J Med Phys Close
 

Figure 11: The reconstructed images of hot spheres in cold background phantom for the first photopeak windows in three situations: (a) the image result of the primary counts, (b) the image corrected by triple-energy window method, and (c) the image corrected by dual-energy window method together with (d) the line profiles obtained from a given row through the image of spheres 1 and 4

Figure 11: The reconstructed images of hot spheres in cold background phantom for the  first photopeak windows in three situations: (a) the image result of the primary counts, (b) the image corrected by triple-energy window method, and (c) the image corrected by dual-energy window method together with (d) the line profiles obtained from a given row through the image of spheres 1 and 4