Fig. 8. ( A ) [18F]fluorodeoxyglucose ([18F]FDG) uptake rate after unilateral ventilator-induced lung injury to the test lung of animals in the negative end-expiratory pressure (NEEP) group ( filled symbols ) and in the positive end-expiratory pressure (PEEP) group ( open symbols ). Horizontal dashes indicate means. * P < 0.05 test versus control lung, within group. † P < 0.05 test lung of the NEEP group versus test lung of the PEEP group. ( B ) [18F]FDG uptake rate normalized to tissue fraction ( i.e. , specific metabolic activity).