Abstract
Intraoperative electron radiation therapy is one of the cancer treatment techniques that delivers high doses to the tumor bed by dedicated mobile accelerators such as LIAC. Two types of applicators (standard cylindrical applicators and beam shaper applicator) can be used with LIAC. The aim of this study was to investigate and compare the physical and dosimetric characteristics of emerging electrons from distal end of mentioned applicators. For this purpose, percentage depth dose, dose profiles and output factors were measured and compared. Furthermore, energy and angular distribution of electron beam at the exit of both applicator types were calculated by Monte Carlo simulation. A considerable difference was observed in both physical and dosimetric characteristics of emerging electrons from distal end of applicators under investigation which is mainly due to the presence of shielding blades in design of beam shaper applicator. This difference in both dosimetric and physical properties, can change the considered treatment planning procedure for patient irradiation during the employment of each studied applicator type.
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