[1]于松茂,杨敬贤,康加阜,等. 不同部位肿瘤患者模拟机复位误差的对比分析[J].中国医学物理学杂志,2018,35(2):141-144.[doi:DOI:10.3969/j.issn.1005-202X.2018.02.004]
　YU Songmao,YANG Jingxian,KANG Jiafu,et al. Comparison of reset errors in simulator for patients with tumors in different locations[J].Chinese Journal of Medical Physics,2018,35(2):141-144.[doi:DOI:10.3969/j.issn.1005-202X.2018.02.004]
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 不同部位肿瘤患者模拟机复位误差的对比分析()
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《中国医学物理学杂志》[ISSN:1005-202X/CN:44-1351/R]

卷:
35卷
期数:
2018年第2期
页码:
141-144
栏目:
医学放射物理
出版日期:
2018-02-08

文章信息/Info

Title:
 Comparison of reset errors in simulator for patients with tumors in different locations
文章编号:
1005-202X（2018）02-0141-04
作者:
 于松茂; 杨敬贤; 康加阜; 刘伟; 岳海振
 北京大学肿瘤医院暨北京市肿瘤防治研究所放疗科/恶性肿瘤发病机制及转化研究教育部重点实验室， 北京 100142
Author(s):
 YU Songmao;  YANG Jingxian;  KANG Jiafu;  LIU Wei;  YUE Haizhen
 Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Department of Radiotherapy, Peking University Cancer Hospital & Institute, Beijing 100142, China
关键词:
 ; 肿瘤; 强调放疗; 模拟机; 图像配准; 配准误差; 配准总误差; 复位误差
Keywords:
 ; tumor;  intensity-modulated radiotherapy;  simulator;  image registration;  registration error;  total registration error;  rest error
分类号:
R730.5
DOI:
DOI:10.3969/j.issn.1005-202X.2018.02.004
文献标志码:
A
摘要:
 目的：对比分析不同部位肿瘤患者治疗计划在模拟机复位工作中的误差分布。 方法：选取104例在瓦里安Acuity模拟定位机上复位的肿瘤病例，其中盆腔部28例、头颈部32例、胸部44例。根据患者定位十字线和从计划系统获取的相对坐标摆位，并按照调强放疗的要求拍摄正侧位射野验证片（冠状面和矢状面），采用系统自动刚性配准方式获取验证片与计划系统生成的数字重建放射图像的配准误差，并对比分析不同部位在X（左右）、Y（升降）、Z（进出）方向的配准误差和总配准误差，从而定量分析复位误差的分布情况。 结果：盆腔部、头颈部和胸部肿瘤的总配准误差的平均值和标准差分别为（0.31±0.14）、（0.17±0.07）、（0.26±0.10） cm，头颈部肿瘤复位重复性较好。 结论：3个部位肿瘤复位精度均满足临床治疗精度要求，其中头颈部肿瘤配准误差较小，表明该部位复位误差较小，重复性较好。
Abstract:
 Objective To compare and analyze the reset errors acquired by simulator during the verification of treatment plans for tumors in different locations. Methods A total of 104 cases of treatment plans which were verified on Acuity simulator (Varian Medical systems, Palo Alto, California) were selected, involving 28 cases of pelvic tumors, 32 of head and neck tumors, and 44 of thoracic tumors. All patients were positioned according to the location of the crosshair and the relative coordinates obtained from the treatment planning system. Based on the requirements of intensity-modulated radiotherapy, two orthogonal X-ray images (one in coronal plane, the other in sagittal plane) were acquired for each case. The registration error (RE) of the digitally reconstructed radiograph images generated by the planning system and the obtained orthogonal X-ray images was obtained by automatic built-in rigid registration algorithm. The RE and total RE in X (left-right), Y (superior-inferior) and Z (anterior-posterior) orientations were analyzed, thus quantitatively analyzing the distribution of reset errors. Results The mean±SD of the total RE was (0.31±0.14), (0.17±0.07), (0.26±0.10) cm for pelvic tumors, head and neck tumors, and thoracic tumors, which revealed that the positioning repeatability of head and neck tumors is superior to that of tumors in other locations. Conclusion The registration accuracy of tumors in different locations satisfies the clinical requirement, and the RE of head and neck tumors is the smallest, which indicated that the head and neck tumors had a small reset error and a good positioning repeatability.

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备注/Memo

备注/Memo:
 【收稿日期】2017-09-18
【基金项目】北京市自然科学基金（1174016）
【作者简介】于松茂，主管技师，研究方向：医学物理，E-mail: ysmkkk@163.com
【通信作者】岳海振，工程师，研究方向：医学物理，E-mail: yuehzh@163.com
更新日期/Last Update: 2018-01-29