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Closed MRIs have beenaround longer than open MRIs, and they use a capsule-like environment in whichyou lie to get high-quality images. A huge magnet and radio wave are used inthe system to send and receive signals to and from your body.Open MRIs are exactlywhat they sound like. They are open while still taking photographs of theinside of your body with magnets. The open MRI employs a magnet top and bottomand is open on all four sides, rather than an enclosed capsule. Thesesignificantly reduce the danger of claustrophobia and panic attacks, and allowpatients of different shapes and sizes to undergo an MRI to effectively assesstheir conditions.