Patents by Inventor Peter Roehrer
Peter Roehrer has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20250095947Abstract: A rotary piston X-ray source including a housing, a rotary piston X-ray source, and a magnetic deflection unit. The rotary piston X-ray source is mounted inside the housing to be rotatable about an axis of rotation relative to the housing. The magnetic deflection unit includes at least one multipole and is disposed outside the rotary piston. The at least one multipole has at least four magnetic poles, which are disposed about the axis of rotation and include coil windings. The magnetic poles further define a multipole plane on which a central axis of the at least one multipole is perpendicularly centered, and the at least one multipole is arranged such that the central axis of the at least one multipole and the axis of rotation span a surface.Type: ApplicationFiled: September 18, 2024Publication date: March 20, 2025Applicant: Siemens Healthineers AGInventors: Florian HOLCH, Michael WIESSNER, Florian SEPERANT, Dieter MATUSZOK, Peter ROEHRER
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Publication number: 20240145205Abstract: A target structure for generation of x-ray radiation may include a heat sink; and a target element for electrons to strike, the target element being in the heat sink to cool the target element, wherein the heat sink includes a metal-diamond composite material.Type: ApplicationFiled: October 28, 2022Publication date: May 2, 2024Applicant: Siemens Healthcare GmbHInventors: Sven MUELLER, Lars FUHRMANN, Tobias HEINKE, Marvin MOELLER, Joerg FREUDENBERGER, Stefan WILLING, Peter ROEHRER
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Patent number: 11557452Abstract: An x-ray emitter includes an x-ray tube and an x-ray emitter housing. In an embodiment, the x-ray tube includes an evacuated x-ray tube housing, a cathode for emitting electrons and an anode for generating x-rays as a function of the electrons. Further, in an embodiment, the x-ray emitter housing includes the x-ray tube and outside of the x-ray tube, a gaseous cooling medium. In an embodiment, the x-ray emitter further includes a compressor for a forced convection of the gaseous cooling medium for cooling the x-ray tube, a pressure ratio between the intake side and pressure side of the compressor being greater than 1.3.Type: GrantFiled: September 8, 2020Date of Patent: January 17, 2023Assignee: Siemens Healthcare GmbHInventors: Lukas Havla, Anja Fritzler, Peter Roehrer
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Publication number: 20210082655Abstract: An x-ray emitter includes an x-ray tube and an x-ray emitter housing. In an embodiment, the x-ray tube includes an evacuated x-ray tube housing, a cathode for emitting electrons and an anode for generating x-rays as a function of the electrons. Further, in an embodiment, the x-ray emitter housing includes the x-ray tube and outside of the x-ray tube, a gaseous cooling medium. In an embodiment, the x-ray emitter further includes a compressor for a forced convection of the gaseous cooling medium for cooling the x-ray tube, a pressure ratio between the intake side and pressure side of the compressor being greater than 1.3.Type: ApplicationFiled: September 8, 2020Publication date: March 18, 2021Applicant: Siemens Healthcare GmbHInventors: Lukas HAVLA, Anja FRITZLER, Peter ROEHRER
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Patent number: 10537294Abstract: An X-ray device for an inverse computer tomography configuration, includes a plurality of X-ray emitters and a detector arranged opposite the X-ray emitters. The X-rays emitted by the X-ray emitters can be detected by the detector after at least partly passing through an examination region located in the intermediate region between the X-ray emitters and the detector. In an embodiment, the X-ray emitters are grouped into at least two mutually spaced sub-arrangements. Each sub-arrangement comprises multiple X-ray emitters. The spacing between the at least two sub-arrangements is greater than the spacing between adjacent X-ray emitters of at least one of the sub-arrangements.Type: GrantFiled: May 19, 2016Date of Patent: January 21, 2020Assignee: SIEMENS HEALTHCARE GMBHInventors: Joerg Freudenberger, Peter Roehrer
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Publication number: 20180192968Abstract: An X-ray device for an inverse computer tomography configuration, includes a plurality of X-ray emitters and a detector arranged opposite the X-ray emitters. The X-rays emitted by the X-ray emitters can be detected by the detector after at least partly passing through an examination region located in the intermediate region between the X-ray emitters and the detector. In an embodiment, the X-ray emitters are grouped into at least two mutually spaced sub-arrangements. Each sub-arrangement comprises multiple X-ray emitters. The spacing between the at least two sub-arrangements is greater than the spacing between adjacent X-ray emitters of at least one of the sub-arrangements.Type: ApplicationFiled: May 19, 2016Publication date: July 12, 2018Applicant: Siemens Healthcare GmbHInventors: Joerg FREUDENBERGER, Peter ROEHRER
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Patent number: 7816853Abstract: A cathode has an emission layer that thermionically emits electrons upon exposure with a laser beam. The material of the emission layer has a product of density (?), measured in kg m 3 , heat capacity (Cp), measured in J kg ? ? K and heat conductivity (?), measured in W mK that is, at room temperature, maximally 500,000 J 2 m 4 ? K 2 ? s . Such a cathode has an improved thermionic emission of electrons.Type: GrantFiled: August 8, 2008Date of Patent: October 19, 2010Assignee: Siemens AktiengesellschaftInventors: Joerg Freudenberger, Sven Fritzler, Manfred Fuchs, Detlef Mattern, Peter Roehrer, Peter Schardt
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Patent number: 7508917Abstract: An x-ray radiator has an anode that emits x-rays, a cathode that thermionically emits electrons upon irradiation thereof by a laser beam, a voltage source for application of a high voltage between the anode and the cathode for acceleration of the emitted electrons toward the anode to form an electron beam, a vacuum housing, an insulator that is part of the vacuum housing and that separates the cathode from the anode, an arrangement for cooling components of the x-ray radiator, a deflection and arrangement that deflects the laser beam from a stationary source, that is arranged outside of the vacuum housing, to a spatially stationary laser focal spot on the cathode.Type: GrantFiled: May 23, 2007Date of Patent: March 24, 2009Assignee: Siemens AktiengesellscahftInventors: Ronald Dittrich, Joerg Freudenberger, Sven Fritzler, Manfred Fuchs, Detlef Mattern, Peter Roehrer, Peter Schardt
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Publication number: 20090060141Abstract: An x-ray apparatus that has at least one radiator module (1) with a vacuum housing. The at least one radiator module is arranged at least partially around an examination space. The apparatus has an anode segment and, opposite the anode segment, at least two potential-separated cathode segments are arranged in the vacuum housing. The cathode segments thermionically emit electrons upon exposure with laser light. The electrons strike the anode segment and generate x-ray radiation of corresponding energy. Such an x-ray apparatus is more simple structured in terms of design.Type: ApplicationFiled: August 29, 2008Publication date: March 5, 2009Inventors: Sven Fritzler, Peter Roehrer, Peter Schardt
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Patent number: 7496179Abstract: An x-ray unit has an x-ray radiator having an anode that emits x-rays upon being struck by electrons, a cathode that thermionically emits electrons upon irradiation thereof by a laser beam, electrical connections for application of a high voltage between the anode and the cathode to accelerate the emitted electrons toward the anode as an electron beam, a vacuum housing that can be rotated around an axis, an insulator that is part of the vacuum housing and that separates the cathode from the anode, a drive that rotates the vacuum housing around its axis, an arrangement for cooling components of the x-ray radiator, and an arrangement that directs the laser beam from a stationary source, arranged outside of the vacuum housing, onto a spatially stationary laser focal spot on the cathode and that focuses the laser beam.Type: GrantFiled: May 23, 2007Date of Patent: February 24, 2009Assignee: Siemens AktiengesellschaftInventors: Joerg Freudenberger, Sven Fritzler, Manfred Fuchs, Matthias Maier, Detlef Mattern, Peter Roehrer, Peter Schardt
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Publication number: 20090041195Abstract: A cathode has an emission layer that thermionically emits electrons upon exposure with a laser beam. The material of the emission layer has a product of density (?), measured in kg m 3 , heat capacity (Cp), measured in J kg ? ? K and heat conductivity (?), measured in W mK that is, at room temperature, maximally 500,000 J 2 m 4 ? K 2 ? s . Such a cathode has an improved thermionic emission of electrons.Type: ApplicationFiled: August 8, 2008Publication date: February 12, 2009Inventors: Joerg Freudenberger, Sven Fritzler, Manfred Fuchs, Detlef Mattern, Peter Roehrer, Peter Schardt
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Publication number: 20070274452Abstract: An x-ray unit has an x-ray radiator having an anode that emits x-rays upon being struck by electrons, a cathode that thermionically emits electrons upon irradiation thereof by a laser beam, electrical connections for application of a high voltage between the anode and the cathode to accelerate the emitted electrons toward the anode as an electron beam, a vacuum housing that can be rotated around an axis, an insulator that is part of the vacuum housing and that separates the cathode from the anode, a drive that rotates the vacuum housing around its axis, an arrangement for cooling components of the x-ray radiator, and an arrangement that directs the laser beam from a stationary source, arranged outside of the vacuum housing, onto a spatially stationary laser focal spot on the cathode and that focuses the laser beam.Type: ApplicationFiled: May 23, 2007Publication date: November 29, 2007Inventors: Joerg Freudenberger, Sven Fritzler, Manfred Fuchs, Matthias Maier, Detlef Mattern, Peter Roehrer, Peter Schardt
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Publication number: 20070274454Abstract: An x-ray radiator has an anode that emits x-rays when struck by electrons, a cathode that thermionically emits electrons upon irradiation thereof by a laser beam, a voltage source for application of a high voltage between the anode and the cathode for acceleration of the emitted electrons towards the anode to form an electron beam. A surface of the cathode that can be irradiated by the laser beam is at least partially roughened and/or doped and/or is formed of an intermetallic compound or vitreous carbon.Type: ApplicationFiled: May 23, 2007Publication date: November 29, 2007Inventors: Joerg Freudenberger, Sven Fritzler, Manfred Fuchs, Detlef Mattern, Peter Roehrer, Peter Schardt
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Publication number: 20070274453Abstract: An x-ray radiator has an anode that emits x-rays, a cathode that thermionically emits electrons upon irradiation thereof by a laser beam, a voltage source for application of a high voltage between the anode and the cathode for acceleration of the emitted electrons toward the anode to form an electron beam, a vacuum housing, an insulator that is part of the vacuum housing and that separates the cathode from the anode, an arrangement for cooling components of the x-ray radiator, a deflection and arrangement that deflects the laser beam from a stationary source, that is arranged outside of the vacuum housing, to a spatially stationary laser focal spot on the cathode.Type: ApplicationFiled: May 23, 2007Publication date: November 29, 2007Inventors: Ronald Dittrich, Joerg Freudenberger, Sven Fritzler, Manfred Fuchs, Detlef Mattern, Peter Roehrer, Peter Schardt