Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright portable chest radiograph is obtained as well as a lateral view . There are small bilateral pleural effusions with mild compressive bibasilar atelectasis . There is no significant change from prior exam . There is no overt CHF . A mild component of interstitial congestion is impossible to exclude . The aorta is unfolded . Heart size is normal . No pneumothorax . Bony structures are intact .
    OUTPUT:
    
Small bilateral pleural effusions with bibasilar compressive atelectasis . Possible mild interstitial edema .