3D dosimetry by MRI scanning (MAGICA Gel Dosimetry)
Journal Title: Journal of Science and today’s world - Year 2013, Vol 2, Issue 11
Abstract
The purpose of this study was to evaluate dependence of MAGICA polymer gel dosimeter 1/T2 on different electron in order to advantage the percentage depth dose (PDD) of MAGICA polymer gel dosimeter in electron beams using MRI technique for a standard clinically used an elekta linear accelerator. Using MRI, the formulation to give the maximum change in the transverse relaxation rate R2(1/T2) was determined to 8% gelatin, 0.5% agarose, 9% methacrylic acid, 0.0352% ascorbic acid, 0.0015% CuSO4.5H2O, 0.002% hydroquinone and 82.3% HPLC(Water). When the preparation of final polymer gel solution is completed, it is transferred into phantoms and allowed to set by storage in a refrigerator at about 4 degree centigrade. The response of MAGICA gel with electron beams is very similar in the lower dose region and the R2-dose response was linear up to 40Gy. In this study, the percentage depth dose (PDD) of MAGICA polymer gel dosimeter is determined and different phantoms of MAGICA gels was irradiated to 1000cGy of doses by 6, 8, 12 and 18MeV electrons and The maximum percentage depth dose (PDD) is located at the depths of 0.5, 1, 2 and 3cm.
Authors and Affiliations
K. Adinehvand ,A. M. Mouradifar, N. Fatollahi, M. Homayouni, N. Khatibi
Keywords
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