Abstract

In this study, we performed BANG-3® polymer gel dosimetry to propose an experimental technique for relative output factor and 3D dose distribution measurements of small radiosurgical fields.We were irradiated 2 collimators (5 and 30 mm diameter) with 6 MV radiosurgery beam. And, MR scanned with the same slice thickness and three different in plane resolutions. In these experiments, output factor measurements with the Pin Point ion chamber and diode, EBT films are compared with BANG-3® polymer gel. We used a spherical phantom filled with BANG-3® polymer gel to measure 3D dose distributions. The irradiated phantom was scanned with an MRI scanner. Dose distributions were obtained by calibrating the polymer gel for a relationship between the absorbed dose and the spin-spin relaxation rate of the magnetic resistance signal.

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