Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are hyperinflated , suggestive of underlying COPD . Heart size is normal . The aortic knob is calcified . Mediastinal and hilar contours are within normal limits . The pulmonary vasculature is normal . Minimal streaky left basilar opacity could reflect early infection or atelectasis . No pleural effusion or pneumothorax is present . No acute osseous abnormalities are detected .
    OUTPUT:
    
Streaky left basilar opacity could reflect early infection or atelectasis .