A system includes a component that updates a registration between an image space coordinate system and an interventional space coordinate system based on interventional device position information within a patient obtained from intermediate image data indicative of the interventional device location and a position sensor that is located on an interventional device within the patient. The cart is comprised of a generally rectangular, open frame structure comprised of a plurality of elongated structural members. An air passage is formed in the interior of the exhaust duct between the air inlet and the air outlet.