Three-dimensional dosimetry in brachytherapy: A MAGAT study

This study is to evaluate the influence of using different matrix size of smoothing filter for image post-processing and various slice thickness during MR imaging on dose estimation in Ir-192 HDR brachytherapy via normoxic polymer gel dosimeter. Our results show its sensitive nature in gel dosimeter while changing these parameters, among which the combination of 2 mm slice thickness of MR images and [5×5] smoothing filter are considered the optimal parameters to provide accurate dose estimations and isodose curves.