Premature newborn on a ventilator Pediatric Imaging Chest November 15, 2020 CXR AP (above) shows symmetrical ground glass opacity in the lungs. CXR AP obtained after decreasing ventilator settings (below) shows interval decreased aeration of the right upper lobe. The diagnosis was atelectasis caused by hypoventilation in a patient with respiratory distress syndrome. Related Published November 15, 2020