Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright portable view of the chest provided . There is vague opacity in the left perihilar and left lower lung which could represent very early pneumonia . The right lung is clear . Lung volumes are low . The cardiomediastinal silhouette is normal . No large effusion or pneumothorax . Bony structures are intact .
    OUTPUT:
    
Vague perihilar and left lower lung opacity which could represent a very early pneumonia . Dedicated PA and lateral view would be helpful to confirm .