Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are hyperinflated . Heart size is borderline . The aorta is mildy unfolded , with minimal calcification of the aortic knob . Possible mild prominence of the hila with a tapered appearance , which could reflect pulmonary hypertension . Cardiomediastinal silhouette otherwise within normal limits , without evidence of widening on radiographs . No chf , focal infiltrate , effusion , or ptx detected .
    OUTPUT:
    
No evidence of acute pulmonary process .