Thermoluminescent dosimetry for 103Pd seeds (model 200) in solid water phantom.
Thermoluminescent dosimetry for 103Pd seeds (model 200) in solid water phantom.
复制标题
固体水体模中 103Pd 种子（型号 200）的热释光剂量测定。
DOI：
10.1118/1.596692
复制
发表时间：
1991
期刊：
影响因子：
3.8
通讯作者：
Anderson,LL
中科院分区：
文献类型：
--
作者：
Chiu-Tsao,ST;Anderson,LL
用LiF热释光剂量计(TLD)对固体水模中心的单个103Pd种子(200型)进行了剂量测量。使用边缘1 mm的TLD立方体以1 mm的间隔测量1 mm到1 cm。立方体从种子中心开始沿横轴、纵轴和径向线以10°为单位居中。TLD芯片的大小为3.1×3.1×0.89 mm，间距分别为2、2.5、3、4 cm，角度间隔为15°。数据以距离平方和单位震源强度剂量率的乘积形式表示，绘制成与距离和角度的关系图。在距种子中心1 cm处的横轴上测得该产物为0.88cGycm2mCi−1h−1。建立了用于多种子剂量分布计算的极坐标剂量率表。与Meigoonital的数据进行了比较。[Endocuriether./Hypertheria Oncol.6,107-117(1990)]显示一般同意距离为2厘米或更大。对于103Pd的理想点源，我们的横轴数据与Russell的计算值(Theragenics内部报告，1984年11月4日)的比较显示出非常好的一致性，但距离小于0.5厘米时，差异可归因于实际种子中的扩展源效应。
Dose measurements using LiF thermoluminescent dosimeters (TLD) have been performed for single103Pd seeds (model 200) at the center of a solid water phantom. TLD cubes 1 mm on an edge were used for measurements from 1 mm to 1 cm at 1‐mm intervals. The cubes were centered along transverse and longitudinal axes and along radial lines from seed center at 10° increments. TLD chips of dimension 3.1×3.1×0.89 mm were used at distances of 2, 2.5, 3, and 4 cm at l5° angular intervals. Data are presented as the product of distance squared and dose rate per unit source strength, plotted versus distance and angle. At 1 cm from seed center along the transverse axis this product was found to be 0.88 cGy cm2mCi−1h−1. A dose‐rate table in polar coordinates has been formulated for use with multiseed dose distribution calculations. Comparison with data of Meigoonietal. [Endocuriether./Hyperthermia Oncol.6, 107–117 (1990)] shows general agreement for distances of 2 cm or greater. A comparison of our transverse axis data with Russell's calculated values (Theragenics Internal Report, 4 November 1984) for an ideal point source of103Pd shows very good agreement except at distances less than 0.5 cm, where differences are attributable to the extended source effect in the actual seed.