Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Patient is status post median sternotomy and CABG . The cardiac silhouette size is normal . Mediastinal and hilar contours are unchanged . Pulmonary vasculature is not engorged . Apart from subsegmental bibasilar atelectasis , the lungs are clear . No focal consolidation , pleural effusion or pneumothorax is identified . No acute osseous abnormalities are visualized .
    OUTPUT:
    
No acute cardiopulmonary abnormality .