Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post median sternotomy and CABG . Heart size is normal . Mediastinal and hilar contours are unchanged with diffuse atherosclerotic calcification of the thoracic aorta . The pulmonary vasculature is normal . Scattered granulomas are seen throughout the lungs . No focal consolidation , pleural effusion or pneumothorax is seen . Bronchiectasis and scarring is re - demonstrated in the right upper lobe . There is no pleural effusion or pneumothorax . Subdiaphragmatic free air bilaterally is compatible with pneumoperitoneum , likely related to peritoneal dialysis .
    OUTPUT:
    
1 . No acute cardiopulmonary abnormality . 2 . Pneumoperitoneum likely related to peritoneal dialysis .