is the test?
- MRI is a noninvasive technique for visualizing many different
body tissues. Unlike x-rays, MRI does not use any radiation.
Instead, it uses radio waves, a large magnet, and a computer
to create images.As with a CT scan (see page 23), which does
use x-rays, each MRI picture shows a different
"slice," or cross-section, of the area being viewed. Because
these slices usually are spaced about a quarter-inch apart, your
doctor can get a detailed representation of a particular area.
An MRI of the spine reveals any abnormalities in the vertebrae,
vertebral discs, nerves, spinal cord, and muscles.