Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . Minimal atherosclerotic calcifications are demonstrated at the aortic knob . Mediastinal and hilar contours are otherwise within normal limits . The pulmonary vasculature is normal . Lungs are clear without focal consolidation , pleural effusion or pneumothorax . No acute osseous abnormality is visualized .
    OUTPUT:
    
No acute cardiopulmonary abnormality .