title: [Diagnostic evaluation of magnetic resonance urography in urinary tract dilatation and obstruction].
abstract: OBJECTIVE
  To evaluate the diagnostic value of magnetic resonance urography (MRU).
  
  
  METHODS
  Two hundred and one patients were examined, 92 patients with urinary tract dilatation using a modified, heavily T2-weighted fast spin-echo pulse sequence and fat-suppression pulse aid. Postprocedure processing was performed with a maximum-intensity-projection (MIP) algorithm.
  
  
  RESULTS
  In the 92 patients with urinary tract dilatation, 86 had obstructive urinary tract dilatation 6 non-obstructive urinary tract dilatation. In the 86 patients, 14 had ureteral carcinoma, 19 calculus, and 13 benign stricture, 23 congenital ureteral stricture/or with anomalies, 7 ureteral obstructive caused by extrinsic pelvis disease, and 10 bladder carcinoma involved ureter. In the 6 patients, 5 had nervous bladder. MR urography provided the high-resolution image of the urinary tract and determined the presence of obstruction.
  
  
  CONCLUSIONS
  MR urography is a reliable noninvasive method for depicting the urinary tract.
authors.affiliation: Department of Radiology, China-Japan Friendship Hospital, Beijing.
authors.forename: Y
authors.initials: Y
authors.lastname: Lu
authors.forename: W
authors.initials: W
authors.lastname: Hong
authors.forename: L
authors.initials: L
authors.lastname: Lu
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002648:Child; D002675:Child, Preschool; D003251:Constriction, Pathologic; D004106:Dilatation; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D014513:Ureter / Q000473:pathology*; D014516:Ureteral Neoplasms / Q000175:diagnosis*; D014570:Urologic Diseases / Q000151:congenital / Q000175:diagnosis*