Figure 3c. Typical CT angiographic appearance of AA: phase 2—treatment planning (same patient as in Fig 2). (a, b) Paraaxial (a) and parasagittal (b) curved MPR images allow evaluation of vessel diameter at the stenosis (line 1) and in the distal segment (line 2) of the SMA (7 mm). (c-e) Locations of the resulting orthogonal cuts are shown in c and d; e displays the length of the segment requiring percutaneous treatment (18 mm). The ostial diameter is not well assessed because of the proximity of the stenosis. The patient experienced relief from symptoms after placement of a balloon-expandable, 31-gauge stainless-steel 7 x 22-mm stent.