No, but I'm a biomedical engineer who has done a lot of work with CT/MRI. Just looking at a brain with MRI to see if it's "okay" is very odd (and may or may not be covered by insurance), but I assume you just simplified for the sake of the post? Did your doctor say exactly what they're looking for? Small brain discongruities aren't necessarily noticable unless you're looking specifically for them, so it'd be interesting to know what they're looking for to me personally Most contrast agents are completely safe, though, so that's not something to worry about. Assuming they'll use gadolinium (not an expert on head MRI but that's basically the most common agent), which has less than a 0.1% complication rate iirc