中国医疗设备2017，Vol.32Issue(5)：40-43,4.DOI:10.3969/j.issn.1674-1633.2017.05.010
ExacTrac 6D影像精确引导系统在脑转移瘤SRS中的应用
Application of ExacTrac 6D Image-Guidance System in Stereotactic Radiotherapy Surgery Treatment of Brain Metastasis
张平 1罗龙辉 1戴鹏 1周巧敏 1吴伟 1黄庆2
作者信息
- 1. 广东三九脑科医院 肿瘤综合治疗中心,广东 广州 510510
- 2. 广东三九脑科医院 设备科,广东 广州 510510
- 折叠
摘要
Abstract
Objective To evaluate the importance of the application of ExacTrac 6D image-guidance system in non-coplanar arcs stereotactic radiosurgery treatment of stereotactic radiotherapy surgery (SRS) based on comparing the setup error before and after the reset. Methods From August 2014 to December 2015, a total of 89 brain metastases patients who were treated with SRS were chosen to perform the research. Firstly, the X-ray imaging device of ExacTrac system was used to shoot 2 X-ray images on the target area before treatment and after the table were rotated to a fixed angle, respectively. Then, they were separately matched with the X-ray images that were automatic processed based on the CT data. In this case, the X, Y, Z direction of 3 translation and rotation errors (6D error) of the former were gained. In the following, a key reset placement correction was performed. Finally, ExacTrac 6D image-guidance system were utilized to validate the 6D error of the patients' position. Results Before the treatment when the table placed in 0°angle, three linear error was less than 1.0 mm and 3 rotation error was less than 0.5°after using the X-ray images to guide a key reset, which satisfied the requirement of the SRS radiotherapy. Meanwhile, the 6D errors were much smaller than the positioning error correction before, the differences were significant (P<0.05). When the table was rotated to the setting angle, the use of verification images could adequately reduce the error associated with intrafraction patient movement in all 3 translations and rotations. The differences were significant (P<0.05). Conclusion Application of ExacTrac 6D image-guidance system in non-coplanar arcs stereotactic radiosurgery treatment is feasible. In addition, it can obviously reduce the positioning error caused by rotating the table during frameless stereotactic radiosurgery.关键词
脑转移瘤/ExacTrac6D图像引导系统/立体定向放射治疗/摆位误差Key words
brain metastases/ExacTrac 6D image-guidance system/stereotactic radiotherapy surgery/setup error分类
医药卫生引用本文复制引用
张平,罗龙辉,戴鹏,周巧敏,吴伟,黄庆..ExacTrac 6D影像精确引导系统在脑转移瘤SRS中的应用[J].中国医疗设备,2017,32(5):40-43,4.
