Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal and hilar contours are within normal limits . The lungs show no consolidation , pleural effusion or pneumothorax . Subtle streaky opacities at the lung bases likely reflect atelectasis .
    OUTPUT:
    
Trace bibasilar atelectasis . No focal consolidation or pleural effusion .