Lung gallium scan is a type of nuclear scan involving radioactive gallium (Ga.). The test helps determine whether a patient has inflammation in the lungs.

Gallium is injected into a vein. The scan will be taken 6 to 24 hours after the gallium is injected. (Test time depends on whether your condition is acute or chronic ).

During the test, you lie on a table that moves underneath a scanner called a gamma camera. The camera detects the rays emitted by the gallium. Images display on a computer screen.

During the scan, it is important that you remain still to get a clear image. The technologist can help make you comfortable before the scan begins. The test will take about 30 - 60 minutes.

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.

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.