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Figure 3: Optimal PEEP at 12 cmH2O. PEEP of 12 cmH2O showing an overall improvement in ventilation distribution, with a shift to toward the dorsal regions (ROI 3 + ROI 4 = 30%). PEEP: Positive end-expiratory pressure

Figure 3: Optimal PEEP at 12 cmH<sub>2</sub>O. PEEP of 12 cmH<sub>2</sub>O showing an overall improvement in ventilation distribution, with a shift to toward the dorsal regions (ROI 3 + ROI 4 = 30%). PEEP: Positive end-expiratory pressure