Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest . Linear opacity at the left lung base is unchanged and could be due to scarring given its persistence . Elsewhere the lungs are clear . Post thoracotomy changes identified posteriorly and laterally on the right with overlying surgical ___ . There is no effusion . Cardiomediastinal silhouette is within normal limits . Dual - lumen left chest wall port is seen in unchanged position . Cervicothoracic spinal anterior spinal hardware is identified .
    OUTPUT:
    
No acute cardiopulmonary process .