Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A single frontal radiograph of the chest was acquired . The lungs are clear . The heart size is normal . The mediastinal contours are normal . There are no pleural effusions . No pneumothorax is seen . There is no free air under the diaphragm .
    OUTPUT:
    
1 . No acute cardiac or pulmonary process . 2 . No free air under the diaphragm .