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FIGURE 2. Time course of R(t) for each of 4 tracers. Population mean values of best-fit parameters were used to calculate R(t) for FDG (dotted line), RIHSA (dotted-dashed line), FmT (solid line), and FHPAA (dashed line). Error bars show mean value ± 1 SD of Re for FDG, RIHSA, and FHPAA; Re is constrained to equal 1 by model used for FmT data. Re was not significantly different from 1 for FDG and not significantly different from 0 for RIHSA. Inset replots equilibration of FHPAA (dashed line), with population mean of metabolite fraction (dotted line) from in vivo FmT studies. Note different time scale.
