Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Improved lung volumes as a result of a better inspiratory level result in resolution of the previously seen right lower lobe opacity , which likely represented atelectasis . Cardiomediastinal silhouette is normal . No pleural effusion or pneumothorax .
    OUTPUT:
    
Improved aeration of the lungs resulting in resolution of the right lower lobe opacity , which likely represented atelectasis .