Diagnostic Value of MR Urography in Ureteral Obstruction in Children

VernacularTitle:磁共振尿路造影在小儿泌尿系梗阻诊断中的价值
Author: Jun ZHANG ; Xiaoan ZHANG ; Xin ZHAO ; Qingna XING
Publication Type:Journal Article
Keywords: urinary tract obstruction; child; MR urography; intravenous pyelography; ultrasound
From: Journal of Practical Radiology 2010;26(1):94-96,105
CountryChina
Language:Chinese
Abstract: Objective To study the diagnostic value of magnetic resonance urography (MRU) in the urinary tract obstruction(UTO) in children.Methods 65 children with UTO underwent intravenous pyelography(IVP),B-ultrasound(BUS) and MR urography(MRU) ,MRU using hearvily T_2-weighted fat suppression turbo echo sequence.MRU features were compared with that of operation.The accurate rate in diagnosis of UTO with MRU was analysed comparatively with that of IVP and BUS.Results The lesions diagnosed with MRU included stricture of ureteropelvic junction in 36 children,and duplication of renal pelvis in 3 children (diagnostic error in 1),primary megaloureter in 9,narrowing of cystic inlet of ureter in 4,cysts of cystic inlet of ureter in 3,solitary kidney in 2,nephrolith in 5,nervous bladder in 2 and congenital renal dysplasia in 1.The accuracy was 98.5% in defining the UTO with MRU(64/65),which was superior to that with IVP and BUS(P＜0.05).Conclusion MRU is of great value in the diagnosis of upper urinary tract obstruction in children.