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Frequently Asked Questions About Your CT (Computed
Tomography)
Does a CT scan hurt?
No, CT imaging itself is painless, although some scans
require that patients receive an IV injection prior to or during the
exam.
Do I have to hold still
during the whole exam?
You will need to hold as still as possible; patient motion can compromise image
quality. We may ask you to hold your breath at certain times to reduce breathing motion.
Will I fit comfortably in
the scanner?
Most people fit comfortably inside the scanner. However, for some exams we may need you to place your arms above your head. Some people who have trouble doing this may experience some discomfort, but it is usually for only a minute or two.
Will I be able to keep my
head outside of the CT machine?
Yes, you’ll be able to keep your head outside of the scanner, unless we are scanning your head or neck. However, most people do not have a problem with this since the scanner is very shallow
-- like a big donut.
Is it okay to have a CT during pregnancy?
It is important to notify your physician or the technologist
before the scan if it is possible that you might be pregnant. The
physician will determine whether another test, such as an ultrasound,
should be performed instead.
Do I need a referral (prescription) to receive a CT
scan?
Yes. Your physician must give you a referral in order to
undergo a CT scan.
Do I need a contrast injection before my CT exam?
IV contrast
is only used when the radiologist determines that it is necessary.
Iodine contrast enhances images of specific
organs, blood vessels, and tissues to better show the presence of
injury or disease. Please inform the
technologist if you are, or think you might be, allergic to iodine or IV
contrast.
Why are both oral and IV contrast used in CT?
Oral contrast is a very dilute barium solution that patients
drink 60-90 minutes prior to their scans. It enhances images of the
stomach and intestines. IV contrast enhances scans of the blood
vessels and organs. One or both forms of contrast may be used,
depending on the nature of the scan.
Will I have to change my clothes?
Patients may be asked to wear a gown for some scans.
In addition, removal of glasses, jewelry, dentures, hearing aids, or
anything else that could interfere with the scan may be required.
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