C.A.T. SCAN (Computerized Axial Tomography)
What is the test?
A C.A.T. scan uses an x-ray beam and a computer to provide very accurate
images of just about any organ or bone in your body. The C.A.T. scan takes
pictures of small layers or "slices" of the tissue being examined.
What preparation is needed?
Do not eat or drink for 4 hours before the test. However, you may take
water for routine medications. You must remove all metal objects and jewelry
before the scan begins. Metal, plastic, and other materials can interfere with
the x-rays.
How is the test done?
The scan itself is safe and painless. You will lie flat on a narrow
table, which will be moved inside a round opening of the scanner. The scanner
will make a clicking sound as it moves around you. The scan will take from 10
to 60 minutes, depending on how much of your body is studied. To take more
detailed pictures, the doctor may inject an iodine-based dye into one of your
veins during the scan. You may need to swallow a "Tang" drink that contains
dilute contrast in order to see your intestines better. You will be able to see
from inside the machine and talk to the staff outside through a special
intercom.
What can I expect after the test?
You may feel uncomfortable from having to lie still for long periods of
time. If you receive an injection of contrast (dye), you may notice a salty or
metallic taste in your mouth, and/or some mild nausea. You may notice the need
to urinate more frequently. Please drink non-caffeinated, non-alcoholic
beverages to replace body fluids. There are no after effects from the x-ray
itself. The total radiation it exposes you to is no more than a regular x-ray.
For more information contact the Medical Imaging Department at
315/470-7551.
