Dosimetric properties of MAGIC-f polymer gel assessed to Radiotherapy clinical beams

Abstract

Dosimetric properties of MAGIC-f gel were studied for a wide range of beams used in Radiotherapy. The MAGIC-f tissue-equivalence was theoretically verified using PENELOPE Monte Carlo code and experimentally by percentage depth dose curves for water and gel (maximum differences of 2.0% and 0.5% for 6MV and 10MV, respectively). Energy and dose-rate dependency were evaluated in a range from 60 kV to 10 MV and 0.44 Gy/min to 10 Gy/min respectively. MAGIC-f presents linearity to all energies studied and its sensitivity presents maximum and average variation of 8.6% and 7.7% respectively in the range of energy considered. The study of dose rate dependency evidence that MAGIC-f presents no significant variation of response in clinical intervals of dose rate: lower than 0.7% when x-ray are considered and lower than 1.9% when all beams are considered. Its dosimetric characteristics indicate that MAGIC-f is a very suitable dosimeter for Radiotherapy. © 2010 IOP Publishing Ltd.