Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest were reviewed and compared to the prior studies . Small bilateral pleural effusions have decreased since ___ . Aeration of the left lower lobe and mild bibasilar opacities due to atelectasis have improved since ___ . Top normal heart size and a small hiatal hernia are unchanged .
    OUTPUT:
    
1 . Small bilateral pleural effusions have improved since ___ . 2 . Mild bibasilar atelectasis has improved since ___ , less likely pneumonia .