalent materials that is

Shielding for Critical Organs and Radiation Exposure Dose Distribution in Patients with High Energy Radiotherapy

Energy Technology Data Exchange (ETDEWEB)

Chu, Sung Sil; Suh, Chang Ok; Kim, Gwi Eon [Yonsei Univ., Seoul (Korea, Republic of)

2002-03-15

High energy photon beams from medical linear accelerators produce large scattered radiation by various components of the treatment head, collimator and walls or objects in the treatment room including the patient. These scattered radiation do not provide therapeutic dose and are considered a hazard from the radiation safety perspective. Scattered dose of therapeutic high energy radiation beams are contributed significant unwanted dose to the patient. ICRP take the position that a dose of 500mGy may cause abortion at any stage of pregnancy and that radiation detriment to the fetus includes risk of mental retardation with a possible threshold in the dose response relationship around 100 mGy for the gestational period. The ICRP principle of As Low As Reasonably Achievable (ALARA) was recommended for protection of occupation upon the linear no-threshold dose response hypothesis for cancer induction. We suggest this ALARA principle be applied to the fetus and testicle in therapeutic treatment. Radiation dose outside a photon treatment filed is mostly due to scattered photons . This scattered dose is a function of the distance from the beam edge, treatment geometry, primary photon energy, and depth in the patient. The need for effective shielding of the fetus and testicle is reinforced when young patients are treated with external beam radiation therapy and then shielding designed to reduce the scattered photon dose to normal organs have to considered. Irradiation was performed in phantom using high energy photon beams produced by a Varian 2100C/D medical linear accelerator (Varian Oncology Systems, Polo Alto, CA) located at the Yonsei Cancer Center. The composite phantom used was comprised of a commercially available anthropomorphic Rando phantom (Phantom Laboratory Inc., Salem, YN) and a rectangular solid polystyrene phantom of dimensions 30cm x 30cm x 20cm. The anthropomorphic Rando phantom represents an average man made from tissue equivalent materials that is

Development of an imaging VUV monochromator in normal incidence region

Energy Technology Data Exchange (ETDEWEB)

Koog, Joong-San

1996-07-01

This paper describes a development of the two-dimensional imaging monochromator system. A commercial normal incidence monochromator working on off-Rowland circle mounting is used for this purpose. The imaging is achieved with utilizing the pinhole camera effect created by an entrance slit of limited height. The astigmatism in the normal incidence mounting is small compared with a grazing incidence mount, but has a finite value. The point is that for near normal incidence, the vertical focusing with a concave grating is produced at outside across the exit slit. Therefore, by putting a 2-D detector at the position away from the exit slit ({approx}30 cm), a one-to-one correspondence between the position of a point on the detector and where it originated in the source is accomplished. This paper consists of (1) the principle and development of the imaging monochromator using the off-Rowland mounting, including the 2-D detector system, (2) a computer simulation by ray tracing for investigations of the imaging properties of imaging system, and aberration from the spherical concave grating on the exit slit, (3) the plasma light source (TPD-S) for the test experiments, (4) Performances of the imaging monochromator system on the spatial resolution and sensitivity, and (5) the use of this system for diagnostic studies on the JIPP T-IIU tokamak. (J.P.N.)

Development of an imaging VUV monochromator in normal incidence region

International Nuclear Information System (INIS)

Koog, Joong-San.

1996-07-01

This paper describes a development of the two-dimensional imaging monochromator system. A commercial normal incidence monochromator working on off-Rowland circle mounting is used for this purpose. The imaging is achieved with utilizing the pinhole camera effect created by an entrance slit of limited height. The astigmatism in the normal incidence mounting is small compared with a grazing incidence mount, but has a finite value. The point is that for near normal incidence, the vertical focusing with a concave grating is produced at outside across the exit slit. Therefore, by putting a 2-D detector at the position away from the exit slit (∼30 cm), a one-to-one correspondence between the position of a point on the detector and where it originated in the source is accomplished. This paper consists of 1) the principle and development of the imaging monochromator using the off-Rowland mounting, including the 2-D detector system, 2) a computer simulation by ray tracing for investigations of the imaging properties of imaging system, and aberration from the spherical concave grating on the exit slit, 3) the plasma light source (TPD-S) for the test experiments, 4) Performances of the imaging monochromator system on the spatial resolution and sensitivity, and 5) the use of this system for diagnostic studies on the JIPP T-IIU tokamak. (J.P.N.)

Determination of isodose curves in Radiotherapy using an Alanine/ESR dosemeter

International Nuclear Information System (INIS)

Chen, F.; Baffa, O.; Graeff, C.F.O.

1998-01-01

It was studied the possible use of an Alanine/ESR dosemeter in the isodose curves mapping in normal treatments of Radiotherapy. It was manufactured a lot of 150 dosemeters with base in a mixture of D-L Alanine dust (80 %) and paraffin (20 %). Each dosemeter has 4.7 mm diameter and 12 mm length. A group of 100 dosemeters of the lot were arranged inside 50 holes of the slice 25 of the phantom Rando Man. The phantom irradiation was realized in two opposed projections (AP and PA) in Co-60 equipment. A group of 15 dosemeters was take of the same lot for obtaining the calibration curve in a 1-20 Gy range. After irradiation the signal of each dosemeter was measured in an ESR spectrometer operating in the X-band (∼ 9.5 GHz) and the wideness of Alanine ESR spectra central line was correlated with the radiation dose. The wideness dose calibration curve resulted linear with a correlation coefficient 0.9996. The isodose curves obtained show a profile enough similar at comparing with the theoretical curves. (Author)

Verification of an effective dose equivalent model for neutrons

International Nuclear Information System (INIS)

Tanner, J.E.; Piper, R.K.; Leonowich, J.A.; Faust, L.G.

1991-10-01

Since the effective dose equivalent, based on the weighted sum of organ dose equivalents, is not a directly measurable quantity, it must be estimated with the assistance of computer modeling techniques and a knowledge of the radiation field. Although extreme accuracy is not necessary for radiation protection purposes, a few well-chosen measurements are required to confirm the theoretical models. Neutron measurements were performed in a RANDO phantom using thermoluminescent dosemeters, track etch dosemeters, and a 1/2-in. (1.27-cm) tissue equivalent proportional counter in order to estimate neutron doses and dose equivalents within the phantom at specific locations. The phantom was exposed to bare and D 2 O-moderated 252 Cf neutrons at the Pacific Northwest Laboratory's Low Scatter Facility. The Monte Carlo code MCNP with the MIRD-V mathematical phantom was used to model the human body and calculate organ doses and dose equivalents. The experimental methods are described and the results of the measurements are compared to the calculations. 8 refs., 3 figs., 3 tabs

Estimation of absorbed and effective dose in {sup 18}F-FDG em PET- CT exams for diagnosis of lung cancer; Estimativa de dose absorvida e efetiva em exames de {sup 18}F-FDG em PET- CT para diagnostico de cancer de pulmao

Energy Technology Data Exchange (ETDEWEB)

Carvalho, Guilherme Neto de Pinho; Santana, Priscila do Carmo, E-mail: guinpc1@ufmg.br [Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, MG (Brazil). Departamento de Anatomia e Imagem; Oliveira, Paulo Marcio Campos de; Reis, Lucas Paixao dos [Centro de Desenvolvimento da Tecnologia Nuclear (CDTN/CNEN-MG), Belo Horizonte, MG (Brazil)

2015-04-15

This paper presents an evaluation of tissues and organs absorbed doses as well as the effective dose resulting from PET-CT scans performed with {sup 18}F-FDG radiopharmaceutical for lung cancer diagnosis in whole body scans. The ICRP-106 biokinetic model was used to estimate the absorbed and effective doses from the radiopharmaceutical for both male and female patient according to the characteristics of anthropomorphic Alderson Rando® simulators. Computer Tomography doses were evaluated using thermoluminescent detectors inserted in the same anthropomorphic simulators. Optimization protocols for image acquisition and the use of automatic exposure control were used in order to reduce patient doses, taking into account the equipment model and its system. The effective dose in female patients was 5.8 mSv. The effective dose in male patients was 8.4 mSv. The dose values estimated for the {sup 18}F-FDG PET-CT scan are below the values described in the literature. This is because the CT was not used for diagnostic but for morphological mapping. (author)

Hair {sup 32}P measurement for body dose mapping in non-fatal exposures to fast neutrons

Energy Technology Data Exchange (ETDEWEB)

Mianji, Fereidoun A. [Nuclear Science and Technology Research Institute, Tehran (Iran, Islamic Republic of); Iran Nuclear Regulatory Authority, Tehran (Iran, Islamic Republic of); Jafari, Sheyda; Zaryouni, Saiedeh [Bu-Ali Sina University, Faculty of Science, Hamedan (Iran, Islamic Republic of); Hajizadeh, Bardia [Iran Nuclear Regulatory Authority, Tehran (Iran, Islamic Republic of)

2015-03-15

Dosimetry bioassay methods are the backbone of a personal dosimetry in criticality accidents. Although methods like hair dosimetry and the use of activation foils (e.g., {sup 32}S) have been employed for decades, capabilities of different techniques, effects of hair type and neutron spectrum on the dose response, sensitivity and uncertainties of different techniques, etc., need more investigations. For this reason, the use of the {sup 32}S(n,p){sup 32}P reaction and hair samples for estimating non-fatal doses from fast neutrons was studied. The experiments were carried out with the hair samples attached on a RANDO phantom in a Cf-252 neutron field, in the dose range of about 0.05-1.15 Gy. In addition, the adequate post-accident preparation for hair samples including optimum conditioning and timing were investigated. Experimental results prove the good sensitivity and merit of the method for neutron quantification in the mentioned dose range for which other bioassay methods are of poor resolution and sensitivity. A rough estimation of the dose-response curve for Iranian hair was also derived. (orig.)

Estimation of population doses from diagnostic medical examinations in Japan, 1974. II. Estimation of genetically significant dose

Energy Technology Data Exchange (ETDEWEB)

Hashizume, T; Maruyama, T; Kumamoto, Y [National Inst. of Radiological Sciences, Chiba (Japan)

1976-03-01

The genetically significant dose from radiographic and fluoroscopic examination in Japan has been estimated based on a 1974 nation wide survey of randomly sampled hospitals and clinics. The gonad dose during x-ray diagnosis was determined with an ionization chamber placed at the positions of ovary and testis in a Rando phantom. The instrumented phantom was irradiated with medical diagnostic x-rays on the basis of the exposure data on the patients selected in the nation wide survey. In the calculation of the genetically significant dose, the child expectancy of the patients that undergo each particular type of examination was assumed to be same as that of the general population. The resultant genetically significant dose was 11.1 and 5.43 mrad per person per year for radiography and fluoroscopy, respectively. These values were compared with those of 1960 and 1969. Though the number of examinations per year shows a yearly increase, the genetically significant dose is gradually on the decrease. This may be due to technical improvements in medical radiological practices.

Determination of isodose curves in Radiotherapy using an Alanine/ESR dosemeter; Determinacion de curvas de isodosis en Radioterapia usando un dosimetro de Alanina/ESR

Energy Technology Data Exchange (ETDEWEB)

Chen, F.; Baffa, O.; Graeff, C.F.O. [Departamento de Fisica e Matematica. Universidade de Sao Paulo FFCLRP. 14040-901 Ribeirao Preto-SP (Brazil)

1998-12-31

It was studied the possible use of an Alanine/ESR dosemeter in the isodose curves mapping in normal treatments of Radiotherapy. It was manufactured a lot of 150 dosemeters with base in a mixture of D-L Alanine dust (80 %) and paraffin (20 %). Each dosemeter has 4.7 mm diameter and 12 mm length. A group of 100 dosemeters of the lot were arranged inside 50 holes of the slice 25 of the phantom Rando Man. The phantom irradiation was realized in two opposed projections (AP and PA) in Co-60 equipment. A group of 15 dosemeters was take of the same lot for obtaining the calibration curve in a 1-20 Gy range. After irradiation the signal of each dosemeter was measured in an ESR spectrometer operating in the X-band ({approx} 9.5 GHz) and the wideness of Alanine ESR spectra central line was correlated with the radiation dose. The wideness dose calibration curve resulted linear with a correlation coefficient 0.9996. The isodose curves obtained show a profile enough similar at comparing with the theoretical curves. (Author)

Dose to the uterus from radiotherapy procedures for breast carcinoma

International Nuclear Information System (INIS)

Martin Rincon, C.; Jerez Sainz, I.; Modolell Farre, I.; Espana Lopez, M.L.; Lopez Franco, P.

2001-01-01

In the early period of the pregnancy, the radiological protection of the unborn child is of particular concern. In several reports dose thresholds for deterministic effects as well as dose values that increase the probability of stochastic effects have been established. The aim of this article was to estimate the peripheral dose (PD) in order to evaluate the absorbed dose in utero for breast carcinoma treatment related to the radiotherapy procedures established in our hospital. The treatment was simulated using an anthropomorphic phantom Alderson-Rando, and two similar treatment planning with and without wedges were performed, taken into account the average field parameters used in 300 treatment planning patients. The PD values were determined with a NE 2571 ionization chamber in a General Electric linac for the treatments considered. Experimental measures provided dose in utero values slightly higher than 5 cGy, dose threshold established in some articles for radioinduced effects in the fetus. The planning system underestimated the PD values and no significant influence with the use of wedges was found. (author)

Dose characteristics of in-house-built collimators for stereotactic radiotherapy with a linear accelerator

International Nuclear Information System (INIS)

Norrgaard, F. Stefan E.; Kulmala, Jarmo A.J.; Minn, Heikki R.I.; Sipilae, Petri M.

1998-01-01

Dose characteristics of a stereotactic radiotherapy unit based on a standard Varian Clinac 4/100 4 MV linear accelerator, in-house-built Lipowitz collimators and the SMART stereotactic radiotherapy treatment planning software have been determined. Beam collimation is constituted from the standard collimators of the linear accelerator and a tertiary collimation consisting of a replaceable divergent Lipowitz collimator. Four collimators with isocentre diameters of 15, 25, 35 and 45 mm, respectively, were constructed. Beam characteristics were measured in air, acrylic or water with ionization chamber, photon diode, electron diode, diamond detector and film. Monte Carlo simulation was also applied. The radiation leakage under the collimators was less than 1% at 50 mm depth in water. Specific beam characteristics for each collimator were imported to SMART and dose planning with five non-coplanar converging 140 deg. arcs separated by 36 deg. angles was performed for treatment of a RANDO phantom. Dose verification was made with TLD and radiochromic film. The in-house-built collimators were found to be suitable for stereotactic radiotherapy and patient treatments with this system are in progress. (author)

Dose compensation of the total body irradiation therapy

International Nuclear Information System (INIS)

Lin, J.-P.; Chu, T.-C.; Liu, M.-T.

2001-01-01

The aim of the study is to improve dose uniformity in the body by the compensator-rice and to decrease the dose to the lung by the partial lung block. Rando phantom supine was set up to treat bilateral fields with a 15 MV linear accelerator at 415 cm treatment distance. The experimental procedure included three parts. The first part was the bilateral irradiation without rice compensator, and the second part was with rice compensator. In the third part, rice compensator and partial lung block were both used. The results of thermoluminescent dosimeters measurements indicated that without rice compensator the dose was non-uniform. Contrarily, the average dose homogeneity with rice compensator was measured within ±5%, except for the thorax region. Partial lung block can reduce the dose which the lung received. This is a simple method to improve the dose homogeneity and to reduce the lung dose received. The compensator-rice is cheap, and acrylic boxes are easy to obtain. Therefore, this technique is suitable for more studies

Gonad dose in cineurethrocystography

International Nuclear Information System (INIS)

Ardran, G.M.; Dixon-Brown, A.; Fursdon, P.S.

1978-01-01

The technical factors used for cineurethrocystography for the true lateral projection in females are given. The mid-line radiation dose has been measured with LiF TLD inserted into the vagina in 19 examinations. The average dose recorded was 148 mrad, the range being 50 to 306 mrad, the average number of cine frames exposed was 96. Data obtained using a Rando phantom indicated that the average ovary dose would be 30% greater than the mid-line dose since the near ovary receives a higher dose than the more distant one. The technique used for men is also given, the average gonad dose in six men being 123 mrad, range 56 to 243 mrad when simple lead foil gonad protection was used; the average number of cine frames was 107. The dose in one man without gonad protection was 1575 mrad for 112 cine frames. The results for both sexes compare favourably with those of others reported in the literature and with gonad doses recorded in typical IVP examinations. (author)

Ultra-low dose dual-source high-pitch computed tomography of the paranasal sinus: diagnostic sensitivity and radiation dose

International Nuclear Information System (INIS)

Schulz, Boris; Zangos, Stefan; Friedrichs, Ingke; Bauer, Ralf W.; Kerl, Matthias; Vogl, Thomas J.; Martin M Mack, Martin M.; Potente, Stefan

2012-01-01

Background: Today's gold standard for diagnostic imaging of inflammatory diseases of the paranasal sinus is computed tomography (CT). Purpose: To evaluate diagnostic sensitivity and radiation dose of an ultra-low dose dual-source CT technique. Material and Methods: Paranasal sinuses of 14 cadaveric heads were independently evaluated by two readers using a modern dual-source CT with lowest reasonable dosage in high-pitch mode (100 kV, 10 mAs, collimation 0.6 mm, pitch value 3.0). Additionally the head part of an anthropomorphic Alderson-Rando phantom was equipped with thermoluminescent detectors to measure radiation exposure to the eye lenses and thyroid gland. Results: Diagnostic accuracy regarding sinusoidal fluid, nasal septum deviation, and mucosal swelling was 100%. Mastoid fluid was detected in 76% and 92%, respectively. In the phantom study, average measured eye lens dosage was 0.64 mGy; radiation exposure of the thyroid gland was 0.085 mGy. Conclusion: Regarding evaluation of inflammatory diseases of the paranasal sinus this study indicates sufficient accuracy of the proposed CT protocol at a very low dosage level

Kutseharidusega inimesed tööturul = People with vocational education in the labour market / Tiiu-Liisa Rummo

Index Scriptorium Estoniae

Rummo, Tiiu-Liisa

2007-01-01

Eesti tööealises rahvastikus on 2005. aasta tööjõu-uuringu andmetel kutse (keskeri-)haridusega inimesi 36,5% - mehi 48,6% ja naisi 51,4%, vähenemas on kutseharidusega inimeste töötuse määr. Lisatud tabelid ja diagrammid

'Videokunst on tõsine asi,' räägib kunstnik Al Paldrock / Al Paldrok ; interv. Tiiu Leis

Index Scriptorium Estoniae

Paldrok, Al, 1969-

1998-01-01

Intervjuu Pärnu filmipäevade (2.-4. apr.) ühe peakorraldaja, Helsingis Kuvataide akadeemias video- ja keskkonnakunsti õppinud Al Paldrokiga filmipäevadest (kus esitatakse nii video-, reklaam- kui dokumentaalfilme), eesti filmist ja videokunstist, rühmitusest 'Vedelik'

EU enlargement and trade integration : can we distinguish the Baltic Sea region cluster? / Tiiu Paas, Egle Tafenau

Index Scriptorium Estoniae

Paas, Tiiu, 1949-

2004-01-01

Uurimistulemused kinnitavad piiriüleste kaubandussidemete olemasolu ning Läänemere regiooni riikide omavahelise kaubandusintegratsiooni tugevust ühinevas Euroopas, millega tuleb EL-i regionaalpoliitika kujundamisel arvestada. Diagrammid. Tabel

Salonen: kõik tšetšeenid juba ootavad seda filmi / Hannu Salonen ; intervjueerinud Tiiu Laks

Index Scriptorium Estoniae

Salonen, Hannu, 1972-

2009-01-01

Režissöör oma uuest mängufilmist "Vasha" (endine tööpealkiri "Kid ja Killer"), Eesti, Soome, Saksamaa ja Iirimaa koostööfilm, kus kesksetes osades on eestlastest Mart Müürisepp, Rein Oja, Jan Uuspõld jt

Täiskasvanute õppimisvõimalused ja -valmidus = Adult education possibilities and readiness to study / Tiiu-Liisa Rummo-Laes

Index Scriptorium Estoniae

Rummo-Laes, Tiiu-Liisa

2009-01-01

Artiklis analüüsitakse Eesti ettevõtete koolitusvalmidust ja õppimisvõimaluste pakkumist ning 25-64-aastaste õppimisvalmidust. Kasutatud on nii 2005. aasta uuringu "Täiskasvanute koolitus ettevõtetes" kui ka 2007. aasta täiskasvanute koolituse uuringu andmeid

Ökoloogia ja keskkonnateaduste doktorikool : täitus aasta projekti käivitumisest TLÜs / Tiiu Koff

Index Scriptorium Estoniae

Koff, Tiiu, 1955-

2006-01-01

Koostöös Ökoloogia ja keskkonnateaduste doktorikooliga toimusid Tallinna Ülikoolis Exeteri Ülikooli professor Christopher J. Caseldine ja Hulli Ülikooli lektor Jane Buntingi loengud ning Post-POLLANDCAL teadusvõrgustiku seminar Ökoloogia Instituudis

Viga on öelda, et me ei vaja PRi / Roger Hayes, Alasdair Sutherland ; interv. Tiiu Värbu

Index Scriptorium Estoniae

Hayes, Roger

2001-01-01

Eesti Suhtekorraldajate Liidu 5. aastapäeva seminaril osalevad Rahvusvahelise Kommunikatsiooni Instituudi direktor R. Hayes ja maailma ühe juhtiva suhtekorraldusfirma Manning, Selvage & Lee asepresident A. Sutherland

Aitab jumalateenistust paremini korraldada / Tiiu Pikkur ; kommenteerinud Tiit Salumäe, Jaak Salumäe, Arne Hiob

Index Scriptorium Estoniae

Pikkur, Tiiu, 1947-

2009-01-01

17. märtsil peeti Tallinna Piiskoplikus Toomkirikus tänujumalateenistus, kus esitleti Eesti luterliku rahvakiriku esimese Eestimaal koostatud ja trükitud liturgiakäsiraamatu - neljaköitelise kirikukäsiraamatu kaht esimest osa: "Jumalateenistuste käsiraamatut" ja "Talituste käsiraamatut"

The impact of the AEC mode of tube current on the dose at CT scans

Energy Technology Data Exchange (ETDEWEB)

Moon, Il Bong; Dong, Kyung Rae [Dept. of Radiological Technology, Gwangju Health University, Gwangju (Korea, Republic of); Kim, Kwang Cheol [Dept. of of Nuclear Engineering, Chosun University,Gwangju (Korea, Republic of)

2016-11-15

In this study, the automatic exposure control (AEC) modes of tube current (SIEMENSCare Dose 4D and GE AEC mode) that CT manufacturers are using was applied to neck, chest and abdomen in order to determine the difference in the respective dose parameters (CTDIvol, DLP and mSv) resulting from the dose reduction. Equipment in use at C university adopted Care Dose 4D of Siemens and AEC mode of General Electric (GE), and the x-ray exposure conditions were adjusted to be as identical as possible between the experiments. For the assessment of the dose reduction, the differences between the doses with and without the use of the tube current AEC mode by the respective manufacturer were measured for each body part including neck, chest and abdomen of a human phantom, Rando Phantom (Art-200x, Fluke Biomedical, USA). First, the assessment of SIEMENS-Care Dose 4D yielded the following results. At the neck, the automatic exposure control resulted in a 3.3% reduction in CTDIvol and DLP, and a 3% reduction in the effective dose, mSv, compared to manual exposure control. The automatic exposure control at the chest displayed the reduction in CTDIvol and DLP by 25.5%, and in the effective dose, mSv, by 25.4% compared to the manual exposure control. In case of abdomen, CTDIvol and DLP were shown to be reduced by 16%, and the effective dose (mSv) by 16.3% under the automatic exposure control compared to the manual exposure. Second, the assessment results of GE AEC mode are as follows. The automatic exposure control at the neck resulted in a 45.1% reduction in CTDIvol and DLP, and a 44.7% reduction in the effective dose (mSv) in comparison to the manual exposure control. At the chest, the automatic exposure control displayed a 47.6% reduction in CTDIvol and DLP, and a 47.5% reduction in the effective dose, mSv, compared to the manual exposure control. At the abdomen, it was shown that CTDIvol and DLP were reduced by 26.9%, and the effective dose (mSv) by 26.8% under the automatic

The impact of the AEC mode of tube current on the dose at CT scans

International Nuclear Information System (INIS)

Moon, Il Bong; Dong, Kyung Rae; Kim, Kwang Cheol

2016-01-01

In this study, the automatic exposure control (AEC) modes of tube current (SIEMENSCare Dose 4D and GE AEC mode) that CT manufacturers are using was applied to neck, chest and abdomen in order to determine the difference in the respective dose parameters (CTDIvol, DLP and mSv) resulting from the dose reduction. Equipment in use at C university adopted Care Dose 4D of Siemens and AEC mode of General Electric (GE), and the x-ray exposure conditions were adjusted to be as identical as possible between the experiments. For the assessment of the dose reduction, the differences between the doses with and without the use of the tube current AEC mode by the respective manufacturer were measured for each body part including neck, chest and abdomen of a human phantom, Rando Phantom (Art-200x, Fluke Biomedical, USA). First, the assessment of SIEMENS-Care Dose 4D yielded the following results. At the neck, the automatic exposure control resulted in a 3.3% reduction in CTDIvol and DLP, and a 3% reduction in the effective dose, mSv, compared to manual exposure control. The automatic exposure control at the chest displayed the reduction in CTDIvol and DLP by 25.5%, and in the effective dose, mSv, by 25.4% compared to the manual exposure control. In case of abdomen, CTDIvol and DLP were shown to be reduced by 16%, and the effective dose (mSv) by 16.3% under the automatic exposure control compared to the manual exposure. Second, the assessment results of GE AEC mode are as follows. The automatic exposure control at the neck resulted in a 45.1% reduction in CTDIvol and DLP, and a 44.7% reduction in the effective dose (mSv) in comparison to the manual exposure control. At the chest, the automatic exposure control displayed a 47.6% reduction in CTDIvol and DLP, and a 47.5% reduction in the effective dose, mSv, compared to the manual exposure control. At the abdomen, it was shown that CTDIvol and DLP were reduced by 26.9%, and the effective dose (mSv) by 26.8% under the automatic

Data processing with PC-9801 micro-computer for HCN laser scattering experiments

International Nuclear Information System (INIS)

Iwasaki, T.; Okajima, S.; Kawahata, K.; Tetsuka, T.; Fujita, J.

1986-09-01

In order to process the data of HCN laser scattering experiments, a micro-computer software has been developed and applied to the measurements of density fluctuations in the JIPP T-IIU tokamak plasma. The data processing system consists of a spectrum analyzer, SM-2100A Signal Analyzer (IWATSU ELECTRIC CO., LTD.), PC-9801m3 micro-computer, a CRT-display and a dot-printer. The output signals from the spectrum analyzer are A/D converted, and stored on a mini-floppy-disk equipped to the signal analyzer. The software to process the data is composed of system-programs and several user-programs. The real time data processing is carried out for every shot of plasma at 4 minutes interval by the micro-computer connected with the signal analyzer through a GP-IB interface. The time evolutions of the frequency spectrum of the density fluctuations are displayed on the CRT attached to the micro-computer and printed out on a printer-sheet. In the case of the data processing after experiments, the data stored on the floppy-disk of the signal analyzer are read out by using a floppy-disk unit attached to the micro-computer. After computation with the user-programs, the results, such as monitored signal, frequency spectra, wave number spectra and the time evolutions of the spectrum, are displayed and printed out. In this technical report, the system, the software and the directions for use are described. (author)

212ʻ Fahrenheiti : eesti luule 2006 / Piret Bristol

Index Scriptorium Estoniae

Bristol, Piret, 1968-

2008-01-01

Järgmistest 2006. a. ilmunud luulekogudest: Ryytle, Indrek. Inglid rokijaamas. Puhja : I. Rüütle ; Runnel, Hando. Viru veri ei värise. Tartu : Ilmamaa ; Vabat, Martin. Mina olengi kirjandusklassik. Tartu : Eesti Kirjanduse Selts ; Korts, Eliina. Lööklaused murravad metsi. Tartu : Eesti Kirjanduse Selts ; Koff, Indrek. Vana laul. Luige : Verb ; Teede, Andra. Takso Tallinna taevas. Luige : Verb ; Vusser, Kaspar. Vusserduste võnked. Tallinn : P. Kukk ; Elbing, Andrus. Siin Beebilõust, tere! : häired pimelinna tänavalt = Ciao, it's Babyface : trouble from the streets of a blind city. Tallinn : Epifanio ; Hint, Miina. Vabaduse vang, ehk, Põrandaalune kirjandus. Tallinn : MR ; Jüriado, Tiiu. Luule on ime. Habaja : Kentaur ; Ligi, Katre. Naabrivalve. Tartu : Ilmamaa ; Krull, Hasso. Talv. Tallinn : Tuum ; Mets, Mae. Pühapäeval on reede. Tartu : Ilmamaa ; Ploom, Ülar. Porr ja sorry. Tallinn : Tuum ; Hirv, Indrek, Surmapõletaja. Tallinn : Tuum ; Piir, Milvi Martina. Kõrkjavaas. Tartu : Fantaasia ; Soomets, Triin. Väljas. Tallinn : Tuum ; Mathura. Kohalolu. Rapla : Allikäärne ; Afanasjev, Vahur. Katedraal Emajões. Tartu ; Brüssel : ID Salong//Sild, Ivar. Spermaga ja puha. Pärnu : Jumalikud Ilmutused ; Meiel, Kaupo. Polügrafisti käsiraamat. Pärnu : Jumalikud Ilmutused ; Kivisildnik, Sven. Vägistatud jäämägi. Pärnu : Jumalikud Ilmutused ; Arder, Ott. Luule sünnib kus sünnib kui sünnib / koost. Leelo Tungal. Tallinn : Tänapäev ; Kompus, Marko. Vallaliste jõgede tõkkejooksja. Tartu : M. Kompus

Digitaalmälu seminaril räägiti veebisisu säilitamisest / Jaanus Kõuts, Tiiu Daniel, Elis Karpov

Index Scriptorium Estoniae

Kõuts, Jaanus, 1976-

2015-01-01

Ülevaade 28. jaanuaril Eesti Rahvusraamatukogus toimunud järjekorras kuuendast rahvusvahelisest seminarist sarjast Digitaalmälu (Digital Memory) pealkirjaga „Veebiarhiveerimise roll andmerikka ühiskonna ajaloo säilitamisel” (Web Archiving: Preserving the History of Data-Driven Society)

Meie skandaalitsesime ka! Jaanipäeval võttis MM suuna teatrifestivalile "Baltoscandal" / Anu Aaremäe, Tiiu Suvi

Index Scriptorium Estoniae

Aaremäe, Anu

2000-01-01

Meeldejäävaimaid "teatripärleid" Rakvere teatrifestivalilt "Baltoscandal 2000" : Oskaras Korshunovas Theatre, Marius von Mayenburgi "Tule nägu" ("The Face of Fire"), lavastaja O. Korshunovas, Pit Uttoni ühemehetükk "Adolf", Sasha Pepeljajevi trupi "One Second Hand" ja poola "Moisture", lavastaja Madzik Leszek

Regional income convergence during the pre-enlargement period of the European Union / Tiiu Paas, Andres Kuusk, Friso Schlitte

Index Scriptorium Estoniae

Paas, Tiiu, 1949-

2006-01-01

Artikli analüüsiobjektiks on tulutasemete ebavõrdsus ja konvergents EL-25 riikides. Regionaalsete tulutasemete analüüsi tulemused annavad tunnistust olulisest regionaalsest ebavõrdsusest nii Euroopa Liidu vanades kui uutes (analüüsitaval perioodil veel kandidaatriikides) liikmesriikides. Tabelid

Radiation dose in dental radiology

International Nuclear Information System (INIS)

Cohnen, M.; Kemper, J.; Moedder, U.; Moebes, O.; Pawelzik, J.

2002-01-01

The aim of this study was to compare radiation exposure in panoramic radiography (PR), dental CT, and digital volume tomography (DVT). An anthropomorphic Alderson-Rando phantom and two anatomical head phantoms with thermoluminescent dosimeters fixed at appropriate locations were exposed as in a dental examination. In PR and DVT, standard parameters were used while variables in CT included mA, pitch, and rotation time. Image noise was assessed in dental CT and DVT. Radiation doses to the skin and internal organs within the primary beam and resulting from scatter radiation were measured and expressed as maximum doses in mGy. For PR, DVT, and CT, these maximum doses were 0.65, 4.2, and 23 mGy. In dose-reduced CT protocols, radiation doses ranged from 10.9 to 6.1 mGy. Effective doses calculated on this basis showed values below 0.1 mSv for PR, DVT, and dose-reduced CT. Image noise was similar in DVT and low-dose CT. As radiation exposure and image noise of DVT is similar to low-dose CT, this imaging technique cannot be recommended as a general alternative to replace PR in dental radiology. (orig.)

In vivo dosimetry with semiconductor and thermoluminescent detectors applied to head and neck cancer treatment

International Nuclear Information System (INIS)

Viegas, Claudio Castelo Branco

2003-03-01

In vivo dosimetry in radiotherapy, i. e, the assessment of the doses received by patients during their treatments, permits a verification of the therapy quality. A routine of in vivo dosimetry is, undoubtedly, a direct benefit for the patient. Unfortunately, in Brazil and in Latin America this procedure is still a privilege for only a few patients. This routine is of common application only in developed countries. The aim of this work is to show the viability and implementation of a routine in vivo dosimetry, using diodes semiconductors and thermoluminescent dosimeters (TLD), at the radiotherapy section of the National Institute of Cancer in Brazil, in the case of head and neck cancer treatment. In order to reach that aim, the characteristics of the response of diodes ISORAD-p and LiF:Mg;Ti (TLD-100) thermoluminescent detectors in powder form were determined. The performance of those detectors for in vivo dosimetry was tested using an RANDO Alderson anthropomorfic phantom and, once their adequacy proved for the kind of measurements proposed, they were used for dose assessment in the case of tumour treatments in the head and neck regions, for Cobalt-60 irradiations. (author)

Determination of organ doses in radiographic imaging and diagnostic radiology

International Nuclear Information System (INIS)

Rathjen, M.

1981-01-01

Earlier publications on diagnostic radiation exposure commonly presented data on the gonadal dose. This emphasis on the genetic radiation risk is no longer valid in view of recent radiobiological findings; equal attention should be paid to the somatic radiation risk which is manifested by the induction of malignant neoplasms, e.g. in the lungs, red bone marrow, thyroid and female breast (ICRP 26). The permissible radiation doses for these organs and the gonals for routine diagnostic radiology are determined. A formula is established on the basis of terms from relevant publications (e.g. open-air dose, backscattering factor) and from the author's own measurements in an Alderson-Rando phantom (depth dose curves, dose decrements). The measurements were carried out using CaP 2 thermoluminescence dosemeters, and the organ doses for the various techniques of X-ray examination were calculated by computer. Calculations of this type will enable the radiologist to determine the patient exposure quickly and easily from the records kept according to Sect. 29 of the X-ray Ordinance. Experimental value from relevant publications are compared with the author's own results. (orig./HP) [de

Assessing doses of radiotherapy with the risk of developing cancer in the head and neck

International Nuclear Information System (INIS)

Yu, Cheng-Ching; Hsu, Fang-Yuh; Yu, Wan-Hsuan; Liu, Mu-Tai; Huang, Sheng-Shien

2011-01-01

Radiation is known to be a major cause of cancer in normal tissue. After treatment with radiotherapy, for young patients or the patients can survive for a long time, the radiation-induced cancer risk is noteworthy. This research investigated the dose delivered by the treatment of intensity modulated radiation therapy (IMRT) for head and neck cancer, such as NPC and oral cancer, and assessed the risk of developing radiation-induced secondary cancer in non-targeted normal tissues. A Rando phantom was used to simulate a patient with NPC or oral cancer, and thermoluminescent dosimeter (TLD) chips were placed inside the phantom to estimate the doses delivered by IMRT. In summary, the risks to patients with NPC was somewhat higher than for those with oral cancer, because the region of the PTV was lower, requiring larger field sizes be used for cases of NPC. The smaller the field size used, the less the risk was of developing secondary cancer. In addition, the higher the value of MU used, the higher the dose delivered to normal tissues was. The risk of radiation-induced secondary cancer was proportional to the delivered dose.

Application of digital image processing for the generation of voxels phantoms for Monte Carlo simulation

Energy Technology Data Exchange (ETDEWEB)

Boia, L.S.; Menezes, A.F.; Cardoso, M.A.C. [Programa de Engenharia Nuclear/COPPE (Brazil); Rosa, L.A.R. da [Instituto de Radioprotecao e Dosimetria-IRD, Av. Salvador Allende, s/no Recreio dos Bandeirantes, CP 37760, CEP 22780-160 Rio de Janeiro, RJ (Brazil); Batista, D.V.S. [Instituto de Radioprotecao e Dosimetria-IRD, Av. Salvador Allende, s/no Recreio dos Bandeirantes, CP 37760, CEP 22780-160 Rio de Janeiro, RJ (Brazil); Instituto Nacional de Cancer-Secao de Fisica Medica, Praca Cruz Vermelha, 23-Centro, 20230-130 Rio de Janeiro, RJ (Brazil); Cardoso, S.C. [Departamento de Fisica Nuclear, Instituto de Fisica, Universidade Federal do Rio de Janeiro, Bloco A-Sala 307, CP 68528, CEP 21941-972 Rio de Janeiro, RJ (Brazil); Silva, A.X., E-mail: ademir@con.ufrj.br [Programa de Engenharia Nuclear/COPPE (Brazil); Departamento de Engenharia Nuclear/Escola Politecnica, Universidade Federal do Rio de Janeiro, Ilha do Fundao, Caixa Postal 68509, 21945-970 Rio de Janeiro, RJ (Brazil); Facure, A. [Comissao Nacional de Energia Nuclear, R. Gal. Severiano 90, sala 409, 22294-900 Rio de Janeiro, RJ (Brazil)

2012-01-15

This paper presents the application of a computational methodology for optimizing the conversion of medical tomographic images in voxel anthropomorphic models for simulation of radiation transport using the MCNP code. A computational system was developed for digital image processing that compresses the information from the DICOM medical image before it is converted to the Scan2MCNP software input file for optimization of the image data. In order to validate the computational methodology, a radiosurgery treatment simulation was performed using the Alderson Rando phantom and the acquisition of DICOM images was performed. The simulation results were compared with data obtained with the BrainLab planning system. The comparison showed good agreement for three orthogonal treatment beams of {sup 60}Co gamma radiation. The percentage differences were 3.07%, 0.77% and 6.15% for axial, coronal and sagital projections, respectively. - Highlights: Black-Right-Pointing-Pointer We use a method to optimize the CT image conversion in voxel model for MCNP simulation. Black-Right-Pointing-Pointer We present a methodology to compress a DICOM image before conversion to input file. Black-Right-Pointing-Pointer To validate this study an idealized radiosurgery applied to the Alderson phantom was used.

The validation of organ dose calculations using voxel phantoms and Monte Carlo methods applied to point and water immersion sources.

Science.gov (United States)

Hunt, J G; da Silva, F C A; Mauricio, C L P; dos Santos, D S

2004-01-01

The Monte Carlo program 'Visual Monte Carlo-dose calculation' (VMC-dc) uses a voxel phantom to simulate the body organs and tissues, transports photons through this phantom and reports the absorbed dose received by each organ and tissue relevant to the calculation of effective dose as defined in ICRP Publication 60. This paper shows the validation of VMC-dc by comparison with EGSnrc and with a physical phantom containing TLDs. The validation of VMC-dc by comparison with EGSnrc was made for a collimated beam of 0.662 MeV photons irradiating a cube of water. For the validation by comparison with the physical phantom, the case considered was a whole body irradiation with a point 137Cs source placed at a distance of 1 m from the thorax of an Alderson-RANDO phantom. The validation results show good agreement for the doses obtained using VMC-dc and EGSnrc calculations, and from VMC-dc and TLD measurements. The program VMC-dc was then applied to the calculation of doses due to immersion in water containing gamma emitters. The dose conversion coefficients for water immersion are compared with their equivalents in the literature.

The validation of organ dose calculations using voxel phantoms and Monte Carlo methods applied to point and water immersion sources

International Nuclear Information System (INIS)

Hunt, J. G.; Da Silva, F. C. A.; Mauricio, C. L. P.; Dos Santos, D. S.

2004-01-01

The Monte Carlo program 'Visual Monte Carlo-dose calculation' (VMC-dc) uses a voxel phantom to simulate the body organs and tissues, transports photons through this phantom and reports the absorbed dose received by each organ and tissue relevant to the calculation of effective dose as defined in ICRP Publication 60. This paper shows the validation of VMC-dc by comparison with EGSnrc and with a physical phantom containing TLDs. The validation of VMC-dc by comparison with EGSnrc was made for a collimated beam of 0.662 MeV photons irradiating a cube of water. For the validation by comparison with the physical phantom, the case considered was a whole body irradiation with a point 137 Cs source placed at a distance of 1 m from the thorax of an Alderson-RANDO phantom. The validation results show good agreement for the doses obtained using VMC-dc and EGSnrc calculations, and from VMC-dc and TLD measurements. The program VMC-dc was then applied to the calculation of doses due to immersion in water containing gamma emitters. The dose conversion coefficients for water immersion are compared with their equivalents in the literature. (authors)

Radiosurgery for cerebral arteriovenous malformation during pregnancy: A case report focusing on fetal exposure to radiation

Science.gov (United States)

Nagayama, Kazuki; Kurita, Hiroki; Tonari, Ayako; Takayama, Makoto; Shiokawa, Yoshiaki

2010-01-01

Introduction: We present the case of a pregnant woman who underwent linear accelerator (LINAC)-based stereotactic radiosurgery (SRS) and we discuss the fetal exposure to radiation. Clinical Presentation: A 20-year-old woman at 18 weeks of gestation presented with right cerebral hemorrhage and underwent urgent evacuation of the hematoma. She recovered well after surgery, but cerebral angiography after the surgery revealed a small deeply seated arteriovenous malformation (AVM) in the right frontal lobe extending to the right basal ganglia. Methods and Results: We examined the diffuse AVM and treated it with LINAC-based SRS at 24 weeks of gestation. Before SRS, the fetus was exposed to a radiation dose of 8.26 mGy, which was estimated by conducting an experiment using an adult RANDO phantom, and a radiophotoluminescent (RPL) glass rod dosimeter (GRD) system. The patient underwent Caesarean delivery at 36 weeks of gestation and gave birth to a healthy baby. Conclusion: The exposure of fetus to radiation during SRS was exceedingly low. SRS can be used as an alternative treatment to microsurgery for resolving small deeply seated AVMs even in pregnant patients. PMID:22028762

In vivo dosimetry with semiconductor and thermoluminescent detectors applied to head and neck cancer treatment; Dosimetria in vivo com uso de detectores semicondutores e termoluminescentes aplicada ao tratamento de cancer de cabeca e pescoco

Energy Technology Data Exchange (ETDEWEB)

Viegas, Claudio Castelo Branco

2003-03-15

In vivo dosimetry in radiotherapy, i. e, the assessment of the doses received by patients during their treatments, permits a verification of the therapy quality. A routine of in vivo dosimetry is, undoubtedly, a direct benefit for the patient. Unfortunately, in Brazil and in Latin America this procedure is still a privilege for only a few patients. This routine is of common application only in developed countries. The aim of this work is to show the viability and implementation of a routine in vivo dosimetry, using diodes semiconductors and thermoluminescent dosimeters (TLD), at the radiotherapy section of the National Institute of Cancer in Brazil, in the case of head and neck cancer treatment. In order to reach that aim, the characteristics of the response of diodes ISORAD-p and LiF:Mg;Ti (TLD-100) thermoluminescent detectors in powder form were determined. The performance of those detectors for in vivo dosimetry was tested using an RANDO Alderson anthropomorfic phantom and, once their adequacy proved for the kind of measurements proposed, they were used for dose assessment in the case of tumour treatments in the head and neck regions, for Cobalt-60 irradiations. (author)

Behaviour of candidate materials for fusion applications under high surface heat loads

International Nuclear Information System (INIS)

Bolt, H.; Nickel, H.; Kuroda, T.; Miyahara, A.

1988-07-01

High heat fluxes to in-vessel components of nuclear fusion devices (tokamaks) during normal operation and abnormal operation conditions are one of the governing issues in the selection of a plasma facing material and the design of first wall components. Their failure under high heat loads during service can severely influence the further operability of the entire fusion device. In order to determine the response of candidate materials to high heat fluxes an experimental program was carried out using the 10 MW Neutral Beam Injection Test Stand of the Institute for Plasma Physics of Nagoya University. Metal samples, 13 different fine grain graphites, carbon - carbon composites, and pyrolytic carbon samples were subjected to heat loads between 16 and 117 MW/m 2 and pulse durations of 50 to 950 ms. Afterwards the resulting structural changes as well as threshold values for the occurance of material damage were determined. The main damage observed on carbon materials was cracking in the case of graphites and pyrolytic carbon and erosion in the case of graphites and carbon - carbon composites. Processes leading to such damage were discussed and described in form of models. Parallel to these laboratory experiments numerical analyses of the response of graphite materials to high heat fluxes were carried out. The results are in general agreement with the experimentally determined values. In order to verify the results from experiments and numerical analyses, graphite test limiters were exposed to about 900 discharges in the JIPP T-IIU tokamak. These proof tests fully confirmed the results obtained. (orig.) [de

Ethylene-vinyl acetate foam as a new lung substitute in radiotherapy.

Science.gov (United States)

Marqués, Enrique; Mancha, Pedro J

2018-04-01

The purpose of this study was to evaluate ethylene-vinyl acetate (EVA) foam as a new lung substitute in radiotherapy and to study its physical and dosimetric characteristics. We calculated the ideal vinyl acetate (VA) content of EVA foam sheets to mimic the physical and dosimetric characteristics of the ICRU lung tissue. We also computed the water-to-medium mass collision stopping power ratios, mass attenuation coefficients, CT numbers, effective atomic numbers and electron densities for: ICRU lung tissue, the RANDO commercial phantom, scaled WATER and EVA foam sheets with varying VA contents in a range between the minimum and maximum values supplied by the manufacturer. For all these substitutes, we simulated percent depth-dose curves with EGSnrc Monte Carlo (MC PDDs) in a water-lung substitute-water slab phantom expressed as dose-to-medium and dose-to-water for 3 × 3- and 10 × 10-cm 2 field sizes. PDD for the 10 × 10-cm 2 field size was also calculated with the MultiGrid Superposition algorithm (MGS PDD) for a relative electron density to water ratio of 0.26. The latter was compared with the MC PDDs in dose-to-water for scaled WATER and EVA foam sheets with the VA content that was most similar to the calculated ideal content that is physically achievable in practice. We calculated an ideal VA content of 55%; however, the maximum physically achievable content with current manufacturing techniques is 40%. The physical characteristics of the EVA foam sheets with a VA content of 40% (EVA40) are very close to those of the ICRU lung reference. The physical densities of the EVA40 foam sheets ranged from 0.030 to 0.965 g/cm 3 , almost covering the entire physical density range of the inflated/deflated lung (0.260-1.050 g/cm 3 ). Its mass attenuation coefficient at the effective energy of a 6-MV photon beam agrees within 0.8% of the ICRU reference value, and its CT number agrees within 6 HU. The effective atomic number for EVA40 varies by less than 0.42 of the

Linnagaleriis avati ülevaatenäitus 'Pärnu sügis 98' / Leonhard Lapin, Inge Teder ; interv. Tiiu Leis

Index Scriptorium Estoniae

Lapin, Leonhard, 1947-

1998-01-01

14. okt avati Pärnu Linnagaleriis Pärnu kunstnike maalinäitus, töid valisid Kunstiakadeemia õppejõud Leonhard Lapin ja Inge Teder ning Linnagalerii nõukogu liige Feliks Krapp. Intervjuu L. Lapini ja Inge Tederiga.

Radiation dose evaluation of dental cone beam computed tomography using an anthropomorphic adult head phantom

Science.gov (United States)

Wu, Jay; Shih, Cheng-Ting; Ho, Chang-hung; Liu, Yan-Lin; Chang, Yuan-Jen; Min Chao, Max; Hsu, Jui-Ting

2014-11-01

Dental cone beam computed tomography (CBCT) provides high-resolution tomographic images and has been gradually used in clinical practice. Thus, it is important to examine the amount of radiation dose resulting from dental CBCT examinations. In this study, we developed an in-house anthropomorphic adult head phantom to evaluate the level of effective dose. The anthropomorphic phantom was made of acrylic and filled with plaster to replace the bony tissue. The contour of the head was extracted from a set of adult computed tomography (CT) images. Different combinations of the scanning parameters of CBCT were applied. Thermoluminescent dosimeters (TLDs) were used to measure the absorbed doses at 19 locations in the head and neck regions. The effective doses measured using the proposed phantom at 65, 75, and 85 kVp in the D-mode were 72.23, 100.31, and 134.29 μSv, respectively. In the I-mode, the effective doses were 108.24, 190.99, and 246.48 μSv, respectively. The maximum percent error between the doses measured by the proposed phantom and the Rando phantom was l4.90%. Therefore, the proposed anthropomorphic adult head phantom is applicable for assessing the radiation dose resulting from clinical dental CBCT.

Evaluation of DQA for tomography using 3D volumetric phantom

Energy Technology Data Exchange (ETDEWEB)

Lee, Sang Uk [Dept. of Radiation Oncology, Catholic University of Incheon St. Mary' s Hospital, Incheon (Korea, Republic of); Kim, Jeong Koo [Dept. of Radiological Science, Hanseo University, Seosan (Korea, Republic of)

2016-12-15

The study investigates the necessity of 3 dimensional dose distribution evaluation instead of point dose and 2 dimensional dose distribution evaluation. Treatment plans were generated on the RANDO phantom to measure the precise dose distribution of the treatment site 0.5, 1, 1.5, 2, 2.5, 3 cm with the prescribed dose; 1,200 cGy, 5 fractions. Gamma analysis (3%/3 mm, 2%/2 mm) of dose distribution was evaluated with gafchromic EBT2 film and ArcCHECK phantom. The average error of absolute dose was measured at 0.76±0.59% and 1.37±0.76% in cheese phantom and ArcCHECK phantom respectively. The average passing ratio for 3%/3 mm were 97.72±0.02% and 99.26±0.01% in gafchromic EBT2 film and ArcCHECK phantom respectively. The average passing ratio for 2%/2 mm were 94.21±0.02% and 93.02±0.01% in gafchromic EBT2 film and ArcCHECK phantom respectively. There was a more accurate dose distribution of 3D volume phantom than cheese phantom in patients DQA using tomotherapy. Therefor it should be evaluated simultaneously 3 dimensional dose evaluation on target and peripheral area in rotational radiotherapy such as tomotherapy.

Characterization of MOSFET detectors for in vivo dosimetry in interventional radiology and for dose reconstruction in case of overexposure.

Science.gov (United States)

Bassinet, Céline; Huet, Christelle; Baumann, Marion; Etard, Cécile; Réhel, Jean-Luc; Boisserie, Gilbert; Debroas, Jacques; Aubert, Bernard; Clairand, Isabelle

2013-04-01

As MOSFET (Metal Oxide Semiconductor Field Effect Transistor) detectors allow dose measurements in real time, the interest in these dosimeters is growing. The aim of this study was to investigate the dosimetric properties of commercially available TN-502RD-H MOSFET silicon detectors (Best Medical Canada, Ottawa, Canada) in order to use them for in vivo dosimetry in interventional radiology and for dose reconstruction in case of overexposure. Reproducibility of the measurements, dose rate dependence, and dose response of the MOSFET detectors have been studied with a Co source. Influence of the dose rate, frequency, and pulse duration on MOSFET responses has also been studied in pulsed x-ray fields. Finally, in order to validate the integrated dose given by MOSFET detectors, MOSFETs and TLDs (LiF:Mg,Cu,P) were fixed on an Alderson-Rando phantom in the conditions of an interventional neuroradiology procedure, and their responses have been compared. The results of this study show the suitability of MOSFET detectors for in vivo dosimetry in interventional radiology and for dose reconstruction in case of accident, provided a well-corrected energy dependence, a pulse duration equal to or higher than 10 ms, and an optimized contact between the detector and the skin of the patient are achieved.

Determination of gonad, eye and bone marrow doses with EMI-5005 head and whole body scans

International Nuclear Information System (INIS)

Nishizawa, Kanae; Iwata, Takeo; Furuya, Yoshiro; Maruyama, Takashi; Hashizume, Tadashi.

1979-01-01

Dose determinations of tissues and organs during head and whole body scanning with an EMI computed tomographic equipment have been carried out using a Rando woman phantom. The surface dose on the phantom was measured with a Sakura lith Contact film dosimeter system. The absorbed doses in the eyes, thyroids, ovaries and the bone marrow were measured with a thermoluminescent dosimeter. The resultant surface doses for head scanning were 2.8 rad (28 mGy) per scan at maximum and 0.26 rad (2.6 mGy) per scan at minimum, and the doses for whole body scanning were 2.7 rad (27 mGy) per scan at maximum and 0.1 rad (1.0 mGy) per scan at minimum. For the complete gynecological scanning consisting of 8 slices, the eye, thyroid, ovary and the bone marrow dose was 2.4 mrad (24 μGy), 3.5 mrad (35 μGy), 500 mrad (5 mGy) and 225 mrad (2.25 mGy), respectively. And, for a typical head scanning consisting of 5 slices, the eye, thyroid, ovary and the bone marrow dose was 1400 mrad (14 mGy), 46 mrad (460 μGy), 0.60 mrad (6 μGy) and 73 mrad (730 μGy), respectively. (author)

Evaluations of gonad and fetal doses for diagnostic radiology.

Science.gov (United States)

Tung, C J; Tsai, H Y

1999-07-01

A national survey of patient doses for diagnostic radiology was planned in the Republic of China. We performed a pilot study for this survey to develop a protocol of the dose assessments. Entrance skin doses and organ (including ovary, testicle and uterus) doses were measured by thermoluminescent dosimeters and calculated by means of Monte Carlo simulations for several diagnostic procedures. We derived a formula and used the RadComp software for the computation of entrance skin doses. This formula involves several factors, such as kVp, mAs, the focus-to-skin-distance and aluminum filtration. RadComp software was applied to obtain free-air entrance exposures which were converted to entrance skin doses by considering the backscattering radiation from the body. Organ doses were measured using a RANDO phantom and calculated using a mathematical phantom for several diagnostic examinations. Genetically significant doses were calculated from ovary and testicle doses for the evaluation of hereditary effects. Embryo/fetal doses were determined from the uterine doses by considering the increase in uterus size with gestational age. We found that the patient doses studied in this work were all below the reference doses recommended by the National Radiological Protection Board of the U.K.

Analysis of thyroid absorbed dose in cervical CT scan with the use of bismuth shielding

International Nuclear Information System (INIS)

Santos, Fernanda S.; Gómez, Álvaro M.L.; Mourão, Arnaldo P.; Santana, Priscila C.

2017-01-01

The Computed Tomography (CT) has become an important tool to diagnose cancer and to obtain additional information for different clinical questions. Today, it is a very fast, painless and noninvasive test that can be performed high quality images. However, CT scan usually requires a higher radiation exposure dose than a conventional radiography examination. The aim of this study is to determine the dose variation deposited in thyroid and in nearby radiosensitive organs, such as: lenses, pharynx, hypophysis, salivary gland and spinal cord with and without the use of bismuth shielded. A cervical CT scan was performed on anthropomorphic male phantom model Alderson Rando, from the occipital to the first thoracic vertebra, using a GE scanner, Discovery model with 64 channels. Dose measurements have been performed by using radiochromic film strips to register the individual doses in the organs of interest. After the phantom cervical CT scan the radiochromic film strips were processed for obtaining digital images. Digital images were worked to obtain the dose variation profiles for each film. With the data obtained, it was found the organ dose variation. The results show that the thyroid received the highest dose, 40.9 mGy, in the phantom, according to the incidence of the primary X-ray beam. (author)

Analysis of thyroid absorbed dose in cervical CT scan with the use of bismuth shielding

Energy Technology Data Exchange (ETDEWEB)

Santos, Fernanda S.; Gómez, Álvaro M.L.; Mourão, Arnaldo P., E-mail: fernanda.stephaniebh@yahoo.com.br [Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, MG (Brazil). Departamento de Engenharia Nuclear; Santana, Priscila C. [Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, MG (Brazil). Departamento de Anatomia e Imagem

2017-07-01

The Computed Tomography (CT) has become an important tool to diagnose cancer and to obtain additional information for different clinical questions. Today, it is a very fast, painless and noninvasive test that can be performed high quality images. However, CT scan usually requires a higher radiation exposure dose than a conventional radiography examination. The aim of this study is to determine the dose variation deposited in thyroid and in nearby radiosensitive organs, such as: lenses, pharynx, hypophysis, salivary gland and spinal cord with and without the use of bismuth shielded. A cervical CT scan was performed on anthropomorphic male phantom model Alderson Rando, from the occipital to the first thoracic vertebra, using a GE scanner, Discovery model with 64 channels. Dose measurements have been performed by using radiochromic film strips to register the individual doses in the organs of interest. After the phantom cervical CT scan the radiochromic film strips were processed for obtaining digital images. Digital images were worked to obtain the dose variation profiles for each film. With the data obtained, it was found the organ dose variation. The results show that the thyroid received the highest dose, 40.9 mGy, in the phantom, according to the incidence of the primary X-ray beam. (author)

Tallinna raamatuturg 17. sajandi teisel poolel : raamatukaupmees August Johann Beckerist 1673. aastal Tallinna jäänud raamatud / Tiiu Reimo

Index Scriptorium Estoniae

Reimo, Tiiu, 1953-

2014-01-01

Raamatukaubanduse ja raamatuomandi uurimisest Eestis. Raamatukauplejatest 17. sajandi Tallinnas. Beckeri raamatute loendist ja teoste identifitseerimisest. Raamatuvara sisulisest koostisest, autoritest ja teostest.

Milline mentor kõik tuksi keerab? Ja milline on hea mentor? / Marit Pajulaid, Agne Puusaar, Kaido Aettik ; kommenteerinud Tiiu Allikvee

Index Scriptorium Estoniae

Pajulaid, Marit

2010-01-01

Küsimuste üle, milline peab olema hea mentor ning mida ta peaks ja mida ta ei tohiks teha, arutlevad Fontese pooleaastase mentorprogrammi läbinud Fazer Eesti juhtrühma liige Marit Pajulaid, reklaamibüroo Division personalijuht Agne Puusaar ning endine Kuusakoski juhatuse esimees Kaido Aettik

A role of neutral hydrogen in CHS plasmas with reheat and collapse and comparison with JIPP T-IIU tokamak plasmas

International Nuclear Information System (INIS)

Morita, S.; Yamada, H.; Iguchi, H.

1992-09-01

Results are described on NBI plasmas of the Compact Helical System (CHS). An increase in the stored energy, which is called plasma 'reheat', is observed with density peaking when gas puffing is turned off in the high density region. A plasma collapse with large increase in radiation loss occurs even in discharges whose Z eff values (typically, less than 2-3) do not show any increase when the gas puffing is continued. Both phenomena are basically explained by the edge electron temperature due to the difference in the amount of edge hydrogen neutrals. After turning off the gas puffing, the central electron density n e0 shows an increase of 80% and the density peaking factor (n e0 /n-bar e ) changes from 1.0 to 2.0, in typical cases, and a high inward velocity of the impurities appears (v = 20 m/s). The accumulation is studied in relation to the poloidal rotation and the edge temperature. These results are compared with results from plasmas with IOC- and H-modes in the JIPPT-IIU tokamak. (author)

Minevikutõlgenduste ja ajakäsituste uurimine pärimusliku ajaloo vaatepunktist : kahe temaatilise jutustuse näitel / Tiiu Jaago

Index Scriptorium Estoniae

Jaago, Tiiu, 1960-

2004-01-01

Virumaa tööstusala arengut käsitlevast kahest kirjalikust jutustusest aastatest 1961 ja 2001. Artiklis analüüsitakse sündmuste ja jutustamise aja omavahelisi seoseid ning ajastu tõlgendamist mõjutavaid tegureid

Present status of research activities at the national institute for fusion science and its role in international collaboration

International Nuclear Information System (INIS)

Fujita, J.

1997-01-01

In the National Institute for Fusion Science (NIFS), Japan, a helical magnetic confinement system named Large Helical Device (LHD) is under construction with objective of comprehensive studies of high temperature plasmas in a helical system and investigation of a helical reactor as an alternative approach. Superconducting coils of l = 2, m = 10, major radius R = 3.9 m, produce a steady state helical magnetic field for confinement, together with poloidal coils on LHD. The magnetic field strength on the axis is 3.0 T in the phase I and 4.0 T in the phase II experiment. The plasma major radius in LHD is 3.75 m, and averaged plasma radius is 0.6 m. The plasma will be produced and heated with ECH, and further heated with NBI and ICRF. It is also planned to produced a steady state plasma in LHD. It is expected to have the first plasma in 1998. Small devices such as CHS and others are under operation in the NIFS for supporting the LHD project. The Data and Planning Center of NIFS is collecting, compiling and evaluating atomic and molecular data which are necessary for nuclear fusion research. The talk will include the present status of the construction of LHD, research activities on the development of heating and diagnostic devices for LHD, and experimental results obtained on CHS, JIPP T-IIU and other devices. The role of NIFS on promoting IAEA activities to bridge large scale institutions and small and medium scale laboratories for world-wide collaborations in the field of plasma physics and fusion research will also be introduced, together with an idea of organizing a regional center in Asia. (author)

Tallinna Ülikooli Infoteaduste Instituut avab 2014. aastal bakalaureuse- ja magistriõppes uued õppesuunad / Aira Lepik, Aile Möldre, Tiiu Reimo

Index Scriptorium Estoniae

Lepik, Aira, 1958-

2014-01-01

Magistriõppes avatakse infoteaduse, digitaalraamatukogunduse ja dokumentaalse kultuuripärandi haldamise õppesuunad, bakalaureuseõppes saab õppida infoteadust, raamatukogu- ja infotööd ning veebisisu loomist ja korraldust

Estimation of the radiation exposure of a chest pain protocol with ECG-gating in dual-source computed tomography

International Nuclear Information System (INIS)

Ketelsen, Dominik; Luetkhoff, Marie H.; Thomas, Christoph; Werner, Matthias; Tsiflikas, Ilias; Reimann, Anja; Kopp, Andreas F.; Claussen, Claus D.; Heuschmid, Martin; Buchgeister, Markus; Burgstahler, Christof

2009-01-01

The aim of the study was to evaluate radiation exposure of a chest pain protocol with ECG-gated dual-source computed tomography (DSCT). An Alderson Rando phantom equipped with thermoluminescent dosimeters was used for dose measurements. Exposure was performed on a dual-source computed tomography system with a standard protocol for chest pain evaluation (120 kV, 320 mAs/rot) with different simulated heart rates (HRs). The dose of a standard chest CT examination (120 kV, 160 mAs) was also measured. Effective dose of the chest pain protocol was 19.3/21.9 mSv (male/female, HR 60), 17.9/20.4 mSv (male/female, HR 80) and 14.7/16.7 mSv (male/female, HR 100). Effective dose of a standard chest examination was 6.3 mSv (males) and 7.2 mSv (females). Radiation dose of the chest pain protocol increases significantly with a lower heart rate for both males (p = 0.040) and females (p = 0.044). The average radiation dose of a standard chest CT examination is about 36.5% that of a CT examination performed for chest pain. Using DSCT, the evaluated chest pain protocol revealed a higher radiation exposure compared with standard chest CT. Furthermore, HRs markedly influenced the dose exposure when using the ECG-gated chest pain protocol. (orig.)

Influence of lead apron shielding on absorbed doses from cone-beam computed tomography

International Nuclear Information System (INIS)

Rottke, Dennis; Andersson, Jonas; Ejima, Ken-Ichiro; Sawada, Kunihiko; Schulze, Dirk

2017-01-01

The aim of the present work was to investigate absorbed and to calculate effective doses (EDs) in cone-beam computed tomography (CBCT). The study was conducted using examination protocols with and without lead apron shielding. A full-body male RANDO"R phantom was loaded with 110 GR200A thermoluminescence dosemeter chips at 55 different sites and set up in two different CBCT systems (CS 9500"R, ProMax"R 3D). Two different protocols were performed: the phantom was set up (1) with and (2) without a lead apron. No statistically significant differences in organ and absorbed doses from regions outside the primary beam could be found when comparing results from exposures with and without lead apron shielding. Consequently, calculating the ED showed no significant differences between the examination protocols with and without lead apron shielding. For the ProMax"R 3D with shielding, the ED was 149 μSv, and for the examination protocol without shielding 148 μSv (SD = 0.31 μSv). For the CS 9500"R, the ED was 88 and 86 μSv (SD = 0.95 μSv), respectively, with and without lead apron shielding. The results revealed no statistically significant differences in the absorbed doses between examination with and without lead apron shielding, especially in organs outside the primary beam. (authors)

X-ray protective clothing. Does DIN 6857-1 allow an objective comparison between lead-free and lead-composite materials?

International Nuclear Information System (INIS)

Eder, H.; Schlattl, H.; Hoeschen, C.

2010-01-01

Purpose: The validity of DIN 6857-1 to establish lead equivalence for protective clothing is evaluated by Monte Carlo simulations and measurements. Materials and Methods: Commercially available protective clothing made of lead, lead-free and lead-composite materials has been tested regarding its protective efficacy. The analysis has been performed on the one hand in accordance with the test conditions described in the manufacturing standard DIN EN 61331-3 and on the other hand following the new DIN 6857-1 standard. Additionally, measurements have been carried out under simulated patient conditions by using an Alderson-Rando phantom. Results: Following DIN EN 61331-3, the lead-free protective clothing achieved the required protective efficacy only at a restricted tube-voltage range. The test according to DIN 6857-1 showed that the protective criteria were fulfilled only by one lead-composite apron, but not by the three lead-free aprons examined. Thus, in order to guarantee the same protection as lead between 50 and 120 kV, the conditions of DIN 6857-1 must be fulfilled. Conclusion: A modification of DIN EN 61331-3 to account for secondary radiation is strongly advised in the case of lead-free materials. In summary, most of the protective lead-free aprons in use should be used with care, particularly for examinations with a high dose. (orig.)

Investigation of conformal and intensity-modulated radiation therapy techniques to determine the absorbed fetal dose in pregnant patients with breast cancer

Energy Technology Data Exchange (ETDEWEB)

Öğretici, Akın, E-mail: akinogretici@gmail.com; Akbaş, Uğur; Köksal, Canan; Bilge, Hatice

2016-07-01

The aim of this research was to investigate the fetal doses of pregnant patients undergoing conformal radiotherapy or intensity-modulated radiation therapy (IMRT) for breast cancers. An Alderson Rando phantom was chosen to simulate a pregnant patient with breast cancer who is receiving radiation therapy. This phantom was irradiated using the Varian Clinac DBX 600 system (Varian Medical System, Palo Alto, CA) linear accelerator, according to the standard treatment plans of both three-dimensional conformal radiation therapy (3-D CRT) and IMRT techniques. Thermoluminescent dosimeters were used to measure the irradiated phantom's virtually designated uterus area. Thermoluminescent dosimeter measurements (in the phantom) revealed that the mean cumulative fetal dose for 3-D CRT is 1.39 cGy and for IMRT it is 8.48 cGy, for a pregnant breast cancer woman who received radiation treatment of 50 Gy. The fetal dose was confirmed to increase by 70% for 3-D CRT and 40% for IMRT, if it is closer to the irradiated field by 5 cm. The mean fetal dose from 3-D CRT is 1.39 cGy and IMRT is 8.48 cGy, consistent with theoretic calculations. The IMRT technique causes the fetal dose to be 5 times more than that of 3-D CRT. Theoretic knowledge concerning the increase in the peripheral doses as the measurements approached the beam was also practically proven.

A simple calculation for the determination of organ or tissue dose from medical x-ray diagnosis for stomach and chest

International Nuclear Information System (INIS)

Nishizawa, Kanae

1984-01-01

A simple calculation method has been developed to determine the organ or tissue doses of patients for typical X-ray diagnoses. The absorbed doses related to radiation-induced stochastic effects were calculated based on the dosimetric parameters experimentally determined and technical parameters for X-ray diagnostic examinations. The present method is principally based on the TRA method for the beam therapy. The dosimetric parameters such as percentage depth-dose curves and isodose curves were measured with ionization chambers in the MixDP phantom. The distance from the incident surface of X-ray beams to the organ or tissue of interest was determined with a mathematical phantom, which was the modified version of the MIRD phantom for the average Japanese adult. The absorbed doses were determined with a simple table look-up method using a computer. The calculated doses were tabulated for various technical parameters of stomach and chest X-ray examinations. The present calculation was applied to the Rando woman phantom to compare with the phantom measurements. The calculated values agree with the experimental doses within 20% discrepancy. It was concluded that the present calculation method can determine organ or tissue doses very simply for various X-ray examinations and that it was valuable for the estimation of population doses and risks from X-ray diagnoses. (author)

Effective radiation dose from semicoronal CT of the sacroiliac joints in comparison with axial CT and conventional radiography

Energy Technology Data Exchange (ETDEWEB)

Jurik, Anne Grethe; Boecker Puhakka, Katriina [Department of Radiology R, Aarhus University Hospital, Aarhus Kommunehospital, Noerrebrogade 44, 8000 Aarhus C (Denmark); Hansen, Jolanta [Department of Medical Physics, Aarhus University Hospital, Aarhus Kommunehospital, Noerrebrogade 44, 8000 Aarhus C (Denmark)

2002-11-01

The aim of this study was to evaluate the radiation dose given by semicoronal CT of the sacroiliac joints (SIJs) in comparison with axial CT and conventional radiography. The total effective radiation doses given by serial contiguous semicoronal and axial CT, using 5-mm slices, 120 kV and 330 mAs, were determined by measurement of organ doses using an anthropomorphic Rando Alderson phantom paced with thermoluminescence dosimeters. The doses given by conventional antero-posterior (AP) and oblique projections of the SIJs were determined similarly. In a female the total effective dose by semicoronal CT was found to be more than six times lower than by axial CT and 2.5 times lower than the dose use to obtain a conventional AP radiograph, the values being 102, 678, and 255 {mu}Sv, respectively. The effective dose by semicoronal CT was only a little higher than the dose given to obtain two oblique radiographs. In a male with lead protection of the gonads the dose by semicoronal CT was four times lower than by axial CT, but higher than by conventional radiography. In conclusion, the effective dose by semicoronal CT of the SIJs is lower than by axial CT, and in females a semicoronal CT implies a lower effective radiation dose that used to obtain an AP radiograph. (orig.)

O desenvolvimento do modo narrativo de pensamento em pré-adolescentes

Directory of Open Access Journals (Sweden)

Lídia Suzana Rocha de Macedo

2017-01-01

Full Text Available El presente estudio investiga la comprensión de niños acerca de la covariación de los términos de la división sin la presencia explicita del número. El objetivo es verificar si hay diferencia en el desempeño cuando se incluyen cantidades que son expresadas por números o por códigos relativos. Participaron 72 estudiantes pertenecientes a una escuela particular de Recife (Brasil, distribuidos en tres grupos: Prescolar (Infantil 3, primero y segundo año. Estos grupos resolvieron 12 problemas de división conside- rando dos condiciones: C1 (con la presencia explicita del número y C2 (con la presen- cia del código relativo. Los resultados revelan que los niños de 1º y 2º año presentan mejor desempeño cuando los problemas son presentados en la C2, a diferencia de los niños de prescolar (Infantil 3 que presentan mejor desempeño en la C1. Estos resul - tados apuntan a que el uso del código relativo parece ayudar a los niños en los años iniciales, principalmente a aquellos que están iniciando el aprendizaje de operaciones a pensar sobre las relaciones presentes en los enunciados de los problemas.

Radiation dose of digital tomosynthesis for sinonasal examination: comparison with multi-detector CT.

Science.gov (United States)

Machida, Haruhiko; Yuhara, Toshiyuki; Tamura, Mieko; Numano, Tomokazu; Abe, Shinji; Sabol, John M; Suzuki, Shigeru; Ueno, Eiko

2012-06-01

Using an anthropomorphic phantom, we have investigated the feasibility of digital tomosynthesis (DT) of flat-panel detector (FPD) radiography to reduce radiation dose for sinonasal examination compared to multi-detector computed tomography (MDCT). A female Rando phantom was scanned covering frontal to maxillary sinus using the clinically routine protocol by both 64-detector CT (120 kV, 200 mAs, and 1.375-pitch) and DT radiography (80 kV, 1.0 mAs per projection, 60 projections, 40° sweep, and posterior-anterior projections). Glass dosimeters were used to measure the radiation dose to internal organs including the thyroid gland, brain, submandibular gland, and the surface dose at various sites including the eyes during those scans. We compared the radiation dose to those anatomies between both modalities. In DT radiography, the doses of the thyroid gland, brain, submandibular gland, skin, and eyes were 230 ± 90 μGy, 1770 ± 560 μGy, 1400 ± 80 μGy, 1160 ± 2100 μGy, and 112 ± 6 μGy, respectively. These doses were reduced to approximately 1/5, 1/8, 1/12, 1/17, and 1/290 of the respective MDCT dose. For sinonasal examinations, DT radiography enables dramatic reduction in radiation exposure and dose to the head and neck region, particularly to the lens of the eye. Copyright © 2011 Elsevier Ireland Ltd. All rights reserved.

Evaluation of radiation exposure with singleslice- and a multislice-spiral CT system (a phantom study)

International Nuclear Information System (INIS)

Giacomuzzi, S.M.; Rieger, M.; Lottersberger, C.; Peer, S.; Peer, R.; Buchberger, W.; Bale, R.; Mallouhi, A.; Jaschke, W.; Torbica, P.; Perkmann, R.

2001-01-01

The purpose of study was to compare patient dose applying singleslice- and multislice-spiral CT. Methods: The examinations were performed with a singleslice-spiral CT (Highspeed Advantage; GE Medical Systems; Milwaukee, USA) and with a multislice CT systems (LightSpeed QX/i GE Medical Systems; Milwaukee, USA). For the determination of the radiation exposure (absorbed dose) a selection of most executed protocols (thorax-helical, abdomen-helical, petrous bone-axial, head-axial) were simulated using an Alderson Rando Phantom. The dose was determined by means of lithiumfluorid-thermoluminescence dosimeters (TLD-GR 200). Results: For thorax and abdomen protocols higher energy dose values could be found using a multislice CT. On the average the energy dose values were increased by 2.6 on an average in relation to single slice spiral CT. The energy dose values of the multisclice CT using head protocols could be reduced by 30% in relation to single slice spiral CT due to suitable parameter selections. The energy dose applying a petrous bone protocol resulted in an average increase by a factor 1.5 using a multislice CT. Conclusion: Using the new multislice CT technique protocol strategies must be optimized regarding the patient doses. Users can operate critically in the sense of the radiation protection only if they are aware of the occurring dose amounts to the patient. (orig.) [de

Methodology for converting CT medical images to MCNP input using the Scan2MCNP system

International Nuclear Information System (INIS)

Boia, L.S.; Silva, A.X.; Cardoso, S.C.; Castro, R.C.

2009-01-01

This paper develops a methodology for the application software Scan2MCNP, which converts medical images DICOM (Digital Imaging and Communications in Medicine) for MCNP input file. The Scan2MCNP handles, processes and executes the medical images generated by CT equipment, allowing the user to perform the selection and parameterization of the study area in question (tissues and organs). The details of these worked in medical imaging software, therefore, will be converted to equity to the process of language analysis of MCNP radiation transport, through the generation of a code input file. With this file, it is possible to simulate any situation/problem of the type and level of radiation to the proposed treatment chosen by the medical staff responsible for the patient. Within a computational process oriented, the Scan2MCNP can contribute along with other software that has been used recently in the area of medical physics, to improve the levels of quality and precision of radiotherapy treatments. In this work, medical images DICOM of the Anthropomorphic Rando Phantom were used in the process of analysis and development of computer software Scan2MCNP. However, it emphasized that the software is successful in certain situations, depending upon a number of auxiliary procedures and software that can help in the solution of certain problems in the natural radiation treatment or express agility by the team of medical physics. (author)

Reduction of patient dose delivered by CHR diagnostic x-ray examinations

International Nuclear Information System (INIS)

Evans, R.D.; Schlenker, R.A.

1978-01-01

Three changes in technique have been made which reduce the x-ray dose delivered by diagnostic examinations of patients of the Center for Human Radiobiology (CHR): Kodak Lanex Regular screens and Kodak Ortho G film have been substituted for DuPont Cronex Parspeed screens and DuPont Cronex 4 film for five projections in the MIT examinations; 3 mm Al added filtration is now used in place of 1 mm Al added filtration in the ANL examination; improvements in collimation for the ANL examination have been made. Use of the new screen-film combination at MIT has reduced the mean dose to the active marrow of the female RANDO phantom from 606 +- 69 mrad to 235 +- 16 mrad; it has reduced the ovary dose from 606 +- 40 mrad to 291 +- 19 mrad and has left the breast dose unchanged at 333 +- 103 mrad. The change from 1 mm Al to 3 mm Al added filtration at ANL, without changes in collimation, would reduce the mean marrow dose in the phantom from 232 +- 14 mrad to 175 +- 26 mrad, reduce the ovary dose from 243 +- 25 mrad to 162 +- 38 mrad and reduce the breast dose from 388 +- 35 mrad to 226 +- 9 mrad. The changes in collimation at ANL should reduce these doses even further but the quantitative effect has not been ascertained

Quality assurance of CT-PET alignment and image registration for radiation treatment planning

International Nuclear Information System (INIS)

Gong, S.J.; O'Keefe, G.J.; Gunawardana, D.H.

2005-01-01

A multi-layer point source phantom was first used to calibrate and verify the CT-PET system alignment. A partial whole-body Aldcrson RANDO Man Phantom (head through mid-femur) was externally and internally marked with small metal cannulas filled with 18F-FDG and then scanned with both modalities. Six series of phantom studies with different acquisition settings and scan positions were performed to reveal possible system bias and evaluate the accuracy and reliabilities of Philips Syntegra program in image alignment, coregistration and fusion. The registration error was assessed quantitatively by measuring the root-mean-square distance between the iso-centers of corresponding fiducial marker geometries in reference CT volumes and transformed CT or PET volumes. Results: Experimental data confirms the accuracy of manual, parameter, point and image-based registration using Syntegra is better than 2 mm. Comparisons between blind and cross definition of iso-centers of fiducial marks indicate that the fused CT and PET is superior to visual correlation of CT and PET side-by-side. Conclusion: In this work we demonstrate the QA procedures of Gemini image alignment and registration. Syntegra produces intrinsic and robust multi-modality image registration and fusion with careful user interaction. The registration accuracy is generally better than the spatial resolution of the PET scanner used and this appears to be sufficient for most RTP CT-PET registration procedures

Measurement of Skin Dose from Using the Treatment Immobilization Devices

International Nuclear Information System (INIS)

Je, Jae Yong; Park, Chul Woo; Noh, Kyung Suk

2009-01-01

The research was about the relation between the dorsal side dose measured by using the phantom body (Alderson Rando Phantom) and factors like contacted material of the patients, the size of the field, angle of incidence. Compared with mylar (tennis racket), the dose on 10 x 10 cm 2 field size of cotton was increased by 2% and by 8% in the case of breast board. In the case of 15 x 15 cm 2 field size, the dose was increased by 6% compared with 10 x 10 cm 2 size. The field size of 20 x 20 cm 2 resulted in 10% increase of dose, while 5 x 5 cm 2 produced 13% decrease. Compared with incident angle 0 degree, the cases for the incident angle 5 degrees had 0.4% less dose for breast board, 0.5% for tennis racket, 1.1% for cotton. The cases for the incident angle 10 degrees had 1.5% less dose for breast board, 1.9% for tennis racket, 2.6% for cotton. For the incident angle 15 degrees, breast board, tennis racket, cotton caused decrease of dose by 3.9%, 2.6%, 3.86% respectively. Resultantly carbon material can cause more skin dose in treatment field. By the results of this study, we recommend that one should avoid the contact between the carbon material and skin.

Does multicomponent physical exercise with simultaneous cognitive training boost cognitive performance in older adults? A 6-month rando­mized controlled trial with a 1-year follow-up

Directory of Open Access Journals (Sweden)

Eggenberger P

2015-08-01

Full Text Available Patrick Eggenberger,1 Vera Schumacher,2,3 Marius Angst,1 Nathan Theill,4,5 Eling D de Bruin1,6,7 1Institute of Human Movement Sciences and Sport, Department of Health Sciences and Technology, ETH Zurich, 2Department of Gerontopsychology and Gerontology, 3University Research Priority Program “Dynamics of Healthy Aging”, University of Zurich, Zurich, 4Division of Psychiatry Research, University of Zurich, Schlieren, 5Center for Gerontology, University of Zurich, Zurich, Switzerland; 6CAPHRI School for Public Health and Primary Care, Department of Epidemiology, 7Centre for Evidence Based Physiotherapy, Maastricht University, Maastricht, the Netherlands Background: Cognitive impairment is a health problem that concerns almost every second elderly person. Physical and cognitive training have differential positive effects on cognition, but have been rarely applied in combination. This study evaluates synergistic effects of multicomponent physical exercise complemented with novel simultaneous cognitive training on cognition in older adults. We hypothesized that simultaneous cognitive–physical components would add training specific cognitive benefits compared to exclusively physical training.Methods: Seniors, older than 70 years, without cognitive impairment, were randomly assigned to either: 1 virtual reality video game dancing (DANCE, 2 treadmill walking with simultaneous verbal memory training (MEMORY, or 3 treadmill walking (PHYS. Each program was complemented with strength and balance exercises. Two 1-hour training sessions per week over 6 months were applied. Cognitive performance was assessed at baseline, after 3 and 6 months, and at 1-year follow-up. Multiple regression analyses with planned comparisons were calculated.Results: Eighty-nine participants were randomized to the three groups initially, 71 completed the training, while 47 were available at 1-year follow-up. Advantages of the simultaneous cognitive–physical programs were found in two dimensions of executive function. “Shifting attention” showed a time×intervention interaction in favor of DANCE/MEMORY versus PHYS (F[2, 68] =1.95, trend P=0.075, r=0.17; and “working memory” showed a time×intervention interaction in favor of DANCE versus MEMORY (F[1, 136] =2.71, trend P=0.051, R2=0.006. Performance improvements in executive functions, long-term visual memory (episodic memory, and processing speed were maintained at follow-up in all groups.Conclusion: Particular executive functions benefit from simultaneous cognitive–physical training compared to exclusively physical multicomponent training. Cognitive–physical training programs may counteract widespread cognitive impairments in the elderly. Keywords: elderly, executive function, transfer, cognitive impairment, dance, video game

Investigation on the Characteristics of Pellet Ablation in a Toroidal Plasma

Science.gov (United States)

Sato, K. N.; Sakakita, H.; Fujita, H.

2003-06-01

Characteristics of a cloud ablated from an ice pellet has been investigated in detail in the JIPP T-IIU tokamak plasma by utilizing a new scheme of pellet injection system, "the injection-angle controllable system". A long "helical tail" of ablation light has been observed using CCD cameras and a high speed framing photograph in the case of on-axis and off-axis injection with the injection angle smaller than a certain value. The direction of the helical tail is found to be independent to that of the total magnetic field lines of the torus. From the experiments with the combination of two toroildal filed directions and two plasma current directions, it is considered that the tail seems to rotate, in most cases, to the electron diamagnetic direction poloidally, and to the opposite to the plasma current direction toroidally. Consideration on various cross sections including charge exchange, ionization and elastic collisions leads us to the conclusion that the tail-shaped phenomena may come from the situation of charge exchange equilibrium of hydrogen ions and neutrals at extremely high density regime in the cloud. The relation of ablation behavior with plasma potential and rotation has also been studied. Potential measurements of pellet-injected plasmas using heavy ion beam probe (HIBP) method were carried out for the first time. In the case of an injection angle to be anti-parallel to the electron diamagnetic direction in the poloidal plane, the result shows that the direction of potential change is negative, and consequently the potential after the injection should be negative because it has been measured to be negative in usual ohmic plasmas without pellet injection. Thus, the direction of the "tail" structure seems to be consistent to that of the plasma potential measured, if it is considered that tail structure may be caused by the effect of the plasma potential and the rotation.

Investigation on the Characteristics of Pellet Ablation in a Toroidal Plasma

International Nuclear Information System (INIS)

Sato, K.N.; Sakakita, H.; Fujita, H.

2003-01-01

Characteristics of a cloud ablated from an ice pellet has been investigated in detail in the JIPP T-IIU tokamak plasma by utilizing a new scheme of pellet injection system, 'the injection-angle controllable system'. A long 'helical tail' of ablation light has been observed using CCD cameras and a high speed framing photograph in the case of on-axis and off-axis injection with the injection angle smaller than a certain value. The direction of the helical tail is found to be independent to that of the total magnetic field lines of the torus. From the experiments with the combination of two toroidal filed directions and two plasma current directions, it is considered that the tail seems to rotate, in most cases, to the electron diamagnetic direction poloidally, and to the opposite to the plasma current direction toroidally. Consideration on various cross sections including charge exchange, ionization and elastic collisions leads us to the conclusion that the tail-shaped phenomena may come from the situation of charge exchange equilibrium of hydrogen ions and neutrals at extremely high density regime in the cloud. The relation of ablation behavior with plasma potential and rotation has also been studied. Potential measurements of pellet-injected plasmas using heavy ion beam probe (HIBP) method were carried out for the first time. In the case of an injection angle to be anti-parallel to the electron diamagnetic direction in the poloidal plane, the result shows that the direction of potential change is negative, and consequently the potential after the injection should be negative because it has been measured to be negative in usual ohmic plasmas without pellet injection. Thus, the direction of the 'tail' structure seems to be consistent to that of the plasma potential measured, if it is considered that tail structure may be caused by the effect of the plasma potential and the rotation

Fotorealismi pool sajandit ehk ühe "-ismi" mitu lainet = Half a century of photorealism, or several waves of one "-ism" / Tiiu Parbus

Index Scriptorium Estoniae

Parbus, Tiiu, 1989-

2016-01-01

Rahvusvaheline näitus "Fotorealism. 50 aastat hüperrealistlikku maali" Kumus eksponeerib algupärase fotorealismi superstaare. Koostanud Tübingeni Kultuurivahetuse Instituut, kuraator Otto Letze. Eesti hüperrealismi seoseid Ameerika algupärandiga

X-ray CT high-density artefact suppression in cryosurgery

International Nuclear Information System (INIS)

Wei Jikun; Sandison, George A; Chen Laigao; Liang Yun; Xu, Lisa X

2002-01-01

Advantages of x-ray CT for imaging guidance of cryosurgery include 3D visualization of frozen and unfrozen tissue and calibration of temperature in the tissue water-ice interface (0-10 deg. C) to Hounsfield units. However, use of x-ray CT images and their thermal calibration can be compromised by the cryoprobes generating high-density streak artefacts. A new subtraction technique for artefact suppression is proposed and tested in prostate cryosurgery simulations. By subtracting the measured CT x-ray projection profile without cryoprobes from the profile with cryoprobes plus iceballs, one obtains the combined profile of the cryoprobes and a low value background. Polynomial interpolation to obtain the background profile allows its addition to the original profile without probes. The result may then be fed to a conventional filtered back-projection routine to reconstruct the probe-free image. Finally the cryoprobe pixels in the originally constructed image with probes and iceballs are added back to the probe-free image to get the final artefact-suppressed image. The major advantage of this subtraction technique is that it can successfully suppress the high-density artefacts in bone-abundant body regions such as the pelvis. X-ray CT images of cryoprobe arrays in a homogeneous gelatin phantom and the pelvic region of an anthropomorphic Rando phantom containing a human skeleton were generated. After suppression, cryoprobe metal artefact streaks are reduced and visualization of the positions and dimensions of the cryoprobes are well preserved. (note)

Patient dose, gray level and exposure index with a computed radiography system

Science.gov (United States)

Silva, T. R.; Yoshimura, E. M.

2014-02-01

Computed radiography (CR) is gradually replacing conventional screen-film system in Brazil. To assess image quality, manufactures provide the calculation of an exposure index through the acquisition software of the CR system. The objective of this study is to verify if the CR image can be used as an evaluator of patient absorbed dose too, through a relationship between the entrance skin dose and the exposure index or the gray level values obtained in the image. The CR system used for this study (Agfa model 30-X with NX acquisition software) calculates an exposure index called Log of the Median (lgM), related to the absorbed dose to the IP. The lgM value depends on the average gray level (called Scan Average Level (SAL)) of the segmented pixel value histogram of the whole image. A Rando male phantom was used to simulate a human body (chest and head), and was irradiated with an X-ray equipment, using usual radiologic techniques for chest exams. Thermoluminescent dosimeters (LiF, TLD100) were used to evaluate entrance skin dose and exit dose. The results showed a logarithm relation between entrance dose and SAL in the image center, regardless of the beam filtration. The exposure index varies linearly with the entrance dose, but the angular coefficient is beam quality dependent. We conclude that, with an adequate calibration, the CR system can be used to evaluate the patient absorbed dose.

Influence of lead apron shielding on absorbed doses from panoramic radiography.

Science.gov (United States)

Rottke, D; Grossekettler, L; Sawada, K; Poxleitner, P; Schulze, D

2013-01-01

This study investigated the absorbed doses in a full anthropomorphic body phantom from two different panoramic radiography devices, performing protocols with and without applying a lead apron. A RANDO(®) full body phantom (Alderson Research Laboratories Inc., Stamford, CT) was equipped with 110 thermoluminescent dosemeters at 55 different sites and set up in two different panoramic radiography devices [SCANORA(®) three-dimensional (3D) (SOREDEX, Tuusula, Finland) and ProMax(®) 3D (Planmeca, Helsinki, Finland)] and exposed. Two different protocols were performed in the two devices. The first protocol was performed without any lead shielding, whereas the phantom was equipped with a standard adult lead apron for the second protocol. A two-tailed paired samples t-test for the SCANORA 3D revealed that there is no difference between the protocol using lead apron shielding (m = 87.99, s = 102.98) and the protocol without shielding (m = 87.34, s = 107.49), t(54) = -0.313, p > 0.05. The same test for the ProMax 3D showed that there is also no difference between the protocol using shielding (m = 106.48, s = 117.38) and the protocol without shielding (m = 107.75, s = 114,36), t(54) = 0.938, p > 0.05. In conclusion, the results of this study showed no statistically significant differences between a panoramic radiography with or without the use of lead apron shielding.

An evaluation of in-plane shields during thoracic CT.

Science.gov (United States)

Foley, S J; McEntee, M F; Rainford, L A

2013-08-01

The object of this study was to compare organ dose and image quality effects of using bismuth and barium vinyl in-plane shields with standard and low tube current thoracic CT protocols. A RANDO phantom was scanned using a 64-slice CT scanner and three different thoracic protocols. Thermoluminescent dosemeters were positioned in six locations to record surface and absorbed breast and lung doses. Image quality was assessed quantitatively using region of interest measurements. Scanning was repeated using bismuth and barium vinyl in-plane shields to cover the breasts and the results were compared with standard and reduced dose protocols. Dose reductions were most evident in the breast, skin and anterior lung when shielding was used, with mean reductions of 34, 33 and 10 % for bismuth and 23, 18 and 11 % for barium, respectively. Bismuth was associated with significant increases in both noise and CT attenuation values for all the three protocols, especially anteriorly and centrally. Barium shielding had a reduced impact on image quality. Reducing the overall tube current reduced doses in all the locations by 20-27 % with similar increases in noise as shielding, without impacting on attenuation values. Reducing the overall tube current best optimises dose with minimal image quality impact. In-plane shields increase noise and attenuation values, while reducing anterior organ doses primarily. Shielding remains a useful optimisation tool in CT and barium is an effective alternative to bismuth especially when image quality is of concern.

Dosimetry of cone beam computed tomography scanning for diagnosis and planning in implant dentistry

International Nuclear Information System (INIS)

Santos Pinto de A, E. L.; Manzi, F. R.; Goncalves Z, E.; Nogueira, M. S.; Fernandes Z, M. A.

2015-10-01

Full text: The radiation dose and estimate the radiation induced risk of cancer and morpho functional alterations according to BEIR VII (2006) and recommendations of the ICRP 103 (2007) were measured in cone beam computed tomography (CBCT) scanning (Tc Kodak 9000C 3D) in different oral and maxillofacial regions for diagnosis and planning in implant dentistry for each examination protocol: jaw full, maxilla full and jaw and maxilla full associated. Thermoluminescent dosimeters (TLD- 100 H) were placed in an Alderson-Rando in regions corresponding to the crystalline, parotid, submandibular and thyroid glands and ovaries. The highest values for entrance skin dose were observed in the region of the parotid and submandibular glands, 9.612 mGy to 7.912 mGy and 8.818 mGy to 0.483 mGy, respectively. All examination protocols presented on the right and left sides in the region of the submandibular gland the highest values for absorbed dose (D). In the jaw full exam the thyroid glands on both sides presented highest dose values than maxilla full exam. This study allowed measuring the entrance skin dose and the absorbed dose (D) highlighting a dosimetric preponderance to the salivary glands. With danger of to radiation that induces cancer risk was observed that the age group most likely to have to risk of cancer was 20 years, compared to 30, 40, 50, 60,70 and 80 years. (Author)

An investigation into the use of CMOS active pixel technology in image-guided radiotherapy

International Nuclear Information System (INIS)

Osmond, J P F; Holland, A D; Harris, E J; Ott, R J; Evans, P M; Clark, A T

2008-01-01

The increased intelligence, read-out speed, radiation hardness and potential large size of CMOS active pixel sensors (APS) gives them a potential advantage over systems currently used for verification of complex treatments such as IMRT and the tracking of moving tumours. The aim of this work is to investigate the feasibility of using an APS-based system to image the megavoltage treatment beam produced by a linear accelerator (Linac), and to demonstrate the logic which may ultimately be incorporated into future sensor and FPGA design to evaluate treatment and track motion. A CMOS APS was developed by the MI 3 consortium and incorporated into a megavoltage imaging system using the standard lens and mirror configuration employed in camera-based EPIDs. The ability to resolve anatomical structure was evaluated using an Alderson RANDO head phantom, resolution evaluated using a quality control (QC3) phantom and contrast using an in-house developed phantom. A complex intensity-modulated radiotherapy (IMRT) treatment was imaged and two algorithms were used to determine the field-area and delivered dose, and the position of multi-leaf collimator (MLC) leaves off-line. Results were compared with prediction from the prescription and found to agree within a single image frame time for dose delivery and 0.02-0.03 cm for the position of collimator leaves. Such a system therefore shows potential as the basis for an on-line verification system capable of treatment verification and monitoring patient motion

Effective dose for patient in multimode panoramic radiography

International Nuclear Information System (INIS)

Yasaki, Shiro; Daibo, Motoji

1999-01-01

In recent years, multimode panoramic radiography has had various functions, such as the auto exposure function, auto focus function (auto function), TMJ radiography and tomogram radiography functions. The purpose of this study was to estimate the effective dose for patients in each mode of the new multimode panoramic radiography (J. MORITA MFG. CORP. Dental Panorama X-ray Apparatus: Veraview Scope X 600). The absorbed doses in important organs involved in the causation of stochastic effects were measured by a thermoluminescent dosimeter using RANDO phantom. The effective doses were calculated using modified tissue weighting factors recommended by the International Commission on Radiological Protection (ICRP) in 1999. The mean field size over skin in typical panoramic and tomographic examinations was about 3% and 0.4% of the total body surface area of 15000 cm 2 . Assuming that the incidence of skin cancer is proportional to the area of skin exposed to ionizing radiation, the tissue weighting factor of skin can be estimated to be about 0.0003 and 0.00004. The estimate in effective dose was lower (5.3 μSv) in the panoramic auto function mode (an average exposure condition of 69 kV 7 mA) than that (6.5-13.8 μSv) in the linear tomogram modes. Since the linear tomogram mode requires a scout view, such as standard panoramic radiography, the dose in the linear tomogram mode becomes higher than other modes. A percentage of gonad doses in effective doses was negligible. (author)

The use of the eyes protection for dose reduction in CT scans of skull

International Nuclear Information System (INIS)

Mourao, Arnaldo P.; Silva, Teogenes A.; Alonso, Thessa C.

2013-01-01

The technique for imaging the brain scans of the skull by computed tomography (CT) scanning is the volume bounded by the foramen magnum and the apex of the skull. The lenses are radiosensitive tissues and CT scans of the head deposited significant doses on them, since they are in the region of incidence of the primary beam of X-rays. Thus, the variation of the dose deposited in the crystalline skull CT scans for diagnostic imaging of the brain was investigated. Cranial scans were performed using the acquisition protocol routine with or without the use of bismuth to shield the eyes. To carry out the scans we used a male anthropomorphic phantom, Alderson Rando model and dosimeters (TLD-100) were used to record the doses. These TLDs were used to record specific doses internally to the phantom in specific organs (crystalline, pituitary, thyroid, spinal cord and breasts). The scans were performed on a GE machine, model 64 Discovery channels. The data obtained allowed to observe the variation of dose in organs. The highest dose was recorded in the lens (26,18 mGy), followed by spinal cord (17,79 mGy). Comparing the doses of the two scans it was significant variation in the crystal. Scan using bismuth shield generated smaller doses in the eyes and in the eyes occurred the higher dose reduction, about 37%. The results may contribute to spread a suitable procedure for the optimization of CT scans of the skull

Assessment of dose in thyroid and salivary glands in dental radiology using thermoluminescent dosimetry

International Nuclear Information System (INIS)

Mantuano, Natalia de O.; Silva, Ademir X. da; Correa, Samanda C.A.

2011-01-01

Radiobiological and epidemiological studies have provided evidence of risk of salivary and thyroid glands tumors incidence associated with oral radiology. Based on these studies, the tissue weighting factors were reviewed by the International Commission on Radiological Protection (ICRP) in 2007. The main objective of the present work is to estimate the absorbed dose on thyroid and salivary glands (parotid, submandibular and sublingual), during a complete periapical examination. The complete periapical examination was simulated using a Spectro 70X Seletronic X-ray dental equipment on an Alderson Rando phantom with Harshaw LiF:Mg,Ti thermoluminescent dosemeters (TLD100). A PTW DIADOS dosimetric system was used for calibration. The TLD100 were inserted into the phantom slices corresponding to the organs of interest. During a complete periapical examination, the highest evaluated mean absorbed dose was 4.9 mGy in the right submandibular gland and the lowest one of 1.5 mGy in the left thyroid lobe. Entrance surface doses ranged from 2.1 to 2.6 mGy, measured, respectively, for the techniques of upper left molar and lower right molar. When compared with the diagnostic reference levels (DRL), the entrance surface doses values were lower than the DRLs recommended in Brazilian current legislation. However, the dosimetric results show the need of optimization for complete periapical examination to minimize patient exposure. Measurements were performed without the use of thyroid protectors. The use of this device is certainly an easy and simple method of dose reduction. (author)

Fabrication of malleable three-dimensional-printed customized bolus using three-dimensional scanner.

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Jae Won Park

Full Text Available A three-dimensional (3D-printed customized bolus (3D bolus can be used for radiotherapy application to irregular surfaces. However, bolus fabrication based on computed tomography (CT scans is complicated and also delivers unwanted irradiation. Consequently, we fabricated a bolus using a 3D scanner and evaluated its efficacy. The head of an Alderson Rando phantom was scanned with a 3D scanner. The 3D surface data were exported and reconstructed with Geomagic Design X software. A 3D bolus of 5-mm thickness designed to fit onto the nose was printed with the use of rubber-like printing material, and a radiotherapy plan was developed. We successfully fabricated the customized 3D bolus, and further, a CT simulation indicated an acceptable fit of the 3D bolus to the nose. There was no air gap between the bolus and the phantom surface. The percent depth dose (PDD curve of the phantom with the 3D bolus showed an enhanced surface dose when compared with that of the phantom without the bolus. The PDD of the 3D bolus was comparable with that of a commercial superflab bolus. The radiotherapy plan considering the 3D bolus showed improved target coverage when compared with that without the bolus. Thus, we successfully fabricated a customized 3D bolus for an irregular surface using a 3D scanner instead of a CT scanner.

Dual-energy CT for the characterization of urinary calculi: In vitro and in vivo evaluation of a low-dose scanning protocol

International Nuclear Information System (INIS)

Thomas, C.; Patschan, O.; Nagele, U.; Stenzl, A.; Ketelsen, D.; Tsiflikas, I.; Reimann, A.; Brodoefel, H.; Claussen, C.; Kopp, A.; Heuschmid, M.; Schlemmer, H.P.; Buchgeister, M.

2009-01-01

The efficiency and radiation dose of a low-dose dual-energy (DE) CT protocol for the evaluation of urinary calculus disease were evaluated. A low-dose dual-source DE-CT renal calculi protocol (140 kV, 46 mAs; 80 kV, 210 mAs) was derived from the single-energy (SE) CT protocol used in our institution for the detection of renal calculi (120 kV, 75 mAs). An Alderson-Rando phantom was equipped with thermoluminescence dosimeters and examined by CT with both protocols. The effective doses were calculated. Fifty-one patients with suspected or known urinary calculus disease underwent DE-CT. DE analysis was performed if calculi were detected using a dedicated software tool. Results were compared to chemical analysis after invasive calculus extraction. An effective dose of 3.43 mSv (male) and 5.30 mSv (female) was measured in the phantom for the DE protocol (vs. 3.17/4.57 mSv for the SE protocol). Urinary calculi were found in 34 patients; in 28 patients, calculi were removed and analyzed (23 patients with calcified calculi, three with uric acid calculi, one with 2,8-dihyxdroxyadenine-calculi, one patient with a mixed struvite calculus). DE analysis was able to distinguish between calcified and non-calcified calculi in all cases. In conclusion, dual-energy urinary calculus analysis is effective also with a low-dose protocol. The protocol tested in this study reliably identified calcified urinary calculi in vivo. (orig.)

Dual-energy CT for the characterization of urinary calculi: In vitro and in vivo evaluation of a low-dose scanning protocol.

Science.gov (United States)

Thomas, C; Patschan, O; Ketelsen, D; Tsiflikas, I; Reimann, A; Brodoefel, H; Buchgeister, M; Nagele, U; Stenzl, A; Claussen, C; Kopp, A; Heuschmid, M; Schlemmer, H-P

2009-06-01

The efficiency and radiation dose of a low-dose dual-energy (DE) CT protocol for the evaluation of urinary calculus disease were evaluated. A low-dose dual-source DE-CT renal calculi protocol (140 kV, 46 mAs; 80 kV, 210 mAs) was derived from the single-energy (SE) CT protocol used in our institution for the detection of renal calculi (120 kV, 75 mAs). An Alderson-Rando phantom was equipped with thermoluminescence dosimeters and examined by CT with both protocols. The effective doses were calculated. Fifty-one patients with suspected or known urinary calculus disease underwent DE-CT. DE analysis was performed if calculi were detected using a dedicated software tool. Results were compared to chemical analysis after invasive calculus extraction. An effective dose of 3.43 mSv (male) and 5.30 mSv (female) was measured in the phantom for the DE protocol (vs. 3.17/4.57 mSv for the SE protocol). Urinary calculi were found in 34 patients; in 28 patients, calculi were removed and analyzed (23 patients with calcified calculi, three with uric acid calculi, one with 2,8-dihyxdroxyadenine-calculi, one patient with a mixed struvite calculus). DE analysis was able to distinguish between calcified and non-calcified calculi in all cases. In conclusion, dual-energy urinary calculus analysis is effective also with a low-dose protocol. The protocol tested in this study reliably identified calcified urinary calculi in vivo.

Dual-energy CT for the characterization of urinary calculi: In vitro and in vivo evaluation of a low-dose scanning protocol

Energy Technology Data Exchange (ETDEWEB)

Thomas, C. [University of Tuebingen, Department of Diagnostic and Interventional Radiology, Tuebingen (Germany); Department of Diagnostic and Interventional Radiology, Tuebingen (Germany); Patschan, O.; Nagele, U.; Stenzl, A. [University of Tuebingen, Department of Urology, Tuebingen (Germany); Ketelsen, D.; Tsiflikas, I.; Reimann, A.; Brodoefel, H.; Claussen, C.; Kopp, A.; Heuschmid, M.; Schlemmer, H.P. [University of Tuebingen, Department of Diagnostic and Interventional Radiology, Tuebingen (Germany); Buchgeister, M. [University of Tuebingen, Medical Physics, Department of Radiation Oncology, Tuebingen (Germany)

2009-06-15

The efficiency and radiation dose of a low-dose dual-energy (DE) CT protocol for the evaluation of urinary calculus disease were evaluated. A low-dose dual-source DE-CT renal calculi protocol (140 kV, 46 mAs; 80 kV, 210 mAs) was derived from the single-energy (SE) CT protocol used in our institution for the detection of renal calculi (120 kV, 75 mAs). An Alderson-Rando phantom was equipped with thermoluminescence dosimeters and examined by CT with both protocols. The effective doses were calculated. Fifty-one patients with suspected or known urinary calculus disease underwent DE-CT. DE analysis was performed if calculi were detected using a dedicated software tool. Results were compared to chemical analysis after invasive calculus extraction. An effective dose of 3.43 mSv (male) and 5.30 mSv (female) was measured in the phantom for the DE protocol (vs. 3.17/4.57 mSv for the SE protocol). Urinary calculi were found in 34 patients; in 28 patients, calculi were removed and analyzed (23 patients with calcified calculi, three with uric acid calculi, one with 2,8-dihyxdroxyadenine-calculi, one patient with a mixed struvite calculus). DE analysis was able to distinguish between calcified and non-calcified calculi in all cases. In conclusion, dual-energy urinary calculus analysis is effective also with a low-dose protocol. The protocol tested in this study reliably identified calcified urinary calculi in vivo. (orig.)

Comparison between effective radiation dose of CBCT and MSCT scanners for dentomaxillofacial applications

International Nuclear Information System (INIS)

Loubele, M.; Bogaerts, R.; Van Dijck, E.; Pauwels, R.; Vanheusden, S.; Suetens, P.; Marchal, G.

2009-01-01

Objectives: To compare the effective dose levels of cone beam computed tomography (CBCT) for maxillofacial applications with those of multi-slice computed tomography (MSCT). Study design: The effective doses of 3 CBCT scanners were estimated (Accuitomo 3D, i-CAT, and NewTom 3G) and compared to the dose levels for corresponding image acquisition protocols for 3 MSCT scanners (Somatom VolumeZoom 4, Somatom Sensation 16 and Mx8000 IDT). The effective dose was calculated using thermoluminescent dosimeters (TLDs), placed in a Rando Alderson phantom, and expressed according to the ICRP 103 (2007) guidelines (including a separate tissue weighting factor for the salivary glands, as opposed to former ICRP guidelines). Results: Effective dose values ranged from 13 to 82 μSv for CBCT and from 474 to 1160 μSv for MSCT. CBCT dose levels were the lowest for the Accuitomo 3D, and highest for the i-CAT. Conclusions: Dose levels for CBCT imaging remained far below those of clinical MSCT protocols, even when a mandibular protocol was applied for the latter, resulting in a smaller field of view compared to various CBCT protocols. Considering this wide dose span, it is of outmost importance to justify the selection of each of the aforementioned techniques, and to optimise the radiation dose while achieving a sufficient image quality. When comparing these results to previous dosimetric studies, a conversion needs to be made using the latest ICRP recommendations.

Poster - 33: Dosimetry Comparison of Prone Breast Forward and Inverse Treatment planning considering daily setup variations

Energy Technology Data Exchange (ETDEWEB)

Jiang, Runqing; Zhan, Lixin; Osei, Ernest [Grand River Regional Cancer Centre (Canada)

2016-08-15

Introduction: The purpose of this study is to investigate the effects of daily setup variations on prone breast forward field-in-field (FinF) and inverse IMRT treatment planning. Methods: Rando Phantom (Left breast) and Pixy phantom (Right breast) were built and CT scanned in prone position. The treatment planning (TP) is performed in Eclipse TP system. Forward FinF plan and inverse IMRT plan were created to satisfy the CTV coverage and OARs criteria. The daily setup variations were assumed to be 5 mm at left-right, superior-inferior, and anterior-posterior directions. The DVHs of CTV coverage and OARs were compared for both forward FinF plan and inverse IMRT plans due to 5mm setup variation. Results and Discussions: DVHs of CTV coverage had fewer variations for 5m setup variation for forward FinF and inverse IMRT plan for both phantoms. However, for the setup variations in the left-right direction, the DVH of CTV coverage of IMRT plan showed the worst variation due to lateral setup variation for both phantoms. For anterior-posterior variation, the CTV could not get full coverage when the breast chest wall is shallow; however, with the guidance of MV imaging, breast chest wall will be checked during the MV imaging setup. So the setup variations have more effects on inverse IMRT plan, compared to forward FinF plan, especially in the left-right direction. Conclusions: The Forward FinF plan was recommended clinically considering daily setup variation.