Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . Heart size is mildly enlarged . The aorta is diffusely calcified . There is crowding of the bronchovascular structures , but no overt pulmonary edema is present . Small bilateral pleural effusions are noted . Hazy opacification in the retrocardiac region may reflect atelectasis though infection can not be excluded . There is likely a moderate hiatal hernia . Biapical scarring with calcifications is present . No acute osseous abnormality is detected .
    OUTPUT:
    
1 . Small bilateral pleural effusions with hazy retrocardiac opacity , possibly atelectasis though infection is not excluded . 2 . Possible moderate size hiatal hernia , which could be better assessed with a lateral radiograph .