Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is normal . The mediastinal and hilar contours are unremarkable , and the pulmonary vasculature is normal . Apart from minimal atelectasis in the left lung base , there is no focal consolidation , pleural effusion or pneumothorax identified . Multiple old left - sided rib fractures are noted , but no acutely displaced fractures are seen .
    OUTPUT:
    
No acute cardiopulmonary abnormality . No acutely displaced rib fractures seen .