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Experimental timeline in rats ventilated with moderate tidal volume (VT) after hydrochloric acid (HCl) aspiration (Top) and in previously normal rats with ventilator induced lung injury (VILI) by large VT ventilation (Bottom). In rats with aspiration, imaging was performed without interrupting moderate VT ventilation. In normal rats, high volume ventilation was suspended and VT was set at 12 ml/kg during each image acquisition, including baseline.
