SSTR2 and meningioma: PET-tracers based either on amino acids as [11C]-Methionine (MET) and [2-18F]-fluoro-L-tyrosine (TYR) or the somatostatin receptor 2 (SSTR2) ligand [68Ga]-DOTA-D Phe 1-3Tyr3-Octreotide (DOTATOC) were shown to be beneficial for RT-planning, since these show very high meningioma to background ratios [13–21].