J Med Phys Close
 

Figure 9: The reconstructed images of cold spheres in hot background phantom in four situations: (a) before correction, (b) corrected by triple-energy window method, and (c) corrected by dual-energy window method together with (d) the image obtained from the primary photons. The first and second rows are related to the first and second photopeak window, respectively

Figure 9: The reconstructed images of cold spheres in hot background phantom in four situations: (a) before correction, (b) corrected by triple-energy window method, and (c) corrected by dual-energy window method together with (d) the image obtained from the primary photons. The  first and second rows are related to the  first and second photopeak window, respectively