Closed MRIs have been aroundlonger than open MRIs, and they use a capsule-like environment in which you lieto get high-quality images. A huge magnet and radio wave are used in the systemto send and receive signals to and from your body. Open MRIs are exactly whatthey sound like. They are open while still taking photographs of the inside ofyour body with magnets. The open MRI employs a magnet top and bottom and isopen on all four sides, rather than an enclosed capsule. These significantlyreduce the danger of claustrophobia and panic attacks, and allow patients ofdifferent shapes and sizes to undergo an MRI to effectively assess theirconditions.