Electronic Circuit Elements Patents (Class 324/322)
  • Patent number: 10353028
    Abstract: Example apparatus and magnetic resonance imaging (MRI) radio frequency (RF) coils concern controlling current magnitude at different sections in one MRI RF coil. In one embodiment, an MRI RF coil comprises a plurality of loop coils configured to transmit or receive an RF signal. A member of the plurality of loop coils comprises an inductor and at least one capacitor. The MRI RF coil further comprises at least one coaxial transmission line that electrically couple in series a first member of the plurality of loop coils with a second, different member of the plurality of loop coils. The at least one coaxial transmission line has a length that is one-quarter wavelength (?/4) of the RF signal, or an odd integer multiple of ?/4 of the RF signal.
    Type: Grant
    Filed: October 31, 2016
    Date of Patent: July 16, 2019
    Assignee: Quality Electrodynamics, LLC
    Inventors: Xiaoyu Yang, Chris Allen
  • Patent number: 10352883
    Abstract: A mobile measuring apparatus for nondestructively determining a material measurement value that relates to a material property of a workpiece comprises a housing in which at least a first sensor device and a second sensor device are located, a control device, an evaluating device, and a device for the supply of energy to the measuring apparatus. The first sensor device has a nuclear magnetic resonance sensor and the second sensor device has a sensor based on dielectric and/or resistive methods. Information about the material property of the workpiece, in particular moisture present in the workpiece, is obtained by evaluating a measurement signal provided by the first sensor device, which information is intended for the optimized control of the second sensor device and/or optimized evaluation of measurement signals provided by the second sensor device.
    Type: Grant
    Filed: August 11, 2015
    Date of Patent: July 16, 2019
    Assignee: Robert Bosch GmbH
    Inventors: Reiner Krapf, Felix Kurz
  • Patent number: 10348421
    Abstract: In accordance with an embodiment a device is usable to measure radio frequency (RF) signals including microwave signals to provide an alarm when a power level at its input exceeds predetermined levels. A user can attach the device to a coax cable on a microwave or wireless tower to determine if certain power levels are present and what levels are exceeded. If high power is indicated by the device, the user will then avoid attaching that coax cable to other measurement equipment which would be damaged by excessive RF power. The device is further usable, for example, to apply power to one coax cable in a cable bundle then identify which cable of the bundle is getting the power by connecting the device on the output end of each coax in the bundle, one by one.
    Type: Grant
    Filed: October 30, 2015
    Date of Patent: July 9, 2019
    Assignee: ANRITSU COMPANY
    Inventors: Donald Anthony Bradley, Richard Glenn Barber, Stephen Andrew Robertson, Russel A. Brown, Elijah Brandon Jones, Danny Quintos Barrera
  • Patent number: 10345412
    Abstract: An imaging system includes determination of a first range of values of an imaging parameter, determination of a cost function expressing a difference between a first pulse profile and a second pulse profile, the second pulse profile generated based on respective values of each of a set of pulse parameters, identification of first coefficient values of each function of a set of functions which substantially minimize the cost function over the first range of values of the imaging parameter, where each of the set of functions determines a value of a respective one of the set of pulse parameters based on a value of the imaging parameter, and storage of the first coefficient values of each function of the set of functions in association with the first range of values.
    Type: Grant
    Filed: October 16, 2015
    Date of Patent: July 9, 2019
    Assignee: Siemens Healthcare GmbH
    Inventors: Shivraman Giri, Kieran O'Brien
  • Patent number: 10345405
    Abstract: A radiofrequency (RF) coil for use in a magnetic resonance imaging (MRI) system using a plurality of RF coils includes a main loop coil including a plurality of electrical conductors, and an auxiliary loop coil disposed around the plurality of electrical conductors and including a plurality of electrical conductors.
    Type: Grant
    Filed: December 26, 2014
    Date of Patent: July 9, 2019
    Assignees: Samsung Electronics Co., Ltd., Samsung Life Public Welfare Foundation
    Inventors: Kyoungnam Kim, Yeon Hyeon Choe
  • Patent number: 10302716
    Abstract: A system and method synchronizes a digitizer clock of a Magnetic Resonance Imaging (MRI) device with a system clock of an imaging device. In a first method, an original reference signal is split into first and second reference signals in which the second reference signal is phase shifted to generate an orthogonal reference signal. A reliability of image data may be determined based upon a product between the first reference signal and the orthogonal reference signal. In a second method, a reference signal is transmitted from the imaging device to the MRI device and a return signal is received from the MRI device to the imaging device. A discrepancy between the digitizer clock and the system clock may be determined based upon the return signal which includes a variable time delay.
    Type: Grant
    Filed: September 16, 2015
    Date of Patent: May 28, 2019
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventor: Arne Reykowski
  • Patent number: 10295628
    Abstract: An apparatus to provide power for operating at least one gradient coil of a magnetic resonance imaging system. According to some aspects, the apparatus comprises a plurality of power terminals configured to supply different voltages of a first polarity, and a linear amplifier configured to provide at least one output to power the at least one gradient coil to produce a magnetic field in accordance with a pulse sequence, the linear amplifier configured to be powered by one or more of the plurality of power terminals, wherein the one or more of the plurality of power terminals powering the linear amplifier is selected based, at least in part, on the at least one output.
    Type: Grant
    Filed: September 6, 2018
    Date of Patent: May 21, 2019
    Assignee: Hyperfine Research, Inc.
    Inventors: William J. Mileski, Gregory L. Charvat, Jonathan M. Rothberg, Jeremy Christopher Jordan
  • Patent number: 10291300
    Abstract: A system includes a transmitter having a first transmit device having a first transmit antenna and a first OAM multiplexer designed to receive two input signals and to convert the input signals to orthogonal OAM beams. The first transmit antenna is designed to transmit a first output signal that includes the OAM beams. The transmitter also includes a second transmit device that functions in a similar manner as the first transmit device. A receiver includes a first receive device having a first receive antenna designed to receive the first output signal and a first OAM demultiplexer designed to convert the first output signal to received signals corresponding to the input signals. The receiver also includes a second receive device having similar features as the first receive device. The receiver also includes a MIMO processor designed to reduce interference between the received signals.
    Type: Grant
    Filed: December 7, 2016
    Date of Patent: May 14, 2019
    Assignee: UNIVERSITY OF SOUTHERN CALIFORNIA
    Inventors: Alan E. Willner, Yongxiong Ren, Long Li
  • Patent number: 10274567
    Abstract: A magnetic resonance imaging apparatus according to one embodiment includes an arranger, a sensitivity deriver, and an image generator. The arranger arranges time-series data at a part of sampling points out of sampling points of a k-space determined based on an imaging parameter. The sensitivity deriver derives a sensitivity distribution in a time-space, in which the time-series data transformed in a time direction is expressed with a coefficient value, based on the time-series data. The image generator generates an image of the time-series data using the time-series data and the sensitivity distribution.
    Type: Grant
    Filed: October 14, 2014
    Date of Patent: April 30, 2019
    Assignee: TOSHIBA MEDICAL SYSTEMS CORPORATION
    Inventor: Hidenori Takeshima
  • Patent number: 10267876
    Abstract: A magnetic resonance apparatus has a scanner with a superconducting basic field magnet, a gradient coil unit, and a radio-frequency antenna unit, an electronics unit, and a cooling apparatus. The cooling apparatus has a cryostat for cooling the superconducting basic field magnet and a first cooling circuit for cooling the electronics unit and/or the gradient coil unit and/or the radio-frequency antenna unit, and a second cooling circuit for cooling the cryostat.
    Type: Grant
    Filed: September 28, 2015
    Date of Patent: April 23, 2019
    Assignee: Siemens Aktiengesellschaft
    Inventor: Ludwig Kreischer
  • Patent number: 10261036
    Abstract: A sensing system for monitoring an industrial fluid is presented. The sensing system includes a housing and a sensor probe disposed at least partially in the housing, where the sensor probe includes a substrate, a sensing region disposed on the substrate, a first coil disposed on the substrate and coupled to the sensing region, and a second coil disposed on the substrate and coupled to the first coil. A method for operating the sensing system is also presented.
    Type: Grant
    Filed: June 21, 2016
    Date of Patent: April 16, 2019
    Assignee: General Electric Company
    Inventors: Radislav Alexandrovich Potyrailo, Steven YueHin Go
  • Patent number: 10247794
    Abstract: A magnetic field monitoring probe includes a first container having a sample configured to emit a magnetic resonance (MR) signal included therein; a radio frequency (RF) coil inserted into the first container and configured to receive an MR signal emitted from the sample; and a second container surrounding the first container and having a matching liquid injected thereinto.
    Type: Grant
    Filed: March 17, 2017
    Date of Patent: April 2, 2019
    Assignees: SAMSUNG ELECTRONICS CO., LTD., UNIVERSITY-INDUSTRY COOPERATION GROUP OF KYUNG HEE UNIVERSITY
    Inventors: Young Tae Kim, Eric Michel, Soo Yeol Lee
  • Patent number: 10209329
    Abstract: An NMR analysis device, method and probe, including a frame, a sample-holder (12) comprising a rotor (31), suitable for receiving a sample of material (15) to be analyzed, a bearing (13) for rotationally guiding the sample-holder (12) relative to the frame, a turbine (14) kinematically linked with the rotor, the turbine having a geometry such that it allows an isentropic expansion of a third fluid (M3) which passes through it, and a fourth element for channeling (24, 23) a fourth gaseous flow (M4) of fluid downstream of the expansion turbine (14) or for channeling a sixth gaseous flow (M6) of fluid downstream of the rotor (31) and stator (30) of the sample-holder (12).
    Type: Grant
    Filed: December 27, 2013
    Date of Patent: February 19, 2019
    Assignee: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALGERNATIVES
    Inventors: Eric Bouleau, Gaël De Paëpe
  • Patent number: 10201313
    Abstract: A magnetic resonance imaging system configured for generating a three-dimensional representation of at least one breast of a patient includes: a device configured for generating a homogeneous magnetic field; a system of active gradient coils configured for generating at least one magnetic field gradient within a measurement volume; at least one breast holder having an internal space configured for positioning the at least one breast during an MRI scan within the measurement volume; at least one local coil system that includes at least one individual coil, the at least one individual coil configured to act as an antenna for receiving magnetic resonance signals; and at least one cushion configured for stabilizing the at least one breast by filling the internal space between the at least one breast and an external boundary of the internal space.
    Type: Grant
    Filed: December 30, 2014
    Date of Patent: February 12, 2019
    Assignee: Siemens Aktiengesellschaft
    Inventor: Robert Rehner
  • Patent number: 10188313
    Abstract: A magnetic resonance imaging apparatus is provided. The apparatus includes a plurality of receiving antennas for receiving a plurality of reception signals. The apparatus also includes at least one first superposition device having at least one first and one second output, which in each case serve for providing a mode formed by superposition of at least two of the reception signals. The apparatus also includes at least one first frequency division multiplex device for transmitting input signal present at a first and a second input of the frequency division multiplex device via a first transmission link on different frequency bands to a receiving unit, wherein the first output of the first superposition device is connected to the first input of the first frequency division multiplex device and the second output of the first superposition device is connected directly or indirectly to a second transmission link.
    Type: Grant
    Filed: February 11, 2015
    Date of Patent: January 29, 2019
    Assignee: Siemens Aktiengesellschaft
    Inventor: Stephan Biber
  • Patent number: 10187102
    Abstract: Embodiments of the present disclosure disclose a radio remote unit, a receiver, and a base station. The radio remote unit includes at least one receive channel pair, a first local oscillator module, a second local oscillator module, a local oscillator switching switch, and a controller. Each receive channel pair includes a first receive channel and a second receive channel. Each receive channel in each receive channel pair includes a filtering module, a frequency mixing module connected to the filtering module, and a digital processing module connected to the frequency mixing module. A frequency mixing module on the second receive channel is connected to the first local oscillator module and the second local oscillator module by the local oscillator switching switch. The controller is configured to receive an operating mode that is sent by a base station, and control the local oscillator switching switch to perform switching.
    Type: Grant
    Filed: February 14, 2018
    Date of Patent: January 22, 2019
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Haizheng Tang, Xiaomin Zhou
  • Patent number: 10185006
    Abstract: Systems, methods and devices are configured for integrated parallel reception, excitation, and shimming (iPRES) with RF coil elements with split DC loops. Parallel transmit/receive (which can include B1 shimming and/or parallel imaging capabilities) and B0 shimming employ the same set of localized coils or transverse electromagnetic (TEM) coil elements, with each coil or TEM element working in both an RF mode (for transmit/receive and B1 shimming) and a direct current (DC) mode (for B0 shimming) simultaneously. Both an RF and a DC current (in split DC loops) can flow in the same coil element simultaneously but independently with no electromagnetic interference between the two modes.
    Type: Grant
    Filed: December 28, 2017
    Date of Patent: January 22, 2019
    Assignee: Duke University
    Inventors: Dean Darnell, Trong-Kha Truong, Allen W. Song
  • Patent number: 10185001
    Abstract: Systems, methods and devices are configured for integrated parallel reception, excitation, and shimming (iPRES). Parallel transmit/receive (which can include B1 shimming and/or parallel imaging capabilities) and B0 shimming employ the same set of localized coils or transverse electromagnetic (TEM) coil elements, with each coil or TEM element working in both an RF mode (for transmit/receive and B1 shimming) and a direct current (DC) mode (for B0 shimming) simultaneously. Both an RF and a DC current can flow in the same coil simultaneously but independently with no electromagnetic interference between the two modes. This invention is not only applicable when the same coil array is used for parallel transmit, receive and shim, but also when two separate coil arrays are used. In that case, the B0 shimming capability can be integrated into one of the coil arrays (i.e. a transmit array with B1 shimming capability or a receive array), thereby increasing the flexibility and practical utility of the iPRES technology.
    Type: Grant
    Filed: December 12, 2017
    Date of Patent: January 22, 2019
    Assignee: Duke University
    Inventors: Hui Han, Trong-Kha Truong, Allen W. Song
  • Patent number: 10185002
    Abstract: A continuous common mode trap assembly includes a central conductor and plural common mode traps. The central conductor has a length, and is configured to transmit a signal between a magnetic resonance imaging (MRI) receive coil and at least one processor of an MRI system. The plural common mode traps extend along at least a portion of the length of the central conductor. The common mode traps are disposed contiguously. The common mode traps are configured to provide an impedance to reduce transmitter driven currents of the MRI system.
    Type: Grant
    Filed: June 4, 2015
    Date of Patent: January 22, 2019
    Assignee: GENERAL ELECTRIC COMPANY
    Inventors: Robert Steven Stormont, Scott Allen Lindsay
  • Patent number: 10178983
    Abstract: Apparatuses and a method are provided for transmitting signals in a medical imaging system. The method includes transmitting signals wirelessly between at least one receive facility and a facility of the imaging system via a radio network.
    Type: Grant
    Filed: December 19, 2015
    Date of Patent: January 15, 2019
    Assignee: Siemens Aktiengesellschaft
    Inventor: Nikolaus Demharter
  • Patent number: 10175315
    Abstract: A superconducting magnet assembly includes a cryostat, a vacuum vessel and a refrigeration stage. An NMR probe using the assembly includes comprises cooled probe components, a two-stage cryocooler, and a counter flow heat exchanger. A cooling circuit guides coolant from one outlet of the counter flow heat exchanger back to an inlet of the counter flow heat exchanger via the second cooling stage, a cooled probe component, and a heat exchanger in the cryostat or a heat exchanger in a helium suspension tube. Both the intake temperature of the coolant flowing into the heat exchanger in the cryostat or in the suspension tube and the return flow temperature of the emerging coolant are at least 5 K lower than the operating temperature of the first cooling stage. Excess cooling capacity of the cryocooler reduces the evaporation rate of liquid helium or cools a superconducting magnet in a cryogen-free cryostat.
    Type: Grant
    Filed: August 9, 2017
    Date of Patent: January 8, 2019
    Assignee: Bruker BioSpin AG
    Inventors: Joerg Hinderer, Robert Schauwecker
  • Patent number: 10175318
    Abstract: An arrangement for carrying out dynamic magnetic field measurements in a MR imaging or MR spectroscopy apparatus comprises at least one magnetic field probe (2) comprising a MR active substance (4), means (8, 10) for pulsed MR excitation of said substance and means (8, 10) for receiving an MR signal generated by said substance. The magnetic field probe further comprises a radio frequency shield (12) against external high-frequency electromagnetic field irradiation substantially surrounding the magnetic field probe. The shield is composed of conductive elements embedded in a dielectric material. The conductive elements are electrically conductive filaments and/or electrically conductive platelets.
    Type: Grant
    Filed: September 13, 2013
    Date of Patent: January 8, 2019
    Assignee: Skope Magnetic Resonance Technologies GMBH
    Inventor: Thomas Schmid
  • Patent number: 10168399
    Abstract: The embodiments relate to a method and field probes for measuring a static and/or in particular a dynamic magnetic field in an imaging magnetic resonance tomography system, wherein the field probe includes a body surrounded by a coil. The coil includes a middle or center winding section and at least one or two outer winding sections.
    Type: Grant
    Filed: January 15, 2016
    Date of Patent: January 1, 2019
    Assignee: Siemens Aktiengesellschaft
    Inventors: Robert Rehner, Markus Vester
  • Patent number: 10162024
    Abstract: An MR device has at least one distribution network for distributing an electrical input signal (to a number of feeding points of an MR antenna. The distribution network has at least one first signal output and one second signal output connected to a node, a first phase-shifting element disposed between the node and the first signal output, and a second phase-shifting element disposed between the node and the second signal output. The first phase-shifting element and the second phase-shifting element create a different phase shift, and the first phase-shifting element and the second phase-shifting element are embodied as electrical lines of different length. The distribution network is applicable, for example, to feeding signals to a body coil of the MR device, especially a so-called birdcage antenna.
    Type: Grant
    Filed: February 9, 2016
    Date of Patent: December 25, 2018
    Assignee: Siemens Aktiengesellschaft
    Inventors: Ludwig Eberler, Jürgen Nistler
  • Patent number: 10156616
    Abstract: The present invention provides an RF shimming method for a nuclear magnetic resonance imaging apparatus comprising: a transmission coil having a plurality of channels that respectively transmit high frequencies to an object and a calculation unit performing RF shimming calculation that determines at least one of amplitudes and phases of the high frequencies to be transmitted respectively to a plurality of the channels so as to improve homogeneity of a high-frequency magnetic field distribution generated by the transmission coil and reduce a specific absorption ratio of the object. Objective function parameters for setting the objective function are determined according to contribution to the SAR for each of the channels during the RF shimming calculation based on the objective function and the restriction condition.
    Type: Grant
    Filed: March 25, 2015
    Date of Patent: December 18, 2018
    Assignee: HITACHI, LTD.
    Inventor: Kosuke Ito
  • Patent number: 10126389
    Abstract: The present invention provides a gradient coil assembly (122) for use in a magnetic resonance imaging system (110) comprising a set of inner coils (142) and a set of outer coils (144), which are concentrically arranged in respect to a common rotational axis of the set of inner and outer coils (142, 144), wherein the set of inner coils (142) and a set of outer coils (144) can be controlled to generate gradient magnetic fields within an inner space of the gradient coil assembly (122), and at least one coil (152, 154, 156) of the set of outer coils (144) is at least partially made of aluminum. The present invention further provides a magnetic resonance (MR) imaging system (110) comprising the above magnetic gradient coil assembly (122).
    Type: Grant
    Filed: March 21, 2014
    Date of Patent: November 13, 2018
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventor: Cornelis Leonardus Gerardus Ham
  • Patent number: 10114089
    Abstract: A sample tube is arranged in a sample temperature adjusting pipe, and a temperature adjustment gas is supplied. A vacuum vessel is formed with the sample temperature adjusting pipe and an outer wall body, and a detection coil and the like to be placed in a cooling state are arranged in the vacuum vessel. A sealed section between the sample temperature adjusting pipe and the outer wall body is sealed by a sealing structure. The sealing structure includes a high-vacuum O-ring and a low-temperature O-ring. The high-vacuum O-ring has characteristics for sealing the sealed section in a regular temperature region. The regular temperature region is a temperature region excluding a low temperature region, and the low temperature region is a temperature region including a lower limit in a possible temperature adjustment range of the temperature adjustment gas. The low-temperature O-ring has characteristics for sealing the sealed section in the low temperature region.
    Type: Grant
    Filed: January 11, 2017
    Date of Patent: October 30, 2018
    Assignee: JEOL Ltd.
    Inventors: Katsuyuki Toshima, Shinji Nakamura, Shigenori Tsuji
  • Patent number: 10104778
    Abstract: A flexible printed circuit board structure includes a spiral flexible printed circuit board and a protection cover capable of providing functions of extensibility and retractility. The spiral flexible printed circuit board includes a flexible substrate curling up spirally, a patterned circuit layer and a plurality of electrical contacts. The patterned circuit layer is disposed on the flexible substrate. The electrical contacts are disposed on an end of the flexible substrate and electrically connected to the patterned circuit layer. The protection cover at least covers a part of the spiral flexible printed circuit board.
    Type: Grant
    Filed: February 21, 2017
    Date of Patent: October 16, 2018
    Assignee: UNIFLEX Technology Inc.
    Inventors: Yi-Chun Liu, Pei-Hao Hung, Wen-Chien Hsu, Meng-Huan Chia, Min-Ming Tsai, Shan-Yi Tseng, Yuan-Chih Lee
  • Patent number: 10088543
    Abstract: The invention relates to a method of MR imaging of an object (10) placed in an examination volume of a MR device (1). The method comprises the steps of: —subjecting the object (10) to an imaging sequence comprising phase-modulated multi-slice RF pulses for simultaneously exciting two or more spatially separate image slices, —acquiring MR signals, wherein the MR signals are received in parallel via a set of at least two RF coils (11, 12, 13) having different spatial sensitivity profiles within the examination volume, and —reconstructing a MR image for each image slice from the acquired MR signals, wherein MR signal contributions from the different image slices are separated on the basis of the spatial sensitivity profiles of the at least two RF coils (11, 12, 13) and on the basis of the phase modulation scheme of the RF pulses.
    Type: Grant
    Filed: March 11, 2014
    Date of Patent: October 2, 2018
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: Peter Bornert, Mariya Ivanova Doneva, Kay Nehrke
  • Patent number: 10067202
    Abstract: A magnetic resonance imaging apparatus includes a static magnetic field magnet and a gradient coil. The static magnetic field magnet generates a static magnetic field. The gradient coil is provided on an inside of the static magnetic field magnet and includes an X coil, a Y coil and a Z coil. The X coil generates a gradient magnetic field along a horizontal axis of a substantially circular cylinder, the horizontal axis being perpendicular to a long axis. The Y coil generates a gradient magnetic field along a vertical axis of the substantially circular cylinder. The Z coil generates a gradient magnetic field along the long axis of the substantially circular cylinder. In the gradient coil, coils are laminated in such a manner that the X coil is positioned more distant from a magnetic field center than the Y coil is.
    Type: Grant
    Filed: August 31, 2015
    Date of Patent: September 4, 2018
    Assignee: TOSHIBA MEDICAL SYSTEMS CORPORATION
    Inventor: Yoshitomo Sakakura
  • Patent number: 10057642
    Abstract: Systems and methods are described herein for provisioning power to a power consumption device in a depowered state (e.g., a device not consuming current such as standby current). Aspects discussed herein relate to controlling a detector, switches, and/or an outlet such as a smart outlet. In some examples, a message may be sent to a powered controller. The controller may be configured to send a signal to activate a detector, which may be sent via a wireless signal and/or via generation of a resonance frequency via a tuned circuit (e.g., via resonant coupling). The signal may include “bootstrap” power that enables the detector to activate a switch to receive power from an additional or alternative power source. The detector may further receive and decode the signal to operate one or more outlets or switches, gates, relays, thyristors, transistors, or so on to provide power to a power-consumption device.
    Type: Grant
    Filed: October 6, 2015
    Date of Patent: August 21, 2018
    Assignee: Comcast Cable Communications, LLC
    Inventor: Tsung-Hsiang Hsueh
  • Patent number: 10048342
    Abstract: An apparatus, a magnetic resonance imaging system, and a method of use are provided for a reception system for transmitting magnetic resonance signals from local coils to an image processing unit of a magnetic resonance imaging system. The apparatus includes an analog receiver for receiving and processing analog signals from the local coils that is configured to directly sample analog signals having different individual frequency bands and/or frequency band pairs, to distinguish the analog signals and to process them differently. The apparatus also includes an A/D converter for converting the processed analog signals from the local coils into digital signals. The apparatus further includes a digital signal processor for processing the digital signals, wherein the digital signal processor includes a Weaver unit and a downstream decimation filter unit.
    Type: Grant
    Filed: March 27, 2015
    Date of Patent: August 14, 2018
    Assignee: Siemens Aktiengesellschaft
    Inventor: Jan Bollenbeck
  • Patent number: 10042013
    Abstract: An active position marker system comprising at least one active position marker (10) and a remote transceiver unit (20) for communicating with the position marker is disclosed. Basically, the position marker (10) comprises a local RF receive coil (11) for receiving MR signals which are excited in a local volume, and a parametric amplifier (14) for amplifying and upconverting the frequency of the received MR signal into at least one microwave sideband frequency signal. This microwave signal is transmitted wirelessly or wire-bound to the transceiver unit for downconverting the same and supplying it to an image processing unit of an MR imaging apparatus.
    Type: Grant
    Filed: February 1, 2013
    Date of Patent: August 7, 2018
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: Oliver Lips, Sascha Krueger, Marinus Johannes Adrianus Maria Van Helvoort
  • Patent number: 10036794
    Abstract: A patient couch for a magnetic resonance tomography system and a magnetic resonance tomography system are provided. The patient couch includes a feed facility for radiofrequency energy having a plurality of conduction paths for feeding radiofrequency energy. The patient couch also includes a plurality of plug-in connectors for local coils having a transmit coil, and a distribution structure for the distribution of radiofrequency energy from the feed facility to the plug-in connectors.
    Type: Grant
    Filed: June 30, 2017
    Date of Patent: July 31, 2018
    Assignee: Siemens Healthcare GmbH
    Inventors: Ralph Kimmlingen, Norbert Rietsch
  • Patent number: 10001534
    Abstract: According to one embodiment, an MRI apparatus includes a first radio communication unit, a second radio communication unit and an image reconstruction unit. The first radio communication unit includes a connecting unit detachably connected to an RF coil device which detects a nuclear magnetic resonance signal emitted from an object. The first radio communication unit acquires the nuclear magnetic resonance signal detected by the RF coil device via the connecting unit, and wirelessly transmits the acquired nuclear magnetic resonance signal. The second radio communication unit receives the nuclear magnetic resonance signal wirelessly transmitted from the first radio communication unit. The image reconstruction unit acquires the nuclear magnetic resonance signal received by the second radio communication unit, and reconstructs image data of the object based on the nuclear magnetic resonance signal.
    Type: Grant
    Filed: October 3, 2013
    Date of Patent: June 19, 2018
    Assignee: TOSHIBA MEDICAL SYSTEMS CORPORATION
    Inventor: Kazuya Okamoto
  • Patent number: 9983280
    Abstract: A local coil for an MRI system includes a signal antenna to receive a magnetic resonance signal and a tuning/detuning circuit to subject the signal antenna part to switch control according to a control signal. The tuning/detuning circuit is connected to the signal antenna part. The tuning/detuning circuit includes a control signal interface, a resonant circuit and an AC/DC conversion circuit. The control signal interface receives the control signal. The resonant circuit includes a diode. The AC/DC conversion circuit converts an alternating current generated by an electromagnetic wave to a direct current. The AC/DC conversion circuit is connected in series with the diode. A small detuning control current may be used, and detuning control circuitry may be reduced.
    Type: Grant
    Filed: April 10, 2014
    Date of Patent: May 29, 2018
    Assignee: Siemens Aktiengesellschaft
    Inventors: Jia Heng Tan, Tong Tong, Markus Vester, JianMin Wang
  • Patent number: 9977110
    Abstract: In this disclosure, a process of imaging a target object using magnetic resonance (MR) includes an MRI scanner scanning the target object using a first transmit RF pulse. A processor associated with the MRI scanner can acquire magnitude and/or phase data associated with a first RF signal produced (or echoed) by the target object responsive to the MRI scan. The processor can determine a second transmit RF pulse for use to scan the target object based on the acquired data and according to a given phase criterion. The phase criterion can be configured to enforce mitigation of a phase distribution estimated based on the acquired data.
    Type: Grant
    Filed: May 8, 2015
    Date of Patent: May 22, 2018
    Assignee: Magnetic Resonance Innovations, Inc.
    Inventors: E. Mark Haacke, Wei Feng
  • Patent number: 9971002
    Abstract: A local coil and a magnetic resonance imaging system are provided. The local coil includes an antenna part, an adjustment part and a transmission part. The antenna part includes a first capacitor connected in series for adjusting a frequency of the antenna part. The adjustment part includes a tuning/detuning diode and is connected in parallel to the first capacitor, and the tuning/detuning diode is used for adjusting tuning and detuning of the antenna part. The transmission part includes a radio-frequency transmission line that connects the antenna part and the adjustment part, and the transmission part provides a phase difference of an odd multiple of 180° between the antenna part and the tuning/detuning diode.
    Type: Grant
    Filed: January 29, 2014
    Date of Patent: May 15, 2018
    Assignee: Siemens Aktiengesellschaft
    Inventors: Wen Ming Li, Tong Tong, JianMin Wang
  • Patent number: 9958516
    Abstract: A biological detector includes a conduit for receiving a fluid containing one or more magnetic nanoparticle-labeled, biological objects to be detected and one or more permanent magnets or electromagnet for establishing a low magnetic field in which the conduit is disposed. A microcoil is disposed proximate the conduit for energization at a frequency that permits detection by NMR spectroscopy of whether the one or more magnetically-labeled biological objects is/are present in the fluid.
    Type: Grant
    Filed: March 26, 2014
    Date of Patent: May 1, 2018
    Assignees: ABQMR, Inc., Sandia Corporation, STC.UNM
    Inventors: Laurel Sillerud, Todd M. Alam, Andrew F. McDowell
  • Patent number: 9927506
    Abstract: 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.
    Type: Grant
    Filed: January 9, 2014
    Date of Patent: March 27, 2018
    Assignee: Siemens Aktiengesellschaft
    Inventors: Hong Cheng, Stefan Pott, JianMin Wang, Lan Wang
  • Patent number: 9921278
    Abstract: A superconducting magnet assembly includes a cryostat, a vacuum vessel and a refrigeration stage. An NMR probe using the assembly includes comprises cooled probe components, a two-stage cryocooler, and a counter flow heat exchanger. A cooling circuit guides coolant from one outlet of the counter flow heat exchanger back to an inlet of the counter flow heat exchanger via the second cooling stage, a cooled probe component, and a heat exchanger in the cryostat or a heat exchanger in a helium suspension tube. Both the intake temperature of the coolant flowing into the heat exchanger in the cryostat or in the suspension tube and the return flow temperature of the emerging coolant are at least 5 K lower than the operating temperature of the first cooling stage. Excess cooling capacity of the cryocooler reduces the evaporation rate of liquid helium or cools a superconducting magnet in a cryogen-free cryostat.
    Type: Grant
    Filed: August 9, 2017
    Date of Patent: March 20, 2018
    Assignee: Bruker BioSpin AG
    Inventors: Joerg Hinderer, Robert Schauwecker
  • Patent number: 9910113
    Abstract: A local coil for a magnetic resonance imaging system for acquisition of magnetic resonance signals includes a receiving mechanism for wireless transmission of operating energy of the local coil and/or a signal of the magnetic resonance imaging system. The receiving mechanism is configured to take the operating energy and/or the signal from a supply field. A magnetic resonance imaging system is also provided. The magnetic resonance imaging system includes a transmitting mechanism for wireless transmission of operating energy of a local coil and/or a signal of the magnetic resonance imaging system. The transmitting mechanism has a transmission signal generator that is connected to a field source and a field sink. The transmitting mechanism is constructed such that, in operation, the operating energy and/or the signal is transmitted by a supply field that is present as an electrical alternating voltage field between the field source and the field sink.
    Type: Grant
    Filed: June 20, 2013
    Date of Patent: March 6, 2018
    Assignee: Siemens Aktiengesellschaft
    Inventor: Markus Vester
  • Patent number: 9906049
    Abstract: A contactless power supply has a dynamically configurable tank circuit powered by an inverter. The contactless power supply is inductively coupled to one or more loads. The inverter is connected to a DC power source. When loads are added or removed from the system, the contactless power supply is capable of modifying the resonant frequency of the tank circuit, the inverter frequency, the inverter duty cycle or the rail voltage of the DC power source.
    Type: Grant
    Filed: January 18, 2016
    Date of Patent: February 27, 2018
    Inventor: David W. Baarman
  • Patent number: 9897672
    Abstract: The present invention relates to a power supply system (311) for supplying current to a gradient coil (303) of a magnetic resonance imaging system (100), the power supply system (311) comprising: an electrical power supply (309) to supply a first voltage to a gradient amplifier (307) for driving the gradient coil, the gradient amplifier output being connected to the gradient coil (303); an energy buffer having an input connected to the electrical power supply (309), the energy buffer being configured to supply second voltage to the gradient amplifier (307), the energy buffer being in parallel to the gradient amplifier (307) and the electrical power supply (309), the energy buffer comprising a voltage converter (313) configured to control the second voltage as to compensate for a variation in the first voltage resulting from the driving of the gradient coil (303).
    Type: Grant
    Filed: April 4, 2013
    Date of Patent: February 20, 2018
    Assignee: KONINKLIJKE PHILIPS ELECTRONICS N.V.
    Inventors: Engenio Johannes Franciscus Maria Smits, Martin Alexander Hollander, Johannes Paulus Schoonderbeek
  • Patent number: 9880242
    Abstract: Systems, methods and devices are configured for integrated parallel reception, excitation, and shimming (iPRES) with RF coil elements with split DC loops. Parallel transmit/receive (which can include B1 shimming and/or parallel imaging capabilities) and B0 shimming employ the same set of localized coils or transverse electromagnetic (TEM) coil elements, with each coil or TEM element working in both an RF mode (for transmit/receive and B1 shimming) and a direct current (DC) mode (for B0 shimming) simultaneously. Both an RF and a DC current (in split DC loops) can flow in the same coil element simultaneously but independently with no electromagnetic interference between the two modes.
    Type: Grant
    Filed: October 13, 2015
    Date of Patent: January 30, 2018
    Assignee: Duke University
    Inventors: Dean Darnell, Trong-Kha Truong, Allen W. Song
  • Patent number: 9874616
    Abstract: Systems, methods and devices are configured for integrated parallel reception, excitation, and shimming (iPRES). Parallel transmit/receive (which can include B?1#191 shimming and/or parallel imaging capabilities) and B1 shimming employ the same set of localized coils or transverse electromagnetic (TEM) coil elements, with each coil or TEM element working in both an RF mode (for transmit/receive and B1 shimming) and a direct current (DC) mode (for B0 shimming) simultaneously. Both an RF and a DC current can flow in the same coil simultaneously but independently with no electromagnetic interference between the two modes. This invention is not only applicable when the same coil array is used for parallel transmit, receive and shim, but also when two separate coil arrays are used. In that case, the B0 shimming capability can be integrated into one of the coil arrays (i.e.
    Type: Grant
    Filed: May 21, 2013
    Date of Patent: January 23, 2018
    Assignee: Duke University
    Inventors: Hui Han, Trong-Kha Truong, Allen W. Song
  • Patent number: 9876436
    Abstract: A switching power supply apparatus of a current-resonance type, including a first switching element and a second switching element connected in series, a series circuit of a resonant reactor and a resonant capacitor connected in parallel to the first switching element or the second switching element, a control circuit configured to alternately turn on and off the first switching element and the second switching element, and a load detection circuit. The load detection circuit includes a shunt circuit which shunts a resonant current flowing through the resonant reactor and resonant capacitor connected in series to obtain a shunted current, converts the shunted current to a first voltage signal, and outputs the first voltage signal, a switching circuit which switches between the first voltage signal and a second voltage signal of a ground level to generate a third voltage signal, and an averaging circuit which averages the third voltage signal.
    Type: Grant
    Filed: December 30, 2016
    Date of Patent: January 23, 2018
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventor: Jian Chen
  • Patent number: 9874617
    Abstract: A power supply unit (130) powers at least one gradient coil (128) of a magnetic resonance (MR) examination system (110) with a main magnet (114) having, in at least one state of operation, a substantially static magnetic field strength, and with an MR measurement signal bandwidth. The power supply unit (130) includes a switched-mode power converter (134) for powering the at least one gradient coil (128), and including at least one switching member provided to switch between a conducting state configuration and an essentially non-conducting state configuration at a first fundamental switching frequency (fSW). A pulse control unit (132) is designed to provide switching pulses at the first fundamental switching frequency (fSW) for controlling the switching of the at least one switching member. Upon triggering by a trigger signal (142), the pulse control unit (132) is provided to change the first fundamental switching frequency (fSW) to at least a second fundamental switching frequency (fSW).
    Type: Grant
    Filed: May 14, 2013
    Date of Patent: January 23, 2018
    Assignee: Koninklijke Philips N.V.
    Inventors: Cornelis Leonardus Gerardus Ham, Martin Alexander Hollander, Marinus Johannes Adrianus Maria Van Helvoort, Michael Paul Bax
  • Patent number: 9864025
    Abstract: MRI systems with a new concept and hardware modality configured for parallel transmit, receive, and shim to address B0 and B1 inhomogeneity, both of which increase with field strength. This invention benefits from a number of advantages over existing technologies: it can save valuable space within the MRI magnet bore, largely reduce the manufacturing cost of MRI scanners, and avoid the electromagnetic interference issue associated with existing technologies.
    Type: Grant
    Filed: May 21, 2013
    Date of Patent: January 9, 2018
    Assignee: Duke University
    Inventors: Hui Han, Trong-Kha Truong, Allen W. Song
  • Patent number: 9829550
    Abstract: A system includes a multi-nuclear magnetic resonance (MR) receiving coil, wherein the receiving coil includes a frequency tuning component configured operate the receiving coil at either a first frequency or a second frequency. The receiving coil also includes an impedance matching component configured to maintain a substantially constant impedance of the receiving coil when the receiving coil is operated at either the first frequency or the second frequency. Furthermore, the receiving coil is configured to measure a first nucleus when operated at the first frequency, and wherein the receiving coil is configured to measure a second nucleus when operated at the second frequency.
    Type: Grant
    Filed: December 27, 2012
    Date of Patent: November 28, 2017
    Assignee: General Electric Company
    Inventors: Selaka Bandara Bulumulla, Joseph Alfred Iannotti, Eric William Fiveland, Fraser Robb