Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are within normal limits . The heart appears mildly enlarged with mild left ventricular enlargement . Previous median sternotomy noted with surgical clips consistent with coronary artery bypass grafting . No consolidation , pneumothorax or pleural effusion seen . The visualized bony structures are unremarkable in appearance .
    OUTPUT:
    
No acute cardiopulmonary process seen .