We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
MONTE CARLO-BASED INVESTIGATION OF MICRODOSIMETRIC DISTRIBUTION OF HIGH ENERGY BRACHYTHERAPY SOURCES.
- Authors
Chattaraj, Arghya; Selvam, T Palani; Datta, D
- Abstract
FLUKA-based Monte Carlo calculations were carried out to study microdosimetric distributions in air and in water for encapsulated high energy brachytherapy sources (60Co, 137Cs, 192Ir and 169Yb) by simulating a Tissue Equivalent Proportional Counter (Model LET1/2) having sensitive diameter of 1. 27 cm for a site size of 1 μm. The study also included microdosimetric distributions of bare sources. When the sources are in air, for a given source, the source geometry does not affect the y ¯ F and y ¯ D values significantly. When the encapsulated 192Ir, 137Cs and 60Co sources are in water, y ¯ F and y ¯ D values increase with distance in water which is due to degradation in the energy of photons. Using the calculated values of y ¯ D , relative biological effectiveness (RBE) was obtained for the investigated sources. When 60Co, 137Cs and 192Ir sources are in water, RBE increases from 1.03 ± 0.01 to 1.17 ± 0.01, 1.24 ± 0.01 to 1.46 ± 0.02 and 1.50 ± 0.01 to 1.75 ± 0.03, respectively, when the distance was increased from 3–15 cm, whereas for 169Yb, RBE is about 2, independent of distance in water.
- Subjects
MONTE Carlo method; ENERGY dissipation; HIGH dose rate brachytherapy; WATER distribution; RADIOISOTOPE brachytherapy; INVESTIGATIONS; PHOTONS
- Publication
Radiation Protection Dosimetry, 2019, Vol 187, Issue 1, p115
- ISSN
0144-8420
- Publication type
Article
- DOI
10.1093/rpd/ncz148