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PDQ Cancer Information Summaries [Internet]. Bethesda (MD): National Cancer Institute (US); 2002-.

Cover of PDQ Cancer Information Summaries

PDQ Cancer Information Summaries [Internet].

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Positron emission tomography (PET) scan; drawing shows a child lying on table that slides through the PET scanner.

Positron emission tomography (PET) scan. The child lies on a table that slides through the PET scanner. The head rest and white strap help the child lie still. A small amount of radioactive glucose (sugar) is injected into the child's vein, and a scanner makes a picture of where the glucose is being used in the body. Cancer cells show up brighter in the picture because they take up more glucose than normal cells do.

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