Closed bore MRIs have a small opening of around 60cm, which can cause claustrophobia. They provide excellent image quality due to their high magnet strength between 1.0T and 3.0T. Open MRIs have openings on three to four sides, allowing larger or claustrophobic patients to fit more comfortably, but have lower magnet strengths between 0.35T to 1.2T, resulting in lower image quality. Wide bore MRIs combine the benefits of closed and open bore MRIs, with a larger 70cm opening and magnet strengths providing high quality images in shorter times.