Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post median sternotomy and CABG . The cardiac silhouette size is normal . The aorta remains mildly tortuous with atherosclerotic calcifications noted at the aortic knob pulmonary vasculature is normal . Hilar contours are unremarkable . Lungs are hyperinflated with flattening of the diaphragms . Linear opacities within both lung bases are unchanged , and likely reflect areas of subsegmental atelectasis / scarring . No focal consolidation , pleural effusion or pneumothorax is present . There are no acute osseous abnormalities .
    OUTPUT:
    
No acute cardiopulmonary abnormality . Lung hyperinflation compatible with history of COPD .