^(32)Pβ射线在非组织等效介质中产生吸收剂量的估算  

Dosimetry of p-emmitting ^(32)P in non tissue-equivalent medium

作　　者：丁为民[1] 陈英茂[1] 田嘉禾[1] 张锦明[1] 冯惠茹[1] 姚树林[1] 

机构地区：[1]中国人民解放军总医院,北京100853

出　　处：《核技术》2003年第11期875-878,共4页Nuclear Techniques

摘　　要：利用β发射体核素剂量点核函数经验公式计算体外照射培养细胞实验中所使用的32P放射性贴片在组织等效介质(聚乙烯)中的吸收剂量作为标准剂量刻度,用放射自显影方法得出剂量-灰度曲线。结果显示:在0-68.84mGy范围内,吸收剂量与自显影灰度值呈线性关系;根据贴片隔非组织等效介质(培养瓶底玻璃)自显影的灰度值反推出32P放射性贴片在非组织等效介质中产生的吸收剂量及剂量率:1MBq/cm2贴片隔培养瓶底玻璃后的吸收剂量率为21.9 cGy/h。本方法简单、易行,同时可以检测贴片的放射均匀性。We have calculated the absorbed dose in tissue-equivalent medium(polyethylene) from radioactive filter paper with beta dose point kernels, and then elicited the dose-density curve with autoradiography. There is a linear relationship between density and absorbed dose within the range of 0-68.84mGy. So the absorbed dose from the radiaoactive filter paper in non tissue-equivalent medium could be calculated inversely: the absorbed dose rate from 1MBq/cm2 radiaoactive filter paper on the other side of glass bottom of the culture bottle is 21.9 cGy/h. The method is simple and can be used to inspect the radio-uniformity of radioactive filter paper at the same time.

关 键 词：Β射线 ^32P 吸收剂量 放射自显影 

分 类 号：R817.9[医药卫生—影像医学与核医学]