back in 1984 when mri's were fairly new, I went to get my first mri back then they had to keep the mri room at about 40 degrees, the mri operators apologized for the wait because the a/c system couldn't keep up and they were doing repairs I could smell burnt wiring through the whole deal, claustrophobia was certainly setting in, I kept thinking any minute this thing will be on fire, but maybe even worse was several years later I got an mri with no a/c and no fan, must have been 90 degrees in there and claustrophobia certainly set in, but I rode it out, Dr. ask about how my mri went when I told him about the heat & feeling of claustrophobia, he got pissed said a few curse words then said they have direct orders to never put anyone in that tube without proper cooling and air circulation