Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . Mediastinal and hilar contours are unremarkable . Pulmonary vascularity is normal . Nodular area of opacification in the left mid lung field was not clearly demonstrated on the prior radiograph . No other areas of focal consolidation , pleural effusion or pneumothorax are demonstrated . Healed fracture of the left 8th rib is seen , superior to the left nipple shadow . Numerous radiopaque circular ovoid structures are seen within the upper abdomen , likely reflecting ingested pills within the bowel . Clips are noted in the upper abdomen related to prior cholecystectomy .
    OUTPUT:
    
Rounded opacity in the left mid lung field , possibly reflecting an area of infection .