Patents by Inventor Stefan Popescu

Stefan Popescu 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
  • Publication number: 20210046315
    Abstract: Techniques are disclosed related to increasing prior limits imposed on MR gradient switching speed (dB/dt) without causing significant discomfort or severe pain perception to patients. The technique disclosed herein do so by modifying the pulsing gradient fields that are ordinarily available for MR imaging protocols. Doing so stimulates the peripheral nerves and thus enables a quick, reversible, and complete inhibition of action potential propagation through the stimulated region of tissue, referred to as a nerve conduction block.
    Type: Application
    Filed: August 16, 2019
    Publication date: February 18, 2021
    Applicants: Siemens Healthcare GmbH, The General Hospital Corporation
    Inventors: Stefan Popescu, Lawrence Wald, Bruce Rosen, Jason Stockmann
  • Patent number: 10871532
    Abstract: A local coil matrix and a method are provided for image acquisition with a magnetic resonance tomography unit. The local coil matrix includes a plurality of coil windings. In magnetic resonance imaging, a predetermined region of a patient arranged in the vicinity of the local coil with selectable differently-sized sensitivity ranges is acquired and/or excited. An image is reconstructed from the magnetic resonance signals acquired with the local coil matrix.
    Type: Grant
    Filed: March 25, 2019
    Date of Patent: December 22, 2020
    Assignee: Siemens Healthcare GmbH
    Inventor: Stefan Popescu
  • Publication number: 20200355764
    Abstract: A magnetic resonance tomography system can include a basic field magnet arrangement configured to generate a basic magnetic field (B0), and spatially separated measurement stations (M1, M2, M3, M4, M5, M6, N5, M6, Mp, Ms). The magnetic resonance tomography system can use the intended basic magnetic field (B0) collectively for the measurement stations.
    Type: Application
    Filed: May 8, 2020
    Publication date: November 12, 2020
    Applicant: Siemens Healthcare GmbH
    Inventor: Stefan Popescu
  • 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: 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: 10816618
    Abstract: A magnetic resonance (MR) body coil is provided with a supporting surface for support on an object to be examined and an outer side remote from the support side, wherein at least one light source is fastened to the outer side at a predefined position. A magnetic resonance system has at least one MR body coil and an image acquisition device for acquiring light, which may be radiated by the at least one light source of the at least one MR body coil. A method is used for operating a MR body coil, wherein at least one light source radiates light for positioning the MR body coil. A further method is used for positioning a MR body coil on an object to be examined, wherein at least one light source fastened to a MR body coil radiates light, the light is acquired by an image acquisition device, which includes at least one camera, and at least one position of the at least one light source is determined by the acquisition.
    Type: Grant
    Filed: May 24, 2018
    Date of Patent: October 27, 2020
    Assignee: Siemens Healthcare GmbH
    Inventor: Stefan Popescu
  • Patent number: 10809327
    Abstract: A connecting lead for a receiving antenna of a magnetic resonance tomograph, to a system made up of a magnetic resonance tomograph and to a receiving antenna is provided. The connecting lead includes a resonant contactless power coupler. The receiving antenna is magnetically resonantly coupled by the connecting lead to the magnetic resonance tomograph. The magnetic resonance tomograph includes an alternating current generator that may be connected to the connecting lead and is configured to supply the active amplifier element of the receiving antenna with energy.
    Type: Grant
    Filed: August 8, 2018
    Date of Patent: October 20, 2020
    Assignee: Siemens Healthcare GmbH
    Inventor: Stefan Popescu
  • 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: 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
  • Patent number: 10768257
    Abstract: In a method, control computer and magnetic resonance (MR) apparatus for generating MR recordings of an examination object, first magnetic MR data are acquired in a first recording region inside a homogeneity volume of the scanner of the MR apparatus, and second MR raw data are acquired in a second recording region outside the homogeneity volume. First image data are reconstructed on the basis of the first MR raw data and second image data are reconstructed on the basis of the second MR raw data. The first image data and the second image data are combined to form combination image data, which cover a region that extends in the first recording region and in the second recording region.
    Type: Grant
    Filed: April 15, 2019
    Date of Patent: September 8, 2020
    Assignee: Siemens Healthcare GmbH
    Inventor: Stefan Popescu
  • Patent number: 10746828
    Abstract: In a method and apparatus for generating image data (other than magnetic resonance (MR) data) in an examination chamber of an MR scanner, an image generating unit generates the image data, a first RF-shielding portion completely encloses the image generating unit except for at least one opening for exchanging image data with the surrounding environment, and a horn-shaped second RF shielding portion is arranged around the at least one opening and is electrically connected with the first RF shielding portion such that the at least one opening opens into the horn-shaped second RF shielding portion.
    Type: Grant
    Filed: August 10, 2018
    Date of Patent: August 18, 2020
    Assignee: Siemens Healthcare GmbH
    Inventor: Stefan Popescu
  • Publication number: 20200209330
    Abstract: The present disclosure relates to a magnetic resonance (MR) scanner and magnetic resonance imaging (MRI) system. The MR scanner includes a superconducting magnet, a superconducting quantum processor, a first cooling system surrounding the superconducting magnet, and a second cooling system surrounding the superconducting quantum processor. The second cooling system is embedded in the first cooling system.
    Type: Application
    Filed: December 4, 2019
    Publication date: July 2, 2020
    Inventor: Stefan Popescu
  • Publication number: 20200167975
    Abstract: The present disclosure is related to methods and systems for image reconstruction including accelerated forward transformation with an Artificial Neural Network (ANN).
    Type: Application
    Filed: November 26, 2019
    Publication date: May 28, 2020
    Inventor: Stefan Popescu
  • Patent number: 10656226
    Abstract: A magnetic resonance (MR) apparatus for implementing an MR examination of a patient, has an MR scanner with a gradient coil arrangement and a music network having at least two communicating instrument devices, synchronized by synchronization signals sent via the music network, so as to generate a music piece that is to be emitted as an output to the patient. One of the instrument devices is the magnetic resonance scanner that, as an interface to the music network, has a synchronization unit designed to derive the synchronization signals for the music network from sequence control signals received from the control computer of the magnetic resonance scanner, at least for the gradient coil arrangement.
    Type: Grant
    Filed: May 18, 2018
    Date of Patent: May 19, 2020
    Assignee: Siemens Healthcare GmbH
    Inventors: Daniel Rinck, Stefan Popescu
  • Patent number: 10578700
    Abstract: A magnetic resonance (MR) image is created by executing an imaging sequence with an MR apparatus, wherein data in k-space are acquired using multiple receiving antennae, and reconstruction of all image points that correspond to all k-space points belonging to the imaging sequence takes place using a sensitivity profile of the receiving antennae in order to also take account of data at k-space points at positions at which no data were acquired. Data acquired at a number of positions of particular k-space points, the number of the particular k-space points being smaller than the number of all k-space points belonging to the imaging sequence. The aperture of each of the receiving antennae is configured such that, for acquisition of data at a respective k-space point, the spectral main lobe of the respective receiving antenna also extends over k-space points adjacent to the respective k-space point.
    Type: Grant
    Filed: June 29, 2017
    Date of Patent: March 3, 2020
    Assignee: Siemens Healthcare GmbH
    Inventor: Stefan Popescu
  • Patent number: 10580212
    Abstract: In a method and system for the multisensory representation of an object, multidimensional digital model data of the object are provided to a processor. An actual three-dimensional object model is produced on the basis of at least part of the multidimensional digital model data of the object. The position of the object is recorded subsequently. At least part of the multidimensional digital model data of the object is displayed by an AR display device depending on the position of the object model.
    Type: Grant
    Filed: April 12, 2017
    Date of Patent: March 3, 2020
    Assignee: Siemens Healthcare GmbH
    Inventor: Stefan Popescu
  • Publication number: 20200043581
    Abstract: A method includes receiving a first patient model of the patient, the first patient model including a first image dataset of the patient, the first image dataset being coordinated relative to a first coordinate system; receiving a second image dataset of the patient, the second image dataset being based on a medical imaging apparatus and being coordinated relative to a second coordinate system; determining a transformation function to transfer the second coordinate system into the first coordinate system; determining a transformed second image dataset based on the second image dataset and the transformation function; and providing a second patient model of the patient, the second patient model including the modified first image dataset.
    Type: Application
    Filed: October 15, 2019
    Publication date: February 6, 2020
    Applicant: Siemens Healthcare GmbH
    Inventor: Stefan Popescu
  • Publication number: 20200041589
    Abstract: A magnetic resonance device comprising a gradient coil assembly having gradient coils is described. The gradient coils are supported by at least one cylindrical coil carrier for generating gradient fields. As part of the gradient coil assembly, at least one vibration sensor is provided for measuring vibrations of the gradient coil assembly at least in a radial direction of oscillation.
    Type: Application
    Filed: August 1, 2019
    Publication date: February 6, 2020
    Applicant: Siemens Healthcare GmbH
    Inventors: Peter Dietz, Annette Stein, Andreas Krug, Stefan Popescu