摘要
为根据治疗条件，快速、准确地计算出达到某靶点治疗剂量所需要的处方剂量，利用卫生部工卫所的ＲＴ１００ 放疗剂量仪测量西门子公司ＭＥＶＡＴＲＯＮ ＫＤ２ 型电子直线加速器Ｘ 线在水模中特定点的剂量分布，拟合出剂量分布函数Ｐ′（ｆ，ｄ）。引入剂量比概念，并编写出中文提示的靶点剂量与处方剂量转换的计算程序。经分别模拟不同的治疗条件，测量水模中假设靶点的剂量，测量的剂量与计算的剂量相对误差小于１２％ 。这表明，利用本方法可以快速准确地实现靶点剂量与处方剂量的转换。
This study aimed at how to calculate the prescription dose quickly and accurately. according to the conditions of radiotherapy and the dose of target point. RT 100 Radiotherapy Dosemetre, which was calibrated at the Industrial Health Institute of National Ministry of Health, was used to detect the dose distribution of special points in the phantom. Functions of dose distribution were fitted on the basis of the detected points. The dose ratio was introduced, and the calculation protocol indexed with Chinese for prescription dose was programmed. The doses of assumed points at the phantom which imitated various conditions of radiotherapy were detected. The detected doses were very close to the calculated doses, with the relative error less than 1.2%. It is concluded that dose of target point can be transformed to the prescription dose quickly and accurately with the method of dose ratio.
出处
《生物医学工程学杂志》
EI
CAS
CSCD
北大核心
1999年第1期124-126,共3页
Journal of Biomedical Engineering
