Patents by Inventor Kazuto Nakabayashi

Kazuto Nakabayashi 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: 20220146609
    Abstract: According to one embodiment, a magnetic resonance imaging system includes a first power supply, one or more second power supplies and control circuitry. The first power supply supplies power to a magnetic resonance imaging apparatus at a time of power outage of a commercial power supply electrically connected to the magnetic resonance imaging apparatus. The second power supplies supply the power to the magnetic resonance imaging apparatus. The control circuitry determines a state of feeding from the first power supply and the second power supplies to the magnetic resonance imaging apparatus, and performs control of power consumption in the magnetic resonance imaging apparatus based on a determination result of the state of feeding.
    Type: Application
    Filed: October 21, 2021
    Publication date: May 12, 2022
    Applicant: Canon Medical Systems Corporation
    Inventors: Yohei HASHIZUME, Tomoyuki YOSHIDA, Kazuto NAKABAYASHI
  • Publication number: 20220146611
    Abstract: According to one embodiment, a MRI apparatus determines a first time during which a subsidiary power supply is capable of supplying power to a cooling device based on a capacity of the subsidiary power supply when power outage of a main power supply occurs, and determines a second time needed to demagnetize a superconducting magnet based on an excitation current of the superconducting magnet and a temperature of the superconducting magnet. The MRI apparatus determines starts ramp-down of the superconducting magnet after a third time based on the first time and the second time has elapsed from initiation of power outage of the main power supply.
    Type: Application
    Filed: November 5, 2021
    Publication date: May 12, 2022
    Applicant: Canon Medical Systems Corporation
    Inventors: Kazuto NAKABAYASHI, Takehiro SHIBUYA
  • Patent number: 10799142
    Abstract: A PET-MRI apparatus according to an embodiment includes a static magnetic field magnet, a gradient coil, a birdcage-type radio frequency coil, and at least one PET detector. The static magnetic field magnet is configured to generate a static magnetic field. The gradient coil is configured to apply a gradient magnetic field to a subject placed in the static magnetic field. The radio frequency coil includes two end rings and a plurality of rungs arranged at intervals along a circumferential direction of the end rings and is configured to transmit a radio frequency pulse or to receive a magnetic resonance signal from the subject. Further, the PET detector is housed inside a conductor structuring the rungs of the radio frequency coil.
    Type: Grant
    Filed: July 17, 2017
    Date of Patent: October 13, 2020
    Assignee: CANON MEDICAL SYSTEMS CORPORATION
    Inventors: Kazuya Okamoto, Kazuto Nakabayashi
  • Publication number: 20200241098
    Abstract: A medical image processing apparatus of embodiments includes processing circuitry. The processing circuitry is configured to acquire a data and a g-factor map. The data is generated as a result of a reception by an RF coil. The processing circuitry is configured to determine strength of denoise performed on the data on the basis of the g-factor map and perform the denoise on the data.
    Type: Application
    Filed: January 28, 2020
    Publication date: July 30, 2020
    Applicant: Canon Medical Systems Corporation
    Inventors: Kensuke SHINODA, Kazuto NAKABAYASHI, Hitoshi KANAZAWA, Kazuya OKAMOTO, Hiroshi TAKAI, Nobuyuki KONUMA, Yuichi YAMASHITA
  • Publication number: 20200200848
    Abstract: According to one embodiment, a medical information processing apparatus includes processing circuitry configured to derive an index value with respect to noise included in data associated with magnetic resonance signals collected by each of a plurality of reception coils, adjust a degree to which noise is removed from the data associated with the magnetic resonance signals based on the derived index value, remove noise from the data associated with the magnetic resonance signals based on the adjusted degree, and perform compositing of the data associated with the magnetic resonance signals from which noise has been removed.
    Type: Application
    Filed: December 19, 2019
    Publication date: June 25, 2020
    Applicant: CANON MEDICAL SYSTEMS CORPORATION
    Inventors: Yuichi YAMASHITA, Kazuto NAKABAYASHI, Hitoshi KANAZAWA, Kazuya OKAMOTO, Hiroshi TAKAI, Nobuyuki KONUMA, Kensuke SHINODA
  • Publication number: 20180028092
    Abstract: A PET-MRI apparatus according to an embodiment includes a static magnetic field magnet, a gradient coil, a birdcage-type radio frequency coil, and at least one PET detector. The static magnetic field magnet is configured to generate a static magnetic field. The gradient coil is configured to apply a gradient magnetic field to a subject placed in the static magnetic field. The radio frequency coil includes two end rings and a plurality of rungs arranged at intervals along a circumferential direction of the end rings and is configured to transmit a radio frequency pulse or to receive a magnetic resonance signal from the subject. Further, the PET detector is housed inside a conductor structuring the rungs of the radio frequency coil.
    Type: Application
    Filed: July 17, 2017
    Publication date: February 1, 2018
    Applicant: Toshiba Medical Systems Corporation
    Inventors: Kazuya OKAMOTO, Kazuto NAKABAYASHI
  • Patent number: 7741847
    Abstract: A magnetic resonance apparatus in which magnetic metal pieces are accommodated in an accommodation section so as to correct uniformity in a main magnetic field, includes an acquisition unit which acquires temperature information related to at least one of a temperature of the magnetic metal pieces accommodated in the accommodation section, a temperature of the accommodation section, and a temperature of a position in the vicinity of the accommodation section, and a temperature adjustment unit which adjusts the temperature of the magnetic metal pieces to a target temperature by preheating the magnetic metal pieces on the basis of the temperature information acquired by the acquisition unit.
    Type: Grant
    Filed: October 10, 2007
    Date of Patent: June 22, 2010
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Medical Systems Corporation
    Inventors: Kazuto Nakabayashi, Masatoshi Hanawa
  • Patent number: 7619415
    Abstract: A magnetic resonance imaging apparatus has at least one RF coil and a data processing control unit. The RF coil generates unique information receives a nuclear magnetic resonance signal, and wirelessly transmits the received nuclear magnetic resonance signal and the unique information. The data processing control unit receives the wirelessly transmitted nuclear magnetic resonance signal and the unique information, and generates image data based on the nuclear magnetic resonance signal in accordance with the unique information.
    Type: Grant
    Filed: April 4, 2008
    Date of Patent: November 17, 2009
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Medical Systems Corporation
    Inventor: Kazuto Nakabayashi
  • Patent number: 7570056
    Abstract: A coil support unit for use in a magnetic resonance imaging apparatus provided with a top board for placing thereon a subject, and a radio frequency coil provided on an upper surface of the top board, the magnetic resonance imaging apparatus imaging the subject utilizing the radio frequency coil, the coil support unit includes a port configured to electrically connect the radio frequency coil to a signal cable, the signal cable transmitting at least one of a transmission signal supplied to the radio frequency coil, and a magnetic resonance signal detected by the radio frequency coil, and a support member provided on the upper surface of the top board and including a guide groove formed therein, the guide groove permitting the port to slide therein.
    Type: Grant
    Filed: August 10, 2006
    Date of Patent: August 4, 2009
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Medical Systems Corporation
    Inventors: Kazuto Nakabayashi, Kazuya Okamoto
  • Publication number: 20080246477
    Abstract: A magnetic resonance imaging apparatus has at least one RF coil and a data processing control unit. The RF coil that generates unique information, receives a nuclear magnetic resonance signal, and wirelessly transmits the received nuclear magnetic resonance signal and the unique information. The data processing control unit receives the wirelessly transmitted nuclear magnetic resonance signal and the unique information, and generates image data based on the nuclear magnetic resonance signal in accordance with the unique information.
    Type: Application
    Filed: April 4, 2008
    Publication date: October 9, 2008
    Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA MEDICAL SYSTEMS CORPORATION
    Inventor: Kazuto Nakabayashi
  • Publication number: 20080088311
    Abstract: A magnetic resonance apparatus in which magnetic metal pieces are accommodated in an accommodation section so as to correct uniformity in a main magnetic field, includes an acquisition unit which acquires temperature information related to at least one of a temperature of the magnetic metal pieces accommodated in the accommodation section, a temperature of the accommodation section, and a temperature of a position in the vicinity of the accommodation section, and a temperature adjustment unit which adjusts the temperature of the magnetic metal pieces to a target temperature by preheating the magnetic metal pieces on the basis of the temperature information acquired by the acquisition unit.
    Type: Application
    Filed: October 10, 2007
    Publication date: April 17, 2008
    Applicants: KABUSHIKI KAISHA TOSHIBA, Toshiba Medical Systems Corporation
    Inventors: Kazuto Nakabayashi, Masatoshi Hanawa
  • Patent number: 7330030
    Abstract: A magnetic resonance imaging apparatus includes a top plate on which an patient to be imaged is disposed, a plurality of positioning units that determines setting positions of RF coils detachable from the top plate in a plurality of different positions, and a detecting unit that detects the setting positions of the RF coils based on one of the positioning units that is used in order to determine the setting positions of the RF coils.
    Type: Grant
    Filed: October 27, 2006
    Date of Patent: February 12, 2008
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Medical Systems Corporation
    Inventor: Kazuto Nakabayashi
  • Publication number: 20070096739
    Abstract: A magnetic resonance imaging apparatus includes a top plate on which an patient to be imaged is disposed, a plurality of positioning units that determines setting positions of RF coils detachable from the top plate in a plurality of different positions, and a detecting unit that detects the setting positions of the RF coils based on one of the positioning units that is used in order to determine the setting positions of the RF coils.
    Type: Application
    Filed: October 27, 2006
    Publication date: May 3, 2007
    Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA MEDICAL SYSTEMS CORPORATION
    Inventor: Kazuto Nakabayashi
  • Publication number: 20070035301
    Abstract: A coil support unit for use in a magnetic resonance imaging apparatus provided with a top board for placing thereon a subject, and a radio frequency coil provided on an upper surface of the top board, the magnetic resonance imaging apparatus imaging the subject utilizing the radio frequency coil, the coil support unit includes a port configured to electrically connect the radio frequency coil to a signal cable, the signal cable transmitting at least one of a transmission signal supplied to the radio frequency coil, and a magnetic resonance signal detected by the radio frequency coil, and a support member provided on the upper surface of the top board and including a guide groove formed therein, the guide groove permitting the port to slide therein.
    Type: Application
    Filed: August 10, 2006
    Publication date: February 15, 2007
    Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA MEDICAL SYSTEMS CORPORATION
    Inventors: Kazuto Nakabayashi, Kazuya Okamoto
  • Publication number: 20010022515
    Abstract: A magnetic resonance imaging apparatus generates an MR signal from an object to be examined by applying a gradient field pulse generated by a gradient field coil and a high-frequency magnetic field pulse generated by a high-frequency coil onto the object in a static field generated by a static field magnet, and reconstructs an image on the basis of the MR signal. The gradient field coil is housed in a sealed vessel. A cable extending from an external power supply and connected to the gradient field coil has predetermined flexibility.
    Type: Application
    Filed: January 19, 2001
    Publication date: September 20, 2001
    Inventors: Masatoshi Yamashita, Manabu Ishii, Yoshitomo Sakakura, Hiromitsu Takamori, Kazuto Nakabayashi, Yoshinori Hamamura, Shinji Mitsui, Yasutake Yasuhara
  • Patent number: 5349298
    Abstract: An RF coil system for MRI comprises a coil unit for producing an exciting RF magnetic field or receiving an MR signal. A distributed constant line is connected to the coil unit and is formed into a length less than n.multidot.(.lambda./4) (n is a positive integer of one or more), where .lambda. is an wavelength of the RF signal or MR signal. A lumped constant circuit is connected in series to the distributed constant line and virtually forming the length of n.multidot.(.lambda./4) in cooperation operatively with the distributed constant line.
    Type: Grant
    Filed: February 11, 1993
    Date of Patent: September 20, 1994
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Kazuto Nakabayashi
  • Patent number: 5144243
    Abstract: An RF coil system, used for a magnetic resonance imaging apparatus and adapted to perform at least one of application of an excitation high-frequency magnetic field and detection of magnetic resonance signals, comprises a plurality of coil elements arranged at regularly spaced intervals without overlap therebetween, an RF circuit for putting at least one of the coil elements into an operative state or an inoperative state, a neutralizing circuit for neutralizing inductive coupling between the coil elements, a tuning circuit for tuning at least one of the coil elements to a given frequency, an adder circuit for adding an output signal of the tuning circuit and conductors for electrically connecting the coil elements, the RF circuit, the neutralizing circuit and the adder circuit.
    Type: Grant
    Filed: February 13, 1991
    Date of Patent: September 1, 1992
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Kazuto Nakabayashi, Timothy R. Fox
  • Patent number: 5051699
    Abstract: A magnetic resonance imaging system includes a static magnetic field generating section, a gradient magnetic field applying section, an RF pulse applying section, a sequence control section, a receiving section, and an imaging processing section. The sequence control section causes an RF pulse to excite magnetic resonance, causes at least one of the RF pulse and the gradient field to produce an initial magnetic resonance echo, applies a read gradient field to the imaging volume upon reception of the magnetic resonance echo, and inverts the read gradient field at least once to produce at least one magnetic resonance echo in addition to the initial magnetic resonance echo. The receiving section adds and averages data of a plurality of such magnetic resonance echoes or performs an addition or subtraction of the magnetic resonance echoes.
    Type: Grant
    Filed: August 29, 1989
    Date of Patent: September 24, 1991
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Masatoshi Hanawa, Kazuto Nakabayashi
  • Patent number: 5028871
    Abstract: A magnetic resonance imaging system includes a static magnetic field generating section, a gradient magnetic field applying section, an RF pulse applying section, a sequence control section, a receiving section, and an imaging processing section. The sequence control section controls a sequence so as to generate a 180.degree. pulse at a timing at which a peak of the 180.degree. pulse appears at t=TE'/2, assuming that TE'=TE-n.tau.c (where TE is the echo time for a proton, .tau.c is the period in which phases of spins of water and fat match with each other and which is obtained on the basis of a chemical shift amount of protons of water and fat, and n is an integer of 1 or more), and a peak of a 90.degree. pulse appears at t=0, generate a read gradient magnetic field Gr whose strength condition is set to cause an echo peak to appear at t=TE=TE'+n.tau.c, and generate a slicing gradient magnetic field Gs whose strength condition is set to obtain a predetermined view angle .theta.
    Type: Grant
    Filed: August 29, 1989
    Date of Patent: July 2, 1991
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Kazuto Nakabayashi
  • Patent number: 5028872
    Abstract: A magnetic resonance imaging (MRI) system which includes a main shield member arranged in the cylindrical housing; and a sub shield member which is electrically connected to the main shield member and is arranged outside the housing to cover a region where the object under examination is placed. Thus, a magnetic resonance signal can be prevented from being electromagnetically mixed with the disturbance electromagnetic wave, and an MRI image can be accurately formed. The sub shield member covers only a desired region of a patient. For this reason, the patient can satisfactorily receive external light, the feeling of oppression can be greatly eliminated, and the shield member can be rendered compact. The sub shield member includes a lid shield member which is detachably attached to the main shield member, and a cover shield member which covers a portion extending from the main shield member.
    Type: Grant
    Filed: August 11, 1989
    Date of Patent: July 2, 1991
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Kazuto Nakabayashi