Patents by Inventor Motohisa Yokoi

Motohisa Yokoi 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: 20210106252
    Abstract: A magnetic resonance imaging apparatus according to an embodiment includes a processor. The processor acquires age information representing the length of time elapsed from the birth of a subject. The processor also outputs a parameter of a pulse sequence for imaging an image of the subject, in a manner suitable for the magnetization relaxation characteristic of the subject, the magnetization relaxation characteristic being based on the acquired age information and relaxation characteristic information. The relaxation characteristic information includes mapping of the age information and the magnetization relaxation characteristic.
    Type: Application
    Filed: October 1, 2020
    Publication date: April 15, 2021
    Applicant: CANON MEDICAL SYSTEMS CORPORATION
    Inventors: Fumiyasu SHINKAI, Motohisa YOKOI, Shinichi UCHIZONO, Kazuhiro SUEOKA, Yutaka MACHII
  • Patent number: 10976392
    Abstract: A gradient coil according to an embodiment is configured to generate gradient magnetic fields along a plurality of axes in an imaging space in which a subject is imaged. The gradient coil includes a coil corresponding to at least one of the plurality of axes, wherein an electrically-conductive member of the coil is formed so as to be partitioned in a thickness direction by a plurality of electrically-insulative layers.
    Type: Grant
    Filed: February 15, 2019
    Date of Patent: April 13, 2021
    Assignee: CANON MEDICAL SYSTEMS CORPORATION
    Inventors: Hidekazu Tanaka, Takuma Kawai, Yoshitomo Sakakura, Motohisa Yokoi
  • Publication number: 20190257901
    Abstract: A gradient coil according to an embodiment is configured to generate gradient magnetic fields along a plurality of axes in an imaging space in which a subject is imaged. The gradient coil includes a coil corresponding to at least one of the plurality of axes, wherein an electrically-conductive member of the coil is formed so as to be partitioned in a thickness direction by a plurality of electrically-insulative layers.
    Type: Application
    Filed: February 15, 2019
    Publication date: August 22, 2019
    Applicant: CANON MEDICAL SYSTEMS CORPORATION
    Inventors: Hidekazu TANAKA, Takuma KAWAI, Yoshitomo SAKAKURA, Motohisa YOKOI
  • Patent number: 10048337
    Abstract: Image diagnosis apparatus (20) generates image data of an object by using external electric power, and includes a charge/discharge element and a charge/discharge control circuit. The charge/discharge element is charged with the external electric power and supplies part of the consumed power of the image diagnosis apparatus by discharging. The charge/discharge control circuit controls charge and discharge of the charge/discharge element in such a manner that the charge/discharge element discharges in a period during which the consumed power is larger than a predetermined power amount and the charge/discharge element is charged in a period during which the consumed power is smaller than the predetermined power amount.
    Type: Grant
    Filed: October 31, 2013
    Date of Patent: August 14, 2018
    Assignee: TOSHIBA MEDICAL SYSTEMS CORPORATION
    Inventors: Motohisa Yokoi, Motohiro Miura, Sho Kawajiri, Kazuyuki Soejima, Haruki Nakamura, Naoki Imamura
  • Patent number: 9989602
    Abstract: An MRI apparatus includes a data acquisition system, a charge/discharge element and a power control unit. The data acquisition system acquires nuclear magnetic resonance signals from an imaging region by performing a scan. The charge/discharge element is a part of an electric power system of the MRI apparatus, and is charged with external electric power. The power control unit controls the electric power system in such a manner that at least one unit excluding the data acquisition system is supplied with electric power from the charge/discharge element.
    Type: Grant
    Filed: October 31, 2013
    Date of Patent: June 5, 2018
    Assignee: TOSHIBA MEDICAL SYSTEMS CORPORATION
    Inventors: Naoki Imamura, Motohisa Yokoi, Kazuyuki Soejima, Motohiro Miura, Sho Kawajiri, Haruki Nakamura
  • Patent number: 9910119
    Abstract: A magnetic resonance imaging (MR) apparatus includes a mode switching part and an imaging system. The mode switching part is configured to put a circuit system consuming power into a shutdown state when a first trigger has been detected and to put the circuit system back into a startup state when a second trigger has been detected. The first trigger shows that MR imaging does not start for a certain period. The second trigger shows that MR imaging starts. The imaging system is configured to perform MR imaging by using the circuit system after being set to the startup state.
    Type: Grant
    Filed: May 25, 2016
    Date of Patent: March 6, 2018
    Assignee: TOSHIBA MEDICAL SYSTEMS CORPORATION
    Inventors: Motohisa Yokoi, Kanta Kobuchi, Sho Kawajiri, Masaaki Yamanaka, Naoki Imamura, Hitoshi Kanazawa
  • Patent number: 9759790
    Abstract: A magnetic resonance imaging device according to an embodiment includes a gradient amplifier, a battery, a detector, and a battery controller. The gradient amplifier supplies electric power to the gradient coil. The battery is charged with electric power that is supplied from the power supply. The detector detects a high power output request on the gradient amplifier. The battery controller controls to supply electric power charged in the battery in addition to electric power supplied from the power supply to the gradient amplifier when the high power output request is detected.
    Type: Grant
    Filed: June 25, 2014
    Date of Patent: September 12, 2017
    Assignee: TOSHIBA MEDICAL SYSTEMS CORPORATION
    Inventors: Sho Kawajiri, Motohisa Yokoi, Motohiro Miura, Masashi Hori, Kazuyuki Soejima, Naoki Imamura, Haruki Nakamura
  • Patent number: 9726734
    Abstract: An MRI apparatus includes a charge/discharge controlling unit, a judging unit and a condition restricting unit. The charge/discharge controlling unit includes a charge/discharge element, receives electric power, and charges the charge/discharge element by using the received electric power. The charge/discharge controlling unit also supplies a gradient magnetic field coil with electric power discharged from the charge/discharge element at a time of performance of magnetic resonance imaging. The judging unit judges whether capacitance of the charge/discharge element falls below a threshold value or not. The condition restricting unit restricts electric power amount supplied to the gradient magnetic field coil by restricting conditions of an imaging sequence, when the capacitance of the charge/discharge element falls below the threshold value.
    Type: Grant
    Filed: April 16, 2013
    Date of Patent: August 8, 2017
    Assignee: TOSHIBA MEDICAL SYSTEMS CORPORATION
    Inventors: Masashi Hori, Motohiro Miura, Motohisa Yokoi, Sho Kawajiri
  • Publication number: 20160274206
    Abstract: According to one embodiment, a magnetic resonance imaging apparatus includes a mode switching part and an imaging system. The mode switching part is configured to put a circuit system consuming a power into a shutdown state when a first trigger has been detected and put the circuit system being the shutdown state into a startup state when a second trigger has been detected. The first trigger shows that an imaging does not start for a certain period. The second trigger shows that the imaging starts. The imaging system is configured to perform the imaging by using the circuit system being the startup state.
    Type: Application
    Filed: May 25, 2016
    Publication date: September 22, 2016
    Inventors: Motohisa YOKOI, Kanta KOBUCHI, Sho KAWAJIRI, Masaaki YAMANAKA, Naoki IMAMURA, Hitoshi KANAZAWA
  • Patent number: 9383422
    Abstract: According to one embodiment, a magnetic resonance imaging apparatus includes a mode switching part and an imaging system. The mode switching part is configured to put a circuit system consuming a power into a shutdown state when a first trigger has been detected and put the circuit system being the shutdown state into a startup state when a second trigger has been detected. The first trigger shows that an imaging does not start for a certain period. The second trigger shows that the imaging starts. The imaging system is configured to perform the imaging by using the circuit system being the startup state.
    Type: Grant
    Filed: November 21, 2012
    Date of Patent: July 5, 2016
    Assignee: TOSHIBA MEDICAL SYSTEMS CORPORATION
    Inventors: Motohisa Yokoi, Kanta Kobuchi, Sho Kawajiri, Masaaki Yamanaka, Naoki Imamura, Hitoshi Kanazawa
  • Publication number: 20140300362
    Abstract: A magnetic resonance imaging device according to an embodiment includes a gradient amplifier, a battery, a detector, and a battery controller. The gradient amplifier supplies electric power to the gradient coil. The battery is charged with electric power that is supplied from the power supply. The detector detects a high power output request on the gradient amplifier. The battery controller controls to supply electric power charged in the battery in addition to electric power supplied from the power supply to the gradient amplifier when the high power output request is detected.
    Type: Application
    Filed: June 25, 2014
    Publication date: October 9, 2014
    Inventors: Sho KAWAJIRI, Motohisa YOKOI, Motohiro MIURA, Masashi HORI, Kazuyuki SOEJIMA, Naoki IMAMURA, Haruki NAKAMURA
  • Publication number: 20140070809
    Abstract: In one embodiment, an MRI apparatus (20A) includes a data acquisition system (22, 24, 26, 28, 29, 40, 42, 44, 46 and 48), a charge/discharge element (BAT) and a power control unit (52 and 309). The data acquisition system acquires nuclear magnetic resonance signals from an imaging region by performing a scan. The charge/discharge element is a part of an electric power system (304, 308a, 52, BD and BAU) of the MRI apparatus, and is charged with external electric power. The power control unit controls the electric power system in such a manner that at least one unit excluding the data acquisition system is supplied with electric power from the charge/discharge element.
    Type: Application
    Filed: October 31, 2013
    Publication date: March 13, 2014
    Applicants: TOSHIBA MEDICAL SYSTEMS CORPORATION, KABUSHIKI KAISHA TOSHIBA
    Inventors: Naoki IMAMURA, Motohisa YOKOI, Kazuyuki SOEJIMA, Motohiro MIURA, Sho KAWAJIRI, Haruki NAKAMURA
  • Publication number: 20140070812
    Abstract: In one embodiment, the image diagnosis apparatus (20) generates image data of an object by using external electric power, and includes a charge/discharge element (BA1, . . . BAn) and a charge/discharge control circuit (140, 152). The charge/discharge element is charged with the external electric power and supply a part of the consumed power of the image diagnosis apparatus by discharging. The charge/discharge control circuit controls charge and discharge of the charge/discharge element in such a manner that the charge/discharge element discharges in a period during which the consumed power is larger than a predetermined power amount and the charge/discharge element is charged in a period during which the consumed power is smaller than the predetermined power amount.
    Type: Application
    Filed: October 31, 2013
    Publication date: March 13, 2014
    Applicants: TOSHIBA MEDICAL SYSTEMS CORPORATION, KABUSHIKI KAISHA TOSHIBA
    Inventors: Motohisa YOKOI, Motohiro MIURA, Sho KAWAJIRI, Kazuyuki SOEJIMA, Haruki NAKAMURA, Naoki IMAMURA
  • Publication number: 20130278267
    Abstract: According to one embodiment of the present invention, an MRI apparatus (20) includes a charge/discharge controlling unit (56, 126, 128), a judging unit (102, 132, 134, 136, 140 and 142) and a condition restricting unit (104). The charge/discharge controlling unit includes a charge/discharge element (126), receives electric power, and charges the charge/discharge element (126) by using the received electric power. The charge/discharge controlling unit also supplies a gradient magnetic field coil (26) with electric power discharged from the charge/discharge element (126) at a time of performance of magnetic resonance imaging. The judging unit judges whether capacitance of the charge/discharge element (126) falls below a threshold value or not. The condition restricting unit (104) restricts electric power amount supplied to the gradient magnetic field coil (26) by restricting conditions of an imaging sequence, when the capacitance of the charge/discharge element (126) falls below the threshold value.
    Type: Application
    Filed: April 16, 2013
    Publication date: October 24, 2013
    Applicants: Toshiba Medical Systems Corporation, Kabushiki Kaisha Toshiba
    Inventors: Masashi HORI, Motohiro MIURA, Motohisa YOKOI, Sho KAWAJIRI
  • Publication number: 20130147485
    Abstract: A magnetic resonance imaging apparatus includes a superconductive coil unit, a cooling vessel and a plurality of refrigerators. The superconductive coil unit includes a superconductive coil, and a supporter configured to support the superconductive coil. The cooling vessel houses the superconductive coil unit and is free from liquid helium. The plurality of refrigerators are disposed on the superconductive coil unit and cool the superconductive coil unit.
    Type: Application
    Filed: December 11, 2012
    Publication date: June 13, 2013
    Inventor: Motohisa YOKOI
  • Publication number: 20130127467
    Abstract: According to one embodiment, a magnetic resonance imaging apparatus includes a mode switching part and an imaging system. The mode switching part is configured to put a circuit system consuming a power into a shutdown state when a first trigger has been detected and put the circuit system being the shutdown state into a startup state when a second trigger has been detected. The first trigger shows that an imaging does not start for a certain period. The second trigger shows that the imaging starts. The imaging system is configured to perform the imaging by using the circuit system being the startup state.
    Type: Application
    Filed: November 21, 2012
    Publication date: May 23, 2013
    Applicants: TOSHIBA MEDICAL SYSTEMS CORPORATION, KABUSHIKI KAISHA TOSHIBA
    Inventors: Motohisa YOKOI, Kanta KOBUCHI, Sho KAWAJIRI, Masaaki YAMANAKA, Naoki IMAMURA, Hitoshi KANAZAWA
  • Patent number: 7626385
    Abstract: An MRI apparatus consolidates and stores maintenance and/or performance data automatically measured by a measurement unit and data manually input via an input device. The automatically measured data may include an adjustment value, a state value or an error record. The manually input data may include a software and/or hardware upgrade record, a customized situation record, a network connection record, a repair record, a check record, a maintenance record or an installation record, for example. Both types of data can be obtained swiftly and faults or malfunctions can be recovered from quickly or even prevented in advance. The stored data may be communicated among a plurality of MRI apparatuses, a service center apparatus and a maintenance support apparatus via a communications network.
    Type: Grant
    Filed: May 25, 2005
    Date of Patent: December 1, 2009
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Motohisa Yokoi, Yoshimori Kassai
  • Patent number: 6972565
    Abstract: An MRI apparatus consolidates and stores maintenance and/or performance data automatically measured by a measurement unit and data manually input via an input device. The automatically measured data may include an adjustment value, a state value or an error record. The manually input data may include a software and/or hardware upgrade record, a customized situation record, a network connection record, a repair record, a check record, a maintenance record or an installation record, for example. Both types of data can be obtained swiftly and faults or malfunctions can be recovered from quickly or even prevented in advance. The stored data may be communicated among a plurality of MRI apparatuses, a service center apparatus and a maintenance support apparatus via a communications network.
    Type: Grant
    Filed: December 26, 2002
    Date of Patent: December 6, 2005
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Motohisa Yokoi, Yoshimori Kassai
  • Publication number: 20050234330
    Abstract: An MRI apparatus consolidates and stores maintenance and/or performance data automatically measured by a measurement unit and data manually input via an input device. The automatically measured data may include an adjustment value, a state value or an error record. The manually input data may include a software and/or hardware upgrade record, a customized situation record, a network connection record, a repair record, a check record, a maintenance record or an installation record, for example. Both types of data can be obtained swiftly and faults or malfunctions can be recovered from quickly or even prevented in advance. The stored data may be communicated among a plurality of MRI apparatuses, a service center apparatus and a maintenance support apparatus via a communications network.
    Type: Application
    Filed: May 25, 2005
    Publication date: October 20, 2005
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Motohisa Yokoi, Yoshimori Kassai
  • Publication number: 20030215125
    Abstract: An MRI apparatus consolidates and stores maintenance and/or performance data automatically measured by a measurement unit and data manually input via an input device. The automatically measured data may include an adjustment value, a state value or an error record. The manually input data may include a software and/or hardware upgrade record, a customized situation record, a network connection record, a repair record, a check record, a maintenance record or an installation record, for example. Both types of data can be obtained swiftly and faults or malfunctions can be recovered from quickly or even prevented in advance. The stored data may be communicated among a plurality of MRI apparatuses, a service center apparatus and a maintenance support apparatus via a communications network.
    Type: Application
    Filed: December 26, 2002
    Publication date: November 20, 2003
    Inventors: Motohisa Yokoi, Yoshimori Kassai