Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: No focal consolidation , pleural effusion or pneumothorax is seen . The cardiac and mediastinal silhouettes are stable . There is stable linear scarring / atelectasis at the left lung base . Old left - sided rib fractures including the posterior left fourth through sixth ribs again seen .
    OUTPUT:
    
No acute cardiopulmonary process .