To Obtain Localized Resonance Within A Sample Patents (Class 324/309)
  • Patent number: 10379190
    Abstract: A method of determining an actual gradient impulse response function during execution of a magnetic resonance (MR) imaging or spectroscopy sequence, wherein a main magnetic field is generated in a sample region of an MR apparatus by means of a main magnet and wherein superimposed time dependent gradient fields and radiofrequency fields in a first RF band are generated in the sample region according to a first MR sequence for forming images or spectra, the gradient fields being generated by gradient forming means of the MR apparatus operated according to a gradient forming sequence part of said first MR sequence, the MR apparatus further comprising at least one magnetic field probe.
    Type: Grant
    Filed: May 12, 2016
    Date of Patent: August 13, 2019
    Assignee: Eidgenossische Technische Hochschule (ETH) ETH Zentrum
    Inventors: Bertram Wilm, Christoph Barmet, Klaas P. Prussmann
  • Patent number: 10379185
    Abstract: In a method and apparatus for acquiring magnetic resonance (MR) data from a subject, excitation pulses and at least two refocusing pulses are applied to the subject in an MR scanner, and the MR scanner is operated to activate gradients in a readout direction that cause at least two gradient echoes to be formed between the at least two successive refocusing pulses, with a temporal distance between the at least two gradient echoes that produces a predetermined phase shift between a signal acquired from a first nuclei in the subject and a signal acquired from a second nuclei in the subject at times of the respective gradient echoes, and that include readout gradients associated respectively with a first and a last gradient echo, among said at least two gradient echoes, the readout gradients being asymmetrical.
    Type: Grant
    Filed: July 30, 2015
    Date of Patent: August 13, 2019
    Assignee: Siemens Aktiengesellschaft
    Inventors: Alto Stemmer, Cong Zhao
  • Patent number: 10379184
    Abstract: In a method of MR imaging with an MR device (1), an object (10) is positioned in an examination volume of the MR device (1). ‘Silent’ MR imaging with T2*-weighted or diffusion-weighted contrast is enabled. The method of subjecting the object (10) to an imaging sequence comprising: includes: a) varying a magnetic field gradient vector (GX, GY, GZ) from an initial position (A) to an end position (B) over a plurality of intermediate positions while a number of RF pulses (20) is radiated in the presence of the magnetic field gradient; b) varying the magnetic field gradient vector (GX, GY, GZ) again from the initial position (A) to the end position (B) over the plurality of intermediate positions while a number of MR echo signals is acquired in the presence of the magnetic field gradient; c) sampling a spherical volume in k-space by repeating steps a) and b) a number of times for different initial, intermediate, and/or end positions; and d) reconstructing a MR image from the acquired MR echo signals.
    Type: Grant
    Filed: November 30, 2015
    Date of Patent: August 13, 2019
    Assignee: KONINKLIJKE
    Inventor: Miha Fuderer
  • Patent number: 10379180
    Abstract: The transmission antenna apparatus is configured for emitting transmission magnetic fields in magnetic resonance imaging devices and includes one or more flat antennas. A magnetic resonance imaging device includes such a transmission antenna apparatus.
    Type: Grant
    Filed: November 12, 2014
    Date of Patent: August 13, 2019
    Assignee: Siemens Aktiengesellschaft
    Inventors: Stephan Biber, Helmut Greim, Klaus Huber, Sebastian Martius, Johanna Dorothee Schöpfer
  • Patent number: 10371656
    Abstract: Tomography apparatus comprises: a plurality of electrodes arranged around a perimeter of a cross section of a sample volume for containing a liquid or mixed-phase sample, each electrode being arranged to be in electrical contact with a sample contained in the sample volume; measurement means adapted to perform a set of measurements, each measurement comprising driving a current between a first respective adjacent pair of said electrodes and measuring a voltage developed across a second respective adjacent pair of said electrodes; and processing means adapted to generate a tomogram indicative of sample conductivity over said cross section from said set of measurements. The processing means is arranged to calculate sample conductivity values of a portion of said cross section from said set of measurements and generate said tomogram from said calculated sample conductivity values of said portion using an assumption of symmetry.
    Type: Grant
    Filed: September 15, 2015
    Date of Patent: August 6, 2019
    Assignee: UNIVERSITY OF LEEDS
    Inventors: Mi Wang, Bishal Karki, Qiang Wang
  • Patent number: 10369385
    Abstract: A method for providing at least one measurement by a magnetic resonance imaging (MRI) system of a tissue property or underlying tissue property in a region sufficiently close to a metal object, so that the metal object induces artifacts is provided. At least one magnetic resonance imaging signal from the region is acquired through the MRI system. The acquired at least one MRI signal is processed to correct for artifacts induced by the metal object. At least one tissue property or underlying tissue property measurement is extracted from the processed at least one MRI signal.
    Type: Grant
    Filed: April 14, 2015
    Date of Patent: August 6, 2019
    Assignee: The Board of Trustees of the Leland Stanford Junior University
    Inventors: Hans Weber, Daehyun Yoon, Valentina Taviani, Brian A. Hargreaves
  • Patent number: 10371778
    Abstract: In a method and apparatus for recording a magnetic resonance data set, an MR data acquisition scanner is operated to acquire a range of basic values of a material parameter of a subject, with a basic resolution within a region of the subject. Thereafter, the aforementioned resolution is refined by selecting a refinement acquisition sequence, dependent on a material property to be refined, and then again operating the scanner to acquire further values for the refinement material parameter with a refined resolution, compared to the original resolution.
    Type: Grant
    Filed: March 13, 2017
    Date of Patent: August 6, 2019
    Assignee: Siemens Healthcare GmbH
    Inventor: Lars Lauer
  • Patent number: 10371771
    Abstract: A gradient amplifier system includes a gradient amplifier for driving a gradient current through the gradient coil. The gradient amplifier includes a gradient filter; a controller coupled to the gradient amplifier for controlling the gradient current in the gradient coil; a feedback loop for feeding only the gradient current in the gradient coil back to the controller. The controller is configured based on only the fedback gradient current in the gradient coil. Filter parameters of the gradient filter are adjusted to achieve a minimum shift between predetermined poles representing a desired performance of the gradient amplifier system and actual poles of a rational transfer function associated with the controller.
    Type: Grant
    Filed: July 30, 2015
    Date of Patent: August 6, 2019
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: Ying Zhang, Gong Chen, Keqiu Zeng
  • Patent number: 10371652
    Abstract: A process for profiling fluid distribution and analyzing fluid redistribution kinetics in multi-layer absorbent articles is disclosed.
    Type: Grant
    Filed: October 11, 2017
    Date of Patent: August 6, 2019
    Assignee: The Procter & Gamble Company
    Inventors: Behzad Mohebbi, Jan Claussen, Justyna Paradowska, J Michael Bills
  • Patent number: 10365335
    Abstract: According to an embodiment, a magnetic resonance imaging apparatus includes a couch, a gantry, a receiving coil, a converter, and a collector. On the couch, a subject is placed. The gantry supports a static magnetic field magnet and a gradient coil. The receiving coil receives a magnetic resonance signal emitted from the subject. The converter converts a magnetic resonance signal output from the receiving coil into a digital signal, thereby generating magnetic resonance signal data. The collector collects the magnetic resonance signal data. The couch or the gantry includes a coil port that connects the receiving coil and the collector to each other. The converter is provided in the coil port or a relay device that relays between the receiving coil and the coil port.
    Type: Grant
    Filed: February 26, 2015
    Date of Patent: July 30, 2019
    Assignee: TOSHIBA MEDICAL SYSTEMS CORPORATION
    Inventors: Akio Mori, Mitsuo Takagi
  • Patent number: 10363001
    Abstract: Disclosed herein is a magnetic resonance imaging apparatus. The magnetic resonance imaging apparatus includes a table disposed in a cavity which is formed in a bore, a head support having a support hole through which an upper surface of the table is visible to an object disposed on the table, and a display configured to display a graphical user interface (GUI) image, the display being disposed between the table and the head support.
    Type: Grant
    Filed: April 13, 2015
    Date of Patent: July 30, 2019
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Hyun Hee Jo, Young Ha Kim
  • Patent number: 10364665
    Abstract: A stress mapping system and method is operable to determine and map stresses along a conduit. The system includes a tool movable along a conduit and having at least one sensing device for sensing characteristics of the conduit, and a processor operable to process an output of the at least one sensing device. Responsive to processing of the output by the processor, the processor is operable to determine stresses at a surface of the conduit. Responsive to the processing of the output of the at least one sensing device, and responsive to a determination of a location or position of the tool along the conduit, the system generates a map of determined stresses along the conduit. The map of determined stresses provides a visual representation of the stresses determined at and along the surface of the conduit.
    Type: Grant
    Filed: July 18, 2017
    Date of Patent: July 30, 2019
    Assignee: QUANTA ASSOCIATES, L.P.
    Inventors: Bruce I. Girrell, Dean M. Vieau, Johana M. Chirinos, Douglas W. Spencer
  • Patent number: 10359483
    Abstract: According to one embodiment, a radio frequency coil unit includes coil elements, first switching parts and second switching parts. The coil elements are arranged in a first direction and a second direction. Each of the first switching parts and each of the second switching parts are installed in a corresponding coil element of the coil elements and switch the corresponding coil element between an on state and an off state. At least two of the first switching parts are connected in series in the first direction by a first control signal line. At least two of the second switching parts are connected in series in the second direction by a second control signal line.
    Type: Grant
    Filed: February 27, 2015
    Date of Patent: July 23, 2019
    Assignee: Toshiba Medical Systems Corporation
    Inventor: Kazuya Okamoto
  • Patent number: 10359481
    Abstract: A portable magnetic resonance imaging (“MRI”) system that uses static magnetic field inhomogeneities in the main magnet for encoding the spatial location of nuclear spins is provided. Also provided is a spatial-encoding scheme for a low-field, low-power consumption, light-weight, and easily transportable MRI system. In general, the portable MRI system spatially encodes images using spatial inhomogeneities in the polarizing magnetic field rather than using gradient fields. Thus, an inhomogeneous static field is used to polarize, readout, and encode an image of the object. To provide spatial encoding, the magnet is rotated around the object to generate a number of differently encoded measurements. An image is then reconstructed by solving for the object most consistent with the data.
    Type: Grant
    Filed: October 22, 2012
    Date of Patent: July 23, 2019
    Assignee: The General Hospital Corporation
    Inventors: Lawrence L. Wald, Clarissa Zimmerman, Jason Stockmann
  • Patent number: 10359489
    Abstract: A phase sensitive inversion recovery (PSIR)-based MR imaging method of at least two chemical species having different MR spectra enables distinction between myocardial scar and myocardial triglyceride deposition. The method includes the steps of: a) generating echo signals at two or more different echo times by subjecting an object (10) positioned in the examination volume of a MR device (1) to an imaging sequence of RF pulses and switched magnetic field gradients, which imaging sequence is an inversion recovery sequence including an inversion RF pulse followed by an excitation RF pulse after an inversion recovery time; b) acquiring the echo signals; c) separating signal contributions of the at least two chemical species to the acquired echo signals; and d) reconstructing a phase-sensitive MR image (28, 29) from the signal contributions of at least one of the chemical species.
    Type: Grant
    Filed: December 10, 2014
    Date of Patent: July 23, 2019
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: Peter Boernert, Jinnan Wang
  • Patent number: 10349896
    Abstract: The present application describes techniques to filter signals contaminated with blunt noise. Calculated filter coefficients may be applied to signals to generate filtered output signals without the blunt noise. Sets of filter coefficients may be calculated utilizing an ?-tube filter process in conjunction with an autoregressive exogenous (ARX) model. Sets of filter coefficients may be calculated in accordance with a constrained optimization algorithm using data indicative of a source of the blunt noise. When the blunt noise is modeled in accordance with the ARX model, filtered output signals are generated having amplitudes constrained to a selected Epsilon value, which may be the amplitude of a primary component of the unfiltered signal. A set of filter coefficients may be calculated by determining, from the set of filter coefficients that satisfy the constrained optimization algorithm, a solution that produces a filtered output signal having the most time-invariant frequency composition.
    Type: Grant
    Filed: December 8, 2014
    Date of Patent: July 16, 2019
    Assignee: THE REGENTS OF THE UNIVERSTIY OF MICHIGAN
    Inventors: Sardar Ansari, Kevin Ward, Kayvan Najarian
  • Patent number: 10353039
    Abstract: Efficient encoding of signals in an MRI image is achieved through a combination of parallel receiver coils, and nonlinear gradient encoding that varies dynamically in such a manner as to impose a unique phase/frequency time varying signal on each pixel in the field of view. Any redundancies are designed such that they are easily resolved by the receiver coil sensitivity profiles. Since each voxel has an essentially identifiable complex temporal signal, spatial localization is easily achieved with only a single echo acquisition.
    Type: Grant
    Filed: November 20, 2014
    Date of Patent: July 16, 2019
    Assignee: Yale University
    Inventors: Robert Todd Constable, Gigi Galiana
  • Patent number: 10353043
    Abstract: In a method and apparatus for correction of magnetic resonance image data, at least on environmental conditions map is provided to a computer, measurement data are acquired using a prospective correction method and storage of a first set of correction data, established within the framework of the prospective correction method, is stored. Image data are reconstructed from the recorded measurement data, and a second set of correction data are determined for the created image data and/or the recorded measurement data by a second correction method on the basis of the environmental conditions map and on the basis of the first set of correction data. Corrected image data are generated using the second set of correction data.
    Type: Grant
    Filed: September 30, 2016
    Date of Patent: July 16, 2019
    Assignee: Siemens Healthcare GmbH
    Inventor: Thorsten Feiweier
  • Patent number: 10353037
    Abstract: A magnetic resonance facility is operated by an external control device. The magnetic resonance facility includes an interface for communicating with the external control device and establishes a communications link between the external control device and the magnetic resonance facility via the interface, acquire an instruction from the external control device via the interface, and carries out the instruction on the magnetic resonance facility.
    Type: Grant
    Filed: January 19, 2017
    Date of Patent: July 16, 2019
    Assignee: Siemens Healthcare GmbH
    Inventors: Dirk Franger, Rainer Schneider
  • Patent number: 10353036
    Abstract: It is an aspect of the present disclosure to provide an MRI apparatus configured to and a method to acquire a sectional image of an object and implement a reduced Field of View (FOV) from which aliasing is removed by using a saturation pulse sequence that suppresses a magnetic resonance (MR) signal at a given position, and a method of controlling the same. An MRI apparatus may include: a sequence controller controlling a scanner to apply an unsaturation pulse sequence and a saturation pulse sequence to the object; and a data processor configured to acquire a first image by receiving an MR signal from the object to which the unsaturation pulse sequence is applied, acquire a second image by receiving an MR signal from the object to which the saturation pulse sequence is applied, and generate a difference image between the first image and the second image.
    Type: Grant
    Filed: December 21, 2016
    Date of Patent: July 16, 2019
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Sang Young Zho, Jong Buhm Park, Sung Pil Jung
  • Patent number: 10353042
    Abstract: According to one embodiment, an MRI apparatus includes a generator, an amplifier, and processing circuitry. The generator sequentially generates RF pulses comprising an RF pulse train defined in a pulse sequence. The amplifier amplifies the RF pulses sequentially inputted from the generator. The processing circuitry calculates a correction value, each time an amplified RF pulse is outputted from the amplifier, based on a difference between an output value of the amplified RF pulse and a reference output value. Further, the processing circuitry applies the correction value promptly to an RF pulse to be inputted to the amplifier, the RF pulse to be inputted to the amplifier being included in the RF pulse train and being generated after an RF pulse corresponding to the amplified RF pulse used for calculation of the correction value is generated.
    Type: Grant
    Filed: July 8, 2015
    Date of Patent: July 16, 2019
    Assignee: TOSHIBA MEDICAL SYSTEMS CORPORATION
    Inventor: Masaaki Yamanaka
  • Patent number: 10353025
    Abstract: Disclosed in embodiments of the present invention are a local coil for an MRI system and a method of use, and an MRI system. The local coil comprises: a storage module, for storing a coil file, the coil file comprising configuration attribute information of the local coil; an interface module, for communication with the outside; a control module, for reading the coil file from the storage module and sending the coil file to the outside via the interface module, or receiving the coil file from the outside and storing the coil file in the storage module.
    Type: Grant
    Filed: October 28, 2016
    Date of Patent: July 16, 2019
    Assignee: Siemens Healthcare GmbH
    Inventors: Yong Chen, Chao Ming He, Yan Tu Huang, JianMin Wang
  • Patent number: 10345399
    Abstract: A magnetic resonance RF field is produced in a magnetic resonance imaging system that includes a main magnetic field apparatus and an object-bearing table movable relative to the main magnetic field apparatus and on which a local coil system is arranged. The local coil system includes a plurality of transmission elements. A current location of the object-bearing table relative to the main magnetic field apparatus is established. The transmission elements are automatically connected based on the current location of the object-bearing table.
    Type: Grant
    Filed: April 4, 2014
    Date of Patent: July 9, 2019
    Assignee: Siemens Aktiengesellschaft
    Inventors: Hans-Peter Fautz, Wolfgang Renz, Franz Schmitt
  • Patent number: 10345251
    Abstract: A portable nuclear magnetic resonance (NMR) device and a method of determining an oil concentration in water are disclosed. The portable NMR device can include a magnetic field assembly to carry out NMR measurements of water. The portable NMR device can include a housing to at least partly surround the magnetic field assembly and to substantially eliminate a magnetic fringe field generated by the magnetic field assembly outside the housing. The portable NMR device can also include an analysis module to receive the NMR measurement of the water and to determine, based on the received NMR measurements of the water, the oil concentration in the water.
    Type: Grant
    Filed: February 23, 2017
    Date of Patent: July 9, 2019
    Assignee: ASPECT IMAGING LTD.
    Inventor: Uri Rapoport
  • Patent number: 10345410
    Abstract: The method and apparatus for the acquisition of scan data of an examination object by execution of a magnetic resonance scanning protocol having at least one suppression module, a relevant volume in the examination object is determined in which the magnetization of the examination object to be examined is to be manipulated and/or the scan data are to be acquired. For each suppression module contained in the scanning protocol, the associated suppression volume in which signals are to be suppressed is determined. The relevant volume that has been determined is optimized by taking account of the determined suppression volumes. Optimized scanning parameters of the scanning protocol are determined such that the best possible scanning conditions prevail in the optimized relevant volume. The scanning protocol is executed as a scanner with the optimized scanning parameters determined and the scan data acquired thereby are made available as a data file.
    Type: Grant
    Filed: September 30, 2016
    Date of Patent: July 9, 2019
    Assignee: Siemens Healthcare GmbH
    Inventor: Thorsten Feiweier
  • Patent number: 10345400
    Abstract: The invention concerns a method for the hyperpolarisation of 13C nuclear spin in a diamond, comprising an optical pumping step, in which colour centre electron spins in the diamond are optically pumped. The method further comprises a transfer step in which the polarisation of a long-lived state of the colour centre electron spins is transferred to 13C nuclear spins in the diamond via a long-range interaction.
    Type: Grant
    Filed: April 7, 2014
    Date of Patent: July 9, 2019
    Assignee: UNIVERSITAET ULM
    Inventors: Fedor Jelezko, Jianming Cai, Martin Plenio, Alex Retzker, Boris Naydenov, Ilai Schwarz
  • Patent number: 10345411
    Abstract: Machine control parameters of a magnetic resonance apparatus are selected that influence the timing sequence of gradient pulses of the system's gradient system when a magnetic resonance measurement sequence is executed. The machine control parameters are compared with reference control parameters that indicate an increased mechanical force flow in the gradient system when the MR measurement sequence is being executed. As a function of the comparison, the MR measurement sequence is executed selectively with the selected machine control parameters.
    Type: Grant
    Filed: March 26, 2015
    Date of Patent: July 9, 2019
    Assignee: Siemens Aktiengesellschaft
    Inventor: David Grodzki
  • Patent number: 10345413
    Abstract: The invention provides for a magnetic resonance imaging system (100) configured for acquiring magnetic resonance data (142) from an imaging zone (108) according to a PROPELLER magnetic resonance imaging protocol. The pulse sequence is configured such that the pulse sequence data for each of the multiple blades of magnetic resonance data comprises coil specific magnetic resonance data (145, 146?, 146?, 146??) acquired for each of multiple antenna elements simultaneously (125, 126?, 126?, 126??). The magnetic resonance imaging system is further configured to perform the following for each blade: reconstruct (214) a blade image (150, 150?) from the coil specific magnetic resonance data for each antenna element according to a parallel imaging magnetic resonance imaging protocol, construct (218) a Chi map (153, 154?) for the blade image using the set of coil sensitivities, the blade image, and the coil specific magnetic resonance data.
    Type: Grant
    Filed: March 20, 2015
    Date of Patent: July 9, 2019
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventor: Elwin De Weerdt
  • Patent number: 10338167
    Abstract: In a magnetic resonance apparatus, a check is performed as to whether coordinate-transformed first values of system parameters of a scan protocol for a magnetic resonance scan sequence each comply with a corresponding limit value. The check is used as the basis for the adaptation of first values of scan parameters of the scan protocol in order to obtain second values of the scan parameters. The second values of the scan parameters are used as the basis for the adaptation of the coordinate-transformed first values of the system parameters in order to obtain second values of the system parameters.
    Type: Grant
    Filed: February 15, 2017
    Date of Patent: July 2, 2019
    Assignee: Siemens Healthcare GmbH
    Inventor: David Grodzki
  • Patent number: 10338170
    Abstract: A pre-amplifier for a magnetic resonance imaging radio-frequency coil. The pre-amplifier comprises an input matching circuit (1), an amplification circuit (2), an output matching circuit (3) and a narrow band filter (4) for filtering a magnetic resonance signal amplified through the amplification circuit (2). The present invention has the technical effect that the pre-amplifier for a magnetic resonance imaging radio-frequency coil generates a gain required by magnetic resonance imaging within a very small range near a magnetic resonance signal frequency point, but only generates a very small gain or has no amplification function completely at other frequency points, thereby significantly reducing the possibility of oscillation of the magnetic resonance imaging radio-frequency coil.
    Type: Grant
    Filed: May 12, 2015
    Date of Patent: July 2, 2019
    Assignee: SHANGHAI KOITO AUTOMOTIVE LAMP CO., LTD
    Inventors: Songtao Zhang, Hao Wang
  • Patent number: 10338178
    Abstract: Various embodiments accelerate high-resolution magnetic resonance spectroscopic imaging (MRSI). Various embodiments are built on a low-dimensional subspace model exploiting the partial separability of high-dimensional MRSI signals. For two and three dimensional MRSI with one spectral dimension, various embodiments sparsely sample the corresponding (k,t)-space in two complementary data sets, one with dense temporal sampling and high signal-to-noise ratio but limited k-space coverage and the other with sparse temporal sampling but extended k-space coverage. The reconstruction is then done by estimating a set of temporal/spectral basis functions and the corresponding spatial coefficients from these two data sets. The imaging technique of various embodiments can be used for high-resolution MRSI of different nuclei.
    Type: Grant
    Filed: January 11, 2016
    Date of Patent: July 2, 2019
    Assignee: THE BOARD OF TRUSTEES OF THE UNIVERSITY OF ILLINOIS
    Inventors: Zhi-Pei Liang, Fan Lam, Chao Ma
  • Patent number: 10339301
    Abstract: Disclosed are systems and methods of analysis of files for maliciousness in a virtual machine. An exemplary method comprises: opening and executing a file by a processor in a virtual machine; intercepting an event arising in the process of execution of a thread of a process created upon opening of the file; halting the execution of the thread; reading the context of the processor on which the thread is being executed; comparing the context of the processor with one or more rules; and based on the results of the comparison, performing at least one of: recognizing the file as being malicious; halting the execution of the process created upon opening of the file; changing the context of the processor; and waiting for the next intercepted event.
    Type: Grant
    Filed: March 7, 2017
    Date of Patent: July 2, 2019
    Assignee: AO Kaspersky Lab
    Inventors: Vladislav V. Pintiysky, Denis V. Anikin, Denis Y. Kobychev, Maxim Y. Golovkin, Vitaly V. Butuzov, Dmitry V. Karasovsky, Dmitry A. Kirsanov
  • Patent number: 10335049
    Abstract: Example embodiments associated with NMR fingerprinting are described. One example NMR apparatus includes an NMR logic that repetitively and variably samples a (k, t, E) space associated with an object to acquire a set of NMR signals that are associated with different points in the (k, t, E) space. Sampling is performed with t and/or E varying in a non-constant way. Sampling is performed in response to a fast imaging with steady state free precession (MRF-FISP) pulse sequence having an unbalanced gradient that dephases transverse magnetization. The NMR apparatus may also include a signal logic that produces an NMR signal evolution from the NMR signals, and a characterization logic that characterizes a resonant species in the object as a result of comparing acquired signals to reference signals. The unbalanced gradient in the MRF-FISP pulse sequence reduces sensitivity to B0 in homogeneity.
    Type: Grant
    Filed: April 9, 2015
    Date of Patent: July 2, 2019
    Assignee: Case Western Reserve University
    Inventors: Mark Griswold, Yun Jiang, Dan Ma
  • Patent number: 10338183
    Abstract: In a method and control device for magnetic resonance imaging, raw magnetic resonance data are acquired from one region of an examination object by a number of magnetic resonance receiving antennas of a magnetic resonance system. Calibration values are determined that represent the sensitivity of at least one of the magnetic resonance receiving antennas. An image reconstruction is performed on the basis of the raw magnetic resonance data, taking into consideration the determined calibration values. The determination of the calibration values is frequency-dependent.
    Type: Grant
    Filed: July 2, 2015
    Date of Patent: July 2, 2019
    Assignee: Siemens Aktiengesellschaft
    Inventor: Stefan Popescu
  • Patent number: 10338176
    Abstract: In a method and a magnetic resonance imaging system to generate magnetic resonance image data of an object, during the acquisition of magnetic resonance raw data, different transverse magnetizations are excited in multiple sub-volumes to be depicted and used for imaging. These different transverse magnetizations are simultaneously present in at least one time interval of the measurement. Image data are reconstructed from the acquired raw data.
    Type: Grant
    Filed: November 18, 2016
    Date of Patent: July 2, 2019
    Assignee: Siemens Healthcare GmbH
    Inventors: Thomas Beck, Thorsten Feiweier
  • Patent number: 10338180
    Abstract: A system and method for determining an actual gradient field generated by a magnetic resonance imaging (MRI) system when controlled to produce a prescribed gradient field is provided. The techniques include using the prescribed gradient field, controlling the MRI system to perform a phase encoding including a gradient that is scaled along each direction desired to be measured over a selected number of encoding times and acquiring one-dimensional (1D) data using a prescribed k-space trajectory during the phase encoding. The 1D data is used to determine scaling factors between encoding times that correlate to actual k-space trajectories achieved when controlling the gradient coils to perform the phase encoding based on the desired gradient field and a report is generated that provides a measure of the actual gradient field generated when controlling the MRI system to produce the prescribed gradient field.
    Type: Grant
    Filed: October 12, 2015
    Date of Patent: July 2, 2019
    Assignee: Wisconsin Alumni Research Foundation
    Inventors: Alan B. McMillan, Hyungseok Jang
  • Patent number: 10330752
    Abstract: In order to improve B1 non-homogeneity while reducing a local SAR in an object, particularly, in a human tissue during MR imaging, the present invention is characterized in that each of a plurality of irradiation channels is controlled on the basis of RF shimming parameters corresponding to the plurality of irradiation channels, and, in a case of performing imaging sequence of irradiating an object with an RF magnetic field, there is the use of the RF shimming parameters obtained by imposing a constraint condition on at least one of a plurality of principal components obtained through principal component analysis on the RF shimming parameters.
    Type: Grant
    Filed: February 15, 2016
    Date of Patent: June 25, 2019
    Assignee: HITACHI, LTD.
    Inventors: Kosuke Ito, Yoshihisa Soutome, Masahiro Takizawa
  • Patent number: 10330757
    Abstract: The invention provides for a magnetic resonance imaging system (100, 300, 100) for acquiring magnetic resonance data (110, 1104) from a subject (118) within an imaging zone (108). The magnetic resonance imaging system comprises a memory (136) for storing machine executable instructions (160, 162, 164, 166, 316) and pulse sequence data (140, 1102). The pulse sequence data comprises instructions for controlling the magnetic resonance imaging system to acquire magnetic resonance data according to a magnetic resonance imaging method. The magnetic resonance imaging system further comprises a processor (130) for controlling the magnetic resonance imaging system.
    Type: Grant
    Filed: January 21, 2016
    Date of Patent: June 25, 2019
    Assignee: Koninklijke Philips N.V.
    Inventors: Ulrich Katscher, Jan Jakob Meineke, Holger Eggers, Peter Boernert
  • Patent number: 10330759
    Abstract: In a method and apparatus for acquiring magnetic resonance (MR) data, an MR data acquisition scanner is operated, while a subject is situated therein to execute a simultaneous multislice (SMS) turbo spin echo (TSE) sequence by implementing a TSE-based reference scan to acquire reference data and an imaging scan, to acquire raw MR data from the subject. The reference data and the raw MR data are entered into a memory organized as k-space. A computer accesses the memory in order to make the k-space data, composed of said reference data and said image data, available in electronic form, as at least one data file.
    Type: Grant
    Filed: September 12, 2016
    Date of Patent: June 25, 2019
    Assignee: Siemens Healthcare GmbH
    Inventors: Flavio Carinci, Dominik Paul, Himanshu Bhat, Mario Zeller
  • Patent number: 10330762
    Abstract: The present invention is directed to a system and method for measuring blood volume using non-contrast-enhanced magnetic resonance imaging. The method of the present invention includes a subtraction-based method using a pair of acquisitions immediately following velocity-sensitized pulse trains for the label module and its corresponding control module, respectively. The signal of static tissue is canceled out and the difference signal comes from the flowing blood compartment above a cutoff velocity. After normalizing to a proton density-weighted image acquired separately and scaled with the blood T1 and T2 relaxation factors, quantitative measurement of blood volume is then obtained.
    Type: Grant
    Filed: April 12, 2017
    Date of Patent: June 25, 2019
    Assignee: The Johns Hopkins University
    Inventor: Qin Qin
  • Patent number: 10330765
    Abstract: The invention provides for a magnetic resonance imaging system. Instructions cause a processor (136) controlling the magnetic resonance imaging system to modify (200) pulse sequence data by omitting at least some of the phase encodings (408) that encode for volumes outside of the field of view. The pulse sequence data specifies the acquisition of a stack (128) of two dimensional slices of a field of view (126). The pulse sequence data further specifies phase encoding in a direction (130) perpendicular to the two dimensional slices. The pulse sequence data specifies a maximum SEMAC factor (400). The maximum SEMAC factor specifies a maximum number of phase encoding steps in the perpendicular direction for each of the two dimensional slices. The instructions further cause the processor to determine (202) a slice SEMAC factor for each of the stack of two dimensional slices. The slice SEMAC factor is determined by counting the phase encoding steps that encode for regions within the field of view.
    Type: Grant
    Filed: January 29, 2016
    Date of Patent: June 25, 2019
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventor: Silke Hey
  • Patent number: 10330742
    Abstract: Apparatus, including a flexible insulating substrate, having a first side and a second side, rolled about an axis parallel to the substrate. The apparatus also includes a first conducting spiral that is right-handed relative to a normal to the substrate, and a second conducting spiral that is left-handed relative to the normal, formed on the first side of the substrate. The first conducting spiral has a first initial termination and a first final termination, the second conducting spiral has a second initial termination and a second final termination, the spirals have a displacement therebetween, with a preset magnitude so that when the substrate is rolled about the axis the first initial termination aligns with the second initial termination. The apparatus also has a via penetrating the substrate from the first side to the second side so as to interconnect the first initial termination and the second initial termination.
    Type: Grant
    Filed: December 23, 2016
    Date of Patent: June 25, 2019
    Assignee: Biosense Webster (Israel) Ltd.
    Inventor: Assaf Govari
  • Patent number: 10330764
    Abstract: Provided is a magnetic resonance measuring apparatus that records measurement data measured by MRS or the like and a periodic motion of the measurement object during the measurement of the measurement data in association with each other, and classifies spectra calculated from the measurement data in accordance with a time phase of the periodic motion. Created spectra are integrated for each classification to thereby create partially integrated spectra, correction based on a relationship between the periodic motion and a phase fluctuation or a frequency fluctuation is performed on the partially integrated spectra, and the corrected partially integrated spectra are synthesized.
    Type: Grant
    Filed: October 6, 2016
    Date of Patent: June 25, 2019
    Assignee: HITACHI, LTD.
    Inventor: Yoshitaka Bito
  • Patent number: 10330758
    Abstract: The invention provides for a magnetic resonance imaging system (100) comprising: a magnet (104) for generating a main magnetic field with an imaging zone (110), and a gradient coil system (110, 112). The gradient coil system comprises a set of unshielded gradient coils (110). The magnetic resonance imaging system further comprises a processor (130) for controlling the magnetic resonance imaging system. Execution of the instructions stored in a memory cause the processor to: acquire (200, 304) imaging magnetic resonance data (152) from a volume (109) within the imaging zone using a zero echo time pulse sequence; reconstruct (202, 306) a three-dimensional image (156) using the imaging magnetic resonance data; subtract a calibration image from the three-dimensional image, the calibration image having been acquired without a subject in the imaging zone; and render the three-dimensional image on a display by projecting it on a two-dimensional plane.
    Type: Grant
    Filed: October 27, 2014
    Date of Patent: June 25, 2019
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventor: Paul Royston Harvey
  • Patent number: 10330763
    Abstract: The disclosed embodiments provide a method for acquiring MR data at resolutions down to tens of microns for application in in vivo diagnosis and monitoring of pathology for which changes in fine tissue textures can be used as markers of disease onset and progression. Bone diseases, tumors, neurologic diseases, and diseases involving fibrotic growth and/or destruction are all target pathologies. Further the technique can be used in any biologic or physical system for which very high-resolution characterization of fine scale morphology is needed. The method provides rapid acquisition of signal at selected values in k-space, with multiple successive acquisitions at individual k-values taken on a time scale on the order of microseconds, within a defined tissue volume, and subsequent combination of the multiple measurements in such a way as to maximize SNR.
    Type: Grant
    Filed: July 24, 2018
    Date of Patent: June 25, 2019
    Assignee: BIOPROTONICS INC.
    Inventors: Kristin James, Timothy W. James
  • Patent number: 10330816
    Abstract: Systems and methods are provided for investigating a downhole formation using a nuclear magnetic resonance (NMR) tool. While the tool is moving through the borehole, the formation is magnetized and resulting signals are obtained. In accordance with the present approach, the acquired signals can be resolved azimuthally and/or laterally and can be reconstructed to obtain an indication of a parameter of the formation at multiple locations along the length of the borehole.
    Type: Grant
    Filed: December 18, 2015
    Date of Patent: June 25, 2019
    Inventors: Jeffrey L. Paulsen, Yi-Qiao Song, Lalitha Venkataramanan, Robert Callan
  • Patent number: 10324150
    Abstract: In a method and apparatus for generating a magnetic resonance (MR) image data set of a target region, MR data for a first number of slices are recorded and the recording of MR data for a second number, which is smaller than or equal to the first number, of different slices takes place simultaneously. A separation algorithm of the parallel imaging is used to determine MR data that are assigned to individual slices from the multi-slice data set produced during the simultaneous recording of the multiple slices. This separation algorithm uses input parameters determined from a calibration data set of the target region, the calibration data set being recorded in a reference scan, after which the MR image data set is reconstructed from the MR data assigned to individual slices, wherein at least part of the calibration data set is also used for reconstructing the MR image data set.
    Type: Grant
    Filed: March 9, 2017
    Date of Patent: June 18, 2019
    Assignee: Siemens Healthcare GmbH
    Inventors: Mathias Blasche, Mario Zeller
  • Patent number: 10324156
    Abstract: Some implementations provide a MRI system configured to: access data encoding an input gradient waveform that would otherwise be used on a gradient sub-system of the MRI system to generate a gradient that corresponds to perturbations to the substantially uniform magnetic field; access data encoding a forward impulse response function and an inverse impulse response function, both characterizing a gradient generated from a target impulse input; pre-emphasizing the input gradient waveform by using both the forward impulse response function and the reverse impulse response function; and drive the gradient sub-system using the pre-emphasized gradient waveform such that distortions to the gradient caused by eddy currents within the gradient sub-system are substantially removed while radio-frequency (RF) samples for reconstructing an MRI image are being acquired from a grid that is substantially identical to when gradient sub-system is driven using the input gradient waveform.
    Type: Grant
    Filed: July 19, 2017
    Date of Patent: June 18, 2019
    Assignee: Synaptive Medical (Barbados) Inc.
    Inventors: Chad Tyler Harris, Andrew Thomas Curtis, Jeff Alan Stainsby, Geron André Bindseil
  • Patent number: 10321845
    Abstract: The invention provides for a magnetic resonance imaging system (100) which comprise a magnet (104) and a magnetic field gradient generator (110, 112) for generating a gradient magnetic field within an imaging zone (108). The gradient magnetic field is aligned with a predetermined direction. The magnetic resonance imaging system further comprise a memory (134, 136) for storing machine executable instructions (150, 152, 154), a pre-calculated magnetic resonance fingerprinting dictionary (144), and pulse sequence instructions (140). The pulse sequence instructions cause the magnetic resonance imaging system to acquire the magnetic resonance data according to a magnetic resonance fingerprinting technique. The magnetic resonance fingerprinting technique encodes the magnetic resonance data as slices (125).
    Type: Grant
    Filed: October 30, 2015
    Date of Patent: June 18, 2019
    Assignee: Koninklijke Philips N.V.
    Inventors: Thomas Erik Amthor, Mariya Ivanova Doneva, Peter Koken, Jochen Keupp, Peter Boernert
  • Patent number: 10324154
    Abstract: A magnetic resonance imaging method includes generating spatially resolved fiber orientation distributions (FODs) from magnetic resonance signals acquired from a patient tissue using a plurality of diffusion encodings, each acquired magnetic resonance signal corresponding to one of the diffusion encodings and being representative of a three-dimensional distribution of displacement of magnetic spins of gyromagnetic nuclei present in each imaging voxel. Generating the spatially resolved FODs includes performing generalized spherical deconvolution using the acquired magnetic resonance signals and a modeled tissue response matrix (TRM) to reconstruct the spatially resolved FODs. The method also includes using the spatially resolved FODs to generate a representation of fibrous tissue within the patient tissue.
    Type: Grant
    Filed: May 13, 2015
    Date of Patent: June 18, 2019
    Assignee: General Electric Company
    Inventors: Jonathan Immanuel Sperl, Christopher Judson Hardy, Luca Marinelli, Marion Irene Menzel, Ek Tsoon Tan