Test Overview
A computed tomography (CT) scan uses
to make detailed pictures of structures inside
of the body.
During the test, you will lie on a table that is
attached to the CT scanner, which is a large doughnut-shaped machine. The CT
scanner sends X-rays through the body area being studied. Each rotation of the
scanner provides a picture of a thin slice of the
or area. All of the pictures are saved as a
group on a computer. They also can be printed.
In some cases, a
dye called may be used. It may be put in a vein () in your
arm, or it may be placed into other parts of your body (such as the
or a joint) to see those areas better. For some
types of CT scans you drink the dye. The dye makes structures and organs easier to see on the CT
pictures.
A CT scan can be used to study all parts of your
body, such as the chest, belly, pelvis, or an arm or leg. It can take pictures
of body organs, such as the liver,
,
,
,
,
, lungs, and heart. It also can study
blood vessels, bones, and the spinal cord.
CT
is a special test that is not widely available. It uses a steady beam of X-rays
to look at movement within the body. It allows the doctor to see your organs
move or to guide a
needle or other instrument into the right place
inside your body.