Gel dosimeters are sensitive chemical dosimeters that aim at measuring the dose in three dimensions(3D). This study aims to evaluate the performance of a commercially available BANG
® polymer gel. BANG
® gels were irradiated using 6MV photon beams from 0.5Gy to 60Gy. The magnetic resonance(MR)spin-spin relaxation rate(R
2=1/T
2) of the protons indicates dose response and has a linear relationship to dose. The dose response curve by BANG
® gel appeared approximately linear over the 0.5Gy and 20Gy region. The slope of the dose-R
2 curve is 0.9s
−1Gy
−1, and the relative dose distribution can be reproduced with an overall uncertainty of about 2%. R
2 was found to increase with increasing time after irradiation. BANG
® gels are of comparable quality to MOSFET or PLD in terms of overall dosimetric accuracy and have the advantage of measuring continuous, cumulative 3D dose distributions.
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