Copyright information:Taken from "Percutaneous subclavian artery stent-graft placement following failed ultrasound guided subclavian venous access"BMC Medical Imaging 2006;6():3-3.Published online 5 May 2006PMCID:PMC1526717.5 F sheath. A late phase image demonstrates the right internal mammary artery (white arrow) and the right vertebral artery (black arrow).