Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is normal . The aorta is slightly unfolded . Mediastinal and hilar contours are unremarkable . No focal consolidation , pleural effusion or pneumothorax is seen . Minimal streaky linear opacity in the left lung base likely reflects atelectasis . There are no acute osseous abnormalities .
    OUTPUT:
    
Minimal left basilar atelectasis .