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What is a PET scan?

How and Why a PET Scan Is Done and Possible Side Effects ...
Add Yahoo as a preferred source to see more of our stories on Google. Full-body MRIs promise to help detect cancer and other issues early. But they can also be expensive and unneeded medical tests.
A positron emission tomography (PET) scan is a diagnostic tool that examines body tissue functioning, such as blood flow, oxygen use, and sugar metabolism, to help doctors diagnose and treat disease.