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Dissertations / Theses on the topic 'Gafchromic film dosimetry'

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1

Underwood, Ryan John. "Small field dose measurements with Gafchromic film." Thesis, Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/47675.

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Purpose: To examine the dosimetric characteristics of Gafchromic EBT3 film when measuring small fields of radiation, and compare it against other common radiation detectors. Methods and Materials: EBT3 film was placed in a solid water phantom and irradiated with 6MV photons, field sizes from 10x10cm2 down to 6x6mm2. The films were scanned with a Vidar DosimetryPRO Advantage Red scanner, and analyzed with RIT113 software. The films were also scanned at different orientations and times to quantify the discrepancies associated with scanning orientation and post-exposure darkening. The same fields
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2

Fong, Kenneth B. "Measuring the TG-43 Parameters of Iridium-192 using Monte Carlo-based Dosimetry." Digital WPI, 2019. https://digitalcommons.wpi.edu/etd-theses/1344.

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Radioactive sources used in brachytherapy must be dosimetrically characterized prior to clinical use as defined the TG-43 protocol. In our previous project, Gafchromic film dosimetry was used to experimentally obtain the anisotropy function for an M-19 iridium-192 brachytherapy seed being developed by Source Production Equipment Corp (St. Rose, LA). In this project, the Monte Carlo N-Particle Transport code (MCNP) was used to computationally obtain the full set of TG-43 parameters including the Dose Rate Constant, the Reference Dose Rate, the Radial Dose Function, and the Anisotropy Constant f
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3

Bugno, Jacob R. "Development and Implementation of a GafChromic EBT In-Vivo Personal Dosimetry System." University of Toledo Health Science Campus / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=mco1222876677.

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4

Bugno, Jacob R. "Development and implementation of a GafChromic® EBT in-vivo personal dosimetry." Connect to full text in OhioLINK ETD Center, 2008. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=mco1222876677.

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Thesis (M.S.)--University of Toledo, 2008.<br>"In partial fulfillment of the requirements for the degree of Master of Science in Biomedical Sciences." Title from title page of PDF document. Bibliography: pages 52-55.
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5

Blair, Andrew Warwick. "Skin dose measurement for interventional cardiology." Thesis, University of Canterbury. Medical Physics, 2009. http://hdl.handle.net/10092/2603.

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This thesis details the measurement and simulation of patient skin doses arising from X-ray exposure during interventional cardiology procedures. Interventional cardiology procedures can be long and complex resulting in high skin doses, to the extent that radiation burns may be produced. Twenty patients were used in the study consisting of 10 coronary angiogram and 10 coronary angioplasty procedures. Radiochromic films were used to measure skin dose directly. The Gafchromic® XR-RV2 film was chosen for its suitability for this project. The key characteristics of this film were experimentally de
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6

Xu, Ling Bin. "Commissioning of a GafChromic EBT film dosimetry protocol at the Ionizing Radiation Standards group of the National Research Council." Thesis, McGill University, 2009. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=67022.

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A GafChromic EBT film dosimetry protocol was established at the Ionizing Radiation Standards group of National Research Council. After a literature view, several aspects of EBT film dosimetry were investigated. The energy and radiation modality independence of EBT film was confirmed at the 2 % level. A calibration curve was established using a 32 point calibration curve described by a four-parameter polynomial. The darkening of EBT film is found to be significant after the first 24 hours, and up to 5 % darkening was observed over three months, which rules out the use of EBT f
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7

LUVIZOTTO, JESSICA. "Caracterização do filme radiocrômico GAFCHROMIC modelo EBT3 para uso em braquiterapia." reponame:Repositório Institucional do IPEN, 2015. http://repositorio.ipen.br:8080/xmlui/handle/123456789/26082.

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Submitted by Claudinei Pracidelli (cpracide@ipen.br) on 2016-04-08T12:52:45Z No. of bitstreams: 0<br>Made available in DSpace on 2016-04-08T12:52:45Z (GMT). No. of bitstreams: 0<br>Dissertação (Mestrado em Tecnologia Nuclear)<br>IPEN/D<br>Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP
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8

El, Barouky Jad. "Evaluation des algorithmes de calcul de dose pour les faisceaux d’électrons utilisés en radiothérapie : comparaison aux mesures par films radiochromiques." Thesis, Paris 11, 2011. http://www.theses.fr/2011PA11T002/document.

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La précision du calcul de dose est cruciale pour la qualité de la planification et de la réalisation des traitements en radiothérapie. L’objectif de ce travail était d’évaluer la qualité des algorithmes de calcul de dose des faisceaux d’électrons pour des conditions particulières proches des situations cliniques rencontrées. Une méthodologie spécifique de dosimétrie par films radiochromiques des faisceaux d’électrons a été développée et validée, y compris pour des situations difficiles avec une précision de 3.1% en dose absolue et 2.6% en dose relative. Cette technique a permis de développer d
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9

Iqeilan, Nabil. "Entrance Skin Dose Measurement Using GafChromic Dosimetry Film for Patients Undergoing Coronary Angiography (CA) and Percutaneous Transluminal Coronary Angiography (PTCA) Procedures." Thesis, Stockholm University, Medical Radiation Physics (together with KI), 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-7213.

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<p>Interventional radiological procedures often require long fluoroscopic exposure times and high levels of radiation exposure to patients, which often are higher than most radiological examinations except for computed tomography (CT) whose effective doses can be higher, and in addition to having radiation risks that are higher for both patient and medical staff. Therefore it is important to monitor and map the radiation entrance exposure to the patients, to minimize the probability of skin injury, and to detect areas of overlapping radiation fields. The aim of this thesis is to evaluate patie
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10

Morales, Johnny Estuardo. "Advances in very small x-ray field dosimetry for circular cones used in stereotactic radiosurgery." Thesis, Queensland University of Technology, 2019. https://eprints.qut.edu.au/133137/1/Johnny_Morales_Thesis.pdf.

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This project presents recent advances in small field dosimetry for radiosurgery treatments with Brainlab circular cones using 6 MV x-rays. The specific advances included: the use of a new microDiamond detector, the use of radiochromic film and OSLD detectors with an extrapolation technique, skin dose measurements and Monte Carlo simulation of radiosurgery treatments. There is limited published data on the output factor for the 4 mm circular cone. This thesis provides methodology and guidelines on how to perform such difficult measurements.
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11

McKenna, Frederick W. "Studies of cell survival curve fitting, effective doses for radiobiological evaluation in SBRT treatment techniques and the dependence of optical density growth in Gafchromic EBT film used in IMRT." Oklahoma City : [s.n.], 2009.

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12

Luvizotto, Jessica. "Caracterização do filme radiocrômico GAFCHROMIC modelo EBT3 para uso em braquiterapia." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/85/85133/tde-19012016-132131/.

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A braquiterapia é a modalidade de tratamento radioterápico que utiliza fontes radioativas seladas a uma distância curta do tumor, diminuindo o risco de aplicação de uma dose indesejável em tecidos sadios adjacentes. Para que a braquiterapia seja confiável, é necessário estabelecer um programa de práticas dosimétricas visando a determinação da dose ideal de radiação para esta prática radioterápica. Neste trabalho apresenta a aplicação de duas metodologias destinadas à dosimetria utilizando filmes radiocrômicos. Medidas experimentais foram realizadas com filmes EBT3 em objetos simuladores compos
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13

Archambault, Laurie. "Validation of XiO's electron Monte Carlo module using GafChromic EBT3 films and triple channel dosimetry." Thesis, McGill University, 2013. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=114541.

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Treatment planning in radiation therapy is based on the calculation of dose distributions, aimed at best representing the physical dose distributions. The most promising avenue towards this goal is the Monte Carlo technique, whereby particle trajectories are simulated from a modelled radiation source into a patient volume. Following the trend of incorporating fast Monte Carlo algorithms in clinical electron beam dosimetry, Elekta CMS inc. commercialized an electron Monte Carlo (eMC) module implemented in the treatment planning system XiO. The algorithm is based on the XVMC code and allows for
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14

Bekerat, Hamed. "Improving the energy response of external beam therapy (EBT) GAFCHROMIC Dosimetry films at low energies (s100keV)." Thesis, McGill University, 2013. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=114496.

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Many studies have been conducted to investigate the energy dependence of External Beam Therapy (EBT) GAFCHROMICTM dosimetry films and showed that the different film models are water equivalent down to about 100 keV and their response is energy independent down to about 100 keV. The purpose of our study is to investigate the energy dependence of commercially available films to understand the physics behind the energy variation of the films response as well as the intrinsic energy dependence and to develop a new prototype with more uniform energy response at low energies (≤100 keV). The study is
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15

Rossi, Eleonora. "Dosimetric characterization of GafChromic EBT3 films in Volumetric Modulated Arc Therapy (VMAT) radiotherapy treatments." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2017. http://amslaurea.unibo.it/14245/.

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Questo lavoro di tesi, svolto presso l'Unità Operativa di Radioterapia dell'Ospedale Bellaria di Bologna, si pone l'obiettivo di caratterizzare dosimetricamente i film radiocromici GafChromic EBT3 al fine di implementarne l'utilizzo clinico nell'ambito dei controlli di qualità su piani di trattamento radioterapici VMAT (Volumetric Modulated Arc Therapy). I controlli di qualità per trattamenti VMAT sono attualmente effettuati grazie ad un sistema fantoccio-detector a camere a ionizzazione, Octavius 4D, in grado di ricostruire in maniera accurata la distribuzione di dose tridimensionale deposita
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16

Ruiz, González Néstor A. "Use of GAFCHROMIC® EBT film for in-water measurements of surface dose, buildup region, and other dosimetric parameters of 6, 9, 12, 16, and 20 MeV electron beams a thesis /." San Antonio : UTHSC, 2008. http://learningobjects.library.uthscsa.edu/cdm4/item_viewer.php?CISOROOT=/theses&CISOPTR=38&CISOBOX=1&REC=1.

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17

Hira, Mukhraj. "Study of the effect of tungsten shields on the radiation dose delivery in a gynecological applicator using Gafchromic film dosimetry." 2007. http://proquest.umi.com/pqdweb?did=1397916741&sid=1&Fmt=2&clientId=39334&RQT=309&VName=PQD.

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Thesis (M.S.)--State University of New York at Buffalo, 2007.<br>Title from PDF title page (viewed on Feb. 20, 2008) Available through UMI ProQuest Digital Dissertations. Thesis adviser: Malhotra, Harish K., Zeng, Hao. Includes bibliographical references.
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