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. 2018 Oct 25;45(12):5397–5410. doi: 10.1002/mp.13226

Figure 2.

Figure 2

Transaxial cross‐sections of images for Monte Carlo‐simulated SPECT data for phantom shown in Fig. 1, reconstructed by: (a) the ICTV‐PAPA method for 40 kc/view data, λ 1  = 0.4, λ 2  = 0.4; (b) the ICTV‐PAPA method for 80 kc/view data, λ 1  = 0.3, λ 2  = 0.3; (c) the ICTV‐PAPA method for 120 kc/view data, λ 1  = 0.2, λ 2  = 0.2; (d) the TV‐PAPA method for 120 kc/view data, λ = 0.2; and (e) the GPF‐MLEM method using 120 kc/view data, FWHM = 7.3 mm. For all images, reconstructions were stopped at 100 iterations. Left column: hot spheres with Gaussian activity distribution (see text). Right column: cold spheres with zero activity.