X-ray tube with multiple differently sized focal spots and method for operating same

摘要

An x-ray tube has an anode whose target area is divided into regions formed of different materials, whereby focal spots of different size can be optionally generated in each of the regions. The focal spots belonging to one region are respectively generated at different locations but all focal spots are generated so close together that the focal position is essentially the same for all focal spots. An operating method for such an x-ray tube is also disclosed.