What is CT Scanning?
CT Scanning uses a specialized X-ray to produce detailed pictures of the body. Physicians schedule CT scans to better understand the effects of trauma and disease.

CT scanning is usually an easy procedure. Patients lie on a table that moves in and out of an opening in the CT scanner. Abdominal CT patients may have to hold their breath for a few seconds. Patients who have CT scans of the head may be asked to remain very still for a few minutes.
 
Because metal zippers, snaps and buttons interfere with CT, patients must remove these items before the scan. Patients may wear a sweatsuit without any metal parts to avoid wearing a hospital gown.

How do patients prepare for the exam?
Patients who have CT scans of the abdomen or pelvis are required to drink four to six cups of oral contrast before the CT exam. The oral contrast is a mixture of fruit juice and an iodine-containing liquid. Oral contrast helps the radiologist see the stomach and intestines and distinguish these organs from any abnormalities that may be present. Patients are required to prepare for the exam by fasting (no food or drink) for a period of four hours prior to the CT scan.

When do patients drink the oral contrast?
Patients in the CT waiting area are instructed to begin drinking the oral contrast 90 minutes before the CT appointment. Patients should try to drink the oral contrast during a 30-minute period.

What is IV contrast?
IV contrast (sometimes called X-ray dye) is a clear fluid that contains iodine. IV contrast is injected into the veins to highlight the tissues of the body or brain. Most, but not all, patients who have CT scans have IV contrast injected into a vein during their CT examination. If patients are allergic to IV contrast or iodine, they should inform the doctor as soon as possible. Patients who are more than 70 years old, have kidney problems, or have had chemotherapy need to have a simple blood test before IV contrast can be administered. Those who meet the former criteria should inform their physician and the CT technician.

Lab results obtained from other physicians' offices are accepted within 30 days of the patient's CT appointment. Blood tests drawn and analyzed in another location must include an evaluation of kidney function.
 
What about pregnancy?
As with any X-ray procedure, pregnant patients (or those who think they might be pregnant) should consult a physician to determine if the CT scan can be postponed. Pregnant patients who must have a CT exam should inform the technologist so that steps can be taken to protect the unborn child.

What about daily medications?
Patients should always take prescription medicine on schedule before and after CT scans. Medications requiring food should be discussed with a physician and the CT technician.

When are results available?
Physicians provide exam results. The radiologist interprets the CT scans the day they are performed. Some cases may require comparison to other exams, resulting in a slight delay. CMC provides results directly to physicians as soon as the radiologist verifies the report accuracy.