CT scans, also known as CAT scans or computerized tomography, are painless diagnostic tests that use specialized X-ray equipment and powerful computers to create cross-sectional images of the inside of the body or the head. CT scans provide more detail than conventional X-rays and can produce images of bone, soft tissue and blood vessels all at the same time.
How to prepare for your CT scan
Before your CT scan
Please bring a list of the medications you take with you. If instructed, stop eating four hours before your CT. Clear liquids are acceptable. Your physician may request you drink oral contrast for your abdominal/pelvic CT scan. The contrast needs to be started 90 minutes prior to your appointment and can be picked up ahead of time at The Christ Hospital or The Christ Hospital Imaging Center. The test takes 20-30 minutes.
During your CT scan
You may be given a contrast injection through an intravenous (IV) line. You will lie on a table, which will slide into the CT scanner. The technologist may ask you to hold your breath for a few seconds during your scan.
After your CT scan
The radiation you are exposed to during a CT scan may be higher than from a regular X-ray. However, techniques to keep the radiation dose as low as possible are utilized. The radiation passes through you immediately, and you are not “radioactive” following a CT procedure.
If you take Glucophage (Metformin), you will be instructed not to take it for 48 hours. Instructions will also be faxed to your physician for blood work that you will need. If you have an IV injection, the contrast will be eliminated in your urine. It is recommended that you drink plenty of water to flush the contrast from your system. The contrast is colorless. If you drink oral contrast (a berry smoothie), it will be evacuated in your stool. Most patients do not experience any changes in bowel movement. However, some patients may experience diarrhea and abdominal cramping.
After your CT has been interpreted by our radiologist, the ordering physician will receive a report of the findings. Your physician will then advise you of the results and discuss what further procedures, if any, are needed.