Contrast Agents in Renal Insufficiency

I know IV CT contrast (iodinated agents) are bad for the kidneys but other things seem to be a gray line. Can someone weigh in on the following. Assume the patient is CKD3B plus. I know w/ ESRD with dialysis you can just dialyze it out if the imaging isn't urgent. 1.) Oral CT contrast? 2.) Gadolinium (MRI) contrast?
Source: Student Doctor Network - Category: Universities & Medical Training Authors: Tags: Internal Medicine and IM Subspecialties Source Type: forums