I had a breast MRI. I was told how I would be placed by a friend, so as they told me I would be face down, I just went with it. They offered a headset and music, but I said no. I first just got as comfortable as the position let me and their guidelines I was given. Do not move. What i ended up doing was listening. The clinks, the clanks and all the sounds the machine made. I thought of the engineers who created the contraption the doctor wanted that would help them see inside our bodies. I think the music could fade the sound I liked, so of ccourse doing that or what triciaot suggest is good. But most important is staying still.
I also lastly, said in my head many times that is I stay still I will not have to do this again.