Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post median sternotomy and CABG . The lung volumes are low . Heart size is normal . The aorta is mildly tortuous and diffusely calcified . The mediastinal and hilar contours are otherwise unremarkable . Pulmonary vasculature is not engorged . Streaky linear opacities are seen in both lung bases , more pronounced on the left , and likely reflect areas of atelectasis or scarring . No focal consolidation , pleural effusion or pneumothorax is present . Elevation of the left hemidiaphragm appears chronic . Multiple remote right - sided rib fractures are again demonstrated . There has been prior resection of the distal right clavicle . Moderate degenerative changes are noted in the thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary abnormality .