副肾动脉的多层螺旋CT评价

Evaluation of Accessory Renal Arteries on Multislice Spiral CT

目的：讨论多层螺旋CT（MSCT）显示副肾动脉（ARA）的能力。方法：MSCT行上腹部增强扫描100例，对比荆90～100ml，流率3ml／s。重建层厚2．5mm，间隔1.25mm，将数据传至工作站，行多平面重组（MPR）、最大密度投影（MIP）及客积再现（VR）处理。结果：回顾性薄层重组图像共显示ARA38侧，其中单侧26侧，双侧12例。后处理方法中，MIP图像显示ARA29例，18例患者VR图像显示了ARA解剖走行，MPR只能节段显示ARA。结论：MSCT回顾性薄层重组及三雏重组图像能够显示ARA，MIP是显示ARA大体解剖的最佳方法，两者结合，能够为血管造影术及外科手术前提供更多的解剖学信息。

Objective ： To discuss the capability of multislice spiral CT （MSCT） in displaying accessory renal arteries （ARA）. Methods.. MSCT were performed in 100 patients, with the volume of contrast agent administrated as 90- 100ml,injection rate 3ml/s, reconstruction thickness 2.5mm, interval 1.25mm. The acquired data were transferred to workstation and post-processed with multiple planar reformation （MPR）,maximum intensity proiection （MIP） and volume rendering （VR） techniques. Results：On the retrospective thin-slice reformationting and reconstruction images, ARA were clearly showed in 38 patients,with unilateral ARA in 26patients and bilateral ARA in 12 patients. Of all post-processing techniques applied, MIP demonstrated the major anatomy of ARA in 29 patients,VR showed the major anatomy of ARA in 18 patients,MPR partially showed ARA. Conclusion：ARA can be displayed by retrospective thin-slice reformatting and 3-dimensional reconstruction images of MSCT. MIP is the best technique in showing the major anatomy of ARA. MSCT in combination with MIP may provide more anatomical information before angiography and surgical operation.