Magnetic resonance imaging (MRI) is a diagnostic procedure that uses a combination of a large magnet, radiofrequencies, and a computer to produce detailed images of organs and structures within the body. The MRI creates a magnetic field around you, then pulses radio waves to the area of your body to be pictured. The radio waves cause your tissues to resonate. A computer records the rate at which your body’s various parts (tendons, ligaments, nerves) give off these vibrations, and translates the data into a detailed, two-dimensional picture. MRI, a non-invasive way to look inside of the body, does not use ionizing radiation, unlike X-rays or computed tomography (CT scans). An MRI is helpful at diagnosing many common orthopedic problems. For example, the sensitivity of MRI in diagnosing an ACL tear is about 90%. MRI is the chosen method for imaging the soft tissues of the musculoskeletal system, such as ligaments, tendons and cartilage. These structures are most commonly injured during athletic and traumatic events. MRI can be also be used for imaging the spine, hip, shoulder, elbow, wrist, knee, ankle, and foot.