Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is lateral left base opacity best seen on the frontal view , not well seen on the lateral view . The right lung is clear . The lungs remain relatively hyperinflated . No large pleural effusion or evidence of pneumothorax is seen . The cardiac silhouette is top - normal . The aortic knob is calcified . The mediastinal contours are otherwise unremarkable . The hilar contours are stable .
    OUTPUT:
    
Lateral left base opacity best seen on the frontal view , not well seen on the lateral view , atelectasis vs consolidation