What is the procedure?

Highly detailed cross sectional images of the body are obtained using a thinly collimated X-ray beam.

The day before the exam:

Have nothing to eat 2 hours before the exam. You are encouraged  to drink lots of fluid. Continue taking medication up until the exam. No preparation is necessary for studies which do not require IV contrast.

The day of the exam:

If there are CT scans or X-rays taken elsewhere that need to be compared, please bring them with you. CT scans of the abdomen and pelvis usually require oral contrast, which is a flavored drink that produces clearer pictures. Please allow 1 hour for the contrast to pass through the bowel. Some CT scans require intravenous contrast which is a nonionic iodinated solution that is injected in the arm.

Please inform our staff if you are pregnant or suspect that you may be pregnant, if you have had a previous reaction to X-ray contrast or if you have any of the following:

  • Severe allergies or asthma
  • Severe incapacitation or heart disease
  • Multiple myeloma, sickle cell disease, polycythemia or pheochromocytoma
  • Kidney disease, particularly caused by diabetes.

During the exam:

During the test you lie on a table and hold your breath for approximately ten seconds. If intravenous contrast is required it will be given at this time.

After the exam:

If you are a diabetic taking Glucophage, Glucovance, Metaglip or Avandamet you will be required to discontinue use of this prescription for 48 hours after the exam. You should check with your doctor before discontinuing or restarting your medication.

Exam offered at following locations:

Mitchell A. Goldman, MD, Diagnostic Imaging Center
Long Island Jewish Medical Center
North Shore University Hospital
North Shore-LIJ Imaging at Glen Cove
North Shore-LIJ Imaging at Great Neck
North Shore-LIJ Imaging at Great South Bay 
Staten Island University Hospital
Forest Hills Hospital
Franklin Hospital
Huntington Hospital
Plainview Hospital
Southside Hospital


Last Update

December 21, 2012
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