The American: College of Radiology considers a GFR of 30-40 "at risk" (http://www.acr.org/quality-safety/resources/contrast-manual). Consideration should be given to alternative tests. If risk/benefit analysis warrants MRI, certain contrast agents should be avoided, and the lowest possible dose of contrast should be utilized. Talk to your doc about it.
Answered 5/24/2015
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