Beth,

I've had three MRIs -- one of my knee and two of my head.
(The knee test left my head out side the machine, the first head test was in an open MRI machine, the second head test was tight and cramped but I was not bothered).

The worst thing about the MRI is having to be still. The techs are very clear that you cannot move during the test.
Find out a head of time how long the test lasts.

Sometimes the tech will ask you what radio station you want to listen to.
The tech will be in another room and will be able to talk and listen to you during the test.

The machine makes lots of noise. It sounds like banginng most of the time.

I did not feel anxious or claustrophobic but by the time I took the third (tight) test I knew what to expect.

Good luck.
It will be good to get some answers.

M.