CT双窗技术在肺部X刀定位中的价值

目的探讨CT双窗技术在肺部X刀定位中的价值.方法测定周围型肺癌不同窗宽(W)、窗位(C)其大小误差,选择最佳双窗,分析34例肺癌X刀治疗病例.结果(1)不同窗宽测量病灶最大误差7mm.(2)肺部X刀定位双窗以W1120～180、C1-700,W2350、C215为佳.(3)34例肺癌病人用双窗观察,15例周围型肺癌及8例无肺门侵犯中心型肺癌效果颇佳(67.6%),侵犯肺门的中心型肺癌11例轮廓线内缘消失,可根据纵隔窗弥补.结论双窗技术在肺部X刀定位中准确,明显优于单窗显示技术.

The Value of CT Double Windows Technique in the Location of Lung X-ray Knife

Objective To approach the value of CT double windows technique in the location of lung X-ray knife.Methods The varying window width(W),window center(C) of peripheral type carcinoma of lung and their error were deltermined.The best double window was chosen and the clinical matherial was analysed.Results (1)The biggest error among different widow widths measuring foci was 7 mm.(2)The best double windows in the location of lung X-ray knife were W1 120~180,C1-700,W2 350,C2 15.(3)34 cases of lung carcinoma were observed with double windows,the outline of foci was contiuous and clear in the 15 cases of peripheral type carcinoma of lung and 8 cases of central type carcinoma of lung without hilum infiltration(67.6%),the inner outline of foci was disappear but could be remedied by mediastinum window in 11 cases of central type carcinoma of lung with hilum infiltration. Conclusion The double widows technique is provied with accuracy and without lack fidelity,and could reflect more condition of peritumour infiltration,it is clear superior to single display technique.