Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are hyperexpanded and show no significant parenchymal opacities . The cardiac silhouette is top normal . The mediastinal silhouette shows a tortuous aorta . A left subclavian Port - A - Cath terminates in the distal SVC appropriately .
    OUTPUT:
    
No acute intrathoracic process .