Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is again mild - to - moderately enlarged . There is similar tortuosity of the aorta . The main pulmonary artery contour is again prominent . The lungs appear clear . There are no pleural effusions or pneumothorax .
    OUTPUT:
    
No evidence of acute disease . Similar prominent main pulmonary artery contour .