When I was part of a study I had to go to a specific place to get my MRIs. They put the IV beforehand and used a remote control to inject the dye. I thought that was so cool.
Remember if you jerk around in you sleep like I do, don't take too much meds.

Or you may have to go back and have done again.

I lucked out that one time and I will never take more than 1 Ativan again.
Anyhow, good luck! I'll be praying for you.