Abstract: A biopsy unit is configured with a marker unit having at least one marker such that a treatment point can be displayed in accordance with the guidance of a biopsy needle on the surface of an object to be examined. The coordinates of a determined tissue alteration within an object to be examined are used in order to align the marker unit.

Abstract: As apparatus components, a computed tomography apparatus has at least a rotating X-ray generator and an operating unit, between which data can be exchanged wirelessly via a radio link on the basis of radio waves or microwaves. A rotating X-ray generator device of a computed tomography apparatus has a generator unit and a transmission and/or reception device allocated thereto for transmitting and/or receiving electromagnetic broadcast signals. This allows a wireless data transmission while avoiding wiper rings. The bluetooth standard or a GSM or UMTS standard can be employed as standards.

Abstract: An x-ray generator wherein the tube current is kept constant independently of the drop in the cathode temperature after the radiation is switched on has a control circuit for the tube filament current in which a correction value that corresponds to the drop in the tube current given constant filament current during the radiation phase due to the drop in temperature of the cathode is superimposed on the rated value of the filament current at the beginning of radiation.