Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is not enlarged . Aorta is slightly tortuous . The lungs are well - expanded and grossly clear . No CHF , focal infiltrate , effusion , or pneumothorax is detected . The right - greater - than - left hila are slightly prominent , but are unchanged compared with ___ . Incidental note is made of an old healed left midclavicular fracture .
    OUTPUT:
    
No acute pulmonary process identified . Doubt significant change compared with ___ .