Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral images of the chest . The lungs are well expanded and clear . There is no pleural effusion or pneumothorax . The cardiomediastinal silhouette is unremarkable . There is an irregularity in posterior rib 8 on the right consistent with an old fracture . The visualized osseous structures are otherwise unremarkable .
    OUTPUT:
    
No acute cardiopulmonary findings .