Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: No implanted Port -A - Cath is seen . Again seen is a metallic stent within the SVC . Previously noted tracheostomy tube is not clearly visualized . There is a focal narrowing in the upper trachea again noted . A linear peripheral opacity projecting over the right upper lung is likely a small scar . Lungs are clear . No new focal consolidation , pleural effusion , or pneumothorax . Cardiomediastinal silhouette is unchanged .
    OUTPUT:
    
1 . No evidence of a left - sided Port - A - Cath . 2 . No acute cardiopulmonary process .