NMRI. A procedure in which radio waves and a powerful magnet linked to a
computer are used to create detailed pictures of areas inside the body. These
pictures can show the difference between normal and diseased tissue. NMRI
makes better images of organs and soft tissue than other scanning techniques,
such as CT or X-ray. NMRI is especially useful for imaging the brain, spine,
the soft tissue of joints, and the inside of bones. Also called magnetic
resonance imaging (MRI).