Click on image to view larger version.
Figure 6. A 52-year-old woman with temporary ureteral obstruction caused by blood clots. (a) Coronal maximum intensity projection (MIP) excretory MR urography and (b) complementary retrograde pyelography show complete proximal ureteral obstruction (arrow) and mild dilatation of the collecting system. (c) Axial gadolinium-enhanced T1 weighted gradient-echo and (d) T2-weighted turbo spin echo (TSE) images demonstrate hypointense tissue filling completely a mildly dilated ureter (arrowhead). (e) After several days, excretory urogram from conventional intravenous pyelography demonstrates patency of previously occluded ureter (arrowheads).
