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. Author manuscript; available in PMC: 2015 Feb 1.
Published in final edited form as: Phys Med. 2013 May 14;30(1):10.1016/j.ejmp.2013.04.001. doi: 10.1016/j.ejmp.2013.04.001

Figure 1.

Figure 1

Counting rates versus activity for the Biograph (a) and Discovery-ST (b) scanners for total line source activities in the range 10–600 kBq. The energy window was 375–650 keV. Plots are on a logarithmic scale to aid in visualization of the entire dynamic range. Background (intrinsic) true and random coincidence rates (phantom present, but no activity) also are shown.