@nancy4058
Being a long term cancer survivor both my surgeon and oncologist prefer contrast, simply because it makes abnormalities easier to notice. (or so I'm told)
Also I recently failed a Heart Cath procedure because of lack of visual detail, due to using minimal amount of contrast... But a few days later I had open heart surgery to replace 3 plugged arteries. Stents would have probably not done very well anyway as all of them were more than 90% occluded.
So I question contrast every time I have a procedure and turn it down each time they can do without it.