Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single portable AP view of the chest is compared to previous exam from ___ . The lungs are clear of focal consolidation . There is , however , persistent blunting of the right costophrenic angle , potentially due to pleural thickening especially in the setting of multiple prior healed right rib fractures . Cardiomediastinal silhouette is stable . No visualized free air below the diaphragm .
    OUTPUT:
    
No acute cardiopulmonary process . No visualized free air .