Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal and hilar contours are within normal limits . Increased opacity at the left lower lobe is concerning for pneumonia or aspiration . The right lung is clear . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
Increased opacity at the left lower lobe is concerning for pneumonia or aspiration . Short interval follow up with chest radiograph is recommended upon completion of treatment to document resolution .