Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single AP upright portable chest radiograph was obtained demonstrating lower lung airspace opacities which are concerning for pneumonia . Small effusions would be difficult to exclude . Heart size is difficult to assess but appears grossly unchanged . No pneumothorax is seen . Bony structure is intact .
    OUTPUT:
    
Opacities in the lower lungs concerning for pneumonia .