Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest . There is persistent blunting of left costophrenic angle laterally suggestive of underlying scarring or pleural thickening . The lungs are otherwise clear . Cardiomediastinal silhouette is within normal limits . Median sternotomy wires and mediastinal clips again noted .
    OUTPUT:
    
No acute cardiopulmonary process .