Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lungs are fully expanded and clear . No pleural abnormalities . Heart size is normal . Cardiomediastinal and hilar silhouettes are unremarkable , noting pronounced tortuosity of the descending thoracic aorta . Incidental note is made of mild S - shaped scoliosis . Surgical clips are seen projecting over the bilateral upper quadrants . There has been interval removal of an inferior approach Swan - Ganz catheter .
    OUTPUT:
    
No acute intrathoracic process .