Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Improved aeration of the lungs bilaterally , particularly on the right . Heart is normal in size and configuration and cardiomediastinal borders are unremarkable . There is interval removal of one of the chest tubes , the other remains stable in its position . The pleural effusion on the right has somewhat decreased in size and there is better expansion of the right lower lobe . The left lung remains unchanged . No pneumothorax . There is also an area of pleural thickening adjacent to the right lower lobe , which appears to be unchanged as well .
    OUTPUT:
    
Improved aeration of the right lower lobe and mild decrease in the size of the effusion .