title: 1 + 1 = 3.
authors.forename: Thomas
authors.initials: T
authors.lastname: Beyer
authors.forename: Andreas
authors.initials: A
authors.lastname: Bockisch
authors.forename: Otmar
authors.initials: O
authors.lastname: Schober
mesh_terms: D001317:Austria; D005858:Germany; D006801:Humans; D007091:Image Processing, Computer-Assisted; D009683:Nuclear Medicine / Q000193:education / Q000592:standards*; D010506:Periodicals as Topic; D049268:Positron-Emission Tomography; D012955:Societies, Medical; D013557:Switzerland; D015899:Tomography, Emission-Computed, Single-Photon