Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP and lateral views of the chest are compared to previous exam from ___ . Linear opacity in the right middle lobe is compatible with scarring . The lungs are otherwise clear . Cardiomediastinal silhouette is within normal limits . Catheter within the anterior soft tissues of the chest wall , likely a peritoneal shunt . The proximal left humeral hardware is again noted . Osseous and soft tissue structures are unchanged .
    OUTPUT:
    
No acute cardiopulmonary process .