Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views were reviewed . The cardiomediastinal and hilar contours are stable with a tortuous enlarged descending aorta , compatible with known aortic dissection status post repair . There is no pleural effusion or pneumothorax . The lungs are well expanded and clear . Pulmonary vasculature is within normal limits . The patient is status post median sternotomy with surgical clips overlying the mediastinum and right axilla . A left posterior rib defect is also likely post surgical .
    OUTPUT:
    
No acute cardiopulmonary process .