Determine Fluid Flow Rate Patents (Class 324/306)
  • Patent number: 10663553
    Abstract: Systems, methods, and devices for intra-scan motion correction to compensate not only from one line or acquisition step to the next, but also within each acquisition step or line in k-space. The systems, methods, and devices for intra-scan motion correction can comprise updating geometry parameters, phase, read, and/or other encoding gradients, applying a correction gradient block, and/or correcting residual errors in orientation, pose, and/or gradient/phase.
    Type: Grant
    Filed: February 9, 2017
    Date of Patent: May 26, 2020
    Assignee: Kineticor, Inc.
    Inventors: Thomas Michael Ernst, Oliver Speck
  • Patent number: 10663548
    Abstract: A method for contrast agent enhanced magnetic resonance imaging (MRI) of a target sample, comprising generating a magnetic field shift in a polarizing magnetic field during a relaxation portion of an MRI pulse sequence and thereafter acquiring an MR image.
    Type: Grant
    Filed: May 27, 2016
    Date of Patent: May 26, 2020
    Assignee: THE UNIVERSITY OF WESTERN ONTARIO
    Inventors: Jamu Alford, Blaine Chronik, Timothy Scholl
  • Patent number: 10660541
    Abstract: The systems, methods, and devices described herein generally relate to achieving accurate and robust motion correction by detecting and accounting for false movements in motion correction systems used in conjunction with medical imaging and/or therapeutic systems. In other words, in some embodiments of the systems, methods, and devices described herein can be configured to detect false movements for motion correction during a medical imaging scan and/or therapeutic procedure, and thereby ensure that such false movements are not accounted for in the motion correction process. Upon detection of false movements, the imaging or therapeutic system can be configured to transiently suppress and/or subsequently repeat acquisitions.
    Type: Grant
    Filed: March 13, 2018
    Date of Patent: May 26, 2020
    Assignees: The University of Hawai'i, The Queen's Medical Center
    Inventors: Thomas Michael Ernst, Brian Keating, Aditya Singh, Maxim Zaitsev, Michael Herbst
  • Patent number: 10641856
    Abstract: In a method and magnetic resonance (MR) apparatus for different degrees of excitation of two different nuclear spin types with Larmor frequencies that are shifted relative to one another during recording of MR data by execution of an MR sequence, an excitation pulse sequence with at least two consecutive excitation pulses with defined time intervals for the exclusive excitation of the first spin type, and an additional pulse sequence with at least one additional pulse that acts at least on the second spin type, are used. A total pulse sequence formed by superimposition of the two pulse sequences is emitted within an excitation period of the MR sequence.
    Type: Grant
    Filed: February 8, 2018
    Date of Patent: May 5, 2020
    Assignee: Siemens Healthcare GmbH
    Inventors: Markus Klarhoefer, Thorsten Feiweier
  • Patent number: 10639415
    Abstract: Disclosed herein are a medical imaging apparatus including a scanner configured to scan an object, an image generator configured to generate a monitoring image to monitor variations in brightness of a region of interest (ROI) of the object, a controller configured to determine a peak of brightness in the monitoring image, and a user interface configured to display the monitoring image and an indicator of the determined peak, and a method of controlling the same. According to the medical imaging apparatus and the method of controlling the same, over-injection of a contrast agent into the object may be prevented while a medical image is acquired, and an image may be obtained when the contrast agent is in an optimum state in consideration of various environmental factors. Accordingly, lesions and diseases may be more accurately determined and interpreted by using the medical image.
    Type: Grant
    Filed: June 25, 2015
    Date of Patent: May 5, 2020
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventor: Jong Hyon Yi
  • Patent number: 10613171
    Abstract: Embodiments can provide a method for multi-banded RF-pulse enhanced magnetization imaging, the method comprising determining, by a processor, a frequency offset against a central frequency by specifying an offset frequency for one or more RF coils close to a frequency peak of mobile water; and simultaneously applying, by one or more RF coils, one or more bands of Gaussian RF pulses around the central frequency to a patient from a medical imaging device; wherein the one or more bands of Gaussian RF pulses are symmetrically applied having a distance from the central frequency equal to the frequency offset.
    Type: Grant
    Filed: June 15, 2017
    Date of Patent: April 7, 2020
    Assignees: Siemens Healthcare GmbH, Regents of the University of Minnesota
    Inventors: Xiufeng Li, Gregory J. Metzger, Kamil Ugurbil, Dingxin Wang
  • Patent number: 10605883
    Abstract: Described here are systems and methods for correcting magnetic resonance data for off-resonance effects arising from the use of a multi-echo echo planar imaging (“EPI”) pulse sequence. Reference data are acquired, from which phase maps are computed in a distorted coordinate space associated with geometric distortions associated with the multi-echo EPI acquisition. Images reconstructed from the magnetic resonance data are demodulated using the distorted phase maps to produce distortion free images of the subject. Advantageously, the systems and methods can be used to reconstruct distortion free images from magnetic resonance data that is otherwise prone to image distortions from off-resonance errors, including data acquired from hyperpolarized nuclear spin species such as hyperpolarized carbon-13.
    Type: Grant
    Filed: April 24, 2017
    Date of Patent: March 31, 2020
    Assignee: Sunnybrook Research Institute
    Inventors: Benjamin J. Geraghty, Charles H. Cunningham
  • Patent number: 10588511
    Abstract: A retrospective reconstruction method uses cardiac self-gating for patients with severe arrhythmias. Self-gated myocardial systolic and diastolic motion is determined from low-spatial and high-temporal resolution images and then the MRI-dataset is retrospectively reconstructed to obtain high quality images. The method uses undersampled image reconstruction to obtain the low-spatial and high-temporal resolution images, including those of different beat morphologies. Processing of these images is utilized to generate a cardiac phase signal. This signal allows for arrhythmia detection and cardiac phase sorting. The cardiac phase signal allows for detection of end-systolic and diastolic events which allows for improved sampling efficiency. In the case of frequent and severe arrhythmia, the method utilizes data from the normal and interrupted beats to improve sampling and image quality.
    Type: Grant
    Filed: April 24, 2015
    Date of Patent: March 17, 2020
    Assignee: The Trustees of the University of Pennsylvania
    Inventors: Francisco Contijoch, Walter R. T. Witschey, Robert C. Gorman, Yuchi Han, Joseph H. Gorman, III
  • Patent number: 10591563
    Abstract: A magnetic resonance imaging apparatus according to the present embodiment includes sequence control circuitry and processing circuitry. The sequence control circuitry controls execution of a pulse sequence which includes a first segment and a second segment being provided prior to the first segment. The first segment is where signal acquisition is performed. The second segment is where longitudinal magnetization and transverse magnetization are reduced by applying a plurality of RF magnetic field pulses while changing a magnitude and/or a phase thereof and a plurality of spoiler gradient field pulses.
    Type: Grant
    Filed: October 20, 2017
    Date of Patent: March 17, 2020
    Assignee: Canon Medical Systems Corporation
    Inventors: Daiki Tamada, Takashi Watanabe
  • Patent number: 10564245
    Abstract: According to one embodiment, an RF coil storage device stores an RF coil device which receives a magnetic resonance signal from an object with a coil element in magnetic resonance imaging. This RF coil storage device includes a storage rack on which the RF coil device is placed, and processing circuitry configured to acquire an index signal which is used for determining presence/absence of a failure, from the RF coil device placed on the storage rack.
    Type: Grant
    Filed: July 15, 2015
    Date of Patent: February 18, 2020
    Assignee: Canon Medical Systems Corporation
    Inventor: Mitsuo Takagi
  • Patent number: 10557910
    Abstract: An MRI apparatus includes a processing circuitry that executes a pulse sequence by which a data acquiring process is repeatedly performed multiple times where data is acquired every time each of waiting periods has elapsed since a tag pulse used for labeling a fluid flowing into an image taking region of a patient is applied, that acquires, at at least one time among the multiple times, data corresponding to one region by using a three-dimensional sequence, out of three-dimensional data acquired while being divided into regions, during each of the data acquiring processes corresponding to a first waiting period among the waiting periods, and that acquires data allocated to the one time by using a two-dimensional sequence, out of a slice of two-dimensional data corresponding to the entire three-dimensional data, during each of the data acquiring processes corresponding to a second waiting period different from the first waiting period.
    Type: Grant
    Filed: October 10, 2016
    Date of Patent: February 11, 2020
    Assignee: Canon Medical Systems Corporation
    Inventor: Kazuhiro Sueoka
  • Patent number: 10557730
    Abstract: A method of characterizing a fluid flow by an alternating magnetic field flow meter, comprising determining a flow rate of a fluid flowing through a conduit by generating a first magnetic field to move a magnetic token along a direction of a flow path of a fluid flowing through a conduit, detecting a first electrical signal based on the movement of the magnetic token, generating a second magnetic field to move the magnetic token opposite to the direction of the flow path, detecting a second electrical signal based on the movement of the magnetic token, and determining a conductivity of the fluid flowing through the conduit by generating a current along the flow path and detecting a third electrical signal based on the current generated along the flow path, and determining a conductivity measurement of the fluid flow based on the detected third electrical signal.
    Type: Grant
    Filed: June 20, 2019
    Date of Patent: February 11, 2020
    Assignee: Saudi Arabian Oil Company
    Inventors: Fouad M. Alkhabbaz, Maatoug Al-Maatoug
  • Patent number: 10551455
    Abstract: Magnetic resonance imaging (MRI) systems and methods using adiabatic tip-down and matched adiabatic flip-back pulses are disclosed. According to an aspect, a system includes a signal generator configured to generate a pulse sequence for on-resonance magnetization transfer preparation. The pulse sequence includes an adiabatic tip-down pulse and a matched adiabatic flip-back pulse for separating spins in a mobile spin pool from spins in a bound spin pool of an anatomical region of interest for imaging. The system includes radio frequency (RF) coils configured to transmit RF pulses in response to the pulse sequence and to acquire RF data in response to transmission of the RF pulses. Further, the system includes a processing system configured to process the RF data to provide a display image indicating different tissue types with discrimination.
    Type: Grant
    Filed: May 4, 2016
    Date of Patent: February 4, 2020
    Assignees: Duke University, Siemens Healthcare GmbH
    Inventors: David Wendell, Wolfgang Rehwald, Enn-Ling Chen, Raymond Kim
  • Patent number: 10552955
    Abstract: The present invention provides novel methods of accurately and efficiently reconstructing parameter maps in MRI data. In certain embodiments, the methods have reduced data acquisition time or improved spatial resolution when compared to methods standard in the art. In other embodiments, the methods have reduced acquisition and reconstruction time when compared to other acceleration methods in the art in parametric mapping. In other embodiments, the methods are less susceptible to influence of eddy currents when compared to other acceleration methods in the art in parametric mapping.
    Type: Grant
    Filed: April 4, 2018
    Date of Patent: February 4, 2020
    Assignee: Yale University
    Inventors: Chenxi Hu, Dana Peters
  • Patent number: 10551465
    Abstract: In a magnetic resonance imaging apparatus and a method for generating magnetic resonance image data of a field of view of an examination object, magnetic resonance raw data are acquired by preferably different transverse magnetizations being excited in at least one sub-volume of a navigator volume and at least one sub-volume of an image volume, and are used for position determination and for imaging. These preferably different transverse magnetizations are simultaneously present in at least one period of the scan.
    Type: Grant
    Filed: November 18, 2016
    Date of Patent: February 4, 2020
    Assignee: Siemens Healthcare GmbH
    Inventors: Thomas Beck, Thorsten Feiweier
  • Patent number: 10539642
    Abstract: It is an object of the invention to improve MRI based treatment, especially MRI based radiotherapy. This object is achieved by a method for calibrating a magnetic resonance imaging (MRI) phantom having an expected geometry and comprising at least one MRI detectable part with a position within the geometry which is known with a geometric inaccuracy. The method comprises the following steps: step 1: placing the phantom at a predetermined location in a magnetic resonance system such that the MRI detectable part is within a symmetry plane of a gradient system of the magnetic resonance imaging system and; step 2: acquiring an MRI image of the MRI detectable part of the phantom by means of a first sequence, wherein the MRI image comprises multiple slices; step 3: determining the geometric inaccuracy of the MRI detectable part of the MRI phantom based on the position and the representation of the part in the MRI image.
    Type: Grant
    Filed: September 6, 2016
    Date of Patent: January 21, 2020
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: Panu Tapani Vesanen, Jukka Ilmari Tanttu
  • Patent number: 10502603
    Abstract: A method for operating a nuclear magnetic flowmeter for determining the flow of a multi-phase medium flowing through a measuring tube that is suitable for media exhibiting “phase slip” with which the characterization of the gaseous phase is simplified, is achieved by a pulse spoiling the magnetization at least in the direction of the magnetic field or a pulse sequence spoiling the magnetization in the direction of the magnetic field being emitted by a coil-shaped antenna, particularly in combination with dephasing gradients, and then, after a waiting time tW, a nuclear magnetic measurement is carried out in that the medium is excited with excitation pulses by the coil-shaped antenna and the measuring signals generated by the excitation in the medium are detected.
    Type: Grant
    Filed: November 24, 2015
    Date of Patent: December 10, 2019
    Assignee: KROHNE AG
    Inventors: Rutger Reinout Tromp, Marco Leendert Zoeteweij
  • Patent number: 10495710
    Abstract: The embodiments disclosed herein relate to a method for generating time-resolved images of an examination object, which executes a cyclical movement, and to a magnetic resonance device, and a computer program product herefor. According to a first aspect, at least one spatial magnetization pattern with spatial magnetization differences is generated during a magnetization of the examination object. Furthermore, magnetic resonance signals of the examination object are acquired after generating the spatial magnetization pattern throughout at least one cycle of the cyclical movement. At least one k-space is undersampled here during the acquisition of the magnetic resonance signals. Time-resolved images are generated based on the acquired magnetic resonance signals.
    Type: Grant
    Filed: March 31, 2016
    Date of Patent: December 3, 2019
    Assignee: Siemens Aktiengesellschaft
    Inventors: Christoph Forman, Andreas Greiser
  • Patent number: 10473501
    Abstract: A multiphase flowmeter for detection of fluid flow by monitoring of vortex frequency or perturbation time of flight. The flowmeter includes a bluff body to facilitate formation of vortices during a consistent phase of a flowing fluid. Thus, monitoring frequency of the vortices may be employed to ascertain flowrate. Further, the bluff body may also facilitate formation of perturbations during transitioning phase of the fluid and include perturbation sensors at multiple known locations along the flow-path. Thus, analysis of perturbation detection times at the different locations may be used to ascertain flowrate even in the absence of vortices.
    Type: Grant
    Filed: November 3, 2017
    Date of Patent: November 12, 2019
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Andrew Parry, Yann Dufour
  • Patent number: 10473742
    Abstract: A magnetic resonance imaging apparatus includes a radio frequency (RF) controller configured to, during a repetition time (TR) period among TR periods, apply at least one RF pulse corresponding to a first slice to an object, and apply a navigator RF pulse corresponding to a second slice adjacent to the first slice to the object, a data obtainer configured to, during the TR period, obtain first k-space data corresponding to the applied at least one RF pulse, and obtain second k-space data corresponding to the applied navigator RF pulse, and an image processor configured to generate navigator images, based on pieces of second k-space data that are obtained during the TR periods, the pieces comprising the second k-space obtained during the TR period, correct the first k-space data, based on the navigator images, and generate a magnetic resonance image of the first slice, based on the corrected first k-space data.
    Type: Grant
    Filed: February 14, 2017
    Date of Patent: November 12, 2019
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Joon-sung Choi, Jin-young Hwang
  • Patent number: 10466086
    Abstract: A method for operating a nuclear-magnetic flowmeter in which, when determining a velocity of the medium through a measuring tube, the dependency on properties or the state of a medium is at least reduced. The method exciting a first volume of the magnetized medium flowing at a first velocity within a first measuring section to nuclear-magnetic resonances and a first signal sequence is formed characterizing the nuclear-magnetic resonances of the medium in the first volume, and then, exciting a second volume of the magnetized medium flowing at a second velocity within the first measuring section is excited to nuclear-magnetic resonances and a second signal sequence is formed characterizing the nuclear-magnetic resonances of the medium in the second volume. A quotient sequence is determined from each of the first and second signal sequences, and the first velocity and/or the second velocity is/are determined using the quotient sequence.
    Type: Grant
    Filed: May 31, 2017
    Date of Patent: November 5, 2019
    Assignee: KROHNE AG
    Inventors: Cornelis Johannes Hogendoorn, Rutger Reinout Tromp, Lucas Matias Ceferino Cerioni, Marco Leendert Zoeteweij, Olaf Jean Paul Bousché
  • Patent number: 10451696
    Abstract: An magnetic resonance imaging (MRI) apparatus and a method of obtaining a magnetic resonance (MR) image are provided. The MRI apparatus includes a processor that obtains k-space data including information on a high frequency region and a low frequency region, and corresponding to a first echo time within a single repetition time (TR), obtains second k-space data including information on at least a part of the low frequency region and corresponding to a second echo time within the single TR, and generating a plurality of reconstructed images having different contrasts based on the first k-space data and the second k-space data.
    Type: Grant
    Filed: August 31, 2017
    Date of Patent: October 22, 2019
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventor: Hyun-sang Suh
  • Patent number: 10444170
    Abstract: System and method for analyzing changes in a fluid flowing through a conduit, including defining at least one coordinate within said conduit, said conduit having a first plurality of slices, receiving at least one known value for at least one property of the fluid, measuring said fluid using magnetic resonance, determining at least one image from the measured fluid, the at least one image having a second plurality of slices for said at least one coordinate, determining a second set of values for said at least one property of said fluid, comparing the first set of values and second set of values for said at least one property to determine a difference value, checking deviation of the determined difference from a predetermined value for said fluid, and issuing an alert if the deviation is not substantially zero.
    Type: Grant
    Filed: July 3, 2016
    Date of Patent: October 15, 2019
    Assignee: ASPECT AI LTD.
    Inventors: Uri Rapoport, Boaz Shapira
  • Patent number: 10436866
    Abstract: Systems and methods for simultaneous multislice (“SMS”} magnetic resonance imaging (“MRI”}, in which a random blip gradient encoding scheme is utilized to impart a different phase to each of a plurality of different slice locations. Because of the random blip gradient encoding, the amount of the imparted phase is randomized for each phase encoding step in a Cartesian k-space trajectory. This data acquisition strategy leads to incoherent aliasing artifacts across the simultaneously excited slices. Images of the individual slices can be reconstructed using a compressed sensing framework.
    Type: Grant
    Filed: January 30, 2015
    Date of Patent: October 8, 2019
    Assignee: The General Hospital Corporation
    Inventors: Berkin Bilgic, Kawin Setsompop, Lawrence L. Wald
  • Patent number: 10429469
    Abstract: A system and method for sampling k-space is provided that substantially simplifies the demands placed on the clinician to select and balance the tradeoffs of a particular selected sampling methodology. In particular, the present invention provides particularly advantageous sampling methodologies that simplify the selection of a particular k-space sampling methodology and, furthermore, the tradeoffs within a particular sampling methodology.
    Type: Grant
    Filed: March 27, 2013
    Date of Patent: October 1, 2019
    Assignee: DIGNITY HEALTH
    Inventor: James G. Pipe
  • Patent number: 10413214
    Abstract: A magnetic resonance imaging apparatus includes a processor and a memory. The memory stores processor-executable instructions that, when executed by the processor, cause the processor to receive a breath holdable time of a subject and adjust a parameter value of an imaging parameter included in imaging condition for imaging of the subject, according to the breath holdable time.
    Type: Grant
    Filed: February 23, 2015
    Date of Patent: September 17, 2019
    Assignee: TOSHIBA MEDICAL SYSTEMS CORPORATION
    Inventors: Naoyuki Furudate, Sayo Syukuri
  • Patent number: 10413195
    Abstract: A method for determining an arteriovascular condition of a subject having an arterial blood flow is shown. The method involves determining a temporal progression of an instantaneous blood flow condition of the arterial blood flow as well as deriving a slew rate of the temporal progression during an increase of the temporal progression. In addition, an arteriovascular condition indicator device is shown, which comprises: an input for receiving an input signal representing an instantaneous arterial blood flow condition of a subject and a slew rate monitor connected to the input. A corresponding control device for providing an activation signal is also shown. The control device comprises a maximum detector connected to the slew rate monitor. A method for stimulation of arteriogenesis is also shown, wherein a temporal progression of an instantaneous blood flow condition is monitored, a slew rate of the temporal progression is derived, and the maximum of the slew rate is determined.
    Type: Grant
    Filed: July 27, 2015
    Date of Patent: September 17, 2019
    Inventors: Ivo Buschmann, Axel Pries, Ferdinand Lenoble
  • Patent number: 10405811
    Abstract: Method and apparatus are used to display a slice of tomographic image in a three-dimensional (3D) medical image, for the purpose of achieving better recognition of a vascular structure contained in the slice without degrading spatial resolution of the slice. An example method includes identifying a slice of interest in a 3D medical image representing an anatomical part including a blood vessel; and projecting along a slice axis direction orthogonal to the slice of interest for a region in the 3D medical image including the slice and wider than the slice.
    Type: Grant
    Filed: August 28, 2015
    Date of Patent: September 10, 2019
    Assignee: General Electric Company
    Inventor: Hasnine Haque
  • Patent number: 10405772
    Abstract: Techniques and systems for non-contrast enhanced magnetic resonance angiography and venography (MRAV) are described. For example, within one cardiac cycle of a subject, a single shot acquisition of non-suppressed arterial MR signals and a single shot acquisition of non-suppressed venous MR signals are employed. Radio frequency (RF) saturation pulses may be applied to one or more slabs such that MR signals indicative of venous blood that flows into the arterial imaging slice are substantially suppressed and MR signals indicative of arterial blood that flows in the venous imaging slice are substantially suppressed. The RF saturation pulses and the single shot acquisitions may be timed such that one or more of the single shot acquisitions occur during substantially steady state inflow of blood into the respective imaging slice. In this manner, k-space data may be acquired from arterial specific and venous specific imaging slices occurring within a single cardiac cycle.
    Type: Grant
    Filed: September 18, 2012
    Date of Patent: September 10, 2019
    Assignees: WISCONSIN ALUMNI RESEARCH FOUNDATION, INC., GENERAL ELECTRIC COMPANY
    Inventors: Frank R. Korosec, James H. Holmes, Daniel V. Litwiller, Mahdi Salmani Rahimi
  • Patent number: 10410344
    Abstract: Systems and methods for generating a medical image of a subject that includes functional information. First, two medical images are acquired. One is weighted based on functional information reflecting physiological functions of the subject and the other weighted based on anatomic information of the subject. A difference image between the two images are generated. By subjecting the difference image and the second image to a localized kernel, a local similarity image is generated. Using the local similarity image, an improved difference image is generated. Lastly, by subtracting the improved difference image from the first image, an enhanced medical image that retains the functional information reflecting physiological functions of the subject is generated.
    Type: Grant
    Filed: December 4, 2017
    Date of Patent: September 10, 2019
    Assignee: Beth Israel Deaconess Medical Center, Inc.
    Inventors: David Alsop, Li Zhao
  • Patent number: 10401459
    Abstract: Systems and methods for acquiring magnetic resonance images that accurately depict vascular calcifications, or other objects composed of magnetic susceptibility-shifted substances, in a subject are provided. The images are generally acquired using a pulse sequence that is designed to reduce physiological motion-induced artifacts and to mitigate chemical-shift artifacts from water-fat boundaries. Advantageously, the MRI technique described here suppresses chemical-shift artifacts without significantly reducing the signal intensity from fatty tissues, and thereby allows for more reliable visualization of vascular calcifications.
    Type: Grant
    Filed: October 1, 2015
    Date of Patent: September 3, 2019
    Assignee: NORTHSHORE UNIVERSITY HEALTH SYSTEM
    Inventors: Ioannis Koktzoglou, Robert R Edelman
  • Patent number: 10393558
    Abstract: A method for operating a nuclear magnetic flowmeter for determining the flow of a slug flow medium flowing through a measuring tube, with which “tuning” parameters and “matching” parameters are set for a slug zone a film zone, reflected power is measured over time. If the reflected power in a system set for slug zone is low for the slug zone and high for the film zone and if the reflected power in a system set for film zone is low for the film zone and high for the slug zone, relative dwell time of the slug zone and the film zone in the RF coil and the relative frequency of the slug zones and film zones in the flowing medium are determined using the reflected power with a jump in the value of the reflected power from a high value to a lower value used to trigger measurement initiation.
    Type: Grant
    Filed: July 9, 2015
    Date of Patent: August 27, 2019
    Assignee: KROHNE AG
    Inventors: Cornelis Johannes Hogendoorn, Rutger Reinout Tromp, Olaf Jean Paul Bousché, Marco Leendert Zoeteweij, Lucas Matias Ceferino Cerioni
  • Patent number: 10368750
    Abstract: This shear wave imaging method, for collecting information on a target region (R) of a soft solid (S), comprises at least the steps a) of generating at least one shear wave (SW) in the target region, and b) of detecting a propagation pattern of the shear wave in the target region. Step a) is realized by applying to particles of the target region (R) some Lorentz forces resulting from an electric field (E) and from a magnetic field (B). At least one of the electric field (E) and the magnetic field (B) is variable in time, with a central frequency (fo) between 1 Hz and 10 kHz. Alternatively, both the electric and magnetic fields (E, B) are variable in time, with a central difference frequency (?fo) between 1 Hz and 10 kHz. The shear wave imaging installation comprises a first system (4, 7) for generating at least one shear wave (SW) in the target region (R) and a second system (10) for detecting a propagation pattern of the shear wave.
    Type: Grant
    Filed: July 10, 2014
    Date of Patent: August 6, 2019
    Assignees: INSERM (Institut National de la Santé et de la Recherche Médicale), Université Claude Bernard Lyon 1
    Inventors: Stefan Catheline, Jean-Yves Chapelon, Remi Souchon, Pol Grasland-Mongrain, Cyril Lafon
  • Patent number: 10359515
    Abstract: An ultrasound imaging system (100) includes a transducer array (102) that emits an ultrasound beam and produces at least one transverse pulse-echo field that oscillates in a direction transverse to the emitted ultrasound beam and that receive echoes produced in response thereto and a spectral velocity estimator (110) that determines a velocity spectrum for flowing structure, which flows at an angle of 90 degrees and flows at angles less than 90 degrees with respect to the emitted ultrasound beam, based on the received echoes.
    Type: Grant
    Filed: June 26, 2017
    Date of Patent: July 23, 2019
    Assignee: B-K Medical Aps
    Inventor: Jorgen Arendt Jensen
  • Patent number: 10345406
    Abstract: Calculation of shim settings for magnetic resonance imaging includes defining an examination volume for the magnetic resonance imaging in a body of the examination object, determining a local shim volume, which includes a subregion of the examination volume, calculating shim settings, wherein a tissue, which is present in the local shim volume, of the body of the examination object is incorporated into the calculation of the shim settings, and acquiring magnetic resonance raw data of the examination volume by operation of a magnetic resonance scanner, using the calculated shim settings.
    Type: Grant
    Filed: December 1, 2016
    Date of Patent: July 9, 2019
    Assignee: Siemens Healthcare GmbH
    Inventors: Stefanie Splitthoff, Ralf Ladebeck, Joerg Rothard, Johann Sukkau, Michael Wullenweber
  • Patent number: 10330511
    Abstract: Methods, apparatus, and systems for flow measurements by alternating magnetic fields are provided. An example alternating magnetic field flowmeter includes a magnetic token movable within a conduit for guiding a fluid flow (conductive or non-conductive) along a flow path, a magnetic field generator configured to generate alternating magnetic fields within the conduit to move the magnetic token along the flow path with a first flow velocity and opposite to the flow path with a second flow velocity, a detector configured to measure respective first and second electrical signals responsive to the alternating magnetic fields, the first and second electrical signals associated with the first and second flow velocities, and a processor configured to determine a flow rate of the fluid based on the first and second electrical signals. The alternating magnetic field flowmeter can include a calibrator configured to manually or automatically calibrate the flow rate with a correction factor.
    Type: Grant
    Filed: June 22, 2017
    Date of Patent: June 25, 2019
    Assignee: Saudi Arabian Oil Company
    Inventors: Fouad M. Alkhabbaz, Maatoug Al-Maatoug, Luay H. Al-Awami
  • Patent number: 10317499
    Abstract: Methods of processing MRI image data to reduce or eliminate motion-related artifacts in MRI images includes: electronically repeatedly acquiring sets of 2D or 3D k-space data of a target region of a subject using at least one MRI pulse sequence; electronically applying a bootstrapping procedure to produce a large number of images from the acquired k-space data; then electronically evaluating the images produced by the bootstrapping procedure; and electronically identifying an image with a minimal motion-related artifact level from the evaluation of the images produced by the bootstrapping procedure.
    Type: Grant
    Filed: March 25, 2014
    Date of Patent: June 11, 2019
    Assignee: Duke University
    Inventors: Nan-Kuei Chen, Mei-Lan Chu, Allen Song
  • Patent number: 10302732
    Abstract: The present invention is related to a method of acquiring free-breathing steady-state magnetic resonance images (MRI) and a free-breathing Magnetic Resonance (MR) imaging system (10) for generating a MR image of a test subject (20) at least comprising a magnetic field unit, a control unit for controlling functions of the MR imaging system, an image processing unit and a user interface capable of receiving parameters defining a MR-pulse sequence, wherein the MR imaging system further comprises a detection unit (36) for detecting physiological activity of a test subject and a data processing unit (40) capable of performing statistical analysis of the physiological activity data and capable to adaptively tailor at least one of the parameters of the MR-pulse sequence based on the statistical analysis. This includes at least adjustment of at least the starting points and/or the duration of dummy excitations which are part of the MR-pulse sequence.
    Type: Grant
    Filed: November 21, 2014
    Date of Patent: May 28, 2019
    Assignee: Koninklijke Philips N.V.
    Inventors: Amol Pednekar, Raja Muthupillai
  • Patent number: 10302727
    Abstract: A system and method for producing high resolution diffusion information and imaging from a subject. In some aspects, the method includes receiving a plurality of low resolution diffusion images, each acquired with a different set of gradient directions and shifted in a slice direction, and generating a model correlating diffusion signals associated with the plurality of low resolution diffusion images and a high resolution diffusion image. The method also includes reconstructing the high resolution diffusion image by minimizing a cost function determined using the model. In some applications, the method further includes processing the high resolution diffusion image to generate a report providing diffusion information associated with the subject.
    Type: Grant
    Filed: November 13, 2015
    Date of Patent: May 28, 2019
    Assignee: The General Hospital Corporation
    Inventors: Yogesh Rathi, Lipeng Ning, Oleg Michailovich, Kawin Setsompop
  • Patent number: 10274564
    Abstract: An embodiment in accordance with the present invention provides a method of non-invasively detecting and imaging temperature or temperature changes by assessing the temperature induced shifts in the saturation spectrum of water using MRI, namely saturation shift referencing. This procedure includes the MRI procedures to assess water saturation spectrum and the data processing steps to determine the temperature induced shifts of water resonance frequency and consequently to estimate the temperature change. This procedure also includes the procedure of assessing fat saturation spectrum and estimating fat resonance frequency. This method can be used as a clinical procedure for temperature mapping in multiple applications, especially where a significant amount of fat is present. One application is to monitor the temperature of the targeted tumor and its surrounding tissues during the procedure of hyperthermia.
    Type: Grant
    Filed: September 17, 2013
    Date of Patent: April 30, 2019
    Assignees: THE JOHNS HOPKINS UNIVERSITY, KENNEDY KRIEGER INSTITUTE, INC.
    Inventors: Guanshu Liu, Assaf A. Gilad, Michael T. McMahon, Peter C. Van Zijl
  • Patent number: 10274633
    Abstract: The present invention provides a three dimensional nuclear magnetic resonance logging instrument based on multiple antenna excitation, including: a probe, an excitation transmitter and a bearing component; the probe includes magnet and multiple antennas arranged at outer side of the magnet, and the multiple antenna individually and independently provide feed; a holding cavity is provided in the bearing component, and the excitation transmitter is fixed in the holding cavity; and the excitation transmitter includes a transmitter framework and an excitation circuit; the transmitter framework and the bearing component are fixedly connected; and the excitation circuit is fixed on the transmitter framework, and is electrically connected with each of the multiple antennas for feeding the multiple antennas.
    Type: Grant
    Filed: September 7, 2016
    Date of Patent: April 30, 2019
    Assignee: CHINA UNIVERSITY OF PETROLEUM-BEIJING
    Inventors: Lizhi Xiao, Wei Liu, Guangzhi Liao, Xin Li
  • Patent number: 10261155
    Abstract: Systems and methods for accelerating magnetic resonance fingerprinting (“MRF”} acquisitions are described. Acquisition parameters can be optimized to reduce the number of acquisitions necessary while maximizing the discrimination between the physical parameters to be estimated. The systems and methods may also include implementing pulse sequences that rapidly acquire large volumes of k-space data, including echo-planar imaging (“EPI”} and segmented EPI sequences.
    Type: Grant
    Filed: January 29, 2015
    Date of Patent: April 16, 2019
    Assignee: The General Hospital Corporation
    Inventor: Ouri Cohen
  • Patent number: 10262385
    Abstract: In a method and apparatus to acquire magnetic resonance data from a subject and to enter the acquired data into k-space, data entered in an upper-half portion of k-space are acquired under a forward phase encoding gradient of the scanner so as to obtain a first portion of k-space data, and data in a lower-half portion of k-space are acquired under a reverse phase encoding gradient of the scanner so as to obtain a second portion of k-space data. The first portion of k-space data and the second portion of k-space data are combined to form complete k-space data, wherein the first portion of k-space data and the second portion of k-space data each constitute at least half of the complete k-space data.
    Type: Grant
    Filed: December 11, 2015
    Date of Patent: April 16, 2019
    Assignee: Siemens Healthcare GmbH
    Inventors: Wei Liu, Kun Zhou
  • Patent number: 10254372
    Abstract: A method is provided for recording, with a magnetic resonance device, magnetic resonance data of a target region of a patient moved by their breathing. An optical camera arranged in a bore of the magnetic resonance device directed onto the patient is used. Image data of the patient recorded by the camera before and/or during the recording of the magnetic resonance data is evaluated to form breathing information describing the breathing state and the breathing information is used for triggering and/or movement correction and/or assessment of a process in which a patient holds their breath.
    Type: Grant
    Filed: September 9, 2016
    Date of Patent: April 9, 2019
    Assignee: Siemens Healthcare GmbH
    Inventors: Andreas Greiser, Maria Kröll, Dominik Paul, Steffen Schröter, Jens Thöne
  • Patent number: 10228432
    Abstract: The present disclosure provides systems and methods for universal mapping of T1 in abdominal organs using cardiac gating. A region of interest is selected for mapping or imaging. A determination is made whether any one or more of heart associated motion, high heart rate and irregular heart beat are detected in the region of interest. A multi-pathway gating of T1 maps is then employed providing a universal method of T1 mapping of moving as well as non-moving visceral organs.
    Type: Grant
    Filed: December 13, 2012
    Date of Patent: March 12, 2019
    Assignee: Oxford University Innovation Limited
    Inventors: Stefan Piechnik, Rajarshi Banerjee, Elizabeth Tunnicliffe, Matthew Robson, Stefan Neubauer
  • Patent number: 10213178
    Abstract: A method of determining a residue function in brain tissue, from medical images acquired after introducing contrast agent into the blood, correcting for contrast agent leakage into the tissue, comprising: a) providing time signals indicating contrast agent concentration for leaking voxels, a time signal indicating average contrast agent concentration for non-leaking voxels, and an artery input function, all derived from the images; b) fitting the leaking voxel signals to a model time signal with a free parameter for leakage rate, the model assuming that the concentration of contrast agent perfusing through a leaking voxel has a same shape as a function of time as the average contrast agent concentration for non-leaking voxels; c) using the best fit leakage rate parameter to make a correction for leakage to the leaking voxel signals; and d) deconvolving the corrected signals from the artery input function, to find the residue function.
    Type: Grant
    Filed: September 18, 2017
    Date of Patent: February 26, 2019
    Assignee: Algotec Systems Ltd.
    Inventor: Ohad Silbert
  • Patent number: 10197658
    Abstract: A method for using flexible triggered segmentation to optimize magnetic resonance imaging includes partitioning a k-space table into a plurality of k-space segments, each respective k-space segment comprising one or more phase-encoding steps from a plurality of slice-encoding lines. A cardiac cycle is monitored using an electrical signal tracking system and used to trigger acquisition of the plurality of k-space segments over a plurality of acquisition windows.
    Type: Grant
    Filed: July 11, 2014
    Date of Patent: February 5, 2019
    Assignee: Siemens Healthcare GmbH
    Inventors: Yutaka Natsuaki, Randall Kroeker, Gerhard Laub, Peter Schmitt
  • Patent number: 10186032
    Abstract: Embodiments can provide a computer-implemented method for simultaneous multi-slice pulse wave velocity measurement, the method comprising simultaneously acquiring a plurality of multiple parallel images slices from a medical imaging device; shifting the plurality of image slices through modulation of the line-by-line phase patterns for each slice in the plurality of slices; deriving a plurality of image waveforms from the plurality of slices; measuring a distance between a plurality of imaging planes corresponding to the plurality of image slices; determining, for each of the image waveforms, a time-to marker; determining the temporal shift by calculating the difference between the time-to markers; and computing the pulse wave velocity by dividing the distance between the plurality of imaging planes by the temporal shift.
    Type: Grant
    Filed: June 15, 2017
    Date of Patent: January 22, 2019
    Assignee: Siemens Healthcare GmbH
    Inventors: Ning Jin, Jiang Pang, Dingxin Wang, Peter Speier, Shivraman Giri
  • Patent number: 10182739
    Abstract: There is provided a magnetic resonance imaging system using magnetic resonance electrical impedance tomography comprising: a current generation controller configured to control an electric current which is applied to a measurement target; a converter configured to perform analog-digital conversion of data which are obtained by a RF pulse and a gradient pulse applied to the measurement target every repetition time according to a sequence for steady state free precession (SSFP) and, also, by the applied electric current; and an image generator configured to generate an image upon a conductivity distribution of the measurement target by using output data of the converter, wherein the current generation controller controls the electric current to be applied for a preset time within a certain repetition time.
    Type: Grant
    Filed: March 3, 2015
    Date of Patent: January 22, 2019
    Assignee: KOREA UNIVERSITY RESEARCH AND BUSINESS FOUNDATION
    Inventors: Jaeseok Park, Hyunyeol Lee
  • Patent number: 10185016
    Abstract: A method for phase-contrast imaging a fluid within a volume of an imaged subject is provided. The method includes acquiring a plurality of slabs, each slab imaging the fluid flowing within a portion of the volume; and volume merging the plurality of slabs to form an image of the volume. Each slab of the plurality is aligned with respect to the volume such that each slab of the plurality is continuously supplied with a plurality of magnetically unsaturated portions of the fluid during acquisition.
    Type: Grant
    Filed: April 22, 2016
    Date of Patent: January 22, 2019
    Assignees: General Electric Company, The Board of Trustees of the Leland Stanford Junior University
    Inventors: Peng Lai, Joseph Yitan Cheng