Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest radiograph demonstrate low lung volumes . Hazy parahilar densities are seen . There is obscuration of the left hemidiaphragm , which may reflect a component of atelectasis though infection can not be excluded . The heart is enlarged , unchanged since prior examination . Aortic arch calcifications are noted . Trace bilateral pleural effusions are seen .
    OUTPUT:
    
Enlarged heart with hazy parahilar densities reflective of early congestive heart failure . Trace bilateral pleural effusions .