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Figure 7. Demonstration of image quality degradation as a function of image statistics between respiration average and respiration-gated frames at the level of the lung. Simulated 22 mm (left lung) and 16 mm (right lung) lesions at different levels of the pulmonary field are included. Respiration average frame: (a) 30M total coincidences and (b) 20M total coincidences. Corresponding respiration-gated frame: (a) 10M, (b) 6M, (c) 4M and (d) 2M total coincidences.
