辐射防护2000，Vol.20Issue(6)：366-369,4.
用TLD测量X射线全身照射的体内相对剂量分布
MEASUREMENT OF RELATIVE DOSE DISTRIBUTIONOF PATIENT IN TOTAL BODY IRRADIATION WITH TLD
李智华 1郑健 1孙福印2
作者信息
- 1. 天津医科大学附属肿瘤医院，300060
- 2. 中国医学科学院放射医学研究所，天津，300192
- 折叠
摘要
Abstract
The Alderson standard phantom was irradiated and the dose distribution in theAlderson Phantom was measured. According to the real radiation treatment conditions and set-ting up conditions of patients who will receive TBI, we used Farmer Ionization Chamber to esti-mate the absolute absorbed dose and used TLD to estimate the relative dose distribution in thePhantom. The energy of X ray used in TBI was 6 MV. The source and skin distance was 450 cm.In order to improve the surface dose, a plastic plate was put in front of the Alderson Phantomjust like what we do in TBI. The thickness of the plastic plate was 1 cm. The dose rate in themiddle of the Phantom was 5.5 cGy per minute. The dose inhomogeneity in the Alderson Phan-tom besides its head is smaller than +10%. The dose inhomogeneity in the whole body amountsto ±14.5％. The inhomogeneity of surface dose is up to 95%. The measuring results demon-strated that our setting up method for the TBI patients are good and could be adopted in TBI.关键词
全身照射/均匀度/热释光探测器Key words
TBI/Homogeneity/TLD分类
能源科技引用本文复制引用
李智华,郑健,孙福印..用TLD测量X射线全身照射的体内相对剂量分布[J].辐射防护,2000,20(6):366-369,4.
