Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs demonstrate an enlarged cardiomediastinal silhouette , which could be in part due to patient rotation . Sternal wires are intact . The patient is status post coronary artery bypass and mitral valve replacement . Apparent asymmetric mild opacity of the right lung is likely due to patient rotation . There is mild bibasilar atelectasis . No focal consolidation , pleural effusion , or pneumothorax is seen .
    OUTPUT:
    
No acute cardiopulmonary process .