Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are relatively well inflated and clear . The heart is top - normal in size . The cardiomediastinal silhouette is unchanged . Median sternotomy wires and a left chest wall pulse generator device are unchanged in position . Fracture of one of the sternotomy wires is unchanged . There is no pneumothorax , pleural effusion , or overt pulmonary edema .
    OUTPUT:
    
No acute cardiopulmonary abnormality .