That's interesting how they do the MRI's in the USA. So far, my experience in Canada is that I have the MRI's without contrast, the radiologist has a quick look at the result, then if something (new) has shown up in a specific area, they put in the contrast and do the second ones right then. Hmmm.....

As far as I know, the contrast is to determine if the new lesions are active or not.

With love, Erika