Patents by Inventor Yoshinori Hamamura

Yoshinori Hamamura has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20220236351
    Abstract: Some radio-frequency coils comprise three or more electrical conductors that form a radio-frequency coil element. Each of the three or more electrical conductors extends along at least a respective part of a length of the radio-frequency coil element, and, along the length of the radio-frequency coil element, the three or more electrical conductors are separated from each other by respective distances and by one or more dielectric materials.
    Type: Application
    Filed: April 12, 2022
    Publication date: July 28, 2022
    Inventors: Yiping Guan, Yoshinori Hamamura
  • Patent number: 11327131
    Abstract: Some radio-frequency coils comprise three or more electrical conductors that form a radio-frequency coil element. Each of the three or more electrical conductors extends along at least a respective part of a length of the radio-frequency coil element, and, along the length of the radio-frequency coil element, the three or more electrical conductors are separated from each other by respective distances and by one or more dielectric materials.
    Type: Grant
    Filed: May 12, 2020
    Date of Patent: May 10, 2022
    Assignee: CANON MEDICAL SYSTEMS CORPORATION
    Inventors: Yiping Guan, Yoshinori Hamamura
  • Patent number: 11255934
    Abstract: A magnetic resonance RF receive coil with non-conductive waveguides for data transfer between the RF coil antennas and the channel aggregator is described. The non-conductive waveguide for each channel includes a plastic waveguide transferring data between a millimeter wave transmitter and a millimeter wave receiver.
    Type: Grant
    Filed: April 24, 2020
    Date of Patent: February 22, 2022
    Assignee: CANON MEDICAL SYSTEMS CORPORATION
    Inventors: Mark Spring, Yoshinori Hamamura, Ernie Zepeda
  • Publication number: 20210356541
    Abstract: Some radio-frequency coils comprise three or more electrical conductors that form a radio-frequency coil element. Each of the three or more electrical conductors extends along at least a respective part of a length of the radio-frequency coil element, and, along the length of the radio-frequency coil element, the three or more electrical conductors are separated from each other by respective distances and by one or more dielectric materials.
    Type: Application
    Filed: May 12, 2020
    Publication date: November 18, 2021
    Inventors: Yiping Guan, Yoshinori Hamamura
  • Publication number: 20210333340
    Abstract: A magnetic resonance RF receive coil with non-conductive waveguides for data transfer between the RF coil antennas and the channel aggregator is described. The non-conductive waveguide for each channel includes a plastic waveguide transferring data between a millimeter wave transmitter and a millimeter wave receiver.
    Type: Application
    Filed: April 24, 2020
    Publication date: October 28, 2021
    Inventors: Mark SPRING, Yoshinori Hamamura, Ernie Zepeda
  • Patent number: 11112470
    Abstract: According to one embodiment, a magnetic resonance imaging apparatus includes data acquisition circuitry configured to generate magnetic resonance data; a digital encoder connected to receive the magnetic resonance data and configured to digitally encode the magnetic resonance data using an encoding scheme having a spectral null approximately at the Larmor frequency; and an electric data transmission line connected to transmit the digitally encoded magnetic resonance data.
    Type: Grant
    Filed: April 27, 2020
    Date of Patent: September 7, 2021
    Assignee: CANON MEDICAL SYSTEMS CORPORATION
    Inventors: Yoshinori Hamamura, Mark Spring, Ernie Zepeda
  • Patent number: 9714993
    Abstract: A magnetic resonance imaging (MRI) system includes static and gradient magnetic field generators, at least one radio frequency (RF) coil, at least one RF transmitter and at least one RF receiver. At least one power consumption monitor is coupled to locally measure power consumed by the RF coil. The MRI control system has at least one computer configured to determine a specific absorption rate (SAR) for a patient coupled to the RF coil based on at least: (a) RF power transmitted to said RF coil while the RF coil is inductively coupled to the patient, and (b) an electrical signal output from the at least one power consumption monitor while the RF coil is inductively coupled to the patient.
    Type: Grant
    Filed: January 11, 2013
    Date of Patent: July 25, 2017
    Assignee: TOSHIBA MEDICAL SYSTEMS CORPORATION
    Inventors: Yoshinori Hamamura, Xin Chen
  • Patent number: 9517021
    Abstract: A magnetic resonance imaging (MRI) system, method and/or apparatus is configured to effect MR imaging where data corresponding to MR signals is transmitted from a radio frequency (RF) receive coil to the MRI data processor via a path that includes a near-field wireless communication (NFC) connection. A receiver for the NFC connection is selected from of the one or more wireless signal receivers that are arranged on a restraining belt when the restraining belt is placed, during operation of an MRI system for imaging an object located on a patient table, over at least a portion of the object and the receive RF coil is located between the restraining belt and the object.
    Type: Grant
    Filed: September 23, 2013
    Date of Patent: December 13, 2016
    Assignee: TOSHIBA MEDICAL SYSTEMS CORPORATION
    Inventors: Robert Anderson, Yoshinori Hamamura
  • Patent number: 9519038
    Abstract: According to one embodiment, an MRI apparatus (20) obtains a nuclear magnetic resonance signal from an RF coil device (100) which detects the nuclear magnetic resonance signal emitted from an object (P), and this MRI apparatus (20) includes a first radio communication unit (200), a second radio communication unit (300) and an image reconstruction unit (56). The first radio communication unit (200) obtains the nuclear magnetic resonance signal detected by the RF coil device (100), and wirelessly transmits the nuclear magnetic resonance signal in a digitized state via an induced electric field. The second radio communication unit (300) receives the nuclear magnetic resonance signal wirelessly transmitted from the first radio communication unit (200) via the induced electric field. The image reconstruction unit (56) reconstructs image data of the object (P) based on the nuclear magnetic resonance signal received by the second radio communication unit (300).
    Type: Grant
    Filed: July 18, 2013
    Date of Patent: December 13, 2016
    Assignee: TOSHIBA MEDICAL SYSTEMS CORPORATION
    Inventors: Kazuya Okamoto, Hiromitsu Takamori, Yoshinori Hamamura
  • Patent number: 9366737
    Abstract: An electrically-controlled failsafe switch is included in an MRI transmit-and-receive RF coil assembly so as to protect it from induced RF currents in the event it is disconnected from an MRI system, but inadvertently left linked to strong MRI RF fields during imaging procedures using other RF coils.
    Type: Grant
    Filed: September 11, 2015
    Date of Patent: June 14, 2016
    Assignees: QUALITY ELECTRODYNAMICS, LLC, TOSHIBA MEDICAL SYSTEMS CORPORATION
    Inventors: Yoshinori Hamamura, Xiaoyu Yang, Nicholas Castrilla, Christopher J. Allen, Shinji Mitsui
  • Publication number: 20160033598
    Abstract: An electrically-controlled failsafe switch is included in an MRI transmit-and-receive RF coil assembly so as to protect it from induced RF currents in the event it is disconnected from an MRI system, but inadvertently left linked to strong MRI RF fields during imaging procedures using other RF coils.
    Type: Application
    Filed: September 11, 2015
    Publication date: February 4, 2016
    Inventors: Yoshinori HAMAMURA, Xiaoyu Yang, Nicholas Castrilla, Christopher J. Allen, Shinji Mitsui
  • Patent number: 9157972
    Abstract: An electrically-controlled failsafe switch is included in an MRI transmit-and-receive RF coil assembly so as to protect it from induced RF currents in the event it is disconnected from an MRI system, but inadvertently left linked to strong MRI RF fields during imaging procedures using other RF coils.
    Type: Grant
    Filed: August 15, 2012
    Date of Patent: October 13, 2015
    Assignees: QUALITY ELECTRODYNAMICS, LLC, TOSHIBA MEDICAL SYSTEMS CORPORATION
    Inventors: Yoshinori Hamamura, Xiaoyu Yang, Nicholas Castrilla, Christopher J. Allen, Shinji Mitsui
  • Publication number: 20150087966
    Abstract: A magnetic resonance imaging (MRI) system, method and/or apparatus is configured to effect MR imaging where data corresponding to MR signals is transmitted from a radio frequency (RF) receive coil to the MRI data processor via a path that includes a near-field wireless communication (NFC) connection. A receiver for the NFC connection is selected from of the one or more wireless signal receivers that are arranged on a restraining belt when the restraining belt is placed, during operation of an MRI system for imaging an object located on a patient table, over at least a portion of the object and the receive RF coil is located between the restraining belt and the object.
    Type: Application
    Filed: September 23, 2013
    Publication date: March 26, 2015
    Applicants: TOSHIBA MEDICAL SYSTEMS CORPORATION, KABUSHIKI KAISHA TOSHIBA
    Inventors: ROBERT ANDERSON, Yoshinori Hamamura
  • Publication number: 20140197836
    Abstract: A magnetic resonance imaging (MRI) system includes static and gradient magnetic field generators, at least one radio frequency (RF) coil, at least one RF transmitter and at least one RF receiver. At least one power consumption monitor is coupled to locally measure power consumed by the RF coil. The MRI control system has at least one computer configured to determine a specific absorption rate (SAR) for a patient coupled to the RF coil based on at least: (a) RF power transmitted to said RF coil while the RF coil is inductively coupled to the patient, and (b) an electrical signal output from the at least one power consumption monitor while the RF coil is inductively coupled to the patient.
    Type: Application
    Filed: January 11, 2013
    Publication date: July 17, 2014
    Applicants: TOSHIBA MEDICAL SYSTEMS CORPORATION, KABUSHIKI KAISHA TOSHIBA
    Inventors: YOSHINORI HAMAMURA, XIN CHEN
  • Publication number: 20140021954
    Abstract: According to one embodiment, an MRI apparatus (20) obtains a nuclear magnetic resonance signal from an RF coil device (100) which detects the nuclear magnetic resonance signal emitted from an object (P), and this MRI apparatus (20) includes a first radio communication unit (200), a second radio communication unit (300) and an image reconstruction unit (56). The first radio communication unit (200) obtains the nuclear magnetic resonance signal detected by the RF coil device (100), and wirelessly transmits the nuclear magnetic resonance signal in a digitized state via an induced electric field. The second radio communication unit (300) receives the nuclear magnetic resonance signal wirelessly transmitted from the first radio communication unit (200) via the induced electric field. The image reconstruction unit (56) reconstructs image data of the object (P) based on the nuclear magnetic resonance signal received by the second radio communication unit (300).
    Type: Application
    Filed: July 18, 2013
    Publication date: January 23, 2014
    Inventors: Kazuya OKAMOTO, Hiromitsu TAKAMORI, Yoshinori HAMAMURA
  • Publication number: 20120306499
    Abstract: An electrically-controlled failsafe switch is included in an MRI transmit-and-receive RF coil assembly so as to protect it from induced RF currents in the event it is disconnected from an MRI system, but inadvertently left linked to strong MRI RF fields during imaging procedures using other RF coils.
    Type: Application
    Filed: August 15, 2012
    Publication date: December 6, 2012
    Applicants: TOSHIBA MEDICAL SYSTEMS CORPORATION, QUALITY ELECTRODYNAMICS, LLC
    Inventors: YOSHINORI HAMAMURA, XIAOYU YANG, NICHOLAS CASTRILLA, CHRISTOPHER J. ALLEN, SHINJI MITSUI
  • Patent number: 8269499
    Abstract: An electrically-controlled failsafe switch is included in an MRI transmit-and-receive RF coil assembly so as to protect it from induced RF currents in the event it is disconnected from an MRI system, but inadvertently left linked to strong MRI RF fields during imaging procedures using other RF coils.
    Type: Grant
    Filed: June 1, 2010
    Date of Patent: September 18, 2012
    Assignees: Quality Electrodynamics, LLC, Toshiba Medical Systems Corporation
    Inventors: Yoshinori Hamamura, Xiaoyu Yang, Nicholas Castrilla, Christopher J. Allen, Shinji Mitsui
  • Publication number: 20110291655
    Abstract: An electrically-controlled failsafe switch is included in an MRI transmit-and-receive RF coil assembly so as to protect it from induced RF currents in the event it is disconnected from an MRI system, but inadvertently left linked to strong MRI RF fields during imaging procedures using other RF coils.
    Type: Application
    Filed: June 1, 2010
    Publication date: December 1, 2011
    Applicants: TOSHIBA MEDICAL SYSTEMS CORPORATION, QUALITY ELECTRODYNAMICS, LLC
    Inventors: Yoshinori Hamamura, Xiaoyu Yang, Nicholas Castrilla, Christopher J. Allen, Shinji Mitsui
  • Patent number: 7227361
    Abstract: A magnetic resonance imaging apparatus acquires magnetic resonance signals by the PI method using an RF coil unit having basic coils serving as surface coils which are arrayed with at least two coils along a static magnetic field direction (Z direction) and and at least two coils along each of two orthogonal x, y directions. The coils are divided into an upper unit and a lower unit. The upper unit and lower unit are fixed by a band or the like to allow them to be mounted on an object to be examined. The signals detected by the respective surface coils are sent to a data processing system through independent receiver unit and formed into a magnetic resonance image.
    Type: Grant
    Filed: March 30, 2006
    Date of Patent: June 5, 2007
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Kazuya Okamoto, Yoshinori Hamamura, Yoshio Machida
  • Patent number: 7176689
    Abstract: A magnetic resonance imaging system includes an MR signal reception apparatus comprising a receiving multi-coil and a switchover member. The receiving multi-coil receives MR signals and is composed of a plurality of element coils. The switchover member is configured to switch reception states of the MR signals received by the plurality of element coils in response to imaging conditions. The switchover member connects output paths of the MR signals from the plurality of element coils to a receiver, to reception channels in the receiver in response to the imaging conditions. The reception channels is less in number than the element coils. The imaging conditions are for example directed to parallel MR imaging.
    Type: Grant
    Filed: October 17, 2005
    Date of Patent: February 13, 2007
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yoshio Machida, Yoshinori Hamamura, Yoshimori Kassai, Kazuya Okamoto, Kazuhiro Soma