CT-Computerized Tomography (CT)

Common CT Scan Questions

How is the procedure performed?
You will lie on a table connected to the CT scanner. The part of your body being scanned will be positioned in the middle of the large, doughnut-shaped scanner. A CT scan is completely painless. The machine will not touch you and you will not feel the x-rays.

During the procedure, the technologist will watch you through an observation window. A two-way intercom may be used for communication.

Some CT scans require the use of a contrast dye to differentiate normal from abnormal tissue or to highlight certain body tissues and structures. It may be given either through the mouth, usually for abdominal or pelvic scans, or through an injection in the vein (intravenously) during or in between scans of the head, neck, chest, abdomen, or pelvis. If dye is needed, you will receive it shortly before the exam. If you will be receiving a contrast intravenously, you will be asked to read and sign a consent form.

Is the exam safe?
Millions of CT exams are done every year in the United States. The x-rays use only a small dose of radiation.

Please let the technologist know if you have had reactions to contrast agents in the past. Oral and/or intravenous dyes may be used, depending on the type of exam. These contrast agents are generally safe, but as with all medications, side effects can occur. A small percent of patients are allergic to the intravenous agent. Allergies to the oral contrast are extremely rare. Allergic reactions are usually mild (itching, flushing) but occasionally may be severe. If you have had allergic reactions to dyes or contrast agents before, or if you have multiple allergies, you may be at higher risk for a reaction. Let your doctor know if you have any of these conditions when scheduling your exam. As with any medical procedure, please let the technologist know if you are or may be pregnant.

What preparation is needed?
Follow the directions given to you when scheduling this CT exam. Depending on the type of CT study, you may be asked to refrain from eating or drinking for a few hours before the exam. In some cases, a bowel cleansing preparation may be required. If you are asked to drink oral contrast, you will need to arrive about 60 to 90 minutes before your exam to drink the contrast.

What should I wear?
Wear comfortable, loose-fitting clothing. You may be asked to change into a patient gown or scrubs.

How long will the CT scan take?
Please arrive 15 minutes prior to your exam time to verify registration information and prepare for the exam. Allow approximately 30 minutes for the exam.

What can I expect after the exam?
You should be able to return to your normal activities immediately following the exam.

When will my physician get the results?
One of our radiologists will study the images and send a written report to your physician within one to two business days.