For me a panic attack was a full-blown, overwhelming feeling of dread. I felt like someone who was being attacked by a killer. I could not do anything but scream and was unable to run. I would not want one of those in an MRI. I did almost get stuck in one once. I was so big I was scraping the sides when I went in. I felt like a sardine in a can. When they tried to get me out, they were having a problem with me not coming out. They were very reassuring and manipulated me enough to get me out. Fortunately my meds were working to keep me from panicking. I find the better my depression is under control, the better my anxiety is under control. Yes @jimhd prayer does always help me.