Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Overall appearance of the chest is unchanged compared to prior studies . There is persistent elevation of the right hemidiaphragm . The heart is normal in size , with stable medial style contours and tortuosity of the thoracic aorta . No displaced rib fracture , pneumothorax , or pleural effusion is identified .
    OUTPUT:
    
No acute cardiopulmonary process .