Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is mildly enlarged . Patient is status post median sternotomy and CABG . Atherosclerotic calcifications are noted predominately about the aortic arch . Pulmonary vasculature is normal . Hilar contours are unremarkable . Subsegmental atelectasis is demonstrated in both lung bases . No focal consolidation , pleural effusion or pneumothorax is detected . There is no subdiaphragmatic free air noted .
    OUTPUT:
    
No acute cardiopulmonary abnormality . No subdiaphragmatic free air .