多层螺旋CT后处理技术在周围型小肺癌诊断中的价值

The diagnostic value of MSCT＇s post-processing techniques in small peripheral lung cancer

目的评价多层螺旋CT后处理技术在周围型小肺癌诊断中的价值。方法收集行MSCT扫描且经病理证实的周围型小肺癌（直径≤20mm）36例，分别以MPR、SSD、VR技术进行重建，并与横断面薄层图像对比分析。结果MPR显示血管集束征、分叶征、细短毛刺征，SSD显示胸膜凹陷，VR显示血管集束征、分叶征敏感性均较横断薄层图像提高10％以上。结论MSCT后处理技术在显示肺癌征象上较横断面图像具有较高的价值，特别是多种后处理方法联合应用更有不可替代的优势。

Objective To evaluate the value of post-processing techniques of multi-slice spiral CT（MSCT） in diagnosis of small peripheral lung cancer. Methods 36 patients with small peripheral lung cancer（ ≤20mm in diameter） who had been proved by pathology were couected. After MSCT scanning,3D reconstruction images were made by MPR,SSD and VR,then compared with axial thin-slice images. Results The sensitivity of MPR on vascularnotch sign,lobulation and spiculated sign was higher than that of axial thin-slice images. The sensitivity of SSD on peural sign was higher than that of axial thin-slice images. The sensitivity of VR on vascularnotch sign and lobulation was higher than that of axial thin-slice images. Conclusion The post-processing techniques of MSCT have high value on diagnosis of small peripheral lung cancer. More information could be collected when many kinds of post-processing techniques were used.