Sayaka Blickenderfer is a medical and science editor and writer with more than 10 years of experience. She edits and prepares scientific manuscripts and grant proposals for submission. Jane Kim, MD, ...
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 uses radioactive sugar as a tracer, so you’ll need to switch to a low carb, no-sugar diet 24 hours before the scan. This means avoiding bread, pasta, cereal, milk, and starchy vegetables, ...