Fig. 5
From: Optimisation of the air fraction correction for lung PET/CT: addressing resolution mismatch
top row: Siemens “TOF” reconstruction; bottom row: GT constructed from HRCT of the phantom and known activity concentrations; a, d axial slice through the centre of the sphere in the right lung; b, e axial slice through centre of the sphere in the left lung; c, f coronal slice through the phantom showing both spheres. The VOIs positioned over the sphere inserts, combined into a single VOI, for kernel determination, are shown in green