Patents by Inventor Markus Vester

Markus Vester 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).

  • 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: 10928477
    Abstract: In a method and a magnetic resonance apparatus for generating movement information relating to an examination region of a patient, a reception circuit is provided that receives MR signals within a reception frequency range. An electromagnetic signal is generated that has a first frequency that is outside the reception frequency range of the reception circuit, and that interacts with at least some of the examination region, so the electromagnetic signal undergoes a modification. A modulated signal based on the modified first signal is generated that has a frequency within the reception frequency range. The modulated signal is transmitted to the reception circuit, and is forwarded to a computer, wherein movement information is determined based on the modulated signal.
    Type: Grant
    Filed: August 11, 2017
    Date of Patent: February 23, 2021
    Assignee: Siemens Healthcare GmbH
    Inventors: Peter Speier, Markus Vester, Karsten Wicklow
  • Publication number: 20210025952
    Abstract: A device for generating wideband signals in a local coil and a magnetic resonance tomography system with the device are provided. The device has a first analog-digital converter for digitizing a magnetic resonance signal, a signal conditioner, a pulse filter, and a transmit antenna. The signal conditioner is configured to increase a harmonic component in an output signal of the first analog-digital converter, and the pulse filter is configured to restrict an output signal of the signal conditioner to a predetermined frequency band before the output signal of the signal conditioner is emitted via the transmit antenna. The receiver is configured to receive and digitize the signal via a receive antenna, and regain a digital representation of the magnetic resonance signal by a signal processor.
    Type: Application
    Filed: July 24, 2020
    Publication date: January 28, 2021
    Inventors: Andreas Fackelmeier, Markus Vester
  • Publication number: 20200379066
    Abstract: Techniques are disclosed for a local coil and a magnetic resonance imaging system. The local coil includes a plurality of coil units that respectively receive magnetic resonance signals generated when magnetic resonance detection is performed on a detected object, and a signal processing unit configured to perform processing including signal preprocessing and quadrature modulation on the magnetic resonance signals received by the plurality of coil units to obtain signals to be transmitted. Contactless connectors are also disclosed, each being configured to couple the signals to be transmitted to a contactless connector at the MR system side.
    Type: Application
    Filed: May 29, 2020
    Publication date: December 3, 2020
    Applicant: Siemens Healthcare GmbH
    Inventors: JianMin Wang, Markus Vester
  • Publication number: 20200363489
    Abstract: A calibration method for calibrating a measuring element for determining an electric current flowing through a basic-field magnet of a magnetic resonance imaging system includes performing a measurement with the measuring element, and performing a frequency measurement in the magnetic field of the basic-field magnet with a frequency measuring unit. The measurement of the measuring element and the frequency measurement are corresponding to the same magnetic field of the basic-field magnet. The calibration method also includes calculating a calibration factor based on a deviation between the measurement with the measuring element and the frequency measurement, and calibrating the measuring element or the electric current in the basic-field magnet based on the calibration factor.
    Type: Application
    Filed: May 15, 2020
    Publication date: November 19, 2020
    Inventors: Adrian Bampton, Stephan Biber, Adam Paul Johnstone, Jürgen Nistler, Andreas Potthast, Markus Vester, Andre de Oliveira
  • Patent number: 10838025
    Abstract: A radio-frequency system for a magnetic resonance apparatus has a local coil, a body coil, and an impedance adjusting shield. The body coil is wirelessly power-coupled with the local coil such that the body coil serves as a transmitting coil for radio-frequency signals and the local coil serves as a receiving coil for magnetic resonance signals. The local coil is disposed in an internal cavity of the impedance adjusting shield. An impedance of the local coil is adjusted by the impedance adjusting shield so as to match the impedance of the local coil and the body coil. The impedance adjusting shield has a frequency modulation element that adjusts the resonance frequency of the local coil. The body coil couples power to the local coil, and the impedance adjusting shield effectively reduces energy transmission efficiency loss caused by reflection, thereby improving energy transmission efficiency.
    Type: Grant
    Filed: April 25, 2019
    Date of Patent: November 17, 2020
    Assignee: Siemens Healthcare GmbH
    Inventors: Yan Li Chen, Shu Du, Markus Vester, Jian Min Wang
  • Publication number: 20200355771
    Abstract: A basic field magnet arrangement for a magnetic resonance tomography system can include a plurality of basic field magnet segments spatially separated from one another, each being configured to generate an intended magnetic field having a defined segment main field direction. At least two basic magnet segments of the plurality of the basic field magnet segments are arranged relative to one another such that the respective segment main field directions of their intended magnetic fields extend at a deflection angle to one another such that the intended magnetic fields of the at least two basic field magnet segments produce an intended basic magnetic field. The intended basic magnetic field including a basic magnet main field direction can have a ring-shaped profile.
    Type: Application
    Filed: May 8, 2020
    Publication date: November 12, 2020
    Applicant: Siemens Healthcare GmbH
    Inventors: Stefan Popescu, 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: 10823793
    Abstract: A magnetic resonance scanner has a base, a C-arm mounted on the base, the C-arm having an inner surface curved in a C-shape, the C-shape defining a plane, a magnet mounted on the inner curved surface of the C-arm, the magnet generating a basic magnetic field for magnetic resonance imaging, and a drive mechanism mechanically connected to the magnet. The drive mechanism rotates the magnet around an axis that is orthogonal to the plane so as to selectively position the magnet in at least two magnet positions that are respectively above and beneath a patient, who is situated in the C-arm along or parallel to the axis.
    Type: Grant
    Filed: March 27, 2019
    Date of Patent: November 3, 2020
    Assignees: Siemens Healthcare GmbH, Yale University
    Inventors: Stefan Popescu, Markus Vester, Peter Speier, Edgar Müller, Robert Todd Constable, Gigi Galiana
  • 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
  • Publication number: 20200326395
    Abstract: A single-stage radio frequency amplifier is provided with a signal amplification stage for a magnetic resonance tomography scanner, for example as a low-noise preamplifier in a local coil. The radio frequency amplifier includes a signal input, a signal amplifier, a signal output of the signal amplifier and a phase shifter. The phase shifter is in signal connection with the signal output and the signal input of the signal amplifier and is configured to couple a predetermined portion of an output signal of the signal amplifier with a predetermined phase shift into the signal input of the signal amplifier.
    Type: Application
    Filed: March 31, 2020
    Publication date: October 15, 2020
    Inventors: Klaus Huber, Markus Vester
  • Publication number: 20200309877
    Abstract: A magnet assembly for magnetic resonance imaging is used to generate the basic magnetic field with a strength needed to produce the steady state or equilibrium position of nuclei or nuclear spins in magnetic resonance imaging. This magnet, or a part thereof, is vibrated or tilted or otherwise periodically moved so as to change its position and thereby generate a time-varying gradient field, which is used to enter the acquired magnetic resonance signals as raw data into k-space.
    Type: Application
    Filed: March 27, 2019
    Publication date: October 1, 2020
    Applicants: Siemens Healthcare GmbH, Yale University
    Inventors: Markus Vester, Peter Speier, Stefan Popescu, Edgar Mueller, Robert Todd Constable, Gigi Galiana
  • Publication number: 20200309878
    Abstract: A magnetic resonance scanner has a base, a C-arm mounted on said base, the C-arm having an inner surface curved in a C-shape, the C-shape defining a plane, a magnet mounted on said inner curved surface of said C-arm, the magnet generating a basic magnetic field for magnetic resonance imaging, and a drive mechanism mechanically connected to the magnet. The drive mechanism rotates the magnet around an axis that is orthogonal to said plane so as to selectively position said magnet in at least two magnet positions that are respectively above and beneath a patient, who is situated in the C-arm along or parallel to the axis.
    Type: Application
    Filed: March 27, 2019
    Publication date: October 1, 2020
    Applicants: Siemens Healthcare GmbH, Yale University
    Inventors: Stefan Popescu, Markus Vester, Peter Speier, Edgar Müller, Robert Todd Constable, Gigi Galiana
  • Patent number: 10782370
    Abstract: System and methods are provided for a passive transmitting antenna for a magnetic resonance tomography system and to a system including a passive transmitting antenna and magnetic resonance tomography system and a method for operation. The passive transmitting antenna includes a tuning apparatus with a tuning element. The tuning apparatus is configured to perform a tuning of the passive transmitting antenna as a function of a relative position of the passive transmitting antenna in a patient tunnel of the magnetic resonance tomography system.
    Type: Grant
    Filed: June 28, 2018
    Date of Patent: September 22, 2020
    Assignee: Siemens Healthcare GmbH
    Inventors: Stephan Biber, Markus Vester
  • Publication number: 20200292645
    Abstract: The disclosure relates to a field camera and a method for measuring a magnetic field distribution using a magnetic resonance tomograph and the field camera. The field camera has a number of samples, which are distributed over a spatial volume to be measured, and a number of receive antennas. In an act of the method, a sensitivity matrix for the receive antennas, for each sample at each receive antenna, is captured using the magnetic resonance tomograph. In another act, antenna signals of the samples in a magnetic field to be measured are captured by the receive antennas, using the magnetic resonance tomograph. Finally, magnetic resonance signals of the individual samples are determined from the antenna signals as a function of the sensitivity matrix, using a controller. In a further act, the magnetic field strength at the location of the samples may be determined from the magnetic resonance signals.
    Type: Application
    Filed: February 25, 2020
    Publication date: September 17, 2020
    Inventors: Stephan Kannengiesser, Robert Rehner, Stefan Popescu, Gudrun Ruyters, Markus Vester
  • Publication number: 20200249292
    Abstract: The invention relates to an MRI scanner and a method for operation of said MRI scanner. The MRI scanner has a first receiving antenna for receiving a magnetic resonance signal from a patient in a patient tunnel, a second receiving antenna for receiving a signal having the Larmor frequency of the magnetic resonance signal, and a receiver. The second receiving antenna is located outside of the patient tunnel or near an opening thereof. The receiver has a signal connection to the first receiving antenna and the second receiving antenna and is designed to suppress an interference signal by the second receiving antenna in the magnetic resonance signal received by the first receiving antenna.
    Type: Application
    Filed: October 2, 2018
    Publication date: August 6, 2020
    Inventors: Stephan Biber, Ian Edward Nichols, David James Sadler, David Grodzki, Markus Vester
  • Patent number: 10690736
    Abstract: A local coil for a magnetic resonance tomography system is provided. The local coil has a coil winding and a preamplifier connected electrically thereto. The coil winding has a plurality of coil segments that are coupled capacitively to one another.
    Type: Grant
    Filed: January 28, 2019
    Date of Patent: June 23, 2020
    Assignee: Siemens Healthcare GmbH
    Inventors: Helmut Greim, Robert Rehner, Markus Vester
  • Publication number: 20200191888
    Abstract: A magnetic resonance tomography unit and a method for operating the magnetic resonance tomography unit are provided. The magnetic resonance tomography unit includes a transmitter for generating excitation pulses with a wavelength lambda, an antenna for emitting the excitation pulses, a feed line, and a voltage sensor. The voltage sensor is arranged on the feed line at an effective distance corresponding to a multiple of half the wavelength lambda from a feed point on the antenna.
    Type: Application
    Filed: December 13, 2019
    Publication date: June 18, 2020
    Inventors: Georg Martschenko, Jürgen Nistler, Markus Vester, Christian Wünsch
  • Publication number: 20200166597
    Abstract: The disclosure relates to a medical image acquisition device with a pilot tone transmitter and a pilot tone receiver and to a method for operating the same. The pilot tone transmitter is configured to emit an electromagnetic radio frequency signal into a patient. The pilot tone receiver is configured to receive the radio frequency signal and to decode an item of information relating to a physiological process in the patient. The pilot tone transmitter has a modulator configured to modulate the electromagnetic radio frequency signal with a code and the pilot tone receiver is configured to select the modulated radio frequency signal using the encoding from a plurality of signals.
    Type: Application
    Filed: November 11, 2019
    Publication date: May 28, 2020
    Inventors: Peter Speier, Markus Vester
  • Patent number: 10663543
    Abstract: A device for recovering a temporal reference in a free-running magnetic resonance tomography (MRT) receive chain includes a time reference encoder and a time reference decoder. The time reference encoder is configured to generate a modulation signal as a function of a reference clock, where the modulation signal is configured for a correlation with a temporal resolution less than a maximum predetermined phase deviation and a maximum that may clearly be identified. The time reference decoder is configured to receive, via the first signal input, a receive signal as a function of the modulation signal, perform a correlation with a reference signal, and generate a signal as a function of a temporal reference of the modulation signal in the receive signal in relation to the reference signal.
    Type: Grant
    Filed: April 11, 2018
    Date of Patent: May 26, 2020
    Assignee: Siemens Healthcare GmbH
    Inventors: Stephan Biber, Jan Bollenbeck, Sven Heggen, Martin Nisznansky, Markus Vester