A PET scan involves injecting a small amount of radioactive tracer into the body. The tracer accumulates in areas with high metabolic activity, such as cancer cells, and emits positrons. These positrons are detected by the PET scanner, which produces images showing the functional activity of tissues and organs. PET scans are particularly useful for detecting cancer metastasis, evaluating the effectiveness of treatments, and distinguishing between benign and malignant lesions.
