Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable semi-erect chest film ___ at 18 :04 is submitted .
    OUTPUT:
    
Overall cardiac and mediastinal contours are likely unchanged . There are patchy and streaky opacities at both bases which more likely reflect atelectasis rather than aspiration or pneumonia but clinical correlation is advised . No pulmonary edema or pneumothorax . No large effusions . Multiple left - sided old rib fractures are seen .