Diagnosis Significance of MRU in Ureteral Obstruction of Children

Objective To compare and evaluate diagnostic role of various imaging manifestation in the urinary tract obstruction. Methods 23 cases with urinary tract obstruction underwent B-ultrasound scanning, intravenous phelography(IVP), retrograde urography, CT scanning and magnetic resonance urography (MRU), and their findings were compared. Results B-ultrasound showed hydronephrosis in 15 cases of them, IVP provide for poor renal image in 7 cases. CT showed hydronephrosis in all 8 examined cases. MRU produced a good image in all cases. Conclusions Both B-ultrasound and IVP can be used as a first choice imaging for diagnosis of ureteral obstruction, MRU has the advantages of non-invasiveness, no ionizing radiation and could show the nonfunctional renal collecting tubules system.So it has important diagnotic value in congenital urinary tract obstruction of children.