摘要
目的:探讨动脉晚期CT血管成像(CTA)结合图像融合技术在肾静脉系统评估中的价值。方法:46例超声提示肾占位性病变的患者和5例活体供肾者行CT平扫和动脉早期、晚期及实质期三期动态增强扫描。利用动脉晚期的数据进行肾静脉图像重组、动脉早期的数据进行肾动脉图像重组,并将两组图像融合在一起。分析CTA结合图像融合技术对评价肾静脉系统的价值。结果:动脉晚期CTA结合图像融合技术能清楚地显示肾静脉主干的变异,包括环主动脉左肾静脉、腹主动脉后左肾静脉及多条右肾静脉,其显示率分别为15.7%、2.0%和31.4%。且能准确显示肾静脉属支,包括左肾上腺静脉、左性腺静脉、汇入左肾静脉的腰静脉、汇入右肾静脉的右肾上腺静脉及右性腺静脉,其显示率分别为88.2%、88.2%、62.7%、3.9%和2.0%,与利用动脉晚期原始图像结合多平面重组对肾静脉系统的显示情况完全一致。实质期对显示细小属支和交通支有补充作用,对肾静脉的显示明显差于动脉晚期,但两者间差异无显著性意义(P>0.05)。结论:动脉晚期CTA结合图像融合技术不仅能清楚显示肾静脉系统的整体解剖,且能同时显示动静脉系统的解剖信息,在肾脏病变的术前评估中有重要价值。
Objective：To investigate the value of late arterial phase CT angiography （CTA） with fusion miaging technique （FIT） in assessing renal venous system. Methods：Forty-six patients with detected renal lesion by ultrasonic examination and 5 potential living renal donors underwent the plain scan and triphasic dynamic contrast-enhanced scan. The acquired data sets were transferred to GE Advantage Workstation 4.2 for CTA reconstruction with the software packages of Volume Viwer 2. The CTA images of renal veins with late arterial phase data and renal arteries with early arterial phase data were fused together in volum rendering （VR） mode. The renal vein was further assessed on the parenchymal phase images combining with multiplannar reconstruction （MPR）. All the images were assessed by two chief radiologists to investigate the advantages of late arterial phase CTA with fusion imaging technique in assessing renal veins. When discrepancies were found between the two reviewers,consensus was obtained by discussion. Results： Renal venous system was demonstrated clearly on the late arterial phase VR images with FIT,which was in coincident with the visualized on raw images with MPR. The anomaly of renal vein trunk includes circumaortic left renal vein, retroaortic left renal vein and multiple right veins, the depiction rate of which is 15.7% .2.0% and 31.4% respectively. The depiction rate of left adrenal vein,left gonadal vein,lumber vein drainaging into left renal vein, right adrenal vein and gonadal vein drainaging into right renal vein is 88.2 %. 88.2 %. 62. 7% ,3.9% and 2.0% ,corresponding to 92.2% ,94.1% ,66.7% ,3.9% and 2.0% in parenchymal phase respectively. No statistical significance was found between these two groups （P〉0.05）. The image quality of late arterial phase images was remarkablely superior to that of parenchymal phase iamges. Conclusion：The late arterial phase VR iamges with FIT can not only accurately demonstrate the renal vein anatomy, but also demonstrate the renal viens and arteries simultaneously,which helps to understand the anatomic corrrelation of renal veins and arteries.
出处
《放射学实践》
2007年第7期718-722,共5页
Radiologic Practice
