Figure 6
From: Homotopic non-local regularized reconstruction from sparse positron emission tomography measurements
Another set of reconstructed tomograms from the PET3 data set using three different reconstruction methods (FBP: a-c, TVR: d-f, HNLR: g-i) at 20%, 35% and 50% sampling fractions. It can be observed that the proposed HNLR method can achieve strong reconstruction results even at relatively low 20% sparse sampling fraction, while the reconstruction results of FBP has very strong artifacts and the reconstruction results of TVR show noticeable loss in detail.