Preparing for a PET scan requires switching to a no-sugar diet the day before the scan. People with diabetes may have special instructions regarding medications. Doctors typically schedule PET scans ...

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How and Why a PET Scan Is Done and Possible Side Effects ... MSN: Foods to Eat and Foods to Avoid Before a PET Scan 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. A PET scan β€” or positron emission tomography scan β€” is an imaging tool that lets doctors see how well your tissues and organs are working. It’s often used to diagnose and stage various cancers.

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