CT scan

We use advanced CT (computed tomography) scanners to complete imaging tests quickly, get more detailed pictures and reduce radiation exposure. At Atrium Health Floyd and Harbin Clinic, we prioritize prompt diagnoses that help us prevent and treat health problems as soon as possible.

What is a CT scan?

A CT scan, also called a CAT scan, is an imaging test. It uses rotating X-rays to create 3D images of your bones and soft tissues.

A CT scanner is a large machine with a hole in the middle, like a donut. During the test, you lie down on a table that slides slowly through the middle of the scanner. The scanner rotates around different areas of your body and takes multiple X-rays.

CT scan uses and benefits

CT scans can quickly create detailed pictures of many body parts. Given their speed, they’re often critical in emergencies to identify internal injuries from accidents and trauma.

CT scans are also used during diagnostic and treatment procedures to guide care. The scan shows internal organs when it’s used with contrast dye injection before imaging. Your provider can look at structures such as your brain, heart, blood vessels, kidneys, lungs and intestines in a matter of minutes.

What to expect with a CT scan

A CT scan can take anywhere from a few minutes to half an hour. During the scan, you have to stay as still as possible.

Before your CT scan, make sure to tell your provider if you:

• Are pregnant or could be pregnant
• Have had an allergic reaction to iodine or contrast dye in the past

You receive imaging results within a couple of days for nonurgent scans. Your provider will contact you with recommendations for follow-up care as needed.

CT scan with contrast

If your scan requires contrast dye, you’ll receive an intravenous (IV) injection before the scan. People older than 70 or who have diabetes will need to have a blood test two days before their scan. People with an iodine allergy will need to take certain medication 24 hours before their scan.

CT scan risks and side effects

CT scans use ionizing radiation to create images. Radiation exposure can increase your risk for cancer. Your risk depends on the amount of radiation exposure, the body part exposed, your age and your assigned sex at birth.

Contrast dye used with some CT scans may cause an allergic reaction. Contrast dye can also affect your kidney health if you have an existing kidney condition.

The scanner is not an enclosed machine, so you are unlikely to feel claustrophobic. The machine surrounds one area of your body at a time.