Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest radiographs were obtained . The lungs are well expanded and clear . There is no consolidation , effusion , or pneumothorax . The thoracic aorta is chronically enlarged and tortous but neither focally dilated nor appreciably changed for more than ___ years . Cardiac and mediastinal contours are otherwise normal . Eventration or Bochdalek hernia involving the posterior left hemidiaphragm is unchanged . Median sternotomy wires are intact .
    OUTPUT:
    
No acute cardiopulmonary process .