Evaluation of linearity response of a new nanocomposite dosimeter in a high dose per pulse intra-operative radiotherapy field

، صفحه 0-0 (1)
عنوان دوره: اولین دوره بین المللی و بیست و هشتمین دوره ملی (1400)
linearity response of a dosimeter is highly recommended during the in-field radiation dosimetry of a linear medical accelerator. The aim of this study is to evaluate the linearity response of a newly developed real-time polymer-Carbon Nanotube (CNT) nanocomposite dosimeter for 6 MeV electron beam of the LIAC machine, a high dose per pulse dedicated intraoperative electron radiotherapy (IOeRT). The dosimeter response was measured as the variation of electric current in the nanocomposite during the irradiation through the 6 MeV electrons with 10 cm reference applicator size using a PTW-UNIDOS E electrometer at the surface of a polymethyl methacrylate (PMMA) slab. The dosimeter response was increased by increasing Monitor Units (MUs) electron beam direction. Results showed that the dosimeter response was linear at various MUs ranging from 100-1500. The maximum standard deviation of readouts was measured as 1.2% in each MU. The suitable results of this study confirmed the application of polymer- CNT nanocomposite dosimeter in high energy radiotherapeutic field.
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