Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well inflated and clear . The cardiomediastinal silhouette and hilar contours are stable with a tortuous aorta . There is no pleural effusion or pneumothorax . Persistent asymmetric elevation of the right hemidiaphragm is unchanged . Left chest pacemaker and leads , mitral valve prosthesis , and median sternotomy wires are again noted .
    OUTPUT:
    
No acute cardiopulmonary process .