Functional Respiratory Imaging of Airways in ARDS

This is a prospective single-center cohort trial to compare regional bronchial recruitment, bronchial distention and alveolar recruitment in 6 patients with acute respiratory distress syndrome (ARDS). The investigators used CT scan images as the imaging modality, and the subjects were scanned on end-expiratory lung volume with different positive end-expiratory pressures. Those images were post-processed to evaluate the airways.