Patent ID: 8693636

Claim:
A method for operating an x-ray device comprising an x-ray tube operable with a tube voltage, comprising: providing a computerized control unit of said x-ray device with at least one parameter that establishes or describes a desired image quality of defined tissue of a patient to be examined with said x-ray device; in said control unit, determining a value of the tube voltage of the x-ray tube to generate at least one image of said defined tissue with said image quality, based on a dependency of a contrast of the defined tissue on a spectrum of x-ray radiation emitted by said x-ray tube associated with said value of said tube voltage, and to maintain a contrast-to-noise ratio that achieves the image quality designated or described by said parameter while simultaneously producing a dose of x-ray radiation applied to the patient that is as low as possible; and from said control unit, setting a value of said tube voltage, as a set value of said tube voltage, at said x-ray tube and operating said x-ray tube and said x-ray device to acquire at least one x-ray projection of said defined tissue, with said set value of said tube voltage, to generate at least one image of said defined tissue with said image quality.