FIGURE 3. Number of prompt events (true events + random events + scatter) and random events recorded during phantom and human studies. All data are from phantom experiments except 6 separately indicated data points with error bars, which represent mean ± SD of prompt and random events from human studies. Solid lines indicate results from high-background phantom experiments, and dashed lines indicate results from low-background phantom experiments. Top group of curves is from data collection in 3D mode, and bottom group of curves is from data collection in 2D mode.
