Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are mildly decreased . Blunting of the bilateral costophrenic angles has not changed since at least ___ . Cardiac and mediastinal contours are normal . There is no evidence of pneumothorax or pneumomediastinum .
    OUTPUT:
    
No acute cardiopulmonary process , pneumothorax , or pneumomediastinum .