摘要
目的:解决射波刀治疗过程中发生关节限制联锁的问题。方法:统计本院2014年射波刀治疗中发生关节限制联锁的16例患者资料,随机抽取2014年未发生关节限制联锁的16例患者资料进行比对。针对影像中心至靶区中心距离(ITD)以及节点源轴距(n-SAD)分别采用受试者特征(ROC)曲线分析指标的诊断价值。结果:根据计划测定的ITD值,将93.989 5 mm作为最佳截断点时的诊断价值最高,灵敏度和特异度均为100%,对应的ROC曲线下面积为1.000 0。根据测定的n-SAD值,将874.879 0 mm作为最佳截断点时的诊断价值最高,此时灵敏度和特异度分别为62.5%和93.8%,对应的ROC曲线下面积为0.734 0。结论:ITD的诊断价值比n-SAD高。当射波刀治疗计划中ITD值大于100 mm时,应删除计划的94号节点。
Objective To solve the problem of joint limitation interlock in Cyberknife treatment. Methods Admitted in 2014,16 patients who suffered joint limitation interlock during Cyberknife treatment were statistically analyzed and compared with the other 16 patients without joint limitation interlock. Receiver operating characteristic（ROC） curve was applied to analyze the diagnostic value of image center to target center distance（ITD） and node source-axis distance（n-SAD）. Results Based on the measured ITD, when the cut-off value was 93.989 5 mm, the diagnostic value was the best; both the sensitivity and the specificity achieved 100%; the area under the ROC curve was 1.000 0. Based on the measured n-SAD, when the cutoff value was 874.879 0 mm, the diagnostic value was most satisfactory; the sensitivity and the specificity were respectively62.5% and 93.8%; the area under the ROC curve was 0.734 0. Conclusion The diagnostic value of ITD is better than that of n-SAD. When the ITD value in Cyberknife treatment plan was over 100 mm, the node of No.94 should be deleted.
出处
《中国医学物理学杂志》
CSCD
2016年第5期522-524,共3页
Chinese Journal of Medical Physics
关键词
射波刀
关节限制
影像中心至靶区中心距离
节点源轴距
Cyberknife
joint limitation
image center to target center distance
node source-axis distance
