Evaluation of MRU and Spiral CT in the Diagnosis of Ureteral Disease

Objective To dicuss the diagnostic value of MRU and spiral CT in ureteral disease.Methods MRU and SCTU were performed in 24 cases with ureteral disease including 9 cases of ureteral calculus,5 carcinomas,9 stenosis,and 1 malformation.Result (1)On SCTU,the location and diameter of 9 ureteral calculus (8 radiolucent,1 radiopaque)enlargement of renal pelvis and ureter were displayed.(2)Irregular uretral wall,local rarefieation or bostruction of contrast medium in ureter were detected in 5 cases of tumou in which rectums were narrowed gradually, in 7 cases of simple ureteral stemosis without thickening of the wall.(3) 1 malformation with double renal pelvis and ureter was demonsstated on MRU urinary tract dilatations at different levels clearly visualized in all the cases of impaired renal function.Conclusion (1)SCTU is supperior to IVU and conventional CT by improving diagnosis of ureteral disease.(2)MR urography would be reneal important imformations which might not be obtained by IVU.