Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest were provided . There is persistent blunting of the left CP angle which likely represents a small residual pleural effusion . Trace effusion is also likely present on the right . In general , there has been improved aeration at the right lung base . There is likely residual compressive atelectasis at the left lung base . The mid and upper lungs appear well aerated . The cardiomediastinal silhouette appears normal . Bony structures are intact .
    OUTPUT:
    
Interval improvement in lower lung aeration with persistent effusions , left greater than right , with probable mild left basilar atelectasis .