Jump to content

Choose locationChoose Location
  • Sign in or Enroll
    • Open I want to choose my medical group or hospital
    • Clear my location
Change Location

We've expanded your view

You are now viewing all services in the Sutter Health network. You can change your location above to narrow your view to a medical group, hospital, city or zip.
Sutter Health
  • Video Visits
  • Find Doctors
  • Find Locations
  • Treatments & Services
  • Locations
  • Sign in or Enroll
    • Video Visits
    • Find Doctors
    • Find Locations
    • Treatments & Services
    • COVID-19 Resources
    • Pay a Bill
    • Symptom Checker
    • Get Care Today
    • Diseases & Conditions
    • Health & Wellness
    • Classes & Events
    • Research & Clinical Trials
    • For Patients
    • About Sutter Health
    • Giving
    • Volunteering
    • Careers
    • News
    • For Medical Professionals
    • Other Business Services
Close Search
  • Home
  • Services
  • Pulmonary Care
  • Thoracic CT
Content

Chest CT

A chest CT (computed tomography) scan is an imaging method that uses x-rays to create cross-sectional pictures of the chest and upper abdomen.

Alternative Names

Thoracic CT; CT scan - lungs; CT scan - chest

How the Test is Performed

The test is done in the following way:

  • You'll likely be asked to change into a hospital gown.
  • You lie on a narrow table that slides into the center of the scanner. Once you are inside the scanner, the machine's x-ray beam rotates around you.
  • You must be still during the exam, because movement causes blurred images. You may be told to hold your breath for short period of time.

The complete scan takes 30 seconds to a few minutes.

Certain CT scans require a special dye, called contrast, to be delivered into the body before the test starts. Contrast highlights specific areas inside the body and creates a clearer image. If your doctor requests a CT scan with intravenous contrast, you will be given it through a vein (IV) in your arm or hand. A blood test to measure your kidney function may be done before the test. This test is to make sure your kidneys are healthy enough to filter the contrast.

You may be given medicine to help you relax during the test. 

Open Article Detail

How to Prepare for the Test

Some people have allergies to IV contrast and may need to take medicine before their test to safely receive this substance.

Contrast can be given in several ways, depending on the type of CT being performed.

  • It may be delivered through a vein (IV) in your hand or forearm.
  • It may be given through the rectum using an enema.
  • You might drink the contrast before your scan. When you actually drink the contrast depends on the type of exam being done. The contrast liquid may taste chalky, although some are flavored to make them taste a little better. The contrast eventually passes out of your body through your stool.

If contrast is used, you may also be asked not to eat or drink anything for 4 to 6 hours before the test.

If you weigh more than 300 pounds (135 kilograms), have your health care provider contact the scanner operator before the exam. CT scanners have a weight limit. Too much weight can damage the scanner's working parts.

Because it is hard for x-rays to pass through metal, you will be asked to remove jewelry.

How the Test will Feel

Some people may have discomfort from lying on the hard table.

Contrast given through an IV may cause a slight burning sensation, a metallic taste in the mouth, and a warm flushing of the body. These sensations are normal and usually go away within a few seconds.

There is no recovery time, unless you were given medicine to relax. After a CT scan, you can go back to your normal diet, activity, and medicines.

Why the Test is Performed

CT quickly creates detailed pictures of the body. The test may be used to get a better view of the structures inside the chest. A CT scan is one of the best ways of looking at soft tissues such as the heart and lungs.

A chest CT may be done:

  • After a chest injury
  • When a tumor or mass (clump of cells) is suspected, including a solitary pulmonary nodule seen on a chest x-ray
  • To determine the size, shape, and position of organs in the chest and upper abdomen
  • To look for bleeding or fluid collections in the lungs or other areas
  • To look for infection or inflammation in the chest
  • To look for blood clots in the lungs
  • To look for scarring in the lungs

What Abnormal Results Mean

Thoracic CT may show many disorders of the heart, lungs, or chest area, including:

  •  A tear in the wall, an abnormal widening or ballooning, or narrowing of the major artery carrying blood out of the heart (aorta)
  • Other abnormal changes of the major blood vessels in the lungs or chest
  • Buildup of blood or fluid around the heart 
  • Lung cancer or cancer that has spread to the lungs from elsewhere in the body
  • Collection of fluid around the lungs (pleural effusion)
  • Damage to, and widening of the large airways of the lungs (bronchiectasis)
  • Enlarged lymph nodes 
  • Lung disorders in which the lung tissues become inflamed and then damaged.
  • Pneumonia
  • Esophageal cancer
  • Lymphoma in the chest
  • Tumors, nodules, or cysts in the chest

Risks

CT scans and other x-rays are strictly monitored and controlled to make sure they use the least amount of radiation. CT scans use low levels of ionizing radiation, which has the potential to cause cancer and other defects. However, the risk from any one scan is small. The risk increases as many more studies are done.

In some cases, a CT scan may still be done if the benefits greatly outweigh the risks. For example, it can be more risky to not have the exam if your doctor thinks you might have cancer.

The most common type of contrast given into a vein contains iodine. If a person with an iodine allergy is given this type of contrast, nausea, sneezing, vomiting, itching, or hives may occur. In rare cases, the dye can cause a life-threatening allergic response called anaphylaxis. If you have any trouble breathing during the test, you should notify the scanner operator immediately. Scanners come with an intercom and speakers, so the operator can hear you at all times.

In people with kidney problems, the dye may have harmful effects on the kidneys. In these situations, special steps may be taken to make the contrast dye safer to use.

Considerations

References

Gotway MB, Panse PM, Gruden JF, Elicker BM. Thoracic radiology. In: Broaddus VC, Mason RJ, Ernst JD, et al, eds. Murray and Nadel's Textbook of Respiratory Medicine. 6th ed. Philadelphia, PA: Elsevier Saunders; 2016:chap 18.

Shaw AS, Prokop M. Computed tomography. In: Adam A, Dixon AK, Gillard JH, Schaefer-Prokop CM, eds. Grainger & Allison's Diagnostic Radiology: A Textbook of Medical Imaging. 6th ed. Philadelphia, PA: Elsevier Churchill Livingstone; 2015:chap 4.

Related Articles

From Sutter Health

    Talking To Your MD

      Self Care

        Other Related Content

          Patient Information

          Couple in kitchen looking at digital tablet

          Interested in becoming a Sutter patient? Here’s what you need to know about health plans, choosing a doctor and how to get started today.

          • Accepted Health Plans
          • Tips for Choosing a Doctor
          • Health Insurance Guide

          Find a Doctor Who Fits Your Needs

          The Sutter Health Network of Care
          Expertise to fit your needs
          Primary Care

          Check-ups, screenings and sick visits for adults and children.

          Specialty Care

          Expertise and advanced technologies in all areas of medicine.

          Emergency Care

          For serious accidents, injuries and conditions that require immediate medical care.

          Urgent Care

          After-hours, weekend and holiday services.

          Walk-In Care

          Convenient walk-in care clinics for your non-urgent health needs.

          About Sutter

        • About Our Network
        • Annual Report
        • Awards
        • Community Benefit
        • Contact Us
        • News
        • Giving
        • Find Care

        • Birth Centers
        • Care Centers
        • Emergency Rooms
        • Hospitals
        • Imaging
        • Labs
        • Surgery Centers
        • Urgent Care
        • Walk-In Care
        • View All >
        • Featured Services

        • Behavioral Health
        • Cancer Services
        • Family Medicine
        • Home Health and Hospice
        • Orthopedics
        • Pediatrics
        • Pregnancy
        • Primary Care
        • Women's Health
        • View All >
        • Patient Resources

        • Accepted Health Plans
        • Classes and Events
        • Estimate Costs
        • Flu Resources
        • Health and Wellness
        • Medical Records
        • Medicare
        • My Health Online
        • Pay a Bill
        • Symptom Checker
        • Our Team

        • For Employees
        • Physician Careers
        • Recruiting Events
        • Sutter Careers
        • Vendors
        • Volunteers
          • ADA Accessibility
          • Contact
          • Privacy
          • Do Not Sell My Personal Information

          • LinkedIn Opens new window
          • YouTube Opens new window
          • Facebook Opens new window
          • Twitter Opens new window
          • Glassdoor Opens new window
          • Instagram Opens new window

          Copyright © 2021 Sutter Health. All rights reserved. Sutter Health is a registered trademark of Sutter Health ®, Reg. U.S. Patent & Trademark office.

          Cookie Policy

          We use cookies to give you the best possible user experience. By clicking on "Accept Cookies", closing this pop-up banner or by continuing to use the site, you agree to the use of cookies. Privacy Policy   Cookie Preferences