Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lungs are clear . The heart size is top normal in size . The hilar contours and pleural surfaces are unremarkable . No pneumothorax , pleural effusions , or pulmonary edema . Unknown metallic objects are far anterior to the chest , possibly external .
    OUTPUT:
    
1 . No acute cardiopulmonary process .