Value of 18F-FET PET in Patients With Suspected Tumefactive Demyelinating Disease—Preliminary Experience From a Retrospective Analysis

Purpose To investigate the diagnostic value of 18 F-fluoroethyl- L -tyrosine (FET) positron emission tomography (PET) in patients with suspected tumefactive demyelinating disease. Methods We retrospectively examined FET-PET and MR imaging of 21 patients (12 female, 9 male) with known demyelinating disease and newly diagnosed tumefactive lesions. The maximum standardized uptake value (SUV max ), time activity curves (TAC) and lesion-to-background...