[1]叶峰,翟振宇,牟忠德.OSMS在腹部肿瘤放疗摆位中的应用[J].中国医学物理学杂志,2020,37(7):828-833.[doi:DOI:10.3969/j.issn.1005-202X.2020.07.006]
　YE Feng,ZHAI Zhenyu,MU Zhongde.Application of OSMS in positioning for abdominal tumor radiotherapy[J].Chinese Journal of Medical Physics,2020,37(7):828-833.[doi:DOI:10.3969/j.issn.1005-202X.2020.07.006]
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OSMS在腹部肿瘤放疗摆位中的应用()
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《中国医学物理学杂志》[ISSN:1005-202X/CN:44-1351/R]

卷:
37
期数:
2020年第7期
页码:
828-833
栏目:
医学放射物理
出版日期:
2020-07-25

文章信息/Info

Title:
Application of OSMS in positioning for abdominal tumor radiotherapy
文章编号:
1005-202X（2020）07-0828-06
作者:
叶峰; 翟振宇; 牟忠德
江苏省肿瘤医院放疗科， 江苏 南京 210009
Author(s):
YE Feng;  ZHAI Zhenyu;  MU Zhongde
Department of Radiotherapy, Jiangsu Cancer Hospital, Nanjing 210009, China
关键词:
腹部肿瘤; 光学表面监测系统; 摆位误差
Keywords:
Keywords: abdominal tumor optical surface monitoring system positioning error
分类号:
R815
DOI:
DOI:10.3969/j.issn.1005-202X.2020.07.006
文献标志码:
A
摘要:
目的：通过与锥形束计算机断层扫描（CBCT）参照对比，探讨光学表面监测系统（OSMS）在腹部肿瘤放疗中摆位的作用，探讨OSMS的摆位精度及其应用价值。方法：选取4名腹部肿瘤患者，应用体表“＋”标记与激光灯进行治疗前摆位，行CBCT同时进行OSMS运行前的验证，分别记录OSMS和CBCT提供的配准信息，记录X（左右）、Y（头脚）与Z（前后）方向的平移误差。应用Pearson方法分析摆位误差的相关性、系统误差与随机误差，并用Bland-Altman方法评估OSMS的置信空间。计算常规方法摆位以及经过OSMS摆位后95%的剂量偏移靶区体积的k值。结果：研究发现OSMS与CBCT的摆位精度具有很好的相关性，X、Y与Z方向的相关系数分别为0.628、0.858、0.682。OSMS摆位在X、Y与Z方向的系统误差±随机误差分别为（0.01±0.33）、（-0.14±0.64）、（0.13±0.41） mm，k值为（0.801 9±0.704 4）%。结论：OSMS在实际应用中体现出与CBCT配准数据的一致性，可以摆脱CBCT的引导独立使用，精度较高。
Abstract:
Abstract: Objective To investigate the role of optical surface monitoring system (OSMS) in the positioning for abdominal tumor radiotherapy by comparing with CBCT-based positioning, and to explore the positioning accuracy of OSMS and its application value. Methods Four patients with abdominal tumor were enrolled. The "+" mark on the body surface and laser lamp were used to realize pre-treatment positioning. During CBCT examination, OSMS was verified before operation. The registration information provided by OSMS and CBCT was recorded separately, and translational errors in X (left-right), Y (head-foot) and Z (front-back) directions were recorded. Pearson method was used for analyzing positioning errors, systematic errors and random errors, and Bland-Altman method for evaluating the confidence interval of OSMS. The k value of 95% dose-shifted target volume after positioning by the conventional method or OSMS was calculated. Results There was a good correlation between the positioning accuracy of CBCT and that of OSMS, and the correlation coefficients were 0.628, 0.858 and 0.682 in X, Y and Z directions, respectively. The systemic error ± random error of OSMS positioning were (0.01±0.33), (-0.14±0.64) and (0.13±0.41) mm in X, Y and Z directions, respectively, and the k value was (0.801 9±0.704 4)%. Conclusion OSMS in the actual application has a high consistency with CBCT registration data. OSMS which has a high accuracy in positioning can be used independently without the guidance of CBCT.

相似文献/References:

[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.[doi:DOI:10.3969/j.issn.1005-202X.2019.04.004]
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备注/Memo

备注/Memo:
【收稿日期】2020-02-21 【基金项目】江苏省肿瘤防治研究所博士后经费（SZL201715） 【作者简介】叶峰，硕士，工程师，研究方向：肿瘤放疗物理，E-mail: yefeng_n@163.com 【通信作者】翟振宇，高级工程师，研究方向：肿瘤放疗物理，E-mail: 1549829033@qq.com
更新日期/Last Update: 2020-07-28