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. Author manuscript; available in PMC: 2013 Jan 1.
Published in final edited form as: J Nucl Med. 2012 Jan;53(1):4–11. doi: 10.2967/jnumed.111.093443

FIGURE 1.

FIGURE 1

Multiple definitions of ROIpeak. In this schematic PET image of radiotracer uptake in tumor (purple outline), ROIpeaks of different sizes and in different locations are shown. Shape of ROIpeak can vary too (only circles are shown).