Abstract: An X-ray source device includes an anode to generate X-rays; a drive to rotate the anode about an anode central axis, the drive including a stator and a first rotor, and the first rotor being rotationally fixed relative to the anode; and a cooling facility to cool at least one of the anode and the drive using a coolant. The drive includes a second rotor to circulate the coolant.

Abstract: An X-ray source device includes an anode to generate X-rays; a drive to rotate the anode about an anode central axis, the drive including a stator and a first rotor, and the first rotor being rotationally fixed relative to the anode; and a cooling facility to cool at least one of the anode and the drive using a coolant. The drive includes a second rotor to circulate the coolant.

Abstract: A flat emitter is disclosed. In an embodiment, the flat emitter includes an emitter surface, which upon application of a heating voltage, emits electrons; a first end area, which has a first support rod; and a second end area, which has a second support rod. At least one first support rod has a narrow section extending in a longitudinal direction and is bonded to the first end area or a second support rod, which has a narrow section extending in a longitudinal direction and is bonded to the second end area. A flat emitter of this kind is structurally simple and offers a high level of electron emission at the same time as a longer useful life.

Abstract: A radiation source for a radiation-based image acquisition device has an electron emitter to generate a focal spot for x-ray generation at a rotating anode. An arrangement is provided to generate an asymmetrical power input profile of the focal spot parallel to the movement direction of the rotating anode.

Abstract: A radiation source for a radiation-based image acquisition device has an electron emitter to generate a focal spot for x-ray generation at a rotating anode. An arrangement is provided to generate an asymmetrical power input profile of the focal spot parallel to the movement direction of the rotating anode.

Abstract: An x-ray apparatus has a cooling device for cooling of the anode, through which cooling device cooling fluid flows. To improve the cooling effect, the coolant is water and a pressure generation device is provided for generation of a water pressure of more than 1.1 bar acting at least in a region of the anode to be cooled.

Abstract: A rotating envelope tube has a housing which with an x-ray exit window that is essentially transparent for x-ray radiation. To improve the mechanical stability, the x-ray exit window internally exhibits a structure through which cooling fluid can flow.

Abstract: For reducing of the weight of leakage x-ray radiation shielding for a rotary piston x-ray tube that rotates in a cooling medium in a radiator housing of an x-ray radiator, the rotary piston x-ray tube having a rotary anode and a cathode fixedly connected with the vacuum housing thereof, the vacuum housing has at least one first region of a total shielding and the radiator housing has at least a second region of the total shielding. Only the respective regions of the vacuum housing and the radiator housing has that are irradiated by the leakage x-ray radiation are provided with shielding.

Abstract: An x-ray apparatus that accepts an x-ray radiator therein has shielding for the x-ray leakage radiation originating from the x-ray radiator that is an Integral component of (built into) the x-ray apparatus. An x-ray radiator with an x-ray tube and a housing in which the x-ray tube is contained is composed only of materials that are not suitable for absorption of x-rays.

Abstract: In an expansion device for an x-ray apparatus, in particular with a rotary piston x-ray tube with a sealed coolant and/or insulation volume under a minimum pressure and pressing with this minimum pressure against an elastic pressure element, an elastic pressure element with a linear force-displacement characteristic curve (in particular in the form of a gas pressure spring with a linear elastic characteristic curve) is provided to prevent an excessive pressure load given a temperature rise.

Abstract: A rotating envelope tube has a housing which with an x-ray exit window that is essentially transparent for x-ray radiation. To improve the mechanical stability, the x-ray exit window internally exhibits a structure through which cooling fluid can flow.

Abstract: An x-ray apparatus has a cooling device for cooling of the anode, through which cooling device cooling fluid flows. To improve the cooling effect, the coolant is water and a pressure generation device is provided for generation of a water pressure of more than 1.1 bar acting at least in a region of the anode to be cooled.

Abstract: To enlarge the angle range to be covered, with a simultaneously smaller variance of the focal spots, in a gantry for a computed tomography at least two x-ray tubes are provided for generation of an x-ray beam instead of a single x-ray tube. The respective x-ray beams of the x-ray tubes cover a defined examination region and a defined region of the detector device in the axial direction of the gantry substantially without overlapping with one another.

Abstract: In a method for operating a computed tomography apparatus, having an x-ray source rotatable around a system axis and a radiation detector with a detector-proximate beam-gating diaphragm, and a patient support, a spiral scan of a patient on the patient support is conducted by rotating the x-ray source around the system axis while moving the subject on the patient support substantially parallel to the system axis. The diaphragm have movable absorber elements that are curved, and are moved independently of each other toward and away from each other in a direction substantially parallel to the system axis during the spiral scan. The absorber elements are dynamically adjusted in an asymmetrical manner during the spiral scan to reduce overexposure of the examination subject to x-rays.

Abstract: In an expansion device for an x-ray apparatus, in particular with a rotary piston x-ray tube with a sealed coolant and/or insulation volume under a minimum pressure and pressing with this minimum pressure against an elastic pressure element, an elastic pressure element with a linear force-displacement characteristic curve (in particular in the form of a gas pressure spring with a linear elastic characteristic curve) is provided to prevent an excessive pressure load given a temperature rise.

Abstract: For reducing of the weight of leakage x-ray radiation shielding for a rotary piston x-ray tube that rotates in a cooling medium in a radiator housing of an x-ray radiator, the rotary piston x-ray tube having a rotary anode and a cathode fixedly connected with the vacuum housing thereof, the vacuum housing has at least one first region of a total shielding and the radiator housing has at least a second region of the total shielding. Only the respective regions of the vacuum housing and the radiator housing has that are irradiated by the leakage x-ray radiation are provided with shielding.

Abstract: In a method for operating a computed tomography apparatus, having an x-ray source rotatable around a system axis and a radiation detector with a detector-proximate beam-gating diaphragm, and a patient support, a spiral scan of a patient on the patient support is conducted by rotating the x-ray source around the system axis while moving the subject on the patient support substantially parallel to the system axis. The diaphragm have movable absorber elements that are curved, and are moved independently of each other toward and away from each other in a direction substantially parallel to they system axis during the spiral scan. The absorber elements are dynamically adjusted in an asymmetrical manner during the spiral scan to reduce overexposure of the examination subject to x-rays.

Abstract: A patient support device for a radiation therapy system has a load-bearing element, which is set up so as to be supported rotatably on a stationary structure about a vertical iso-axis extending through a treatment iso-center. The load-bearing element, with a patient tabletop mounted on it, can be leveled by a continuously adjustable leveling device. The leveling device is embodied in particular as a leveling shoe, which includes a bottom plate, a top plate, and an adjustable wedge disposed between them.

Abstract: To enlarge the angle range to be covered, with a simultaneously smaller variance of the focal spots, in a gantry for a computed tomography at least two x-ray tubes are provided for generation of an x-ray beam instead of a single x-ray tube. The respective x-ray beams of the x-ray tubes cover a defined examination region and a defined region of the detector device in the axial direction of the gantry substantially without overlapping with one another.

Abstract: A radiation diaphragm for an X-ray apparatus has an absorber element that can be swiveled around a swiveling axis for the variable limitation of a ray bundle. The swiveling axis is oriented transversely to the ray bundle. A swivel arm that can be swiveled around the swiveling axis and that carries the absorber element. The absorber element can comprise a curved shape. Such a radiation diaphragm allows an especially effective radiation dose limitation for the patient.