An Interindividual Comparison of O-(2- [18F]Fluoroethyl)-L-Tyrosine (FET)- and L-[Methyl-11C]Methionine (MET)-PET in Patients With Brain Gliomas and Metastases

O-(2- [18F]fluoroethyl)-L-tyrosine-PET and MET-PET provide comparable diagnostic information on gliomas and brain metastases. Like MET-PET, FET-PET can be used for differentiation of residual or recurrent tumor from treatment-related changes/pseudoprogression, as well as for delineation of gliomas.