FIGURE 5.

Average uptake and variability at a fixed number of iterations with corresponding image noise (5 iterations with TOF, 6 iterations with non-TOF reconstruction). (A) Sphere uptake (${\overline{NUV}}_j$) in the lung and liver, averaged over all spheres in all subjects. (B) Variabilities of NUV measurement over replicates (${\overline{COV}}_{repl,j}$), sphere locations (${\overline{COV}}_{loc,j}$), and subjects (COV_{subj, j}) for spheres inserted in the lung and liver.