FIGURE 4. Linear regression analysis of mean tumoral SUVs of 18F-FLT and 18F-FDG and proliferation fraction (percentage of Ki-67positive tumor cells). Mean 18F-FLT SUV: significant correlation for P < 0.0001, r = 0.92. Mean 18F-FDG SUV: significant correlation for P < 0.001, r = 0.59.