Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest were provided . Since the prior exam , left pleural effusion has decreased with improved aeration in the left lower lung . There is minimal right pleural effusion which persists and appears unchanged . No signs of edema or pneumothorax . The heart size appears stable . Bony structures are intact . No free air below the right hemidiaphragm .
    OUTPUT:
    
Small residual bilateral pleural effusions and lower lobe atelectasis , improved on the left .