MSCT血管成像及其后处理技术对下肢静脉病变的诊断潜能

目的探讨多层螺旋CT（MSCT）血管成像及其图像后处理技术诊断下肢深静脉病变的潜能。方法23例临床疑诊下肢深静脉病变患者（男17例，女6例；年龄47～76岁，平均61岁）均经MSCT血管成像及在AW4．2影像工作站上进行的血管成像后处理。对各种后处理技术显示下肢深静脉病变的潜能进行了对比分析。结果容积重建（VR）、最大密度投影（MIP）、多平面重建（MPR）以及CT仿真内窥镜（CTVE）对下肢静脉瓣膜异常（n=15）的显示优于曲面重建（CPR）；MPR和CTVE对下肢静脉血栓（n=5）的显示优于CPR、VR及MIP；VR、MIP、MPR以及CPR对下肢静脉瘤样扩张（n=8）的显示优于CTVE。结论MSCT各种成像技术的联合应用可为下肢深静脉病变的确诊提供可靠依据。在几种图像后处理技术中，MPR具有较高的诊断潜能。

The potency of MSCT angiography and its imaging postprocessing techniques for diagnosing lower limb deep vein lesions

Objective To explore the potency of MSCT angiography and its imaging postprocessing techniques for diagnosing lower limb deep vein lesions. Methods Twenty-three patients （17 men, 6 women; aged 47-76 years; mean age, 61 years） with clinically suspected lower limb deep vein lesions underwent MSCT angiography and imaging postprocessing reconstructions on AW4.2 workstation. The potency of several postproeessing techniques for visualizing lower limb deep vein lesions was comparatively analyzed. Results Volume rendering （VR）, maximum intensity projection（MIP）, muhiplanar reconstruction（MPR）, and computed tomography virtual endoscopy（CTVE） for visualizing the intravenous valve abnormalities（n=15） were superior to craved plannar reeonstruction（CPR）; MPR and CTVE for visualizing the intravenous thrombi（n=5） were superior to CPR, VR and MIP; VR, MIP, MPR and CPR for visualizing the tumor-like dilatations of the lower limb deep veins were superior to CTVE. Conclusion The combined application of MSCT angiography and its several postprocessing techniques can provide the reliable evidence for definitely diagnose lower limb deep vein lesions. Relatively speaking, MPR has higher diagnostic potency than other postprocessing techniques.