Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Patient is status post median sternotomy and CABG . Heart size is top normal . Mediastinal and hilar contours are unchanged . Pulmonary vasculature is not engorged . Minimal atelectasis is noted in the left lung base . Remainder of the lungs are clear without focal consolidation . No pleural effusion or pneumothorax is present . There are mild degenerative changes seen in the thoracic spine . Spinal stimulator device leads are noted overlying the lower thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary abnormality .