Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours appear unchanged . There is no pleural effusion or pneumothorax . The lungs appear clear . There is mild similar S - shaped curvature of the visualized thoracolumbar spine . Patchy vascular calcifications are noted along the abdominal aorta . There is no free air .
    OUTPUT:
    
No evidence of acute cardiopulmonary process . No free air identified .