Patents by Inventor Peter Speier

Peter Speier 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: 10935615
    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: Grant
    Filed: March 27, 2019
    Date of Patent: March 2, 2021
    Assignees: Yale University, Siemens Healthcare GmbH
    Inventors: Markus Vester, Peter Speier, Stefan Popescu, Edgar Mueller, Robert Todd Constable, Gigi Galiana
  • 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
  • Patent number: 10866298
    Abstract: Systems and methods are provided for iterative reconstruction of a magnetic resonance image using Magnetic Resonance Fingerprinting (MRF). An image series is estimated according to the following three steps: a gradient step to improve data consistency, fingerprint matching, and a spatial regularization. Singular Value Decomposition (SVD) compression may be used along the time dimension to accelerate both the matching and the spatial regularization that operates in the compressed domain as well as to enforce low-rank regularization.
    Type: Grant
    Filed: July 25, 2018
    Date of Patent: December 15, 2020
    Assignee: Siemens Healthcare GmbH
    Inventors: Simon Arberet, Xiao Chen, Boris Mailhe, Mariappan S. Nadar, Peter Speier
  • Publication number: 20200379067
    Abstract: Storage medium, magnetic resonance apparatus and method for obtaining a magnetic resonance dataset including a pilot signal uses a magnetic resonance sequence. The pilot signal is generated at a first frequency range, and a magnetic resonance signal is generated at a second frequency range. The pilot signal and the magnetic resonance signal are acquired simultaneously. At least one parameter, in particular the phase and/or the frequency range, of the pilot signal is changed during the execution of the magnetic resonance sequence at least once.
    Type: Application
    Filed: May 26, 2020
    Publication date: December 3, 2020
    Inventor: Peter Speier
  • Publication number: 20200367765
    Abstract: A method for measuring blood flow is provided. A modulated magnetic field is generated by a generator coil. Response signals of the modulated magnetic field are record from an object with an RF reception system. The response signals are measured by at least two RF antennae of the RF reception system. A flow component of the recorded response signals is separated from signal components resulting from movements of the object.
    Type: Application
    Filed: May 22, 2020
    Publication date: November 26, 2020
    Inventors: Mario Bacher, 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: 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: 10823804
    Abstract: In a method and apparatus for capturing magnetic resonance data from an imaging volume of a patient in which liquid, such as particular blood, is moving, a bSSFP magnetic resonance sequence is executed in which nuclear spins located within the imaging volume are cyclically excited by radiation of a radio-frequency pulse, using a magnetic resonance scanner. A ramp pulse is used as the radio-frequency pulse, which establishes a flip angle of the spins that is spatially variable within the imaging volume. The flip angle is designed to be lower on a side or the imaging volume from which the liquid flows into the imaging volume than on the side at which the liquid flows out, and the flip angle increases monotonically.
    Type: Grant
    Filed: July 13, 2018
    Date of Patent: November 3, 2020
    Assignee: Siemens Healthcare GmbH
    Inventors: Peter Schmitt, Peter Speier
  • Patent number: 10813569
    Abstract: A method for reconstructing dynamic image data is described. In the method, raw data is acquired in a time-dependent manner from an examination region, wherein at least some of the raw data is assigned various values of movement parameters. First time-dependent image data based on acquired raw data is reconstructed. Furthermore, deformation fields based on the first image data are determined as a function of at least two time-dependent movement parameters. Based on the deformation fields, the raw data and the first image data, corrected image data is then generated. Furthermore, a reconstruction apparatus is described. Moreover, a magnetic resonance imaging system is described.
    Type: Grant
    Filed: May 14, 2018
    Date of Patent: October 27, 2020
    Assignee: Siemens Healthcare GmbH
    Inventors: Christoph Forman, Peter Speier, Marcel Dominik Nickel
  • 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
  • Publication number: 20200292648
    Abstract: Techniques are described for controlling a magnetic resonance imaging system to facilitate an improvement in Simultaneous Multislice Imaging, especially concerning a compensation of eddy currents. This is achieved by simultaneously measuring at least two slices by the magnetic resonance imaging system while applying a pulse sequence. In the course of the pulse sequence for measuring k-space lines, a set of in-plane encoding signals (that are typically gradients) are applied with a set of Hadamard encoding signals in an interleaved scheme.
    Type: Application
    Filed: March 11, 2020
    Publication date: September 17, 2020
    Applicant: Siemens Healthcare GmbH
    Inventors: Peter Speier, Daniel Staeb
  • Publication number: 20200275858
    Abstract: In a method for controlling a magnetic resonance imaging system as part of functional magnetic resonance imaging, a main magnetic field B0 is provided having a field strength of at most 1.4 tesla at a main field magnet system (4) of the magnetic resonance imaging system (1); and a measurement is performed as part of functional magnetic resonance imaging, wherein a measurement sequence (MS) is applied that has a longer echo time TE (e.g. longer than 100 ms).
    Type: Application
    Filed: February 28, 2020
    Publication date: September 3, 2020
    Applicant: Siemens Healthcare GmbH
    Inventors: Edgar Mueller, Andreas Greiser, Peter Speier
  • Patent number: 10677872
    Abstract: In a magnetic resonance method and apparatus for time-of-flight vascular imaging, a magnetic field is applied to an imaging volume and an inflow volume, from which liquid enters into the imaging volume, of an examination person. The imaging volume is excited by an RF pulse, which fulfills a magnetization transfer function and a fat saturation function, while the magnetic field is being applied. The RF pulse has a frequency distribution whose frequencies are higher than the center frequency of water in the imaging volume, and that includes the fat frequency in the imaging volume. The magnetic field has a field distribution with an apex with essentially no spatial gradient in the imaging volume and having a higher spatial gradient in the inflow volume, so that the center frequency of water in the inflow volume is shifted in the direction of lower frequencies and is no longer affected by the RF pulse.
    Type: Grant
    Filed: May 21, 2018
    Date of Patent: June 9, 2020
    Assignee: Siemens Healthcare GmbH
    Inventor: Peter Speier
  • 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
  • Publication number: 20200103480
    Abstract: In a parameter value determination method, parameter values are determined based on at least two previously determined most similar comparison signal curves. As a result, the parameters for determining can be determined with a resolution greater than the resolution, underlying the comparison signal curves, of the values of the parameters to be determined. Advantageously, the determination of the parameter values are not limited to the values of the comparison signal curves, in other words, are not limited to the lattice/grid of the dictionary.
    Type: Application
    Filed: September 26, 2019
    Publication date: April 2, 2020
    Applicant: Siemens Healthcare GmbH
    Inventors: Mathias Nittka, Gregor Koerzdoerfer, Peter Speier, Jens Wetzl
  • Publication number: 20200103481
    Abstract: A magnetic resonance fingerprinting (MRF) method for determining parameter values in pixels of an examination object can use a magnetic resonance system with, for example, a constant magnetic field strength (e.g. of less than 1.5 tesla or a constant magnetic field strength of less than 0.5 tesla). The MRF method can be adapted for conditions that prevail with such low-field magnetic resonance systems, thus enabling the parameter values to be advantageously determined efficiently while simultaneously maintaining a high degree of quality.
    Type: Application
    Filed: September 26, 2019
    Publication date: April 2, 2020
    Applicant: Siemens Healthcare GmbH
    Inventors: Gregor Koerzdoerfer, Mathias Nittka, Peter Speier
  • Patent number: 10564244
    Abstract: A method is provided for ascertaining at least one item of movement information describing a sought movement as a partial movement of an overall movement in an at least partially moved examination region. In the method, at least one excitation signal having a first frequency band is output and receiving signals generated by the excitation signal are recorded with a receiving coil arrangement, (e.g., a receiving coil arrangement of a magnetic resonance device), having a plurality of receiving channels. The coils of the receiving coil arrangement are designed to record a receiving frequency band including the first frequency band, wherein for ascertaining the movement information the complex receiving signals of the receiving channels are combined at one instant according to a combination specification ascertained over a period by an analysis of the receiving signals that identifies at least one component of a movement that contributes to the sought movement.
    Type: Grant
    Filed: December 2, 2016
    Date of Patent: February 18, 2020
    Assignee: Siemens Healthcare GmbH
    Inventors: Matthias Fenchel, Peter Speier
  • Publication number: 20200041597
    Abstract: Machine training a network for and use of the machine-trained network are provided for tissue parameter estimation for a magnetic scanner using magnetic resonance fingerprinting. The machine-trained network is trained to both reconstruct a fingerprint image or fingerprint and to estimate values for multiple tissue parameters in magnetic resonance fingerprinting. The reconstruction of the fingerprint image or fingerprint may reduce noise, such as aliasing, allowing for more accurate estimation of the values of the multiple tissue parameters from the under sampled magnetic resonance fingerprinting information.
    Type: Application
    Filed: January 3, 2019
    Publication date: February 6, 2020
    Inventors: Guillaume Daval Frerot, Xiao Chen, Mariappan S. Nadar, Peter Speier, Mathias Nittka, Boris Mailhe, Simon Arberet
  • Publication number: 20200042873
    Abstract: For machine training and application of a trained complex-valued machine learning model, an activation function of the machine learning model, such as a neural network, includes a learnable parameter that is complex or defined in a complex domain with two dimensions, such as real and imaginary or magnitude and phase dimensions. The complex learnable parameter is trained for any of various applications, such as MR fingerprinting, other medical imaging, or non-medical uses.
    Type: Application
    Filed: April 25, 2019
    Publication date: February 6, 2020
    Inventors: Guillaume Daval Frerot, Xiao Chen, Simon Arberet, Boris Mailhe, Mariappan S. Nadar, Peter Speier, Mathias Nittka