Can't do open MRI's on some body parts. There are technical limitations.
We had a real hullabaloo here when a ventilated ICU pt had an MRI a while back when we first got one. Had a heap of ICU nurses and doctors in the room, and they forgot to take their metal stuff off. Had badges and all sorts of stuff flying around the room!

One doc had his wallet in his pocket and all his credit cards got wiped!
Did they pipe you some nice music to drown out all the clanking noises, Bill?
CAT scan is a piece of cake compared to MRI. Chambers are bigger. Hope all goes well for ya Bill.
Cheers
Mick