Open AccessEvaluation of dose perturbation at the interface of two different density medium using GAFCHROMIC film EBT2 and Monte Carlo code EGSnrc for Co-60 beam
Author(s) -
N K Painuly,
Navneet Singh,
Tuhina Verma,
C. O. Arun,
Lalit Chaudhari,
Archana Saily,
M. C. Pant
Publication year - 2015
Publication title -
journal of cancer research and therapeutics/journal of cancer research and therapeutics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.475
H-Index - 39
eISSN - 0973-1482
pISSN - 1998-4138
DOI - 10.4103/0973-1482.147727
Subject(s) - monte carlo method , physics , computational physics , perturbation (astronomy) , beam (structure) , materials science , statistical physics , optics , statistics , mathematics , quantum mechanics
Accurate dosimetry at the interface of two different density medium (e.g., air cavity in the head and neck cancers and lungs in thoracic region) is a major cause of concern in external beam radiation therapy. It has been observed that there is dose variation in and around air cavities, which occur as a result of the loss of both longitudinal and lateral electronic equilibrium. Heterogeneous structures with spatial differences in functionality and sensitivity for radiation pose challenge to radiation dosimetry. This study is an attempt to evaluate the dose perturbations produced at the interface of two medium for C0-60 gamma radiation.