Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well inflated . There is a left lower lobe ill - defined peribronchial opacity concerning for pneumonia . There no pneumothorax nor pleural effusion appreciated . The cardiomediastinal and hilar silhouettes are normal . The heart size is normal . There is no acute bony abnormality nor evidence of acute fracture .
    OUTPUT:
    
1 . Left lower lobe pneumonia .