Patent ID: 8309053

Claim:
A radioactively labeled analog of a fatty acid that is taken up by mammalian tissue, comprising the formula: wherein: X═H, 18 F, 123 I, 131 I, 34m Cl, 75 Br, 76 Br, 77 Br, and alkyl and heteroalkyls thereof, Y═H, 18 F, 123 I, 131 I, 34m Cl, 75 Br, 76 Br, 77 Br, and alkyl and heteroalkyls thereof, provided that at least one of X and Y is a radioactive label; A=(CH 2 ) z , O or S; Z=1-4; m=1-10; n=8-14; p=0-6; R═CH 3 , aryl or heterocyclic; and wherein the cyclic or heterocyclic organic substituent —CH-A-CH— causes said analog to be metabolically trapped in said tissue.