Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are persistent small bilateral effusions . The lungs are otherwise clear without confluent consolidation or pulmonary edema . The cardiomediastinal silhouette is stable . Median sternotomy wires and mediastinal clips are again noted .
    OUTPUT:
    
Persistent small effusions without superimposed acute cardiopulmonary process .