Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Rib fractures seen on previous CT scan are not able to be visualized on this chest radiograph . No focal consolidation , pleural effusion or pulmonary edema is seen , and the cardiac and mediastinal contours are normal .
    OUTPUT:
    
Rib fractures previously seen on CT scan are not able to be detected on this chest radiograph .