[1]张白霖,戴振晖,朱琳,等. 基于光学表面监测系统进行头部肿瘤放疗实时定位准确性的初步研究[J].中国医学物理学杂志,2019,36(4):389-393.[doi:DOI:10.3969/j.issn.1005-202X.2019.04.004]
　ZHANG Bailin,DAI Zhenhui,ZHU Lin,et al. Preliminary study on accuracy of real-time positioning with optical surface monitoring system during radiotherapy for head tumor[J].Chinese Journal of Medical Physics,2019,36(4):389-393.[doi:DOI:10.3969/j.issn.1005-202X.2019.04.004]
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 基于光学表面监测系统进行头部肿瘤放疗实时定位准确性的初步研究()
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《中国医学物理学杂志》[ISSN:1005-202X/CN:44-1351/R]

卷:
36卷
期数:
2019年第4期
页码:
389-393
栏目:
医学放射物理
出版日期:
2019-04-25

文章信息/Info

Title:
 Preliminary study on accuracy of real-time positioning with optical surface monitoring system during radiotherapy for head tumor
文章编号:
1005-202X（2019）04-0389-05
作者:
 张白霖; 戴振晖; 朱琳; 杨耕; 朱远湖; 招什武; 蔡春雅; 李飞; 王学涛
 广州中医药大学第二附属医院放疗中心， 广东 广州 510006
Author(s):
 ZHANG Bailin;  DAI Zhenhui;  ZHU Lin;  YANG Geng;  ZHU Yuanhu;  ZHAO Shiwu;  CAI Chunya;  LI Fei;  WANG Xuetao
 Radiotherapy Center, the Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou 510006, China
关键词:
 ; 头部肿瘤; 光学表面监测系统; 锥形束CT; 摆位误差; 立体定向放射治疗
Keywords:
 ; head tumor;  optical surface monitoring system;  cone beam CT;  positioning error;  stereotactic radiotherapy
分类号:
R312；R811.1
DOI:
DOI:10.3969/j.issn.1005-202X.2019.04.004
文献标志码:
A
摘要:
 目的：评估瓦里安直线加速器EDGE上搭载的光学表面监测系统（OSMS）对偏差探测的准确性（或纠错能力）。方法：使用一个颅脑体模，评估OSMS治疗前摆位准确性、治疗中监测偏移精确度、特定条件下（非零床角和仅双摄像头工作）能否正常使用。结果：OSMS实现治疗前摆位，其等中心与锥形束CT（CBCT）摆位的偏差范围为（0.6±0.5） mm，角度最大偏差为0.3°；治疗中监测偏移精确度，探测平移偏差范围（0.1±0.2） mm，探测角度偏差范围0.10°±0.07°；不同的床角下OSMS的精确度接近，挡住其中一个摄像头产生约0.5 mm的不确定度。结论：OSMS配合CBCT能够为头部肿瘤放疗的治疗前摆位及治疗中实时监测提供保证。
Abstract:
 Abstract: Objective To evaluate the deviation detection accuracy of optical surface monitoring system (OSMS) in Varian linear accelerator EDGE. Methods A head phantom was used to evaluate the positioning accuracy before treatment, monitor the position shift during treatment and assess the performance of OSMS under certain conditions (non-zero couch angle or only two cameras at work). Results OSMS achieved the positioning before treatment, and the deviation range between the positioning with CBCT and that with OSMS was (0.6±0.5) mm, with a maximum angle deviation of 0.3°. Moreover, the deviation range of position shift during treatment between OSMS and CBCT was (0.1±0.2) mm, and the deviation range of detection angle was 0.10°±0.07°. Even at different couch angles, the accuracy of OSMS was similar. However, an uncertainty of 0.5 mm was generated when one of cameras was blocked. Conclusion OSMS combined with CBCT in radiotherapy for head tumors can provide guarantee for positioning before treatment and real-time monitoring during treatment.

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备注/Memo

备注/Memo:
 【收稿日期】2018-12-11
【基金项目】广东省科技计划项目（2017ZC0165）
【作者简介】张白霖，工程师，研究方向：肿瘤放射物理，E-mail: 183489907@qq.com
【通信作者】王学涛，主任技师，研究方向：肿瘤放射物理，E-mail: wangxuetao0625@126.com
更新日期/Last Update: 2019-04-22