Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Comparison is made to ___ . The heart is normal in size . The mediastinal and hilar contours are unremarkable . There are hazy opacities at the lung bases bilaterally consistent with atelectasis . This is unchanged . The pulmonary vasculature is normal . There are no pleural effusions .
    OUTPUT:
    
Bibasilar atelectasis , unchanged .