Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Blunting of the left costophrenic angle is unchanged , consistent with prior empyema and decortication and reactive thickening / pleural scarring . The lungs are clear . There is no large pleural effusion or pneumothorax . The cardiomediastinal silhouette is normal .
    OUTPUT:
    
No acute cardiopulmonary process .