Inspiratory CXR (above) shows normal symmetrical aeration of the lungs bilaterally. Expiratory CXR (below) shows asymmetrical increased aeration (seen as increased lucency) of the right middle and lower lobes compared to the remainder of the lungs due to air trapping in the right middle and lower lobes.
The diagnosis was airway foreign body due to a peanut in the distal right mainstem bronchus.
