近距离放射治疗中的三维剂量测定：一项MAGAT研究。

Three-dimensional dosimetry in brachytherapy: A MAGAT study.

作者信息

Lin Min-Hsing, Huang Tzung-Chi, Kao Ming-Jen, Wu Jay, Chen Chia-Lin, Wu Tung-Hsin

机构信息

Department of Family Medicine and Physical Check-up Center, Tainan Hospital Department of Health, Executive Yuan, Taiwan, ROC.

出版信息

Appl Radiat Isot. 2009 Jul-Aug;67(7-8):1432-7. doi: 10.1016/j.apradiso.2009.02.072. Epub 2009 Feb 26.

DOI:10.1016/j.apradiso.2009.02.072

PMID:19303785

Abstract

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 2mm slice thickness of MR images and [5x5] smoothing filter are considered the optimal parameters to provide accurate dose estimations and isodose curves.

摘要

本研究旨在通过常氧聚合物凝胶剂量计，评估在磁共振成像（MR）过程中，使用不同矩阵大小的平滑滤波器进行图像后处理以及不同层厚对铱-192高剂量率近距离放射治疗剂量估计的影响。我们的结果表明，在改变这些参数时，凝胶剂量计具有敏感性，其中，磁共振图像2毫米层厚与[5×5]平滑滤波器的组合被认为是提供准确剂量估计和等剂量曲线的最佳参数。