摘要
讨论了放射治疗中确定β源周围剂量分布的方法。在实验上采用１０μｍ厚的ＴＬＤ超薄元件进行测量，理论上采用了Ｂｅｒｇｅｒ方法进行估算，与外推电离室值比较，前者符合较好，后者在离源２—５ｍｍ范围内偏差小于±５％。
ethods for determining the dose distribution around a beta applicator are described.Experimentally a TLD dosimeter(about 10μm in thickness) was used to measure the dose and its distribution in a polystyrene phantom.Theoretically Berger's method was adopted to calculate the dose distribution.An extrapolation ionization chamber was used to check feasibility of the above methods.It was found that the TLD method was in considerable agreement with the chamber method while the calculation was correct in a distance of 2-5mm to the source with an error of less than ±5%.
出处
《核技术》
EI
CAS
CSCD
北大核心
1994年第2期125-128,共4页
Nuclear Techniques
关键词
辐射剂量
β施用器
放射疗法
Radiotherapy
Radiation dose
TLD
β-applicator
