There are radiating bubble-like lucencies from the hilum of both lungs, greater on the right.  Features here are of pulmonary interstitial emphysema which has occurred secondary to over-ventilation.

Oftentimes, the clinical teams simply adjust ventilatory pressures and watch as the chest radiograph findings resolve.

These images are from Dr. Paula Brill's excellent pediatric radiology collection. Dr. Brill is a professor in the department of radiology (pediatric section) at Weill Cornell. This case was donated to Radiopaedia.org by Radswiki.net