Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post median sternotomy , CABG , and mitral valve replacement . Heart size remains mildly enlarged , stable . The mediastinal and hilar contours are unchanged . Atherosclerotic calcifications are noted at the aortic knob . The pulmonary vasculature is normal . Linear opacities in the left lower lobe likely reflect subsegmental atelectasis . Left lateral basilar pleural thickening is unchanged . No new focal consolidation , pleural effusion or pneumothorax is present . No acute osseous abnormalities demonstrated .
    OUTPUT:
    
No acute cardiopulmonary abnormality .