[18F]FET PET images were acquired on an ECAT EXACT HR + PET scanner (Siemens Healthineers) with the standard protocol [8 (link), 17 (link)] at the Department of Nuclear Medicine of the LMU Munich. Dynamic [18F]FET PET images were acquired over 40 as detailed in [14 (link)]. If relevant motion was observed in dynamic PET images, a frame-wise correction was performed using PMOD fusion tool (version 3.5; PMOD Technologies, Zurich, Switzerland) after frame-wise checking for motion.
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