Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post sternotomy and aortic valve replacement . The heart is mild to moderately enlarged . The mediastinal and hilar contours appear unchanged . There is no pleural effusion or pneumothorax . The lungs appear clear . There is mildly exaggerated kyphotic curvature centered along the mid thoracic spine with small anterior osteophytes .
    OUTPUT:
    
No evidence of acute disease .