Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Midline tracheostomy tube is again seen . No focal consolidation seen there is no pleural effusion or pneumothorax . The cardiac and mediastinal silhouettes are unremarkable . Prior fractures of the posterior lateral left third and fourth rib with some callus formation are seen .
    OUTPUT:
    
No acute cardiopulmonary process seen radiographically .