MAMMOMAT 3000 Nova features an X-ray tube which, unlike other mammography systems, uses two different anode materials. The Opdose function auto-selects the best kV value and anode/filter combination (Mo/Mo, Mo/Rh, W/Rh) according to the individual breast characteristics in order to achieve optimal image quality with the lowest possible dose. The resulting images are of convincing quality and retakes are reduced to a minimum.