Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Bilateral lower lobe hazy opacities , left slightly obscuring the left hemidiaphragm , are most likely atelectasis . However , in the appropriate clinical setting , pneumonia is on the differential . The lungs are otherwise clear . No pleural effusions or pneumothorax . The cardiac silhouette is slightly enlarged compared to prior . The right Port - A - Cath terminates in cavoatrial junction .
    OUTPUT:
    
Bilateral lower lobe opacities most likely is atelectasis . However , in the proper clinical setting , pneumonia is on the differential .