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Table 1 NEMA spatial resolution of the dPET system

From: Performance evaluation of the next generation solid-state digital photon counting PET/CT system

Spatial resolution
  Measurements 01a Measurements 02
FWHM FWTM FWHM FWTM
Direction 1 cm 10 cm 20 cm 1 cm 10 cm 20 cm 1 cm 10 cm 20 cm 1 cm 10 cm 20 cm
Axial 3.96 4.83 NA 8.37 9.45 NA 4.14 4.72 5.81 8.51 9.30 11.76
Transverse (radial) 4.11 4.47 NA 8.38 8.72 NA 4.01 4.64 5.83 8.37 8.97 10.41
Transverse (tangential) 4.11 4.38 NA 8.38 8.94 NA 4.01 4.41 4.95 8.37 8.91 10.43
  1. Spatial resolution is measured in millimeters with radial offset at 1 cm, 10 cm, and 20 cm
  2. aMeasurement 01 contains all tests except for the radial offset at 20 cm; we repeated all test including the 20 cm offset results as shown in measurements 02