Gadolinium is an injectable agent used for MRI exams. It makes certain structures more visible on an MRI. Gadolinium is generally very safe with very few side effects. MRI contrast is much different than CT dye and is unrelated chemically to CT dye. If you have had CT dye in the past, and experienced a reaction of some type, MRI dye is not known to causes similar reactions. If you are concerned about your exam with MRI contrast we suggest you discuss this with your referring doctor. They can explain the benefits of doing the exam with contrast and why you should consent to this procedure.