Fig. 6From: Evaluation of the PETsys TOFPET2 ASIC in multi-channel coincidence experimentsImpact of the trigger threshold on CRT and energy resolution. Measurements were conducted with two Hamamatsu S14161-3050-HS-08 each coupled to an 8 × 8 12-mm-high LYSO scintillator array featuring 360 µm BaSO4 powder mixed with epoxy as segmentation layer. Single scintillator needles had a size of 3 mm × 3 mm × 12 mm. A geometry of five NEMA cubes (22Na sources) with a total activity of approximately 3 MBq is employed. a Coincidence resolution time (CRT - FWHM). b Coincidence resolution time (CRT - FWTM). c Gaussian excess factor (gaussex). d Energy resolution (dE/E)Back to article page