Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal and hilar contours are within normal limits . The lungs are well expanded . There is an area of increased opacity , best seen on the lateral view , projecting posteriorly and potentially projecting over the retrocardiac region in the frontal view concerning for pneumonia . There is no pleural effusion or pneumothorax . There is no pneumomediastinum or free air . Surgical clips are seen in the left upper quadrant .
    OUTPUT:
    
Increased opacity projecting posteriorly , best seen on the lateral view , and potentially projecting over the retrocardiac region in the frontal view is concerning for pneumonia . Short interval followup is recommended upon completion of treatment to document resolution .