The amino acid 18F-FET was produced via aminopolyether-activated nucleophilic 18F-fluorination and applied as described previously [19]. Dynamic PET data were acquired in list mode for 40 min after intravenous injection of approx. 200 MBq 18F-FET. The measurements were performed on an ECAT Exact HR+ scanner in 3D mode (Siemens Medical Systems, Knoxville, TN, USA: 32 rings, axial field of view 15.5 cm, image resolution 5.5 mm) which is routinely used for 18F-FET PET in both centres. For attenuation correction, transmission scans with three 68Ge/68Ga rotating line sources were measured. Raw PET data were corrected for random and scattered coincidences as well as dead time.
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