An Indium-111 White Blood Cell (WBC) Scan is ordered when an infection is clinically suspected.

An Indium-111 WBC Scan involves the injection of radioactive white blood cells into the vein through a small needle, followed by a Gamma camera scan to confirm or exclude a clinically suspected infection.

Often, other tests including a bone scan and a sulfur-colloid bone marrow scan may be ordered for comparison with the Indium-111 WBC Scan. CT, MRI and/or ultrasound examinations may be suggested based on the results of the Indium-ill White Blood Cell Scan.