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Computed
Tomography (CT)
Computed Tomography (CT) scanning is a rapid, painless
diagnostic examination that combines x-rays and
computers. A CT scan allows the radiologist to see the
location, nature, and extent of many different diseases
or abnormalities inside your body.
Multiple low-dose x-rays are taken in sequence by a
rotating x-ray tube. All you need to do is lie still on a
table for approximately 10-30 minutes. The table will
move
you through a gantry (shaped like a big donut) which
houses the x-ray tube and a set of detectors. Images are
acquired by detectors that pick-up the x-ray passing
through your body. The computer processes this
information to form a sequential image that the
radiologist will review and interpret.
Some CT studies require a contrast agent to enhance the
pictures taken of your body. You will receive special
instructions in advance from us if your exam requires you
to consume an oral contrast agent or if intravenous
contrast will be administered during the exam.
CT
with Oral Contrast
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You will pick up two containers of
liquid that will be supplied by our office. The containers may be
refrigerated until used. Shake the containers well before
drinking.
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You will drink the first container
at 9:00 pm the night before your exam appointment.
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The next day, you will drink
one-half of the other container 2 hours before your
scheduled appointment.
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1 hour before your
scheduled appointment, you will drink the other half of the
container.
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Your last meal before your exam
(4 HOURS PRIOR) must be
clear liquids only.
YOU MUST BE IN OUR OFFICE
YOUR
SCHEDULED EXAM TIME FOR ONE MORE DRINK.
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YOU MAY EXPERIENCE DIARRHEA FOR A DAY OR TWO
FOLLOWING THIS EXAM.
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YOU MAY RECEIVE AN INJECTION OF IV
CONTRAST (X-RAY DYE) DURING YOUR EXAM.
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If you are
diabetic, please see the note below for
DIABETIC PATIENTS
CT
with Intravenous Contrast
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You
may have a normal diet until midnight of the day before your test.
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On the day of the test, you should have
clear liquids;
no solid foods.
We encourage you to drink clear liquids prior to the test.
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You may have a normal diet until
4 hours prior to your appointment,
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then you should only have
clear liquids until the test is performed.
We encourage you to
drink clear liquids
prior to the test.
Diabetic patients:
For patients on
Metformin *
therapy and undergoing procedures involving intravenous
administration of contrast, the information, released by
the drug manufacturers state that they "should be
stopped at the time of, or prior to the procedure."
Then, they
should be withheld for 48 hours after the procedure. Once renal
function is found to be normal, medication therapy can be started
again.
Your referring physician will be
informed of these conditions prior to your study. You should then
refer to your physician's instructions for restarting this
medication therapy.
* Diabetic Patients on METFORMIN
therapy which includes brand names such as:
ACTOplus,
AVANDIMET, AVANDAMET, FORTAMET, GLUCOPHAGE,
GLUCOPHAGE XR, GLUCOVANCE, GLUMETZA, METAGLIP, RIOMET
General Prep Info
Each
type of imaging exam has its' own guidelines. Special
instructions for your exam will be given at the time of scheduling.
For certain procedures, we will contact you 24-48 hours prior to your
exam with preparation-specific instructions.
The following are a few general guidelines that apply to
every imaging exam:
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Notify your physician and our staff if there is any
chance that you
may be pregnant or are currently breastfeeding.
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Discuss any special needs - such as dietary and/or
physical
limitations with us in advance.
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Check with us in advance about recovery time or if
a driver is
needed so you can make necessary arrangements with work and family.
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Wear comfortable, metal-free clothing; be prepared
to change
into a patient gown if necessary.
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Arrive early to verify your
registration information
and provide further health information for your exam.
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Bring prior x-rays or scans with you to the exam
if you are
instructed to do so.
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