期刊论文

中文

中国医学物理学杂志

1005-202X

2017

34

3

230-234

10.3969/j.issn.1005-202X.2017.03.003

中南大学医疗新技术项目

本校为第一机构

目的:非晶硅电子射野影像装置(a-Si EPID)分别与Arc CHECK和二维电离室矩阵(PTW729)两种验证技术在宫颈癌剂量验证中的应用比较。方法:随机选取40例宫颈癌容积旋转调强技术(VMAT)和调强放射治疗技术(IMRT)病例。在相应的模体上分别设计出验证计划,将验证计划分为VMAT和IMRT两组,利用a-Si EPID和Arc CHECK验证VMAT计划,a-Si EPID和PTW729验证IMRT计划,在UNIQUE加速器上进行验证。采用γ分析方法(3%,3 mm, 10%标准),比较两组验证计划的相对剂量与绝对剂量通过率和X、Y方向的profile。结果:VMAT组:Arc CHECK的绝对剂量通过率为(97.73±1.98)%,相对剂量通过率为(96.96±2.34)%;a-Si EPID的绝对剂量通...

Objective To compare the application of amorphous silicon electronic portal imaging device (a-Si EPID) and Arc CHECK, two-dimensional ionization chamber (PTW729) in the dose verification of cervical cancer. Methods The volumetric modulated arc therapy (VMAT) plans and intensity-modulated radiotherapy (IMRT) plans in 40 patients with cervical cancer were randomly selected. The verifiable plans were designed on corresponding phantoms, and were divided into VMAT group and IMRT groups. The a-Si EPID and Arc CHECK were used to verify VMAT plan, whil...