Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest were provided . There is airspace opacity in the left mid to lower lung , best seen on the frontal projection , new from prior and concerning for pneumonia . The right lung is clear . No effusion or pneumothorax . Cardiomediastinal silhouette is normal . Bony structures are intact .
    OUTPUT:
    
Vague opacity in the left mid to lower lung concerning for pneumonia .