Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest demonstrate well expanded lungs . Again seen is blunting of the bilateral costophrenic angles , which may represent trace pleural effusion / pleural thickening , and is unchanged from the most recent prior study . The cardiomediastinal and hilar contours are unchanged . There is no pneumothorax , or focal consolidation .
    OUTPUT:
    
No acute cardiopulmonary process .