Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is biapical scarring with superior retraction of the hila as seen on previous exam . Elsewhere , lungs are clear without focal consolidation worrisome for infection or pulmonary edema . The cardiomediastinal silhouette is within normal limits . No acute osseous abnormalities .
    OUTPUT:
    
No acute cardiopulmonary process .