Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP and lateral views of the chest were reviewed . The heart size is top normal , exaggerated by AP projection . The mediastinal and hilar contours are normal . There is no pleural effusion or pneumothorax . The lungs are well - expanded and clear . The pulmonary vasculature is within normal limits .
    OUTPUT:
    
Heart size top - normal .