肿瘤预防与治疗2026，Vol.39Issue(9)：785-790,6.DOI:10.3969/j.issn.1674-0904.2026.09.008
CyberKnife M6立体定向放射外科治疗系统位置误差校正技术的精度分析
Precision Analysis of the Position Correction Technique for the Cy-berKnife M6 Stereotactic Radiosurgery System
黄燕梅 1廖雄飞 1周沫涵 1高绪峰 1应微1
作者信息
- 1. 610041 成都,四川省肿瘤医院·研究所,四川省肿瘤临床医学研究中心,四川省癌症防治中心,电子科技大学附属肿瘤医院 放疗科
- 折叠
摘要
Abstract
Objective:Stereotactic radiosurgery(SRS)is the cornerstone of precision radiotherapy for intracranial,spi-nal,and thoracoabdominal malignancies.However,positioning errors may cause target misalignment,resulting in underdos-age of the tumor volume and excessive irradiation of normal tissues.This study evaluated the positioning accuracy of the Cy-berKnife M6 SRS system and the efficacy of its position error correction technology,providing a basis for quality control in stereotactic radiotherapy(SRT)for various malignancies.Methods:The study assessed the stability and reproducibility of image-guided automatic registration in the CyberKnife M6 system.Using the stereotactic dose verification phantom(REF 91250),simulated positioning errors during treatment were created to measure and analyze the system's positioning accuracy across three linear axes[X(superior-inferior),Y(left-right),Z(anterior-posterior)]and two rotational axes(r-axis for roll,p-axis for pitch).The SRS Mapcheck phantom was then employed to verify dose delivery accuracy during position compensation irradiation.Results:The CyberKnife M6 system demonstrated excellent mechanical stability,with the total average positioning accuracy exhibiting repeatability devia-tions of≤0.2 mm along the linear axes and≤0.3° along the rotational axes.Notably,the CyberKnife M6 system demon-strated 100%dose delivery accuracy during irradiation with the position correction technique enabled.Conclusion:The Cy-berKnife M6 system demonstrates excellent mechanical stability and high precision in position error correction during image-guided radiotherapy.This correction technique ensures accurate target dose delivery while sparing normal tissues,fully sup-porting its clinical application in SRS for intracranial,thoracic,abdominal,and spinal malignancies.关键词
射波刀/定位精度/位置误差校正技术/自动配准/图像引导放射治疗Key words
CyberKnife/Positional accuracy/Position correction technique/Automatic registration/Image-guided radio-therapy分类
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黄燕梅,廖雄飞,周沫涵,高绪峰,应微..CyberKnife M6立体定向放射外科治疗系统位置误差校正技术的精度分析[J].肿瘤预防与治疗,2026,39(9):785-790,6.
