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NCI Dictionary of Cancer Terms


18F-choline  listen  (... KOH-leen)

  A radioactive substance being studied in PET imaging to detect certain types of cancer. 18F-choline gets taken up by cells in the body and more of it is taken up by tumor cells than by normal cells. A PET scanner is used to detect which cells in the body have taken up 18F-choline. It is a type of radioimaging agent. Also called 18F-fluoromethylcholine, 18F-FMCH, and fluorine F 18 fluoromethylcholine.