Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is top - normal in size . Cardiomediastinal and hilar contours are within normal limits . Lung volumes are slightly low which accentuates bronchovascular markings . Given that , there are increasing patchy bibasilar opacities , left greater than right , which could reflect atelectasis ; however , infection should be considered in the appropriate clinical setting . No pneumothorax or pleural effusion .
    OUTPUT:
    
Worsening bibasilar opacities may reflect atelectasis , although infection should be considered in the appropriate clinical setting .