Meindl Thomas, Coppenrath Eva, Degenhart Christoph, Müller-Lisse Ulrike L, Reiser Maximilian F, Müller-Lisse Ullrich G
Department of Clinical Radiology, University Munich, Ziemssenstr 1, 80336, Munich, Germany.
Eur Radiol. 2007 Oct;17(10):2512-8. doi: 10.1007/s00330-007-0600-7. Epub 2007 Feb 14.
The benefit of multidetector computed tomographic urography (MDCTU) for visualising early and late excretory phase (EP) upper urinary tract (UUT) opacification has been studied. UUT opacification was retrospectively evaluated in 45 bi-phasic four-row MDCTU examinations. The UUT was divided into intrarenal collecting system (IRCS), proximal, middle and distal ureter. Two independent readers rated opacification: 1, none; 2, partial; 3, complete. Numbers of segments and percentages of UUTs at each score were calculated for each EP and two EPs combined. Results of a single EP and of combined EPs were compared by Wilcoxon matched-pairs signed-ranks. IRCS and proximal ureter were at least partially opacified in each EP in >95%. The middle ureter was at least partially opacified in the early and late EP in 85% and 93%, respectively. The distal ureter was opacified in 65% (49/75) in the early EP and in 78% (59/75) in the late EP. Combining two EPs, non-opacified distal segments decreased to 9% (7/75). Significant improvement between a single EP and combining two EPs were found for the middle and distal ureter (P < 0.03). Bi-phasic MDCTU substantially improved opacification of the middle and distal ureter. IRCS and proximal ureter are reliably opacified with one EP.
多排螺旋计算机断层扫描尿路造影（MDCTU）对观察早期和晚期排泄期（EP）上尿路（UUT）显影的益处已得到研究。对45例双期四排MDCTU检查的UUT显影情况进行了回顾性评估。UUT分为肾内集合系统（IRCS）、近端、中段和远端输尿管。两名独立阅片者对显影情况进行评分：1分，无显影；2分，部分显影；3分，完全显影。计算每个排泄期及两个排泄期合并时各评分下UUT节段数及百分比。采用Wilcoxon配对符号秩检验比较单个排泄期和两个排泄期合并后的结果。在每个排泄期，IRCS和近端输尿管至少部分显影的比例均>95%。中段输尿管在早期和晚期排泄期至少部分显影的比例分别为85%和93%。远端输尿管在早期排泄期显影率为65%（49/75），在晚期排泄期显影率为78%（59/75）。两个排泄期合并后，未显影的远端节段降至9%（7/75）。中段和远端输尿管在单个排泄期和两个排泄期合并之间有显著改善（P<0.03）。双期MDCTU显著改善了中段和远端输尿管的显影。一个排泄期即可可靠地显示IRCS和近端输尿管。
