Download COMPUTED TOMOGRAPHY (CT OR CAT) SCAN What is a CAT

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COMPUTED TOMOGRAPHY (CT OR CAT) SCAN
What is a CAT scan?
A computerized (or computed) tomography
(CAT or CT) scan is a special type of x-ray.
Although a CAT scan is used to get images of
many parts of the body, let's use the example
of the heart. A traditional x-ray shows twodimensional images of the heart—its length and
width. But a CAT scan uses an x-ray machine
that moves around your body and takes
multiple images of the heart. As small amounts
of x-rays pass through your body, different
types of tissue absorb different amounts of the
x-rays. This helps provide a more precise
image compared to a traditional x-ray.
The CAT scan images are viewed together
on a video monitor, offering a threedimensional view—length, width, and depth. Because it is a three-dimensional
image, a CAT scan offers a much better picture of the entire heart than a
traditional two-dimensional x-ray can.
A CAT scan is used to detect many health conditions—tumors, for example, or
bone problems like osteoporosis. As it relates to heart and blood vessel disease,
a CAT scan is often used to identify:
• Some types of heart disease, such as heart failure
• A blood vessel blockage or blood clot
What can I expect?
When you have a computed tomography (CAT) scan, you typically undress and
put on a hospital gown or sheet. You lie on an exam table. As the test begins,
the table slowly moves inside a doughnut-shaped machine.
Sometimes you receive a contrast dye—usually through an intravenous (IV) line
that is put into your arm. The dye allows your heart or blood vessels to show up
as images on a monitor. For instance, if the test is being done to look at your
blood vessels, the dye makes them visible—almost like roads on a map. You
might notice some effects from the dye:
• Warm flushing feeling, and maybe nausea, for a minute or so
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•
Metallic taste when the dye reaches the blood vessels in your mouth
The technician asks you to hold your body still during the scan. Sometimes
pillows and/or straps help you stay in the same position. As the x-ray tube rotates
around your body, the table slowly moves through the machine. You might be
asked to hold your breath at certain times during the scan. Although the CAT
scan is generally not a painful test, you may feel uncomfortable from having to lie
in one position during the test—anywhere from 15 to 60 minutes.
Important Safety Information
Medications, procedures and tests can have some risks and possible side effects. Results may vary
from patient to patient. This information is not meant to replace advice from your doctor. Be sure to
talk to your doctor about these risks and possible side effects.
Boston Scientific is a trademark and HEARTISTRY is a service mark of Boston Scientific Corporation.
CAT Scan
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