Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . Mediastinal and hilar contours are within normal limits . Minimal atherosclerotic calcification is noted at the aortic knob . Lungs are clear . No focal consolidation , pleural effusion or pneumothorax is present . The pulmonary vasculature is normal no acute osseous abnormality is detected .
    OUTPUT:
    
No acute cardiopulmonary abnormality .