Verification of treatment planning algorithms using optically stimulated luminescent dosimeters in a breast phantom

Zhenia Gopalakrishnan, Raghuram K Nair, P Raghukumar, Sharika V Menon, Saju BhasiJournal of Medical Physics 2018 43(4):264-269Aim: The aim of this study is to measure and compare the surface dose of treated breast and contralateral breast with the treatment planning system (TPS) calculated dose using calibrated optically stimulated luminescent dosimeter (OSLD) in an indigenous wax breast phantom. Materials and Methods: Three-dimensional conformal plans were generated in eclipse TPS v. 13 to treat the left breast of a wax phantom for a prescribed dose of 200 cGy. The plans were calculated using anisotropic analytical algorithm (AAA) and Acuros algorithm with 1-mm grid size. Calibrated OSLDs were used to measure the surface dose of treated and contralateral breasts. Results: Large differences were observed between measured and expected doses when OSLDs were read in “reading mode” compared to the “hardware mode.” The consistency in the responses of OSLDs was better (deviation

Source: Journal of Medical Physics - December 7, 2018 Category: Physics Authors: Zhenia Gopalakrishnan Raghuram K Nair P Raghukumar Sharika V Menon Saju Bhasi Source Type: research