Not everybody gets that claustrophobic feeling.
I have had MRI’s and CAT Scans and even had my entire head locked motionless in a closed box while getting a MRI.
They even gave me a button I could push if I felt that way, so they would stop the procedure, but I was fine....................
Sounds miserable. My last mri was slated for something like an hour session. After 20 min I crawled out and said no more. Not a total nut-/just too quiet and too much sensory deprivation.