Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear . The cardiac and mediastinal contours are normal . There are no pleural effusions . No pneumothorax is seen . No free air is seen under the hemidiaphragms .
    OUTPUT:
    
1 . No free air under the hemidiaphragms . 2 . No acute cardiac or pulmonary process .