Evaluation the Response of MAGICA Polymer Gel Dosimeter with Electron Beams
نویسندگان
چکیده
The purpose of this study was to evaluate dependence of MAGICA polymer gel dosimeter 1/T2 on different electron energies as well as on different mean dose rates for a standard clinically used Linear accelerator. A calibration curve (in the linear region) based on 12 dosimeters (11 irradiated and one background) was obtained for 6MeV electron beam. Dose rate of dependence was studied in 10MeV electron beam with the use of dose rates 80,160,240,320,400 and 480 1 min MU . Evaluation of dosimeters were performed on Siemens Symphony, Germany 1.5T Scanner in the head coil. A multiecho sequence with 32 equidistant echoes was used for the evaluation of irradiated polymer gel dosimeters. The parameters of the sequence were as follows: TR 3000ms, TE 20ms, Slice Thickness 4mm and FOV 256mm. No trend in polymer-gel dosimeter 1/T2 dependence was found on mean dose rate for electron beams. Key word: MAGICA, polymer gels, MRI, Agarose.
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