Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lungs are grossly clear . Cardiomediastinal silhouette is unchanged . The left pectoral pacemaker is in appropriate position . Median sternotomy wires are intact and well aligned . No pneumothorax . Mild bibasilar atelectasis is noted .
    OUTPUT:
    
No acute cardiopulmonary process .