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. Author manuscript; available in PMC: 2007 Dec 14.
Published in final edited form as: Nucl Instrum Methods Phys Res A. 2007 Jan 21;570(3):543–555. doi: 10.1016/j.nima.2006.10.277

Fig. 17.

Fig. 17

Six line source images reconstructed with 2-D FBP (left) with a ramp filter having a cutoff at the Nyquist frequency and 2-D ML-EM (right) with 20 iterations. Attenuation, scatter, and random were not corrected in the both images. 18F-FDG was filled in 1.1 mm diameter hot rods of resolution phantom (a Lucite cylinder with a 4.4 cm diameter and 3.4 cm height). Center-to-center spacing of hot rods is 5 mm.