Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post median sternotomy . The cardiac , mediastinal and hilar contours are essentially unchanged with tortuosity of the thoracic aorta again noted . The pulmonary vascularity is normal . The lungs are clear without focal consolidation . No pleural effusion or pneumothorax is seen . There is no cardiac silhouette enlargement . Degenerative changes of left glenohumeral and acromioclavicular joint are noted .
    OUTPUT:
    
No acute cardiopulmonary abnormality .