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FIGURE 2. Comparison of phantom and patient counting rates. (Top) Prompt rate vs. singles rate for 70-cm-long line source in 20-cm-diameter polyethylene cylinder (solid line) and for whole-body patient studies (
) taken on ADAC UGM C-PET scanner. (Bottom) Prompt rate vs. singles rate for 20-cm-diameter x 19-cm-long water-filled cylinder (solid line) and for brain patient studies () taken on University of Pennsylvania G-PET scanner. Singles rate is proportional to (unknown) activity in patients.
