Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac silhouette is enlarged but stable in size . Aorta is tortuous . Previously present bibasilar atelectasis has substantially improved . Small bilateral pleural effusions are present , decreased on the left and slightly decreased on the right since the prior radiograph . Permanent pacemaker remains in place with two leads terminating in the right ventricle , unchanged in position since prior chest radiographs dating back to ___ .
    OUTPUT:
    
Small bilateral pleural effusions .