FLUKA-BASED MONTE CARLO INVESTIGATION OF MICRODOSIMETRIC DISTRIBUTIONS OF TELECOBALT BEAM
| Autor: | Arghya Chattaraj, Debabrata Datta, T. Palani Selvam |
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| Rok vydání: | 2017 |
| Předmět: |
Models
Anatomic Materials science Photon Monte Carlo method Site size Proportional counter Electron Imaging phantom 030218 nuclear medicine & medical imaging 03 medical and health sciences 0302 clinical medicine Humans Radiology Nuclear Medicine and imaging Cobalt Radioisotopes Radiometry education education.field_of_study Radiation Radiological and Ultrasound Technology Public Health Environmental and Occupational Health Wedge filter General Medicine Computational physics 030220 oncology & carcinogenesis Monte Carlo Method Beam (structure) |
| Zdroj: | Radiation Protection Dosimetry. 178:430-440 |
| ISSN: | 1742-3406 0144-8420 |
| Popis: | FLUKA-based Monte Carlo calculations of microdosimetric distributions in water phantom involving a walled spherical Tissue-Equivalent Proportional Counter filled with tissue-equivalent propane gas have been studied for an indigenously developed telecobalt machine. The simulated site size considered in the study was 2 μm. In the Monte Carlo calculations, field size was varied from 10 cm × 10 cm to 35 cm × 35 cm and the depth was varied as 5-20 cm. The study also includes calculation of microdosimetric distributions with a 30° wedge filter. The efficiency of the calculations was improved up to a factor of 26 by choosing appropriate cut off values for production and transport of electrons. The calculated microdosimetric distributions of telecobalt machine is distinctly different from that of a bare 60Co source which is attributed to the influence of scattered photons from the machine head and the water phantom. |
| Databáze: | OpenAIRE |
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