中国癌症防治杂志2009，Vol.1Issue(2)：127-129,133,4.
食管癌图形引导的放射治疗(IGRT)6个自由度摆位误差研究
Study of 6-D setup error in IGRT on esophageal carcinoma
摘要
Abstract
Objective When patients are in radiotherapy,setup errors are unavoidable which may affect the precision for radiotherapy.This study was to analyze the setup errors in radiotherapy on esophageal cancer.Methods Translational errors (X,Y,and Z) and rotational errors (U,V and W) were obtained by using cone-beam computed tomography (CBCT) in radiotherapy.Patients received a total of 348 CBCT scans after initial setup,re-positioning and radiation delivery.The CBCT images were registered to the planning CT images,and then the setup errors on X,Y,Z,U,V and W degrees were analyzed.Results Setup errors were normal distribution.The systemic±random errors on X,Y,Z,U,V and W axes were (0.85±3.56)mm,(1.82±4.00)mm,(-2.31±2.10)mm,(0.59±0.85)°,(0.29±1.30)° and (0.40±0.86)°,respectively.Comparing the initial setup errors,the re-positioning setup errors decreased significantly on all the six axes (P＜0.05).Conclusion s The setup errors in Y and Z degree are more obviously,while some biggish setup errors exist in rotational errors.Measurement and correction of setup errors before each fraction by using CBCT could help to improve the precision for radiotherapy.关键词
图像引导放疗/锥形束/摆位误差/食管癌Key words
Image guided radiotherapy (IGRT)/Cone-beam computed tomography (CBCT)/Setup errors/ Esophageal cancer分类
医药卫生引用本文复制引用
谢志原,王捷忠,瞿宜艳,柏朋钢,李奇欣,吴君心..食管癌图形引导的放射治疗(IGRT)6个自由度摆位误差研究[J].中国癌症防治杂志,2009,1(2):127-129,133,4.基金项目
卫生部科学基金福建省卫生教育联合攻关计划项目资助(WKJ2008-2-47-1) （WKJ2008-2-47-1）
