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How is a PET scan used to diagnose non-Hodgkin lymphoma?

The PET scan is an imaging device that doctors can use to detect the presence of non-Hodgkin lymphoma in the body and its level of concentration. PET is short for positron emission tomography, and the scan works by injecting radioactive glucose into the blood stream. The glucose is then collected in greater concentration within cancer cells than normal cells, showing doctors where masses of cancerous cells have gathered.

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