With the help of computer processing, cross-sectional images of tissues are created as "slices" that can be viewed in any orientation.Īn MRI exam causes no pain and, importantly, the electromagnetic fields produce no known tissue damage of any kind. The signals are specially characterized using the rapidly changing magnetic fields. The applied radio waves then interact with these protons to produce signals that are picked up by a receiver within the MR scanner. The powerful magnetic field aligns atomic particles called protons that exist in body tissues that contain water.
Instead, MRI uses a powerful magnetic field, radio waves, rapidly changing magnetic fields, and a computer to create images that show whether there is an injury, disease process, or abnormal condition present.įor the MRI exam, the patient is placed inside of the MR system or scanner-typically a large donut-shaped device that is open on both ends. Magnetic resonance imaging, or MRI, is a way of obtaining detailed images of organs and tissues throughout the body without the need for x-rays or "ionizing" radiation.
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