Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest . The lungs are clear without focal consolidation , effusion , or pulmonary vascular congestion . Previously seen retrocardiac opacity and effusion are no longer visualized . The cardiomediastinal silhouette is stable . Median sternotomy wires again noted . No acute osseous abnormalities .
    OUTPUT:
    
No acute cardiopulmonary process .