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Evaluating Your Sinuses: Diagnostic Tests 

Imaging tests can help your healthcare provider learn more about your sinuses. You may have one or more tests to confirm your diagnosis.

Diagnostic tests

  • CT scan. This is a special kind of X-ray. It gives a detailed view of your nose and sinuses. Scans from different angles help show the exact place where the blockages are. They also serve as “maps” during surgery. In some cases, you may need more than one CT scan before your surgery.

  • Nasal endoscopy. This is a procedure that uses a slim, flexible tube with a fiberoptic light at the end. This is called an endoscope. The healthcare provider puts the endoscope into your nose. This lets your healthcare provider see the inside of your nose. He or she can also see your mucosa and the openings of your sinuses. If needed, your healthcare provider can also take samples (biopsies) through the endoscope. These samples will be looked at by a lab.

  • Allergy tests. You may have these types of tests to find out what things you are allergic to. You may be allergic to food, latex, pollen, mold, pet dander, or other environmental substances.

  • Mucus sample (culture). The healthcare provider may take these samples from your nose to check for infection.

CT scan of deviated septum and blocked sinus (front view). CT scan of blocked sinus (cross section from above).

Online Medical Reviewer: Ashutosh Kacker MD
Online Medical Reviewer: Daphne Pierce-Smith RN MSN CCRC
Online Medical Reviewer: Marianne Fraser MSN RN
Date Last Reviewed: 12/1/2019
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