Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is top - normal . The hilar and mediastinal contours are normal . The lung volumes are low . Streaky opacities in the lung bases bilaterally , secondary to mild atelectasis , have increased compared to the most recent prior exam . No focal consolidations concerning for pneumonia are identified . There is no pneumothorax or pleural effusion . The visualized osseous structures are unremarkable .
    OUTPUT:
    
No focal consolidations concerning for pneumonia identified . Increased mild bibasilar atelectasis .