Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A single upright AP radiograph of the chest is provided . There are bilateral opacities densest in the bilateral lower lobes . This appearance favors an infectious or inflammatory process over atelectasis . Heart size is minimally enlarged . There is no pneumothorax or pleural effusion .
    OUTPUT:
    
Bilateral lower lobe opacities which are concerning for an infectious or inflammatory process .