AHA/ASA Stroke Council Chair and volunteer expert, Peter D. Panagos, M.D., offers perspective (via Zoom) on ISC 20 presentation 57. He is professor, Emergency Medicine, Washington University School of Medicine in St. Louis, MO.
copyright American Heart Association 

"For those of you who have seen an MRI, experienced one or brought a family member to an MRI, you would be very familiar with the fact that these magnets are very powerful and strong. As a result, no metal can be anywhere within the room, and that has to do with the magnetic field. And these magnets are very large, and as a result, when you go through them, you actually go through a large tube. And for many people that will be a claustrophobic experience, as you have to remain in that tube for up to an hour in some cases, depending upon the imaging, and depend upon the body part and the sequences required. This technology, this portable MRI, is on wheels and it rolls in and out of rooms and it'll essentially just go over the head, kind of like a baggage cart-type size that will kind of roll in with a sensor that goes over the head and behind the head while you're lying in the bed. And it doesn't enclose the body, but it will be fairly close to your face and the back of your head, so you could could get a sense of being enclosed but overall you would not be within a tube like the standard MRI."