Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The previously seen diffuse mild interstitial abnormality on the chest radiograph from ___ is not appreciated on today 's study . 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 findings . 2 . No free air under the diaphragm