Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are multiple median sternotomy wires and mediastinal clips consistent with prior coronary artery bypass graft surgery . The cardiomediastinal silhouette is stable . The pulmonary vasculature is not engorged and there is no overt pulmonary edema . The hilar contours are within normal limits . Aside from minimal bibasilar atelectasis , the lungs are clear without focal consolidation , pleural effusion or pneumothorax . There is no evidence of free air beneath the right hemidiaphragm .
    OUTPUT:
    
No evidence of free air beneath the diaphragms . No acute cardiopulmonary process .