Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are hyperinflated but clear . Previously noted pleural effusions are no longer visualized . Cardiomediastinal silhouette is within normal limits . Prosthetic aortic valve and median sternotomy wires are again noted . No acute osseous abnormalities .
    OUTPUT:
    
No acute cardiopulmonary process .