公开(公告)号：US09927546B2

公开(公告)日：2018-03-27

申请号：US15250666

申请日：2016-08-29

申请人： SeeScan, Inc.

发明人： Mark S. Olsson ,  Ray Merewether ,  Inho Shin ,  Jan Soukup ,  Stephanie M. Bench ,  David A. Cox

IPC分类号： G01V3/08 ,  G01V3/00 ,  G01V3/165 ,  G01V3/02

CPC分类号： G01V3/165 ,  G01V3/02 ,  G01V3/04 ,  G01V3/06 ,  G01V3/081 ,  G01V3/104 ,  G01V3/12

摘要： Buried object locator systems including transmitters and associated buried object locators using phase-synchronized signals are disclosed. A transmitter may generate output current signals that are phase-synchronized with a corresponding locator for improved utility locating.

公开(公告)号：US09927506B2

公开(公告)日：2018-03-27

申请号：US14151566

申请日：2014-01-09

申请人： Hong Cheng ,  Stefan Pott ,  JianMin Wang ,  Lan Wang

发明人： Hong Cheng ,  Stefan Pott ,  JianMin Wang ,  Lan Wang

IPC分类号： G01V3/00 ,  G01R33/36

CPC分类号： G01R33/3664

摘要： A transmit antenna selector includes a control circuit, a body coil signal output interface, a local coil signal output interface, a radio-frequency signal input interface, and a dummy load. The control circuit includes a plurality of diodes. The control circuit electrically connects, according to a control signal and via the plurality of diodes, the radio-frequency signal input interface with the body coil signal output interface, with the local coil signal output interface, or with the dummy load.

公开(公告)号：US09927500B2

公开(公告)日：2018-03-27

申请号：US14427647

申请日：2013-08-16

申请人： BRUKER BIOSPIN MRI GMBH

发明人： Michael Heidenreich ,  Jochen Franke ,  Volker Niemann ,  Rainer Pietig

IPC分类号： G01V3/00 ,  G01R33/12 ,  A61B5/05 ,  A61B5/055 ,  G01R33/48 ,  A61B5/00 ,  G01R33/3815 ,  G01R33/383 ,  G01R33/563

CPC分类号： G01R33/1276 ,  A61B5/0035 ,  A61B5/0515 ,  A61B5/055 ,  G01R33/3815 ,  G01R33/383 ,  G01R33/4808 ,  G01R33/5635

摘要： Device for alternating examination of a measurement object (103) by means of MPI and MRI within a magnetic system is characterized in that the magnetic system has a specified magnetic field profile, which is not temporally variable during the alternating examination, and both magnetic field generating elements (101,102; 201,202; 801a,801b,811,812) generate a magnetic field portion, in the first examination region (104) and in the second examination region (105), which is essential for the MRI operation and for the MPI operation, and in that there is a transport apparatus (106) by means of which the measurement object can be moved out of the first examination region and into the second examination region and/or vice versa. The total space requirement for both modalities is thus reduced and the complexity of an integrally designed hybrid system is minimized.

公开(公告)号：US09915717B2

公开(公告)日：2018-03-13

申请号：US13995869

申请日：2011-12-20

申请人： Kamil Ugurbil

发明人： Kamil Ugurbil

IPC分类号： G01V3/00 ,  G01R33/561 ,  G01R33/483 ,  G01R33/56

CPC分类号： G01R33/561 ,  G01R33/4835 ,  G01R33/5602

摘要： A method for acquiring image data from a plurality of slice locations in a subject with a magnetic resonance imaging (MRI) system is provided. The method includes directing the MRI system to perform a pulse sequence that includes performing a contrast preparation module configured to generate contrast-encoded longitudinal magnetization and an image encoding module configured to acquire image data from multiple slice locations substantially simultaneously. The contrast preparation module generally includes tipping longitudinal magnetization into the transverse plane to produce transverse magnetization, generating contrast-prepared transverse magnetization by establishing an image contrast in the transverse magnetization, and tipping the contrast-prepared magnetization back along the longitudinal axis to produce the contrast-encoded longitudinal magnetization.

公开(公告)号：US09915714B2

公开(公告)日：2018-03-13

申请号：US15013584

申请日：2016-02-02

申请人： University of Pittsburgh—Of the Commonwealth System of Higher Education

发明人： Qiuhong He

IPC分类号： G01V3/00 ,  G01R33/46 ,  G01R33/56 ,  G01R33/12 ,  G01R33/34 ,  G01R33/48 ,  G01R33/485

CPC分类号： G01R33/4608 ,  G01R33/1284 ,  G01R33/34046 ,  G01R33/4828 ,  G01R33/485 ,  G01R33/5605 ,  G01R33/5607

摘要： Systems and methods employing spin editing techniques to improve magnetic resonance spectroscopy (MRS) and magnetic resonance spectroscopic imaging (MRSI) are discussed. Using these spin editing techniques, magnetic resonance signals of one or more unwanted chemicals (that is, chemicals whose signals are to be filtered out or suppressed) chemicals can be suppressed, so that the signal(s) of a first set of chemicals can be obtained without signals from the one or more unwanted chemicals. Information about and differences between the molecular topologies of the first set of chemicals and the one or more unwanted chemicals can be used to design a sequence that suppresses the one or more unwanted chemicals while allowing acquisition of signal(s) from the first set of chemicals.

公开(公告)号：US09910118B2

公开(公告)日：2018-03-06

申请号：US13867922

申请日：2013-04-22

申请人： University of Virginia Patent Foundation

发明人： Xue Feng ,  Michael Salerno ,  Christopher M. Kramer ,  Craig H. Meyer

IPC分类号： G01V3/00 ,  G01R33/48 ,  G01R33/56 ,  G01R33/563 ,  G01R33/561

CPC分类号： G01R33/482 ,  G01R33/5608 ,  G01R33/5611 ,  G01R33/56308

摘要： Systems and methods for Cartesian dynamic imaging are disclosed. In one aspect, in accordance with one example embodiment, a method includes acquiring magnetic resonance data for an area of interest of a subject that is associated with one or more physiological activities of the subject and performing image reconstruction comprising Kalman filtering or smoothing on Cartesian images associated with the acquired magnetic resonance data. Performing the image reconstruction includes increasing at least one of spatial and temporal resolution of the Cartesian images.

公开(公告)号：US09910117B2

公开(公告)日：2018-03-06

申请号：US14314254

申请日：2014-06-25

申请人： Siemens Aktiengesellschaft

发明人： Matthias Fenchel ,  David Grodzki

IPC分类号： G01V3/00 ,  G01R33/48 ,  G01R33/565

CPC分类号： G01R33/4816 ,  G01R33/4824 ,  G01R33/56572

摘要： In the magnetic resonance image data acquisition and apparatus, raw magnetic resonance data are acquired at multiple points along a trajectory in k-space from first and second magnetic resonance echo signals caused by a radio-frequency excitation pulse. The course of the trajectory in k-space is established by adjusting a magnetic field value of a gradient magnetic field. The gradient magnetic field has a field value of a first point in time of the trajectory curve and a subsequently modified and at a layer second point in time, the gradient magnetic field has the same field value as that said first point in time. The second point in time is before or during the acquisition of the raw magnetic resonance data of the first magnetic resonance echo signal. The shift value for the trajectory is determined and the trajectory is shifted according to this shift value, and an image is reconstructed from the shifted raw magnetic resonance data of the trajectory.

公开(公告)号：US09903928B2

公开(公告)日：2018-02-27

申请号：US14174368

申请日：2014-02-06

申请人： Regents of the University of Minnesota

发明人： Angela Lynn Styczynski Snyder ,  Carl J. Snyder ,  Michael G. Garwood ,  J. Thomas Vaughan, Jr.

IPC分类号： G01V3/00 ,  G01R33/48 ,  G01R33/483 ,  G01R33/565

CPC分类号： G01R33/4816 ,  G01R33/4833 ,  G01R33/56536 ,  G01R33/56563 ,  G01R33/5659

摘要： A method for generating a magnetic resonance image includes configuring a magnetic field to correspond to a trajectory within a region of interest. The method includes applying RF excitation to spatially control a region of magnetic resonance corresponding to the trajectory. The method includes modulating the magnetic field coincident with the spatially controlled region of magnetic resonance. The method includes acquiring data corresponding to the region of magnetic resonance and generating an image based on the data.

公开(公告)号：US09903925B2

公开(公告)日：2018-02-27

申请号：US13921724

申请日：2013-06-19

申请人： Korea Research Institute of Standards and Science

发明人： Ki Woong Kim ,  Seong-Joo Lee ,  Chan Seok Kang ,  Seong-min Hwang ,  Yong-Ho Lee

IPC分类号： G01V3/00 ,  G01R33/36 ,  G01R33/28 ,  G01R33/44 ,  G01R33/62 ,  G01R33/30 ,  G01R33/32 ,  G01R33/48

CPC分类号： G01R33/36 ,  G01R33/282 ,  G01R33/307 ,  G01R33/326 ,  G01R33/3607 ,  G01R33/445 ,  G01R33/4826 ,  G01R33/62

摘要： Provided are a low-field nuclear magnetic resonance device and a low-field nuclear magnetic resonance method. The low-field nuclear magnetic resonance device includes a dynamic nuclear polarization (DNP) amplification unit to amplify the nuclear polarization of hydrogen atoms of water using a DNP-possible substance (DNP substance) to provide the amplified nuclear polarization to a measurement target, a sensor unit to measure a magnetic resonance signal of the measurement target using a SQUID sensor or an optically-pumped atomic magnetometer, and a measurement field coil to apply a measurement field to the measurement target. The DNP amplification unit is separated from the measurement target, the sensor unit, and the measurement field coil.

公开(公告)号：US09903197B2

公开(公告)日：2018-02-27

申请号：US14568980

申请日：2014-12-12

申请人： BAKER HUGHES INCORPORATED

发明人： Manfred G. Prammer

IPC分类号： G01V3/00 ,  E21B47/12 ,  G01V3/18 ,  G01V3/26 ,  G01V3/28 ,  E21B17/00 ,  E21B17/02 ,  E21B41/00 ,  G01V3/08

CPC分类号： E21B47/122 ,  E21B17/003 ,  E21B17/028 ,  E21B41/0085 ,  E21B47/12 ,  G01V3/08 ,  G01V3/18 ,  G01V3/26 ,  G01V3/28 ,  G01V2003/084

摘要： A high-frequency data and/or power transmission system suitable for downhole use including signal/power couplers, transmission line segments and signal repeaters. Signals and power are/is transmitted between couplers and/or between couplers and repeaters by means of electromagnetic resonance coupling. In at least a portion of the system, the transmission line segments form parallel data paths and the repeaters provide crossover capability between the data/power paths, thereby significantly improving reliability. The invention also includes methods of transmitting data and/or distributing high-frequency power through a downhole transmission system including multiple data/power paths and multiple crossovers wherein a fault location in one data/power path is bypassed by routing data and/or power to a parallel data/power path by means of electromagnetic resonance coupling.