Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest . Findings : The patient is status post median sternotomy and CABG . Heart size is normal . Mediastinal and hilar contours are unchanged with mild calcification noted at the aortic arch . Pulmonary vasculature is normal and the lungs are clear . No focal consolidation , pleural effusion or pneumothorax is seen . There are mild degenerative changes in the thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary process .