My surgeon did a rectal exam to diagnose the stricture. Mine was right where the j pouch is connected to the anus so he was able to dilate (break up the scar tissue) with his finger. If the stricture was up higher then they usually do a procedure for it. Did your surgeon ever do a rectal exam to check? I don't think that a stricture that low would show up on a scan. But who knows...maybe it would.