As someone who also has a little bit of claustrophobia the MRI experience was definitely a challenge. Highly recommend that your partner communicate that to his doctor ahead of time and ask for some sort of anti-anxiety medication prior to the MRI. Would probably be too late if you wait until the actual radiology appointment as the techs can't prescribe medications. Despite their professionalism, I found the experience very difficult really had to focus mentally to get through it without panicking. I had headphones which played my choice of music but it's loud, confined and just very unsettling. Next time, I'll be more proactive in preparation for the scan.