The GE HealthCare part number 5139563, also known as the Infiniband Adapter – 6U cPCI, 2 Port, 4X Copper or Infiniband Board, is a network interface card used in GE MRI systems, specifically the GE Signa Excite HD series. It is a refurbished or used and tested part that helps in the communication and data transfer within the MRI scanner.