Patents by Inventor Matthias Gebhardt

Matthias Gebhardt 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).

  • Publication number: 20220065961
    Abstract: A magnet arrangement is for use in a magnetic resonance imaging system including at least one magnet including a high temperature superconductor to provide a magnetic field in an imaging volume for acquiring magnetic resonance imaging data. A magnetic resonance imaging system includes a magnet arrangement with at least one magnet, including a high temperature superconductor, to confine an imaging volume in at least one spatial direction. The magnetic resonance imaging system is configured to acquire magnetic resonance imaging data from at least a body region of a patient positioned in the imaging volume. Further a method is for manufacturing a magnet arrangement via an additive manufacturing device, including aligning a first magnet segment with a second magnet segment and bringing the first magnet segment into contact with the second magnet segment; and performing a joining process to bond the first magnet segment to the second magnet segment.
    Type: Application
    Filed: August 18, 2021
    Publication date: March 3, 2022
    Applicant: Siemens Healthcare GmbH
    Inventors: Matthias GEBHARDT, Michael MALLETT
  • Publication number: 20210341556
    Abstract: At least one example embodiment provides a magnetic resonance imaging system comprising a field generation unit and a supporting structure for providing structural support for the field generation unit, wherein the field generation unit comprises at least one magnet for generating a B0 magnetic field and an opening configured to provide access to an imaging volume positioned in the B0 magnetic field along at least one direction and wherein the at least one direction is angled with respect to a main direction of magnetic field lines of the B0 magnetic field in the imaging volume.
    Type: Application
    Filed: May 3, 2021
    Publication date: November 4, 2021
    Applicant: Siemens Healthcare GmbH
    Inventors: Michael MALLETT, Stefan POPESCU, Adrian Mark THOMAS, Stephan BIBER, Matthias GEBHARDT, Thorsten SPECKNER, Thomas BECK, Andreas GREISER
  • Publication number: 20210208219
    Abstract: A magnetic resonance apparatus, for acquiring magnetic resonance data from a person who is asleep, includes a person support apparatus to provide a sleeping place; an acquisition arrangement including a radiofrequency coil arrangement for transmitting excitation pulses and for receiving magnetic resonance signals; and a controller, designed to operate the acquisition arrangement according to a magnetic resonance sequence for acquiring a magnetic resonance dataset from a region under examination of the person. The magnetic resonance apparatus includes a main magnetic field of strength less than 20 mT, in particular less than 10 mT, and the controller includes an acquisition unit for acquiring a magnetic resonance dataset via a prolonged magnetic resonance sequence having a total acquisition duration of more than one hour.
    Type: Application
    Filed: December 22, 2020
    Publication date: July 8, 2021
    Applicant: Siemens Healthcare GmbH
    Inventors: Markus VESTER, Carmel HAYES, Stefan POPESCU, Mathias BLASCHE, Matthias GEBHARDT
  • Patent number: 10928466
    Abstract: In a magnetic resonance apparatus and a method for operation thereof, at least one electrical operating value of at least one predetermined component of the apparatus is captured and, as a function of the at least one operating value, at least one coil operating value of a transmitting coil arrangement of the magnetic resonance apparatus is controlled for the purpose of limiting a B1 value.
    Type: Grant
    Filed: May 10, 2017
    Date of Patent: February 23, 2021
    Assignee: Siemens Healthcare GmbH
    Inventors: Wolfgang Bielmeier, Gerhard Brinker, Swen Campagna, Bernd Erbe, Matthias Gebhardt, Juergen Nistler, Dominik Paul, Carsten Prinz, Gudrun Ruyters, Stephan Stoecker, Markus Vester
  • Patent number: 10823797
    Abstract: An apparatus and a method for spatial encoding in magnetic resonance tomography using a radio frequency signal are provided. A first set of parameters from a first frequency and from a first amplitude, and from a second frequency and a second amplitude is determined by the magnetic resonance tomograph, and corresponding signals are generated by a radio frequency device and transmitted by an antenna apparatus. A first gradient above the Larmor frequency of the nuclear spins is generated by the Bloch-Siegert effect. The same thing ensues with a second set of parameters that differs from the first set of parameters at least in one frequency or amplitude and therefore generates a second, different gradient.
    Type: Grant
    Filed: March 25, 2019
    Date of Patent: November 3, 2020
    Assignee: Siemens Healthcare Gmbh
    Inventors: Markus Vester, Ralf Kartäusch, Matthias Gebhardt, Peter Speier
  • Patent number: 10816624
    Abstract: A method for correcting a B0 inhomogeneity in a magnetic resonance scan with a magnetic resonance tomograph is provided. The magnetic resonance tomograph includes a controller, a radio frequency unit, and a transmitting antenna. In the method, the controller determines a transmission signal that is suitable for correcting an effect of an inhomogeneity of a static B0 magnetic field in an examination volume by the Bloch-Siegert effect. The transmission signal is emitted into the examination volume.
    Type: Grant
    Filed: March 25, 2019
    Date of Patent: October 27, 2020
    Assignee: Siemens Healthcare GmbH
    Inventors: Matthias Gebhardt, Ralf Kartäusch, Markus Vester
  • Patent number: 10663538
    Abstract: A method for monitoring a temporal change in a magnetic field in a magnetic resonance device, as well as an evaluation unit, a magnetic resonance device, and a computer program product for performing the method are provided. The method provides that a position-dependent magnetic field distribution that is produced by the plurality of gradient coils is provided with a plurality of monitoring points. In addition, time-dependent gradient values of the plurality of gradient coils are ascertained. Based on position-dependent magnetic field distribution and the time-dependent gradient values, the temporal change in the magnetic field is ascertained. The temporal change in the magnetic field is monitored by comparing the temporal change in the magnetic field with at least one limit value.
    Type: Grant
    Filed: September 9, 2017
    Date of Patent: May 26, 2020
    Assignee: Siemens Healthcare GmbH
    Inventors: Wolfgang Bielmeier, Gerhard Brinker, Swen Campagna, Nikolaus Demharter, Bernd Erbe, Matthias Gebhardt, Helmut Lenz, Jürgen Nistler, Dominik Paul, Carsten Prinz, Gudrun Ruyters, Stephan Stöcker, Markus Vester
  • Publication number: 20190293740
    Abstract: A method for correcting a B0 inhomogeneity in a magnetic resonance scan with a magnetic resonance tomograph is provided. The magnetic resonance tomograph includes a controller, a radio frequency unit, and a transmitting antenna. In the method, the controller determines a transmission signal that is suitable for correcting an effect of an inhomogeneity of a static B0 magnetic field in an examination volume by the Bloch-Siegert effect. The transmission signal is emitted into the examination volume.
    Type: Application
    Filed: March 25, 2019
    Publication date: September 26, 2019
    Inventors: Matthias Gebhardt, Ralf Kartäusch, Markus Vester
  • Publication number: 20190293739
    Abstract: An apparatus and a method for spatial encoding in magnetic resonance tomography using a radio frequency signal are provided. A first set of parameters from a first frequency and from a first amplitude, and from a second frequency and a second amplitude is determined by the magnetic resonance tomograph, and corresponding signals are generated by a radio frequency device and transmitted by an antenna apparatus. A first gradient above the Larmor frequency of the nuclear spins is generated by the Bloch-Siegert effect. The same thing ensues with a second set of parameters that differs from the first set of parameters at least in one frequency or amplitude and therefore generates a second, different gradient.
    Type: Application
    Filed: March 25, 2019
    Publication date: September 26, 2019
    Inventors: Markus Vester, Ralf Kartäusch, Matthias Gebhardt, Peter Speier
  • Patent number: 10401455
    Abstract: In a method and magnetic resonance (MR) apparatus for avoidance of artifacts in the acquisition of MR data, first and second undersampled datasets are recorded, the measurement data of each dataset being selected such that artifacts in the first dataset exhibit a phase other than in the second dataset, and the measurement data in the first and second datasets, even when combined, correspond to undersampled dataset. The recorded, undersampled datasets are supplemented with the use of a supplementary kernel of a parallel acquisition method to form supplemented datasets from which a combined, artifact-free dataset is produced. Measurement time is thereby reduced overall compared with customary PAT averaging and compared with recording without the use of a parallel acquisition method.
    Type: Grant
    Filed: September 8, 2017
    Date of Patent: September 3, 2019
    Assignee: Siemens Healthcare GmbH
    Inventors: Matthias Gebhardt, Mario Zeller
  • Patent number: 10379182
    Abstract: A circuit arrangement for an MRT system and a method for operating an MRT system are disclosed. The circuit arrangement includes a gradient amplifier having a switch-mode output stage, a regulator device, and a modulator connected therebetween in the circuit. To ensure patient safety, a control path is integrated into a drive path of the circuit arrangement or the MRT system provided for driving a gradient coil, the gradient coil being connected to an output of the switch-mode output stage. The control path includes a limiter stage connected downstream of the regulator device, the modulator, the switch-mode output stage and its supply voltage. The limiter stage is connected in the circuit between the regulator device and an input of the modulator, to limit a control signal output by the regulator device and limit the voltage for the gradient coil provided by the switch-mode output stage at its output.
    Type: Grant
    Filed: November 6, 2018
    Date of Patent: August 13, 2019
    Assignee: SIEMENS HEALTHCARE GMBH
    Inventors: Helmut Lenz, Matthias Gebhardt, Dirk Schneiderbanger, Roland Werner
  • Patent number: 10330756
    Abstract: In a method and an apparatus for magnetic resonance tomography, an eddy current field is compensated by taking into account its progression over time and its dependence on a sensed value, by having a sensor determine the sensed value and, on the basis of the sensed value, a current strength for a conductor in order to generate an opposing field to reduce the eddy current field is determined, and supplied to the conductor.
    Type: Grant
    Filed: December 2, 2016
    Date of Patent: June 25, 2019
    Assignee: Siemens Healthcare GmbH
    Inventors: Stephan Biber, Matthias Gebhardt, Andreas Krug
  • Patent number: 10288710
    Abstract: In a magnetic resonance (MR) apparatus and an operating method therefor, a sequence with which the MR data are to be recorded is created in or provided to a control computer of the MR apparatus. A maximum RF output and a maximum gradient performance of the scanner magnetic resonance apparatus during the performance of the sequence are determined by simulating or analyzing the performance of the sequence in the control computer, and it is verified whether the maximum RF output and/or the maximum gradient performance violate predetermined limit values. Execution of the sequence to record the MR data is performed only if the verification showed that the limit values are not violated.
    Type: Grant
    Filed: April 27, 2017
    Date of Patent: May 14, 2019
    Assignee: Siemens Healthcare GmbH
    Inventors: Wolfgang Bielmeier, Gerhard Brinker, Swen Campagna, Nikolaus Demharter, Bernd Erbe, Matthias Gebhardt, Juergen Nistler, Dominik Paul, Carsten Prinz, Gudrun Ruyters, Stephan Stoecker, Markus Vester
  • Publication number: 20190137580
    Abstract: A circuit arrangement for an MRT system and a method for operating an MRT system are disclosed. The circuit arrangement includes a gradient amplifier having a switch-mode output stage, a regulator device, and a modulator connected therebetween in the circuit. To ensure patient safety, a control path is integrated into a drive path of the circuit arrangement or the MRT system provided for driving a gradient coil, the gradient coil being connected to an output of the switch-mode output stage. The control path includes a limiter stage connected downstream of the regulator device, the modulator, the switch-mode output stage and its supply voltage. The limiter stage is connected in the circuit between the regulator device and an input of the modulator, to limit a control signal output by the regulator device and limit the voltage for the gradient coil provided by the switch-mode output stage at its output.
    Type: Application
    Filed: November 6, 2018
    Publication date: May 9, 2019
    Applicant: Siemens Healthcare GmbH
    Inventors: Helmut Lenz, Matthias Gebhardt, Dirk Schneiderbanger, Roland Werner
  • Publication number: 20180344198
    Abstract: In a method for optimizing a magnetic resonance (MR) examination to be performed with an MR scanner on a patient, a token is detected that identifies a medical aid that is to be present in the MR scanner during the examination, in particular to identify an implant implanted in the patient, a medical device to be used during the MR examination or a medical prosthesis worn by the patient. At least one restriction for the planned MR examination is determined in a computer as a function of the token.
    Type: Application
    Filed: May 30, 2018
    Publication date: December 6, 2018
    Applicant: Siemens Healthcare GmbH
    Inventors: Matthias Gebhardt, Stephan Nufer
  • Patent number: 10101415
    Abstract: A method for operating a magnetic resonance apparatus by a safety unit, taking into account persons fitted with an implant, a safety unit, a safety system, a magnetic resonance apparatus, and a computer program product are provided. The magnetic resonance apparatus includes a first part and a second part. The first part is operated separately from the second part and includes the safety unit. During an examination of a person fitted with an implant, the safety unit checks that the magnetic resonance apparatus, in a restricted operating mode, is complying with implant-conformant limit values.
    Type: Grant
    Filed: April 15, 2017
    Date of Patent: October 16, 2018
    Assignee: Siemens Healthcare GmbH
    Inventors: Wolfgang Bielmeier, Gerhard Brinker, Nikolaus Demharter, Bernd Erbe, Matthias Gebhardt, Jürgen Nistler, Dominik Paul, Carsten Prinz, Gudrun Ruyters, Stephan Stöcker, Markus Vester, Swen Campagna
  • Publication number: 20180081015
    Abstract: In a method and magnetic resonance (MR) apparatus for avoidance of artifacts in the acquisition of MR data, first and second undersampled datasets are recorded, the measurement data of each dataset being selected such that artifacts in the first dataset exhibit a phase other than in the second dataset, and the measurement data in the first and second datasets, even when combined, correspond to undersampled dataset. The recorded, undersampled datasets are supplemented with the use of a supplementary kernel of a parallel acquisition method to form supplemented datasets from which a combined, artifact-free dataset is produced. Measurement time is thereby reduced overall compared with customary PAT averaging and compared with recording without the use of a parallel acquisition method.
    Type: Application
    Filed: September 8, 2017
    Publication date: March 22, 2018
    Applicant: Siemens Healthcare GmbH
    Inventors: Matthias Gebhardt, Mario Zeller
  • Publication number: 20180074138
    Abstract: A method for monitoring a temporal change in a magnetic field in a magnetic resonance device, as well as an evaluation unit, a magnetic resonance device, and a computer program product for performing the method are provided. The method provides that a position-dependent magnetic field distribution that is produced by the plurality of gradient coils is provided with a plurality of monitoring points. In addition, time-dependent gradient values of the plurality of gradient coils are ascertained. Based on position-dependent magnetic field distribution and the time-dependent gradient values, the temporal change in the magnetic field is ascertained. The temporal change in the magnetic field is monitored by comparing the temporal change in the magnetic field with at least one limit value.
    Type: Application
    Filed: September 9, 2017
    Publication date: March 15, 2018
    Inventors: Wolfgang Bielmeier, Gerhard Brinker, Swen Campagna, Nikolaus Demharter, Bernd Erbe, Matthias Gebhardt, Helmut Lenz, Jürgen Nistler, Dominik Paul, Carsten Prinz, Gudrun Ruyters, Stephan Stöcker, Markus Vester
  • Publication number: 20170328966
    Abstract: In a magnetic resonance apparatus and a method for operation thereof, at least one electrical operating value of at least one predetermined component of the apparatus is captured and, as a function of the at least one operating value, at least one coil operating value of a transmitting coil arrangement of the magnetic resonance apparatus is controlled for the purpose of limiting a B1 value.
    Type: Application
    Filed: May 10, 2017
    Publication date: November 16, 2017
    Applicant: Siemens Healthcare GmbH
    Inventors: Wolfgang Bielmeier, Gerhard Brinker, Swen Campagna, Bernd Erbe, Matthias Gebhardt, Juergen Nistler, Dominik Paul, Carsten Prinz, Gudrun Ruyters, Stephan Stoecker, Markus Vester
  • Publication number: 20170315195
    Abstract: In a magnetic resonance (MR) apparatus and an operating method therefor, a sequence with which the MR data are to be recorded is created in or provided to a control computer of the MR apparatus. A maximum RF output and a maximum gradient performance of the scanner magnetic resonance apparatus during the performance of the sequence are determined by simulating or analyzing the performance of the sequence in the control computer, and it is verified whether the maximum RF output and/or the maximum gradient performance violate predetermined limit values. Execution of the sequence to record the MR data is performed only if the verification showed that the limit values are not violated.
    Type: Application
    Filed: April 27, 2017
    Publication date: November 2, 2017
    Applicant: Siemens Healthcare GmbH
    Inventors: Wolfgang Bielmeier, Gerhard Brinker, Swen Campagna, Nikolaus Demharter, Bernd Erbe, Matthias Gebhardt, Juergen Nistler, Dominik Paul, Carsten Prinz, Gudrun Ruyters, Stephan Stoecker, Markus Vester