Figure 3

Correlation between the metabolic rate K _m and Standard Uptake Value and retention index, respectively. (A) K _m and $c_t^{+}$ (in SUV units) and (B) K _m and retention index (in percent). $c_t^{+}$ is the tissue uptake at t = 55 min. Dashed lines represent the least squares straight line fits to the data. The inset graph in (A) additionally provides the correlation between $c_a^0$ and $c_t^{+}$, which helps to explain the group of data points above the regression line with SUV > 8 (see the ‘Discussion’ section).