摘要
目的:探讨双流率一期扫描法在供肾血管评价中的应用价值。方法:将48例活体供肾者分为Ⅰ(21例)、Ⅱ(15例)、Ⅲ(12例)三组进行肾血管成像检查,每组采用不同的扫描方法,分别为自动触发扫描、固定时相扫描和双流率一期扫描,再采用容积再现(VR)、最大密度投影(MIP)和曲面重组(CPR)等后处理技术进行肾动、静脉重建。对三组肾血管图像质量进行评价。结果:对三组间肾动脉和肾静脉的CT值均数分别作单因素方差分析,三组间肾动脉和肾静脉的CT值差异均有统计学意义(P<0.05);肾动脉的CT值均值比较,Ⅰ组>Ⅱ组>Ⅲ组;肾静脉的CT值均值比较,Ⅰ组>Ⅲ组>Ⅱ组。对三组肾静脉图像质量进行非参数秩和检验,各组间不同等级图像的构成比差异有统计学意义(P<0.05),即图像质量存在差异;两两比较,Ⅰ、Ⅱ组间及Ⅱ、Ⅲ组间差异有统计学意义(P<0.05),Ⅰ、Ⅲ组间差异无统计学意义(P>0.05)。按照肾动、静脉差值的高低,将Ⅲ组肾静脉的图像质量分为良好、一般及较差三个级别,各级别例数分别为6、4和2例。结论:双流率扫描法可实现一期扫描完成肾动、静脉检查,能有效降低受检者接受的辐射剂量,并可获得较理想的动、静脉融合图像,满足诊断要求,
Objective：To study the value of one-phase scan with dual flow rate technique in the preoperative evalua- tion of renal blood vessels in living donor. Methods： 48 living renal donors were divided into 3 groups：Group Ⅰ （n= 21）, （Group Ⅱ （n= 15） ,Group Ⅲ （n= 12）. CT angiography （CTA） with different techniques including auto touching off in the early artery phase, settled time at the arterial phase and venous phase and one phase scan with dual flow rate technique was performed in different groups separately. Post-processing techniques including VR,MIP,CPR were used to reconstruct the renal artery and vein and the image quality of these 3 groups were compared and analyzed. Results： The mean CT values of renal arteries and veins of the 3 groups were analyzed statistically, showing significant statistical differences （P〈0.05）. The mean CT values of renal artery of the 3 groups showed Group Ⅰ 〉Group Ⅱ 〉Group Ⅲ ;which of renal vein showed Group Ⅰ 〉Group Ⅲ 〉 Group Ⅱ. The image quality of renal vein of these 3 groups were analyzed with Rank sum test showing that significant difference was existed in proportion of different grades among these three groups （P〈 0. 05）, which means that difference of the image quality of renal vein were showed. Comparison of the image quality in each separated two groups,significant difference was showed between Group I and Group Ⅱ ; Group Ⅱ and Group Ⅲ （P〈0.05）. No statisti cally significant difference was found between Group Ⅰ and Group Ⅲ. According to the differences of CT value of renal ar- tery and vein,the image quality was scored as good,fair and poor,showing that there were 6 cases,4 cases and 2 cases in each grade. Conclusion： Examination of renal artery and vein can be completed using dual-flow rate scanning with one-phase scan technique,and radio-exposure received by living donors could be greatly reduced,also ideal images could be obtained and requirement for diagnosis could be satisfied.
出处
《放射学实践》
2013年第1期55-58,共4页
Radiologic Practice
关键词
体层摄影术
X线计算机
肾移植
肾动脉
肾静脉
Tomography,X-ray computed
Kidney transplantation
Renal artery
Renal veins
