Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is normal . The hilar and mediastinal contours are normal . No focal consolidations , pleural effusions , or pneumothorax is identified . There is evidence of subdiaphragmatic air , likely secondary to patient 's recent procedure .
    OUTPUT:
    
No acute focal consolidations suggestive of pneumonia . Subdiaphragmatic air , likely secondary to patient 's recent surgery .