Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post median sternotomy and CABG . The heart size is normal . The mediastinal and hilar contours are unremarkable . Pulmonary vasculature is normal . Subsegmental atelectasis is demonstrated in the lingula . The remainder the lungs are clear without focal consolidation . No pleural effusion or pneumothorax is seen . There are mild degenerative changes noted in the thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary abnormality .