Fig. 4

An 83-year man with lung cancer. The images of a lung nodule in the middle of the right lung next to the sternum were shown for SVB0.6 (a), SVB0.8 (b), SVB0.9 (c), SVB1.0 (e), RVOSEM (f), SVOSEM (g), and CT (h). The nodule has a diameter of 0.56 cm measured on CT axial view. The line profiles of the lung nodule were plotted on panel d for each reconstruction group. A red line was placed in panel c to illustrate the location where the line profile was generated. The lesion contrast was improved, and the image noise was similar in SVB0.8 and SVB0.9 groups compared to RVOSEM. Two ¹⁸F-FDG-avid infraclavicular lymph nodes were identified on the same patient. The PET images were shown for SVB0.6 (i), SVB0.8 (j), SVB0.9 (k), and SVOSEM (o). The CT image reveals two round-shaped soft tissue intensity nodes in the panel p. However, the node pointed by a white arrow was less appreciable on the images of SVB1.0 (m) and RVOSEM (n). The fusion views of PET/CT for the lymph nodes were provided in Additional file 1: Fig. 3 for SVB reconstructions. The line profiles of the lymph nodes for each reconstruction group were shown in panel l. The location of the line profile is illustrated in (k) (red line)