Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is normal in size . The mediastinal and hilar contours appear within normal limits . There are no pleural effusions or pneumothorax . Aside from patchy basilar opacities most suggestive of minor atelectasis in association with low lung volumes , the lungs appear clear . The bony structures are unremarkable .
    OUTPUT:
    
Slight basilar opacities suggestive of mild volume loss with no definite evidence for acute disease .