Computer Assisted Tomography (CT) uses special x-ray equipment to obtain images of the body from different angles. The images are computer processed to create a cross-section image. CT is able to show several types of tissue with great clarity and provides the Radiologist with a 3-dimensional view of the scanned area. This perspective can be very helpful in diagnosing disease and planning appropriate treatments.

The CT scanner itself looks very much like a doughnut. Inside this doughnut, an x-ray source rotates, emitting a beam that is recorded by a detector located on the opposite side of the ring. These images are recorded and computer processed to reconstruct a two-dimensional image - much like looking at a single slice within a loaf of bread.

In order to provide a better image, special liquids, called contrasts, may be given orally and/or through an IV. These contrasts are used to enhance the viewing of blood vessels and the GI tract. IV contrast is processed through the kidneys and thus renal function must be considered. You may need to get a blood test to check for kidney function before your exam. The test is called a "serum creatinine" and your doctor should provide you with the order.

How to Schedule an Appointment

Preparation Information

• Spine/Bones- No Prep
• Head (No IV Contrast)- No Prep
• CT Angiogram- Clear liquids, no solid food for 4 hours prior
• Abdomen and/or Pelvis- Clear liquids, no solid foods 4 hours prior. Pick up two bottles of Readi-Cat (oral contrast) from the Imaging Department, drink 1 bottle 1-1/2 hours prior to exam, bring the second bottle with you and you will be instructed when to finish prep.
• Abdomen for Kidney (Nephros)- Clear liquids, no solid foods for 4 hours prior