Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are bilateral lower lobe infiltrates and increased lung markings throughout the lungs . There tiny bilateral effusions . There is volume loss in the lower lobes . The heart size is upper limits of normal .
    OUTPUT:
    
Bilateral lower lobe infiltrates . These could be infectious . Given the overall increase in lung markings is unclear if a more chronic process is present . Old films would be helpful for comparison