期刊论文

Analysis of the evaluation errors of dose-volume parameters for left ventricular myocardium in esophageal cancer radiotherapy

中文

中华放射肿瘤学杂志

1004-4221

2018

27

9

830-834

10.3760/cma.j.issn.1004-4221.2018.09.009

国家自然科学基金（81301936）； 山东省重点研发计划项目2018GSF118048~~；

本校为第一机构

目的评估食管癌放疗中左心室肌剂量体积指标随心跳的动态变化范围。方法选取22例患者的屏气下心电门控4DCT,在其20个时相(0%~95%)上分别勾画左心室肌。在模拟定位CT上进行计划设计,将剂量分布导人MIM Maestro系统,重建4D剂量体积直方图。分析不同时相左心室肌的位置、体积及相似性指数(DSC)变化;研究不同时相下左心室肌D_(mean)、V_(10)、V_(20)、V_(30)及V_(40)的变化范围。结果(1)左心室肌在y轴方向位移最大;不同时相间体积及DSC最大变化率分别为(24.23±11.35)%和(184.33± 128.61)%(P

Objective To evaluate the dynamic variation of the dose-volume parameters of the left ventricular myocardium following heart beat in radiotherapy for esophageal cancer. Methods The left ventricular myocardium of 22 patients was contoured on 20 phases (0%-95%) of electrocardiography (ECG) gated heart 4DCT images. The radiotherapy plan was designed on the simulation CT images, and then the dose distribution of radiotherapy plan was imported into MIM Maestro system and 4D dose-volume histogram (DVH) was reconstructed. The variations of position, v...