Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours are normal . The pulmonary vascularity is normal . Linear scarring within the left lung base is unchanged . Lungs are otherwise clear . No pleural effusion , focal consolidation or pneumothorax is identified . No acute osseous abnormality is present .
    OUTPUT:
    
No acute cardiopulmonary abnormality .