山东医药2016，Vol.56Issue(40)：9-12,4.DOI:10.3969/j.issn.1002-266X.2016.40.003
放射性125 I粒子源在肝组织中的照射剂量分布
Dose distribution of 125 I source in the liver tissues
摘要
Abstract
Objective To investigate the dose distribution characteristics of radioactive 125 I particle source in liver tis-sues and provide a reference for the brachytherapy dose calculations.Methods We applied the method of thermolumines-cence dosimetry and used"M"glyph space to implant LiF ( Mg, Cu, P) .The relationships between the exposure dose ( X) of the thermoluminescence dose element and the measured data ( Y) were analyzed.Then, we measured and calculat-ed the radiation absorbed dose changes and field distribution of 125 I radioactive particle sources in the liver tissues of the ax-ial, radial and the four-point directions of the line.Results The reading of thermoluminescent dosimeter ( Y) had linear relationship with the exposure dose (X).The linear regression equation was Y=0.134 2X-0.014 7 (R2 =0.999, P<0.01).With the increase of the distance from the source, the dose of 125I particle source in axial, radial and middle line showed a rapid decreasing tendency.According to different angles, the absorbed dose of equidistance locus were different, the radial dose >dose in middle line direction >the axial dose.Conclusion The dose distribution of 125 I particle source in liver tissues was uneven, and the dose distribution is similar to the"apple"shape with dose sag area and dose bump area distribution characteristics.关键词
125 I粒子源/热释光剂量元件/肝组织/照射剂量分布Key words
125 I particle source/thermoluminescent dosimeter/liver tissues/dose and field distribution分类
医药卫生引用本文复制引用
安梦林,强永刚,廖永华,向湘..放射性125 I粒子源在肝组织中的照射剂量分布[J].山东医药,2016,56(40):9-12,4.基金项目
国家自然科学基金资助项目（81071152）。 （）
