Monte Carlo modeling of a Novalis TX Varian 6 MV with HD-120 multileaf collimator
| Autor: | Chengyu Shi, Carlos Esquivel, L. Vazquez‐quino, Tony Yuen Eng, Brian Massingill, Sotirios Stathakis, Alonso N. Gutierrez, Nikos Papanikolaou |
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| Rok vydání: | 2012 |
| Předmět: |
Materials science
BEAMnrc Monte Carlo method Linear particle accelerator Monte Carlo simulations Humans Computer Simulation Radiology Nuclear Medicine and imaging linac Instrumentation Leakage (electronics) Radiation Phantoms Imaging business.industry Radiotherapy Planning Computer-Assisted Radiotherapy Dosage Models Theoretical Distance to agreement Computational physics Multileaf collimator Novalis TX Ionization chamber Patient dose Radiotherapy Intensity-Modulated Technical Notes DOSXYZnrc Particle Accelerators Nuclear medicine business Monte Carlo Method HD‐MLC |
| Zdroj: | Journal of Applied Clinical Medical Physics |
| ISSN: | 1526-9914 |
| DOI: | 10.1120/jacmp.v13i5.3960 |
| Popis: | A Monte Carlo model of the Novalis Tx linear accelerator equipped with high‐definition multileaf collimator (HD‐120 HD‐MLC) was commissioned using ionization chamber measurements in water. All measurements in water were performed using a liquid filled ionization chamber. Film measurements were made using EDR2 film in solid water. Open rectangular fields defined by the jaws or the HD‐MLC were used for comparison against measurements. Furthermore, inter‐ and intraleaf leakage calculated by the Monte Carlo model was compared against film measurements. The statistical uncertainty of the Monte Carlo calculations was less than 1% for all simulations. Results for all regular field sizes show an excellent agreement with commissioning data (percent depth‐dose curves and profiles), well within 1% of difference in the relative dose and 1 mm distance to agreement. The computed leakage through HD‐MLCs shows good agreement with film measurements. The Monte Carlo model developed in this study accurately represents the new Novalis Tx Varian linac with HD‐MLC and can be used for reliable patient dose calculations. PACS number: 87.10.Rt |
| Databáze: | OpenAIRE |
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