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Acute ureteric calculus obstruction: unenhanced spiral CT versus HASTE MR urography and abdominal radiograph

Departments of ¹ Imaging and ² Urology, Johns Hopkins Bayview Medical Center, 4940 Eastern Avenue, Baltimore, Maryland 21224, USA

View larger version (36K): [in a new window]   Figure 1. Accuracy of half-Fourier single shot turbo spin-echo (HASTE) MR urography/plain abdominal radiograph (MRU/KUB) compared with spiral CT in acute calculus ureteric obstruction.

View larger version (86K): [in a new window]   Figure 2. A 56-year-old female presented with acute right-sided flank pain caused by a right vesicoureteric junction calculus. (a) Axial CT shows evidence of hydronephrosis with but no evidence of significant stranding. (b) Axial MR, shows significant perirenal fluid (arrows). (c) MR urogram shows a dilated ureter to the level of the bladder. Gallbladder (G).

View larger version (72K): [in a new window]   Figure 3. A 46-year-old female patient with Crohn's disease presenting with acute right flank pain. (a) MR urogram shows a level of obstruction at the mid/distal third of the right ureter, and axial CT confirmed a distal ureteric calculus. (b) Retrograde pyelography demonstrates a calculus (arrow) above a distal ureteric stricture, and removed at ureteroscopy.