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. 2013 Jan 5;3(1):32–43.

Figure 5.

Figure 5

Tumor Heterogeneity, as observed with 18F-FDG and 64Cu-liposome PET tracers, for cohorts imaged 13 and21 days after tumor implantation. Heterogeneity was defined as sum of absolute value in %ID/cc of (pixel - ROImean)/ ROImean (Equation 2) with error bars representing SEM. N = 16 tumors for the cohort of mice imaged 13 days afterimplantation, n = 8 tumors for the cohort of mice imaged 21 days after implantation. Heterogeneity of imagesobtained with 64Cu-liposomes is less than that obtained with 18F-FDG at 6 hours in the cohort imaged 13 days afterimplantation, but is greater in all other groups.