Warning about barium CT scans: My doctor ordered a non-contrast abdominal CT scan. The imaging center said "we always use contrast." I should have objected, said "call my doctor," remembered that I put nothing in my mouth I am not sure is gluten free. Didn't, and obediently drank the 2 bottles of Vanilla Silq, I think each 8-12 ounces. About 60 minutes later...