An accessory has a substantially radiolucent frame, a floor-supported base, and a support structure extending between the base and one end of the frame. A second end of the frame is coupleable to a surgical table in a manner that permits the frame to articulate relative to the surgical table. The support structure is extendable and retractable to change the height at which the first end of the frame is supported above the base. The support structures is able to tilt front to rear and side to side relative to the base and the frame is able to tilt front to rear and side to side relative to the support structure. The frame is movable to a compact storage position having the second end of the frame supported on the base. A set of wheels are provided on the base to permit the accessory to be wheeled from one location to another.