[Diagnostic evaluation of magnetic resonance urography in urinary tract dilatation and obstruction].

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.

CONCLUSION

MR urography is a reliable noninvasive method for depicting the urinary tract.