With the 5 MRIs so far, I haven't been stressed by the proceedure. During the first one, I learned that I must remain as alert as possible because if I doze off, the body goes into jerks and spasms which mess everything up. That only makes the whole process take longer.
To stay awake, I go through visualizations that the magnets are somehow clearing the inflammation and halting the progression...that way the sound effects are supportive rather than distracting.