CT - CAT Scan

About your CT

Your doctor has requested you undergo a CT examination. The following information should help clarify what you can expect regarding the procedure.

WHAT IS A CT SCAN?

Also known as a "CAT scan," CT (Computed Tomography) combines multiple X-ray images to produce a two-dimensional cross-section view of anatomy with as much as 100 times more clarity than a conventional X-ray. CT imaging clearly shows soft tissue, like the brain, and dense tissue, like bone. The information gathered during a CT scan is processed by a computer and interpreted by a radiologist to diagnose or rule out disease. Some CT scans require a contrast medium, which can be given intravenously, orally, or both. The contrast agent will be able to highlight certain body parts to enable the radiologist to see any abnormalities. For example, CT scans of the abdomen and pelvis often require the patient to drink a barium-based liquid to outline the intestines for better viewing.

WHAT WILL THE EXAM BE LIKE?

You will be met by a CT technologist whose primary concern is your care and well-being. This technologist has completed a rigorous course of education and training and works under the close supervision of the radiologist to ensure the most accurate results from your examination. Before starting your CT exam, the technologist will explain the procedure to you and address any concerns you may have. Next, you will be gently positioned and secured on the scan table. It is important that you remain still because even the slightest movement during the exam can blur the picture and result in the need for repeated scans. You will hear humming as the equipment generates the images, and you will feel a slight movement of the table as it gently positions you for each scan. The technologist will have you in full view and constantly communicate with you through a two-way microphone.

HOW DO I PREPARE FOR THE EXAM?

HOW LONG DOES THE EXAM TAKE?

This exam usually takes 10-15 minutes. Actual exposure time is minimal, although the time can vary depending on the study requested and other factors.

If the prescribed CT is of the abdomen,

  • You may have a liquid diet 4 hours prior to the exam—NO SOLID FOOD.

  • Arrive 1 hour before the exam time for oral dosing.

If the prescribed CT is of the pelvis,

  • You may have a liquid diet 4 hours prior to the exam—NO SOLID FOOD.

  • Arrive 2 hours before the exam time for oral dosing.

If the prescribed CT is of the abdomen/pelvis,

  • You may have a liquid diet 4 hours prior to the exam—NO SOLID FOOD.

  • Arrive 2 hours before the exam time for oral dosing.

*NOTE: You may pick up the oral contrast at any of our offices prior to the exam and drink at home to avoid wait time.

For all other CT exams, there are no special instructions. Please inform the technologist or staff if you are pregnant or think you may be pregnant.

Radiology Associates' CT facilities are accredited by the American College of Radiology

Reports are also available on the Patient Portal