Scan - lung
Key points
- This is a type of nuclear scan involving radioactive gallium, which helps determine whether a patient has inflammation in the lungs.
- After about 6 hours for an acute (active) infection, or 24-hours for a chronic problem, the scan will take place.
- Several hours to 1 day before the scan, the injection of gallium will be administered to you at the hospital or doctor's office.
- This test is most often performed when there is evidence of inflammation in the lungs (sarcoidosis).
Alternative names
Gallium 67 lung scan; Lung scan; Gallium scan - lung; Lung gallium (Ga.) scan
Definition
This is a type of nuclear scan involving radioactive gallium, which helps determine whether a patient has inflammation in the lungs.
How the test is performed
Gallium is injected into a vein. After about 6 hours for an acute (active) infection, or 24-hours for a chronic problem, the scan will take place. You lie on a movable table that will be positioned under the scanner (gamma camera). The camera detects the gamma rays emitted by the gallium.
The information is then transmitted to a computer, which displays the image on the screen. The technician can move the scanner to get a clearer picture.
During the scan, it is important to remain still to get a clear image. The technician can assist in making you comfortable before the scan begins. The test will take about 30-60 minutes.
How to prepare for the test
You must sign an informed consent form. Several hours to 1 day before the scan, the injection of gallium will be administered to you at the hospital or doctor's office.
Just before the scan, remove jewelry, dentures, or other metal objects that can affect the scan. Replace the clothing on the upper half of your body with a hospital gown.
For infants and children:
The preparation you can provide for this test depends on your child's age and previous experiences. For specific information regarding how you can prepare your child, see the following topics:
- infant test or procedure preparation (birth to 1 year)
- toddler test or procedure preparation (1 to 3 years)
- preschooler test or procedure preparation (3 to 6 years)
- schoolage test or procedure preparation (6 to 12 years)
- adolescent test or procedure preparation (12 to 18 years)
How the test will feel
The injection of gallium will sting, and the puncture site may hurt when touched for several hours or days. The scan is painless; however, you must remain still. This may cause discomfort for some patients. The wait between the injection and scan can cause some patients to become agitated.
Why the test is performed
This test is most often performed when there is evidence of inflammation in the lungs (sarcoidosis).
Normal Values
Written and revised by
David Cohen, M.D.
Our doctors write and review articles for accuracy and keep them up to date.
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