Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest . Heart size and cardiomediastinal contours are normal . There is a mild diffuse interstitial abnormality consistent with mild emphysema as well as mild bibasilar atelectasis , but no focal consolidation , pleural effusion , or pneumothorax . No displaced rib fracture is appreciated .
    OUTPUT:
    
No displaced rib fracture or pleural effusion . Mild emphysema .