Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright and lateral views of the chest are provided . There is vague opacity at the right lung base which is concerning for pneumonia . The left lung appears clear . Cardiomediastinal silhouette is normal . No pneumothorax . No effusion . Bony structures are intact .
    OUTPUT:
    
Opacity at the right lung base concerning for pneumonia .