Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Subtle left base streaky opacity most likely represents atelectasis , although in the appropriate clinical setting , an underlying consolidation is not excluded . The right lung is clear . No pleural effusion or pneumothorax is seen . The cardiac and mediastinal silhouettes are stable . Mild degenerative changes are seen along the spine . No displaced fracture is seen .
    OUTPUT:
    
Subtle left base streaky opacity most likely represents atelectasis , although in the appropriate clinical setting , an underlying consolidation is not excluded .