宫颈癌调强放疗的三维剂量验证
陈旭明,姚升宇,许奕
上海交通大学附属第一人民医院 肿瘤
放疗科,上海 201620
Three-Dimensional Dose Verification of Cervix Cancer Intensity Modulated
Radiation Therapy
CHEN Xu-ming, YAO Sheng-yu,
XU Yi
Department of Radiation Oncology,
Shanghai General Hospital, Shanghai
Jiao Tong University, Shanghai 201620,
China
摘要 目的 使用Compass系统分别验证宫颈癌的调强放疗(Intensity Modulated Radiation
Therapy,IMRT)计划,分析其靶区和正常组织的γ通过率和剂量体积直方图(Dose Volume
Histogram,DVH),以验证其三维剂量分布。方法 选取10例宫颈癌病人,对其设计IMRT计划,
将计划导入Compass系统,进行计算和3位实测剂量重建,针对各靶区与正常组织进行三维γ分析
和DVH分析。结果 10例病人计划的靶区和正常组织γ通过率(以3 mm/3%为标准)都能达到90%
以上。结论 使用Compass系统进行三维剂量验证能够有效保证治疗计划的剂量准确性,在宫颈癌
的放射治疗中,IMRT的三维剂量分布准确性均能达到临床要求。
关键词 :
宫颈癌 ,
三维剂量验证 ,
Compass系统 ,
三维γ分析 ,
剂量重建 ,
调强放疗
Abstract :Objective To make three-dimensional dose verification for cervix cancer intensity modulated
radiation therapy (IMRT) plans by Compass system, then analyze the γ passing rate and dose volume
histogram of the target region and normal tissue to verify three-dimensional dose distribution. Methods
Ten patients with cervix cancer were selected and IMRT plans were designed for them. Then, exported
the 10 IMRT plans to Compass system to calculate and reconstruct three-dimensional dose distribution
for target volume and normal tissue through three-dimensional γ analysis and dose volume histogram
analysis. Results The γ passing rate of the target region and normal tissue of all ten patients were above
90% (taking 3mm/3% as standard). Conclusion Verifying three-dimensional dose distribution with
Compass system can effectively guarantee the dose accuracy of treatment plan and make IMRT plan
meet clinical standard in the radiation therapy of cervix cancer.
Key words :
cervix cancer
three-dimensional dose verification
Compass system
three-dimensional γ
analysis
dose reconstruction
intensity modulated radiation therapy
收稿日期: 2016-03-28
通讯作者:
许奕
E-mail: xuyibjr@163.com
作者简介 :
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