Fig. 4

Sinogram images on 4-mm (a–e) and 2-mm (f–j) voxel size (urine shift pattern). μ-map sinogram (a, f), changing display scaling of a, f (b, g), mask for TF-SSS algorithm (c, h in blue), random-corrected emission (d, i), and mask superimposed on the emission sinogram (e, j). Both 4-mm and 2-mm voxel size μ-map sinograms masked the urinary catheters (yellow arrows)