Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Low bilateral lung volumes . Increased patchy opacity at the right lung base may reflect atelectasis or pneumonia in the proper clinical context . Unchanged appearance of the left lung with a retrocardiac opacity and haziness along the lateral hemithorax . The size of the cardiac silhouette is mildly enlarged . The tip of the left PICC line projects over the superior cavoatrial junction .
    OUTPUT:
    
Increasing opacity at the right lung base may reflect pneumonia in the proper clinical context . Relatively unchanged appearance of the left lower lobe and retrocardiac opacity .