Patents by Inventor Peter Röhrer
Peter Röhrer 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: 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: 9257255Abstract: A single-pole x-ray emitter includes an emitter housing, in which an x-ray tube with a vacuum housing and a drive motor are arranged. A cathode that generates an electron beam, and a rotating anode that is struck by the electron beam along a focal path are arranged in the vacuum housing. The vacuum housing includes a drive-side housing wall and an anode-side housing wall, and the rotating anode is held in a torsionally rigid manner on an anode tube that is rotatably mounted on a stationary part of a rotor shaft that is coupled to the drive motor. The stationary part of the rotor shaft is joined to the anode-side housing wall of the vacuum housing via a ring-shaped fixing. The anode tube incorporates a temperature compensation element. The focal path is arranged on a side of the rotating anode that faces away from the anode-side housing wall.Type: GrantFiled: February 9, 2014Date of Patent: February 9, 2016Assignee: Siemens AktiengesellschaftInventors: Ronald Dittrich, Jörg Freudenberger, Jan Matschulla, Ernst Neumeier, Peter Röhrer
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Publication number: 20150043718Abstract: A single-pole x-ray emitter includes an emitter housing, in which an x-ray tube with a vacuum housing and a drive motor are arranged. A cathode that generates an electron beam, and a rotating anode that is struck by the electron beam along a focal path are arranged in the vacuum housing. The vacuum housing includes a drive-side housing wall and an anode-side housing wall, and the rotating anode is held in a torsionally rigid manner on an anode tube that is rotatably mounted on a stationary part of a rotor shaft that is coupled to the drive motor. The stationary part of the rotor shaft is joined to the anode-side housing wall of the vacuum housing via a ring-shaped fixing. The anode tube incorporates a temperature compensation element. The focal path is arranged on a side of the rotating anode that faces away from the anode-side housing wall.Type: ApplicationFiled: February 9, 2014Publication date: February 12, 2015Inventors: Ronald Dittrich, Jörg Freudenberger, Jan Matschulla, Ernst Neumeier, Peter Röhrer
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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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Patent number: 7443957Abstract: 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.Type: GrantFiled: October 10, 2006Date of Patent: October 28, 2008Assignee: Siemens AktiengesellschaftInventors: Jörg Freudenberger, Ernst Neumeier, Peter Röhrer, Matthias Seufert
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Patent number: 7412033Abstract: An x-ray radiator has a vacuum housing that can rotate around an axis, a cathode that thermionically emits electrons upon irradiation thereof by a laser beam, an anode that emits x-rays upon being struck by the electrons, an insulator that is part of the vacuum housing and that separates the cathode from the anode, electrodes or terminals to apply a high voltage between the anode and the cathode to accelerate the emitted electrons toward the anode to form an electron beam, a drive arrangement for rotation of the vacuum housing around its axis, an arrangement for cooling components of the x-ray radiator, and an arrangement that directs and focuses the laser beam from a stationary source that is arranged outside of the vacuum housing onto a spatially stationary laser focal spot on the cathode.Type: GrantFiled: September 12, 2006Date of Patent: August 12, 2008Assignee: Siemens AktiengesellschaftInventors: Jörg Freudenberger, Sven Fritzler, Manfred Fuchs, Detlef Mattern, Peter Röhrer, Peter Schardt
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Patent number: 7369646Abstract: A rotating envelope radiator has a radiator housing surrounded by an external housing to form an intervening space in which a coolant flows. To prevent the formation, at high rotational frequencies, of reverse flows of the coolant in the intervening space, a flow conductor structure is provided in the intervening space that counteracts the formation of tangential flow components in the coolant.Type: GrantFiled: August 29, 2006Date of Patent: May 6, 2008Assignee: Siemens AktiengesellschaftInventors: Ronald Dittrich, Jörg Freudenberger, Detlef Mattern, Peter Röhrer, 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: 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: 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
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Patent number: 7197119Abstract: A high-performance anode plate for a directly cooled rotary piston x-ray tube is formed of a high-temperature-resistant material such as tungsten, molybdenum or a combination of both materials. In the region of the focal spot path, the underside of the anode plate is shaped, and/or in this region a different highly heat-conductive material is inserted or applied, such that an improved heat dissipation and thus a lower temperature gradient results.Type: GrantFiled: January 20, 2005Date of Patent: March 27, 2007Assignee: Siemens AktiengesellschaftInventors: Jörg Freudenberger, Peter Röhrer, Peter Schardt
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Patent number: 7189426Abstract: In a method for vapor-depositing a substrate with a layer of a needle-shaped x-ray fluorescent material containing at least one alkali metal, alkali halide phases and an alkali halide are mixed in a vapor phase and are vapor-deposited on the substrate. A needle-shaped fluorescent material is thereby produced having the formula ( ( M ? + ? H ? - ) a ? ( M ?? + ? H ?? - ) ( 1 - a ) ) k ? : ? ? ( M x ? + ? S y z + ? H x ? - ? H z * ? y ??? - ) b ? ( M x ?? + ? S y z + ? H x ?? - ? H z * ? y ??? - ) c ? ( M x ? + ? S y z + ? H x ?? - ? H z * ? y ??? - ) d ? ( M x ?? + ? S y z + ? H x ? - ? H z * ? y ??? - ) e wherein M+ is at least one metal ion from the group Na, K, Rb and Cs, H? is at least one halide from the group F, Cl, Br and I and Sz+ is at least one lanthanide ion from the group La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb or Lu.Type: GrantFiled: July 18, 2003Date of Patent: March 13, 2007Assignee: Siemens AktiengesellschaftInventors: Manfred Fuchs, Erich Hell, Wolfgang Knüpfer, Detlef Mattern, Peter Röhrer