磁共振尿路造影诊断小儿上尿路梗阻

Application of magnetic resonance urography in the diagnosis of upper urinary tract obstruction in children

目的 探讨磁共振尿路造影 (MRU)诊断小儿上尿路梗阻的价值。方法 2 7例上尿路梗阻患儿术前作IVU、BUS和MRU检查 ,MRU应用重T2 加权脂肪抑制快速自旋回波序列。对照分析MRU影像与手术结果 ,比较MRU与IVU、BUS在上尿路梗阻定位定性诊断中的作用。结果 MRU诊断肾盂输尿管连接部狭窄 12例 ,重肾双输尿管畸形 3例 ,原发性巨输尿管症 7例 ,输尿管膀胱入口狭窄 5例。MRU影像与手术结果完全一致 ,对上尿路梗阻的定位定性诊断正确率 10 0 % (2 7/2 7)。

Objective To study the diagnostic value of magnetic resonance urography (MRU) in upper urinary tract obstruction ( UUTO ) in children.Methods 27 children with UUTO were subjected to IVU,BUS and MRU preoperatively. The heavily T 2-weighted fat suppression turbo spin echo sequence was employed in MRU. The MRU data were analyzed and compared with surgical findings,and MRU results were compared with IVU and BUS in terms of defining both the nature and level of UUTO.Results With MRU,the diagnosis of stricture of ureteropelvic junction was established in 12 children,and duplication of renal pelvis and ureter in 3 children,primary megaloureter in 7 and narrowness of cystic inlet of ureter in 5. MRU findings were found to be completely consistent with surgical findings, with an accuracy of 100% in defining the nature and level of UUTO.Conclusion MRU is of great value in the diagnosis of upper urinary tract obstruction in children.