Commissioning And Quality Assurance Of Treatment Planning Computers Pdf
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- Commissioning And Quality Assurance Of A Treatment Planning System Pdf
- Implementation of a quality assurance program for computerized treatment planning systems.
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- Commissioning of a Geant4 based treatment plan simulation tool : linac model and dicom-rt interface
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Standards The Joint Commission. Accurate model of photon beams as a tool for commissioning. Commissioning and Quality Assurance of Computerized Planning.
Commissioning And Quality Assurance Of A Treatment Planning System Pdf
The treatment planning system TPS has become a key element in the radiotherapy process with the introduction of computer tomography CT based 3D conformal treatment planning. Most of the TPS require these beam data to be generated with routine collimator jaws. This prompted us to investigate whether beam data with jaws differ than that with MLC and whether the jaw based beam data would suffice for the commissioning of a MLC on a TPS. Beam data like percentage depth dose PDD , cross beam profiles and output factors was acquired for jaws and MLC defined square fields for 6, 10 and 23 MV photon beams. Percentage depth dose and cross beam profiles were acquired with a radiation field analyzer RFA, CCS ion chambers with active volume of 0. A Medtec-TG51 water tank with Max electrometer and 0. For the smallest field size studied with micro-MLC i.
View at publisher. The simulation tool was verified via simulation of standard commissioning dosimetry data acquired with an ionisation chamber in a water phantom. Verification of the MLC model was achieved by simulation of leaf leakage measurements performed using GafchromicTM film in a solid water phantom. An absolute dose calibration capability was added by including a virtual monitor chamber into the simulation. The ability of the simulation tool to accurately model leaf movements and doses at each control point was verified by simulation of a widely used intensity-modulated radiation therapy IMRT quality assurance QA technique, the chair test. These databases contain citations from different subsets of available publications and different time periods and thus the citation count from each is usually different. Some works are not in either database and no count is displayed.
Implementation of a quality assurance program for computerized treatment planning systems.
Se desarrollaron los tests propuestos por el TG In this work, it was intended to compare PSQA techniques, to set up available equipment and to propose techniques for routine QA at the institution. A system for the dosimetry with radiochromic films was set up. A film scanner was commissioned, a protocol was developed and the films were calibrated. The tests proposed by TG were carried out. The selected technique was tried on a CIRS phantom through an end to end protocol that mimicked a clinical situation.
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The process of radiation therapy is complex and involves many steps. At each step, comprehensive quality assurance procedures are required to ensure the safe and accurate delivery of a prescribed radiation dose. This report deals with a comprehensive commissioning and ongoing quality assurance program specifically for treatment planning computers.
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Commissioning of a Geant4 based treatment plan simulation tool : linac model and dicom-rt interface
CT images of a phantom with various known in-homogeneities were acquired. The images were transferred to TPS and tested for various parameters related to patient data acquisition, anatomical modeling, plan evaluation and dose calculation. Dosimetric parameters including open, asymmetric and wedged shaped fields, oblique incidence, buildup region behavior and SSD dependence were evaluated. Representative clinical cases were tested for MU calculation and point doses. The results of all non-dosimetric tests were found within tolerance, however expansion at the sharp corners was found distorted. The accuracy of the DVH calculations depends on the grid size. TPS calculations of all the dosimetric parameters were in good agreement with the measured values, however for asymmetric open and wedged fields, few points were found out of tolerance.
Нет, решила. Конечно. Хейл продолжал взывать к ней: - Я отключил Следопыта, подумав, что ты за мной шпионишь. Заподозрила, что с терминала Стратмора скачивается информация, и вот-вот выйдешь на. Правдоподобно, но маловероятно. - Зачем же ты убил Чатрукьяна? - бросила. - Я не убивал его! - Крик Хейла перекрыл вой сирены.
Стратмор был взбешен. Халохот впервые сорвал задание, выбрав неблагоприятные время и место. Получить ключ было необходимо, но Стратмор отлично понимал, что посылать глухого киллера в севильский морг было бы настоящим самоубийством. И тогда он стал искать иные возможности. Так начал обретать форму второй план.
Commissioning and quality assurance of treatment planning computers. Int J Radiat Oncol Biol Phys. May 20;26(2)