Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest demonstrate stable mild cardiomegaly . The mediastinal and hilar contours are within normal limits . The lungs are hyperexpanded with diaphragmatic flattening , consistent with emphysema . Moderate atherosclerotic calcifications are seen along the entire extent of thoracic aorta , involving the arch . The lungs are clear . There is no pneumothorax , vascular congestion , or pleural effusion . There is no appreciable compression deformity in the thoracic spine .
    OUTPUT:
    
1 . No evidence of pneumonia . 2 . Emphysema .