Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is mildly enlarged . Mediastinal and hilar contours are unchanged with atherosclerotic calcifications noted within the aortic knob and descending thoracic aorta . The pulmonary vasculature is normal . Minimal linear opacities in the lung bases may reflect scarring or subsegmental atelectasis . Lungs are otherwise clear without focal consolidation , pleural effusion or pneumothorax . There are no acute osseous abnormalities .
    OUTPUT:
    
No acute cardiopulmonary abnormality .