Why is this procedure done?
CT colonography takes pictures of the large bowel and rectum. It uses x-rays and computers or a CT scan. Your doctor may suggest this procedure to check for growths called polyps or cancers in your large bowel. This test will provide early detection and treatment for possible cancers. CT colonography is recommended for those: � �
- Ages 50 years and up
- With family history of colon cancer
- Who cannot undergo a regular colonoscopy
A CT scanner is a tunnel-like machine. There is a hole in the middle of the machine where you can lie down. The scanner will take pictures while you are lying inside. � �
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What will the results be?
A doctor with special training in reading x-rays will look at the CT pictures. The doctor will be looking to see if there is a problem that needs treatment. Your doctor will get the findings and will talk to you about them. � �
What happens before the procedure?
- Your doctor will talk with you about your history and do an exam. Talk to your doctor about:
- If you are pregnant or nursing
- All the drugs you are taking. Be sure to include all prescription and over-the-counter (OTC) drugs, and herbal supplements. Tell the doctor about any drug allergy. Bring a list of drugs you take with you.
- If you have a history of heart, liver, or kidney disease
- If you weigh more than 300 pounds. The machine has a weight limit.
- When you need to stop eating before your test.
- You may be given a dye called "contrast " � for this procedure. Tell your doctor if you are allergic to dye or shellfish.
- Your doctor may give you a drug to empty out your stomach and bowels before the procedure. This may cause a loss of body fluids. Talk to your doctor about how to prevent this.
- Your doctor may want you to drink only clear liquids the day before the procedure. Talk to your doctor about what is OK to drink.
- Tell your doctor if you have problems with small spaces. You may be given a drug to help you relax.
- You may be asked to take off anything metal. This would include jewelry, watch, hairpins, or hearing aids. You may also have to take out any removable dentures before the procedure.
What happens during the procedure?
- You will lie on the narrow table of the machine. This table will slowly move into the hole of the machine. It takes pictures from many angles. You will hear noises while the pictures are being taken.
- Air will be pumped into your rectum through a tube.
- You may be asked to hold your breath and stay very still for a few seconds while pictures are taken. You may also be asked to change positions for more pictures to be taken.
- The technician will guide you through the whole process from the next room. The machine has a speaker inside. This way, you and the technician can talk with each other.
- You may feel some discomfort in your belly because of air that was pumped into you earlier.
- The procedure takes 15 to 30 minutes.
What happens after the procedure?
- You may go home after the procedure.
- Ask your doctor when you can get the results.
What care is needed at home?
- You may go back to your normal activities after the procedure.
- If you were given a contrast dye, you should drink 6 to 8 glasses of water. Wash your hands after using the toilet.
- You may return to your regular diet after the test.
What follow-up care is needed?
If you have not heard the results of the CT scan within 1 week, call your doctor. The results will help your doctor understand what kind of problem you have. Together you can make a plan for more care. � �
What problems could happen?
- Feeling full in your belly
- Belly or stomach cramps
Where can I learn more?
American College of Radiology � �
http://www.radiologyinfo.org/en/info.cfm?pg=ct_colo � �
Consumer Information Use and Disclaimer
This information is not specific medical advice and does not replace information you receive from your health care provider. This is only a brief summary of general information. It does NOT include all information about conditions, illnesses, injuries, tests, procedures, treatments, therapies, discharge instructions or life-style choices that may apply to you. You must talk with your health care provider for complete information about your health and treatment options. This information should not be used to decide whether or not to accept your health care providers advice, instructions or recommendations. Only your health care provider has the knowledge and training to provide advice that is right for you. � �
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