Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest demonstrate top normal heart size . The mediastinal and hilar contours are unremarkable . The lungs are clear . There is no pneumothorax , vascular congestion , or pleural effusion .
    OUTPUT:
    
Top normal heart size . No definite evidence to suggest acute cardiopulmonary process .