Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared with the prior radiograph , there are unchanged but opacities posteriorly along the diaphragmatic contours , likely due to localized diaphragmatic defects , either congenital or acquired . Cardiac silhouette , , mediastinal , and hilar contours are unchanged . No focal consolidation , pleural effusion , or pneumothorax . Calcified tortuous aorta is again seen . Remote left sixth posterior rib fracture is again seen .
    OUTPUT:
    
No acute cardiopulmonary process . Please see dedicated rib films for discussion of osseous structures .