CTA with thin slices and long coverage
60-year old female with persistent hypertension 1 month after placement of an aorto-bi-iliac graft and a separate graft from the right iliac graft to the left renal artery. CTA with SSHCT cannot be done with narrower collimation than 3 mm over larger anatomic volumes. MSHCT with 1 mm slice width can be done covering the whole abdomen.
CT findings:
Top SSD shows the iliac grafts (dashed arrows) and the left renal graft (arrowhead). Bottom Severe right renal artery stenosis (arrow), seen only in 20 degree oblique MIP, was missed on pre-op conventional arteriograms.
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