Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest were acquired . The heart is normal in size . There is slight unfolding of the descending thoracic aorta . The mediastinal contours are otherwise normal . There are no pleural effusions . No pneumothorax is seen . The lungs are clear .
    OUTPUT:
    
No acute cardiac or pulmonary findings .