CT (Computed Tomography)
Also known as a “cat scan,” a CT exam is an x-ray based test. The scanner rotates around your body, taking multiple x-rays that are combined into cross-sectional and three dimensional images. It is a safe and proven technology.
CT is used to identify abnormalities within the body. It is especially used for helping your doctor assess the soft tissues, such as the heart and lungs, as well as other organs within your body.
Some CT examinations require an injection of contrast material to better visualize your anatomy. The intravenous contrast used by most imaging centers and hospitals is iodine-based, and negative reactions are extremely rare. In addition, an alternative contrast agent is offered for patients who are allergic to iodine.
For examinations of the digestive system, an oral contrast agent called barium may be required. This is to be taken by the patient an hour before their examination. If you are having a CT examination of the small or large intestine, you will be issued special preparation instructions prior to your CT.
While there is radiation exposure with a CT examination, the amount the patient receives during is very low and will not be a health risk for you.
Preparation Instructions
If you are having a CT examination without a contrast medium, no special preparation is needed. Please bring all relevant previous radiology reports to your exam.
On the day of your exam, you will be asked to remove jewelry and certain clothing items in order to obtain the highest quality images.
If an oral contrast is needed, please arrive at least one hour before your appointment and do not consumer food or beverages for four hours prior to your exam. To flush the contrast medium from your body after the exam, drink plenty of fluids.
Please continue to take your medications as prescribed. If you are pregnant or believe you may be pregnant, please inform your doctor and our staff prior to your exam.
What to Expect
The CT scanner is a large, round machine that looks like a big donut. You will be placed on a moving table that slides inside the machine. A special X-ray camera revolves around your body that takes images at many different angles.
Depending on the type of scan you are receiving, it will take anywhere from a few minutes to up to 45 minutes.
The technologist will communicate with you via a two-way intercom while you are inside the machine. They will issue instructions during the scanning process, and you may be required to hold your breath for short periods of time. If you require a contrast medium, an intravenous injection will be made by the technologist.
