多层螺旋CT后处理技术对肝癌动脉的显示价值

目的：探讨多层螺旋CT后处理技术对于肝癌动脉的显示价值。方法：173例肝癌患者中，男131例，女42例；年龄33～82岁。采用多层螺旋CT机进行增强扫描。将动脉期图像数据以多平面重建、最大密度投影及容积再现等模式对血管进行显示分析。曲面重组和曲面最大密度投影技术也被应用。结果：在评价肝动脉解剖识别方面，容积再现技术和最大密度投影显著优于多平面重建（P〈0．001），且容积再现技术优于最大密度投影（P〈0．001）。在评价肿瘤病灶供血动脉方面，最大密度投影显著优于多平面重建和容积再现技术（P〈0．001），且容积再现技术优于多平面重建（P〈0．05）。在评价肿瘤血管的连续性和血管形态方面，MIP优于VRT（P〈0．001）；MIP优于MPR（P〈0．001）；VRT优于MPR（P〈0．001）。结论：多层螺旋CT血管成像技术是一种重要的对肝癌供血动脉的评价方法。MIP为评价肝脏血管的最佳模式，有助于外科手术和介入治疗。

Value of multi-slice spiral CT angiography in displaying liver cancer artery

Objective：To discuss the value of the multi-slice spiral CT in displaying the feeding artery of liver cancer. Methods：Of 173 eases with liver tumor, 131 were male, 42 were female, aged from 33 to 82 years old. Multi-slice spiral CT enhanced scanning was performed in each ease. Arterial phase vascular images were reconstructed, using multi-planar recoustruetions （MPR）, maximum intensity projection （MIP） and volume rendering tecimique （VRT）. Curved planar reconstructions（CPR） and curved maximum intensity projection （cMPR） were used too. Results：With respect to identitying hepatic artery, VRT had strong three-dimentlonal effect, being superior to MIP （ P 〈 0.001） and MPR （ P 〈 0.001）. MIP was superior to MPR （ P 〈 0.001）. VRT was superior to MPR （ P 〈 0.001）. As for displaying the tumor artery, MIP was superior to VRT （ P 〈 0.001） and MPR （ P 〈 0.001）. VRT was superior to MPR （ P 〈 0.05）. Conclusion：Multi-slice spiral CT angiography is a very important technique for evaluating feeding arteries of liver cancer. MIP is the one of the best technique. This will provide useful information for surgical operation and interventional therapy.