Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours appear stable including mild cardiomegaly and a large hiatal hernia . There is no pleural effusion or pneumothorax . Slight blunting at the right costophrenic sulcus is probably due to minor scarring . The lungs appear clear .
    OUTPUT:
    
No evidence of acute cardiopulmonary disease .