An extension cable is adapted for use in an intravascular ultrasound system. It has a first connector, for connecting to a catheter and a second connector for connecting to a patient interface module. A cable arrangement provides power transmission, data transmission and data signal processing (amplification or regeneration) between the first and second connectors. The extension cable enables sterility to be maintained in a workflow in a time efficient and easy manner as the catheter to extension cable connection may remain in a sterile environment.
