Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest demonstrate low lung volumes . There has been interval resolution of the previously seen subtle reticulonodular opacities in the right upper lung . Again seen is a right lower lobe opacity which is more prominent on the current radiograph . Cardiomediastinal and hilar contours are unremarkable . There is no pneumothorax or pleural effusion .
    OUTPUT:
    
Persistent opacity in the right lower lobe may represent resolving pneumonia .