Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well - expanded . There is a left basilar hazy opacities , new when compared to prior . Superiorly , lungs are clear . Cardiac silhouette is top - normal . Tortuosity of the thoracic aorta is again noted . No acute osseous abnormalities .
    OUTPUT:
    
Subtle hazy left basilar opacity , potentially atelectasis noting that infection would be possible in the proper clinical setting .