A bone scan is a diagnostic imaging test used to determine whether cancer has spread into the skeleton. A phosphate radiotracer is injected into the patient’s bloodstream and accumulates predominantly in the bones. A gamma camera can produce two-dimensional or three-dimensional images, which may reveal bony fractures, infection, inflammation and the spread of cancer, or bone metastasis.
An 82-y-old patient with numerous bone metastases. From left to right: posterior and anterior planar BS, multi-FOV SPECT, and 18F-Fluoride PET images. More lesions are detected on SPECT compared with planar images and on 18F-Fluoride PET compared with SPECT images.