carbon C 11-choline
(KAR-bun ... KOH-leen)
A radioactive substance being studied in positron emission tomography (PET) imaging to find certain types of cancer. Carbon C 11-choline gets taken up by cells in the body and more of it is taken up by cancer cells than by normal cells. A PET scanner is used to find which cells in the body have taken up carbon C 11-choline. Also called 11C-choline.