Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The metallic pattern along the mid portion of a left brachiocephalic and subclavian stent shows irregularity along the mid portion of the stent where it crosses over the left first rib . This is probably due to an impression on the stent by the rib , but appears new since the prior CT , which was performed very shortly after placement . The cardiac , mediastinal and hilar contours appear within normal limits . The lungs appear clear . There are no pleural effusions or pneumothorax . There is similar mild relative elevation of the right hemidiaphragm .
    OUTPUT:
    
No evidence of acute cardiopulmonary disease . Irregularity of stent where it crosses the first rib ; although the stent does not appear collapsed , consultation with the interventional radiology service is suggested when clinically appropriate regarding the finding .