Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Minimal basilar opacities are better characterized on concurrent CT and are consistent with atelectasis . No confluent consolidation is identified to suggest pneumonia . There is no pneumothorax . No pulmonary edema or pleural effusions are identified . Cardiomediastinal and hilar contours are within normal limits .
    OUTPUT:
    
Minimal bibasilar atelectasis , though no evidence of pneumonia .