Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is mildly enlarged , unchanged from prior . There is no pleural effusion or pneumothorax . Mild fullness of the right hilum is seen dating back to ___ . No focal consolidation is seen . Linear opacity at the left lung base likely represents atelectasis . There is no acute osseous abnormality .
    OUTPUT:
    
No definite signs of pneumonia . Lateral view may aid in overall assessment if there is strong clinical concern .