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Ultra Fast CT - 3D Reconstruction - Virtual Colonoscopy
A CT scan ("cat scan") is an x-ray technique that uses a computer to
create cross-sectional (or slice-like) pictures of the heart.
How does it work?
The CT scanner is a large X-ray machine that has a short, open-ended
tube in the middle (like a very short tunnel). The patient lies on a
scanning table, which slides through the middle of the CT scanner.
The CT scanner takes many x-ray pictures of thin slices of your
heart. A computer then puts these images together to make one
detailed picture. In some cases, a contrast dye is injected into the
bloodstream to help doctors get a clearer picture.
What should I expect?
If a contrast dye
is not
going to be used during your CT scan, you should not eat for about 2
hours before the test. If a contrast dye
is
going to be used, you should not eat for about 4 hours before the
test. The contrast dye may cause hot flushing in some patients.
You will be asked to undress and put on a hospital gown. Then, you
will lie down on a table, which will be slowly moved through the
hollow center of the CT scanner. You will be asked to lie still and
to hold your breath briefly as each picture is taken.
After the test, you may go about your normal activities. Some people
find that they have a bad reaction to the contrast dye, but this is
rare. If this happens, you will be treated at the hospital after
your test.
CT scanning is a safe test. Although your exposure to radiation is
small, you should not have a CT scan if you are pregnant.
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