Fig. 5

Maximum-intensity projection images for spheres in empty (top) and water-filled (bottom) torsos reconstructed using 40 iterations of MCR (left and middle) and NM 530c reconstruction (right). The activity concentrations were 3.8 and 4.1 MBq/mL at the start of the measurement for the spheres in the empty and water-filled torsos, respectively. The sphere volumes were 16, 8, 4, 2, 1, and 0.5 mL, moving clockwise from the lower-right sphere in each image. MCR images are shown with and without Butterworth post-filtration