Computed Tomography (CT) Scan

A computed tomography (CT scan), also known as a CAT scan, is a medical imaging technique that uses X-rays and advanced computer technology to create multiple detailed images of an area inside the body. These images are combined to show cross-sectional views, or slices, of organs, bones, soft tissue and blood vessels with great clarity.

CT scans can help:

• Diagnose diseases such as cardiovascular conditions, muscle and bone disorders, infections, and abdominal problems such as kidney stones
• Identify neurological problems such as strokes
• Detect internal injuries and bleeding from trauma
• Support cancer diagnosis, staging and treatment monitoring
• Inform preoperative planning, such as tumor removal or organ transplants

A CT scan is a painless imaging procedure. Before the scan begins, the imaging technologist will review your medical history, ask about allergies and answer any questions you may have. Since a CT scan involves the use of X-rays, it’s important to let them know if you think you might be pregnant.

During the scan, you will lie on a padded table that moves through a large, donut-shaped scanner. The scanner takes images of structures on the inside of your body from several different angles. It’s important to lie still to ensure clear images.

Throughout the scan, the imaging technologist will be just outside the exam room and will communicate with you through an intercom. The technologist may ask you to hold your breath briefly while the machine takes pictures. Depending on the area being scanned, the technologist may also inject a contrast agent, a special dye, into one of your veins to enhance the image.

The scan itself only takes 5 to 15 minutes to complete; however, please allow 30-45 minutes for your appointment.

• Bring medication list and complete lab work for contrast studies. If your procedure includes contrast, please bring a list of medications you are currently taking and complete necessary lab work no more than eight weeks before your scan.
• Follow instructions for oral contrast. If your procedure includes contrast, you may need to take an oral contrast solution prior to your CT scan. If your doctor or other health care provider does not provide this solution for you, you can arrange to have it mailed to you (if your exam is scheduled out further than a week) or pick it up at a MultiCare outpatient pharmacy of your choice. You may also be able to arrive early to your appointment and have the oral contrast administered before your exam. We will discuss these options with you when you schedule your appointment.
• Bring previous imaging studies. If you have completed imaging studies (such as X-rays) related to your current problem at other facilities, please bring them with you.
• Wear loose, comfortable clothing. You may be asked to change into a gown before your exam to avoid possible interference from any metal in your clothing.
• Arrange child care and arrive early. For the safety of you and your children, please do not bring them to your appointment. If you are unable to arrange child care, please reschedule your appointment. Arrive 10-15 minutes early to fill out paperwork.

A radiologist, a physician who specializes in interpreting medical imaging, will analyze the results and send a report to your health care provider. You can also view your results in MyChart once they are available.

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