They were the first company to utilize the concept of the rotating anode, something which is just about universal in medical X-ray systems at this date. Towards the end of the time of manufacture, they were producing oil-circulating X-ray tubes with a heat exchanger attached (for use with computed tomography (CT) scanners), with 5-inch diameter rotating anodes formed from tungsten-rhenium alloy and molybdenum, with a large mass of graphite attached to act as a heat sink. Smaller tubes without graphite heat sinks had highly radiative coatings to disperse the generated heat into the oil surrounding the tube itself.