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. Author manuscript; available in PMC: 2013 Jul 7.
Published in final edited form as: Phys Med Biol. 2010 Apr 19;55(9):2761–2788. doi: 10.1088/0031-9155/55/9/022

Figure 11.

Figure 11

In-plane reconstructed spheres of various sizes and activity concentration ratios in warm background for signal to noise and contrast to noise ratio studies (DOI resolution = 3 mm). The panel separation is 4 cm. The sphere sizes were 1–8 mm in diameter. The activity concentration ratios studied were 10:1, 5:1 and 3:1. The time inside the bracket indicates the imaging time. Spheres larger than 5 mm even with the low activity concentration ratio of 3 to 1 can be clearly resolved in 2 min. When the simulation is stopped at 7 min, the 2 mm sphere with a concentration ratio of 10:1 can be visualized. The visualization for spheres less than 1 mm diameter requires more statistics and is under investigation.