Patents by Inventor Tobias Schön
Tobias Schön 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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Patent number: 11119055Abstract: A method for operating an X-ray system having the steps of “manually setting the first and a second position for the manipulator on a trajectory by means of a virtual input unit”, “recording or simulating recording from the first and second positions” and “representing the two X-ray recordings”.Type: GrantFiled: February 1, 2019Date of Patent: September 14, 2021Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.Inventors: Mahmoud Amr, Tobias Schoen
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Patent number: 11057536Abstract: The invention refers to a system for analyzing a document. Each of two measurement arrangements includes two components being a radiation source and a radiation detector, respectively. The two measurement arrangements provide measurement data and differ from each other with regard to a measurement principle, a kind of radiation source, a kind of radiation detector, a kind of relative movement between the document and a component, a kind of relative arrangement of the two components to each other, a kind of emitted radiation, a kind of received radiation or a kind of processing information about radiation emitted by the respective radiation source and/or about radiation received by the respective radiation detector. An evaluator provides data based on the measurement data. The invention also refers to a corresponding method.Type: GrantFiled: February 18, 2020Date of Patent: July 6, 2021Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.Inventors: Tobias Schoen, Wolfgang Holub, Daniel Stromer, Andreas Maier, Gisela Anton, Michel Thilo, Martin Vossiek, Jan Schuer
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Patent number: 11026653Abstract: A method for calibrating an X-ray system having a radiation source and a radiation detector has the steps of establishing a kinematic model for at least one position, setting starting values, calibrating and solving a system of equations by means of minimizing. The system of equations is set up by the respective established kinematic model of the X-ray system, wherein the system of equations has respective sets of kinematic parameters for each position, and parameters to be calibrated which are usually equal over all the positions. In the step of setting the starting values, the parameters to be calibrated are set and, based on these, in the step of calibrating, at least one recording is taken by means of calibration bodies so that a comparison of the measuring results to respective references results in an error measure. This error measure is minimized when solving the system of equations.Type: GrantFiled: January 29, 2019Date of Patent: June 8, 2021Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.Inventors: Mahmoud Amr, Tobias Schoen
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Publication number: 20200186666Abstract: The invention refers to a system for analyzing a document. Each of two measurement arrangements includes two components being a radiation source and a radiation detector, respectively. The two measurement arrangements provide measurement data and differ from each other with regard to a measurement principle, a kind of radiation source, a kind of radiation detector, a kind of relative movement between the document and a component, a kind of relative arrangement of the two components to each other, a kind of emitted radiation, a kind of received radiation or a kind of processing information about radiation emitted by the respective radiation source and/or about radiation received by the respective radiation detector. An evaluator provides data based on the measurement data. The invention also refers to a corresponding method.Type: ApplicationFiled: February 18, 2020Publication date: June 11, 2020Inventors: Tobias SCHOEN, Wolfgang HOLUB, Daniel STROMER, Andreas MAIER, Gisela ANTON, Michel THILO, Martin VOSSIEK, Jan SCHUER
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Publication number: 20190159748Abstract: A method for calibrating an X-ray system having a radiation source and a radiation detector has the steps of establishing a kinematic model for at least one position, setting starting values, calibrating and solving a system of equations by means of minimizing. The system of equations is set up by the respective established kinematic model of the X-ray system, wherein the system of equations has respective sets of kinematic parameters for each position, and parameters to be calibrated which are usually equal over all the positions. In the step of setting the starting values, the parameters to be calibrated are set and, based on these, in the step of calibrating, at least one recording is taken by means of calibration bodies so that a comparison of the measuring results to respective references results in an error measure. This error measure is minimized when solving the system of equations.Type: ApplicationFiled: January 29, 2019Publication date: May 30, 2019Inventors: Mahmoud AMR, Tobias SCHOEN
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Publication number: 20190162680Abstract: A method for operating an X-ray system having the steps of “manually setting the first and a second position for the manipulator on a trajectory by means of a virtual input unit”, “recording or simulating recording from the first and second positions” and “representing the two X-ray recordings”.Type: ApplicationFiled: February 1, 2019Publication date: May 30, 2019Inventors: Mahmoud AMR, Tobias SCHOEN
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Patent number: 10134156Abstract: In a method and an evaluation device for the evaluation of projection data of an object being examined, which are determined along a trajectory in a multiplicity of projection positions relative to a co-ordinate origin, a particular trajectory function is determined for the projection positions, for each of a multiplicity of positions from a reconstruction region of dimension n by establishing an offset (d) and a direction vector at the co-ordinate origin, establishing a hyperplane of dimension n?1 which runs perpendicular to the direction vector and has an offset to the co-ordinate origin, establishing a number of intersection points where the hyperplane intersects the trajectory, establishing a derivative vector of the trajectory according to its trajectory path and calculating the derivative vector in the projection position, and establishing an absolute value of a scalar product between the derivative vector and the position and dividing the absolute value by the number.Type: GrantFiled: June 16, 2015Date of Patent: November 20, 2018Assignees: Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V., Universität des SaarlandesInventors: Steven Oeckl, Alfred K. Louis, Tobias Schön
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Publication number: 20170323461Abstract: In a method and an evaluation device for the evaluation of projection data of an object being examined, which are determined along a trajectory in a multiplicity of projection positions relative to a co-ordinate origin, a particular trajectory function is determined for the projection positions, for each of a multiplicity of positions from a reconstruction region of dimension n by establishing an offset (d) and a direction vector at the co-ordinate origin, establishing a hyperplane of dimension n?1 which runs perpendicular to the direction vector and has an offset to the co-ordinate origin, establishing a number of intersection points where the hyperplane intersects the trajectory, establishing a derivative vector of the trajectory according to its trajectory path and calculating the derivative vector in the projection position, and establishing an absolute value of a scalar product between the derivative vector and the position and dividing the absolute value by the number.Type: ApplicationFiled: June 16, 2015Publication date: November 9, 2017Applicant: Fraunhofer-Gessellschaft zur Förderung der angewandten Forschung e.V.Inventors: Steven OECKL, Alfred K. LOUIS, Tobias SCHÖN
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Patent number: 8781064Abstract: A multi-dimensional representation of an object is obtained in that first and second pictures of the object illuminated using an X-ray source are created using a sensor that is located, in relation to the X-ray source, behind the object in a preferential direction defined by the relative positions of the object and of the sensor. A distance in the preferential direction between the X-ray source and the object is different in the first picture than in the second picture. The multi-dimensional representation of the object is obtained by combining the first and second pictures.Type: GrantFiled: December 4, 2012Date of Patent: July 15, 2014Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.Inventors: Theobald Fuchs, Tobias Schoen, Randolf Hanke
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Publication number: 20130236881Abstract: The invention relates to a method for producing column-shaped or conical nanostructures, wherein the substrate surface is covered with an arrangement of metal nanoparticles and etched, the nanoparticles acting as an etching mask and the etching parameters being set such that column structures or cone structures are created below the nanoparticles and the nanoparticles are preserved as a structural coating.Type: ApplicationFiled: May 30, 2011Publication date: September 12, 2013Applicant: Max-Planck-Gesellschaft zur Foerderung der Wissensdchaften e.V.Inventors: Joachim P. Spatz, Claudia Pacholski, Tobias Schoen, Lindarti Purwaningsih, Tobias Wolfram
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Patent number: 8345817Abstract: A multi-dimensional representation of an object is obtained in that first and second pictures of the object illuminated using an X-ray source are created using a sensor that is located, in relation to the X-ray source, behind the object in a preferential direction defined by the relative positions of the object and of the sensor. A distance in the preferential direction between the X-ray source and the object is different in the first picture than in the second picture. The multi-dimensional representation of the object is obtained by combining the first and second pictures.Type: GrantFiled: April 9, 2009Date of Patent: January 1, 2013Assignee: Fraunhofer-Gesellschaft zur Foerderung der Angewandten Forschung E.V.Inventors: Theobald Fuchs, Tobias Schoen, Randolf Hanke
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Patent number: 8229061Abstract: In an X-ray computer tomograph and a method for examining a component by means of X-ray computer tomography, the component carries out a movement relative to a radiation source detector unit in at least two degrees of freedom of movement, so at least one trajectory can be produced which spans a three-dimensional space. Since the X-radiation has a three-dimensional radiation geometry, volume data can be rapidly obtained and precisely reconstructed to form a three-dimensional X-ray image. The component can be geometrically measured by means of a geometry detection unit.Type: GrantFiled: April 21, 2009Date of Patent: July 24, 2012Assignee: Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.Inventors: Randolf Hanke, Theobald Fuchs, Tobias Schön, Michael Maisl, Stefan Kasperl
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Publication number: 20110110487Abstract: A multi-dimensional representation of an object is obtained in that first and second pictures of the object illuminated using an X-ray source are created using a sensor that is located, in relation to the X-ray source, behind the object in a preferential direction defined by the relative positions of the object and of the sensor. A distance in the preferential direction between the X-ray source and the object is different in the first picture than in the second picture. The multi-dimensional representation of the object is obtained by combining the first and second pictures.Type: ApplicationFiled: April 9, 2009Publication date: May 12, 2011Inventors: Theobald Fuchs, Tobias Schoen, Randolf Hanke
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Publication number: 20110103546Abstract: In an X-ray computer tomograph and a method for examining a component by means of X-ray computer tomography, the component carries out a movement relative to a radiation source detector unit in at least two degrees of freedom of movement, so at least one trajectory can be produced which spans a three-dimensional space. Since the X-radiation has a three-dimensional radiation geometry, volume data can be rapidly obtained and precisely reconstructed to form a three-dimensional X-ray image. The component can be geometrically measured by means of a geometry detection unit.Type: ApplicationFiled: April 21, 2009Publication date: May 5, 2011Inventors: Randolf Hanke, Theobald Fuchs, Tobias Schön, Michael Maisl, Stefan Kasperl
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Publication number: 20100266181Abstract: A CT reconstruction of an object including a high-resolution object region of interest may be produced in an artefact-free manner by producing a first projection data set of a first region of the object that encloses the object region of interest and includes at least one projection recording of a first resolution, and a second projection data set of the object region of interest including at least a second projection recording of a second, higher resolution. The first and second projection data sets may be combined, in accordance with a combination rule, so as to obtain a CT reconstruction of the first region of the object having the first resolution and of the object region of interest having the second, higher resolution.Type: ApplicationFiled: April 30, 2009Publication date: October 21, 2010Inventors: Steven Oeckl, Theobald Fuchs, Tobias Schoen