中国医疗设备Issue(1)：48-50,34,4.DOI:10.3969/j.issn.1674-1633.2016.01.012
近距离放疗施源器挡块对放疗剂量分布的影响
Impact of Shielding in Applicator on Dose Distribution in Brachytherapy
摘要
Abstract
The paper aims to investigate principle of applying shieding application to spare healthy tissues in brachytherapy with the use of Ir-192 in designing the treatment regimen. The 90° and 180° shieldings were added to the applicator to calculate the result of dose distribution. Dose distribution was then measured using a 2D ion chamber array dosimeter in the transverse and coronal planes for these treatment plans. Gama analysis method (3%, 3 mm) was adopted to compare the dose distribution with the TPS calculations. The results indicate that the dose distribution to the organs in the shield shadow were obviously much lower than the prescribed doses for treatment volume and essentially remained within their tolerance limits for clinical dose prescriptions. It is concluded that the shielding application can effectively reduce the radiation dosage and protect normal tissues and organs.关键词
近距离治疗剂量分布/带挡块施源器/二维矩阵/辐射剂量Key words
brachytherapy dose distribution/shielded applicator/two-dimensional matrix/radiation dose分类
医药卫生引用本文复制引用
王新,刘浩,李公平,唐成琼,许敏..近距离放疗施源器挡块对放疗剂量分布的影响[J].中国医疗设备,2016,(1):48-50,34,4.基金项目
乌鲁木齐市科技计划项目（Y12310011）。 （）
