18F-EF5

Definition / meaning of 18F-EF5

A substance that is being studied in positron emission tomography (PET) imaging to detect tumor hypoxia (a low level of oxygen in the tumor).This may help predict how the tumor will respond to treatment. It belongs to the family of drugs called radiopharmaceuticals. Also called fluorine F 18 EF5.

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Source(s):

The Web site of the National Cancer Institute (http://www.cancer.gov/)

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