... DNET (28 30 ), gangli-oglioma (29 ,30 ), oligodendroglioma and oligoastrocytoma (28,29), low-grade astrocytoma (28 ,30 33 ), high-grade astrocytoma (30 ,31 ,34 ),brainstem tumors (30 ,31 ,33 ,35 ), cerebellar ... and supra-tentorial PNET (30 ,32 ,33 ), ependymoma (30 ,31 ,33 ), germ cell tumors (30 ,31 ), choroids plexus papilloma (30 ), craniopharyngioma (30 ), andpituitary adenoma (30 ).Hoffman et al. (33 ) evaluated ... Several forms of 18F-labeled tyrosine have been synthesized, including L- 2-[ 18F]fluo-rotyrosine (FTyr), L- 3- [ 18F]fluoro-a-methyltyrosine (FMT), and 2-[ 18F]fluoroethyl-l-tyrosine (FET). Preclinical...