Ultrasound evaluation of polymer gel dosimeters
作者： Melissa L Mather , Andrew K Whittaker , Clive Baldock
DOI: 10.1088/0031-9155/47/9/302
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摘要: A new method for the evaluation of radiotherapy 3D polymer gel dosimeters has been developed using ultrasound to assess significant structural changes that occur following irradiation dosimeters. The ultrasonic parameters acoustic speed propagation, attenuation and transmitted signal intensity were measured as a function absorbed radiation dose. dose sensitivities each parameter determined 1.8 × 10−4 s m−1 Gy−1, 3.9 dB Gy−1 3.2 V−1 respectively. All displayed strong variation with continued beyond doses 15 Gy. measurements demonstrated significantly larger dynamic range in response curves than achieved previously published magnetic resonance imaging (MRI) data. It is concluded shows great potential technique
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