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- Title
MR pyelography and conventional MR imaging in urinary tract obstruction.
- Authors
Catalano, C.; Pavone, P.; Laghi, A.; Scipioni, A.; Panebianco, V.; Brillo, R.; Fraioli, F.; Passariello, R.
- Abstract
<bold>Purpose: </bold>To evaluate the possible role of MR imaging in the assessment of patients with urinary tract obstruction by combining conventional MR imaging and MR pyelography (MRP).<bold>Material and Methods: </bold>Forty-three patients with dilated upper urinary tract were studied with a high gradient strength 0.5 T magnet. Respiratory compensated T1-weighted, SE and T2-weighted TSE sequences were acquired in all patients. MRP images were obtained by using a respiratory compensated 3D T2-weighted TSE sequence. MRP images were reconstructed with a MIP algorithm. In all cases, urography and/or ascending pyelography were also performed. Images were independently evaluated by two radiologists.<bold>Results: </bold>The dilated tract ureter and the level of the obstruction could be correctly demonstrated in all cases. The cause of the obstruction was correctly demonstrated by examiner 1 in 90% and by examiner 2 in 88%. The interobserver agreement was high with a kappa-value of 0.96.<bold>Conclusion: </bold>In cases of obstructive hydroureteronephrosis MR imaging, combining MRP and conventional sequences, can be proposed as an accurate technique in the assessment of level and cause of obstruction.
- Subjects
MAGNETIC resonance imaging; URINARY obstructions; HYDRONEPHROSIS; DIGITAL image processing; URETERIC obstruction; URINARY calculi
- Publication
Acta Radiologica, 1999, Vol 40, Issue 2, p198
- ISSN
0284-1851
- Publication type
journal article
- DOI
10.3109/02841859909177738