Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is mildly enlarged . The mediastinal contour is within normal limits . Pulmonary vascularity is normal . Minimal streaky opacity in left lung base likely reflects atelectasis , and no focal consolidation is present . No pleural effusion or pneumothorax is identified . There are no acute osseous abnormalities .
    OUTPUT:
    
Minimal atelectasis in the left lung base .