Patents by Inventor Tokunori Kimura

Tokunori Kimura 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).

  • Patent number: 10916007
    Abstract: According to one embodiment, an MRI apparatus includes a data acquisition unit and an image generation unit. The data acquisition unit acquires MR data from an object. The MR data correspond to a sampling region asymmetric in a wave number direction in a k-space. The image generation unit generates amplitude image data, in a real space, based on first k-space data after zero padding to a non-sampling region of the MR data and generates MR image data by data processing of the amplitude image data or convolution processing of the amplitude image data. The data processing converts the amplitude image data into second k-space data, performs filtering of the second k-space data and converts the second k-space data after the filtering into real space data. The convolution processing uses a function in the real space. The function is derived by converting a window function for the filtering.
    Type: Grant
    Filed: January 30, 2015
    Date of Patent: February 9, 2021
    Assignee: TOSHIBA MEDICAL SYSTEMS CORPORATION
    Inventor: Tokunori Kimura
  • Patent number: 10768258
    Abstract: A magnetic resonance imaging apparatus according to an embodiment includes processing circuitry. The processing circuitry performs at least one of data collection for collecting first data of an imaging region of a subject at a plurality of time intervals after a tag pulse is applied to fluid flowing into the imaging region, and data collection for collecting second data of the imaging region by differing at least one of applying or not-applying the tag pulse and a position of the applying. The processing circuitry performs phase correction for at least one of the first data and the second data by using data in which the longitudinal magnetization of the fluid is a positive value, to generate an image for each time phase.
    Type: Grant
    Filed: September 1, 2016
    Date of Patent: September 8, 2020
    Assignee: Canon Medical Systems Corporation
    Inventors: Tokunori Kimura, Naotaka Sakashita
  • Patent number: 10684342
    Abstract: In one embodiment, an MRI apparatus includes: an MRI scanner configured to acquire N+1 or more diffusion-weighted images by differently setting parameter values among the diffusion-weighted images, with regard to N types of parameters, wherein N is a natural number equal to or more than two; and processing circuitry configured to generate a computed diffusion-weighted image having an arbitrary value for at least one of the N types of parameters, based on relationship between signal values of the acquired diffusion-weighted images and the parameter values differently set among the acquired diffusion-weighted images.
    Type: Grant
    Filed: March 18, 2016
    Date of Patent: June 16, 2020
    Assignee: Canon Medical Systems Corporation
    Inventor: Tokunori Kimura
  • Patent number: 10663552
    Abstract: A magnetic resonance imaging apparatus according to an embodiment includes a dividing unit, an acquiring unit, and a combining unit. The dividing unit is configured to divide an imaging region of a patient into at least two temporal or spatial ranges. Of the temporal or spatial ranges, the acquiring unit is configured to perform a data acquiring process on a first range by using a first readout sequence and to perform a data acquiring process on a second range by using a second readout sequence that is different from the first readout sequence in terms of one or both of the type of sequence and an imaging condition. The combining unit is configured to combine an image generated from data acquired by using the first readout sequence with an image generated from data acquired by using the second readout sequence.
    Type: Grant
    Filed: October 1, 2015
    Date of Patent: May 26, 2020
    Assignee: TOSHIBA MEDICAL SYSTEMS CORPORATION
    Inventor: Tokunori Kimura
  • Patent number: 10613178
    Abstract: In one embodiment, an MRI apparatus includes: a scanner equipped with at least a static magnetic field magnet configured to generate a static magnetic field, a gradient coil configured to apply gradient pulses, and an RF coil configured to apply RF pulses to an object and receive magnetic resonance signals from the object; and processing circuitry configured to set at least one pulse sequence which includes a labeling pulse for labeling fluid in the object, an excitation pulse applied after the labeling pulse, and a bipolar or unipolar velocity encoding gradient pulse for encoding velocity information of the fluid, and generate an image of the fluid from the magnetic resonance signals which the scanner acquires by performing the at least one pulse sequence.
    Type: Grant
    Filed: September 22, 2017
    Date of Patent: April 7, 2020
    Assignee: Canon Medical Systems Corporation
    Inventors: Tokunori Kimura, Naotaka Sakashita
  • Patent number: 10307077
    Abstract: There is provided a medical image display apparatus comprising a storage unit which stores data of a plurality of different types of medical images including the same region of a subject to be examined which are generated by the same type of image generating device, and a display control unit which displays the plurality of medical images at substantially the same position on a screen while sequentially switching the medical images one by one.
    Type: Grant
    Filed: February 12, 2018
    Date of Patent: June 4, 2019
    Assignee: CANON MEDICAL SYSTEMS CORPORATION
    Inventor: Tokunori Kimura
  • Patent number: 10219721
    Abstract: A magnetic resonance imaging apparatus includes an acquisition unit that acquires first data in which a tissue of interest has higher signal intensity than a background and second data in which the tissue of interest has lower signal intensity than the background, with regard to images of the same region of the same subject, and a generation unit that generates, on the basis of the first data and the second data, third data in which the contrast of the tissue of interest to the background is higher than those in the first and second data.
    Type: Grant
    Filed: September 22, 2010
    Date of Patent: March 5, 2019
    Assignee: TOSHIBA MEDICAL SYSTEMS CORPORATION
    Inventors: Tokunori Kimura, Masato Ikedo
  • Patent number: 10098563
    Abstract: A magnetic resonance imaging apparatus includes an acquisition unit which acquires first data in which a tissue of interest has higher signal intensity than a background and second data in which the tissue of interest has lower signal intensity than the background, with regard to images of the same region of the same subject, and a generation unit which generates, on the basis of the first data and the second data, third data in which the contrast of the tissue of interest to the background is higher than those in the first and second data.
    Type: Grant
    Filed: November 21, 2007
    Date of Patent: October 16, 2018
    Assignee: TOSHIBA MEDICAL SYSTEMS CORPORATION
    Inventors: Tokunori Kimura, Masato Ikedo
  • Publication number: 20180160935
    Abstract: There is provided a medical image display apparatus comprising a storage unit which stores data of a plurality of different types of medical images including the same region of a subject to be examined which are generated by the same type of image generating device, and a display control unit which displays the plurality of medical images at substantially the same position on a screen while sequentially switching the medical images one by one.
    Type: Application
    Filed: February 12, 2018
    Publication date: June 14, 2018
    Inventor: Tokunori KIMURA
  • Publication number: 20180095153
    Abstract: In one embodiment, an MRI apparatus includes: a scanner equipped with at least a static magnetic field magnet configured to generate a static magnetic field, a gradient coil configured to apply gradient pulses, and an RF coil configured to apply RF pulses to an object and receive magnetic resonance signals from the object; and processing circuitry configured to set at least one pulse sequence which includes a labeling pulse for labeling fluid in the object, an excitation pulse applied after the labeling pulse, and a bipolar or unipolar velocity encoding gradient pulse for encoding velocity information of the fluid, and generate an image of the fluid from the magnetic resonance signals which the scanner acquires by performing the at least one pulse sequence.
    Type: Application
    Filed: September 22, 2017
    Publication date: April 5, 2018
    Applicant: TOSHIBA MEDICAL SYSTEMS CORPORATION
    Inventors: Tokunori KIMURA, Naotaka SAKASHITA
  • Patent number: 9924887
    Abstract: There is provided a medical image display apparatus comprising a storage unit which stores data of a plurality of different types of medical images including the same region of a subject to be examined which are generated by the same type of image generating device, and a display control unit which displays the plurality of medical images at substantially the same position on a screen while sequentially switching the medical images one by one.
    Type: Grant
    Filed: August 29, 2005
    Date of Patent: March 27, 2018
    Assignee: TOSHIBA MEDICAL SYSTEMS CORPORATION
    Inventor: Tokunori Kimura
  • Patent number: 9791533
    Abstract: A magnetic resonance imaging apparatus according to an embodiment includes an execution unit and a generation unit. The execution unit executes first data collection after a predetermined inversion time elapses from a time when a labeling pulse is applied to a fluid flowing into an imaging region of a subject and a second data collection without application of the labeling pulse. The generation unit generates a differential image by using the first data and the second data. Here, the generation unit generates the differential image by a different differential method according to a relationship between the inversion time and a longitudinal relaxation time of the fluid.
    Type: Grant
    Filed: August 28, 2014
    Date of Patent: October 17, 2017
    Assignee: TOSHIBA MEDICAL SYSTEMS CORPORATION
    Inventors: Naotaka Sakashita, Tokunori Kimura
  • Publication number: 20170254868
    Abstract: A magnetic resonance imaging apparatus according to an embodiment includes processing circuitry. The processing circuitry performs at least one of data collection for collecting first data of an imaging region of a subject at a plurality of time intervals after a tag pulse is applied to fluid flowing into the imaging region, and data collection for collecting second data of the imaging region by differing at least one of applying or not-applying the tag pulse and a position of the applying. The processing circuitry performs phase correction for at least one of the first data and the second data by using data in which the longitudinal magnetization of the fluid is a positive value, to generate an image for each time phase.
    Type: Application
    Filed: September 1, 2016
    Publication date: September 7, 2017
    Applicant: Toshiba Medical Systems Corporation
    Inventors: Tokunori KIMURA, Naotaka SAKASHITA
  • Publication number: 20170164908
    Abstract: An image processing apparatus according to an embodiment includes processing circuitry. The processing circuitry is configured to obtain three-dimensional image data of a brain acquired by performing a magnetic resonance imaging process. The processing circuitry is configured to generate a projection image rendering a micro bleed or calcification occurring in the brain by performing a projecting process on the three-dimensional image data in a range limited on the basis of a shape of the brain. The processing circuitry is configured to output the projection image.
    Type: Application
    Filed: December 5, 2016
    Publication date: June 15, 2017
    Applicant: Toshiba Medical Systems Corporation
    Inventor: Tokunori KIMURA
  • Patent number: 9538936
    Abstract: A magnetic resonance imaging apparatus includes an acquisition unit which acquires first data in which a tissue of interest has higher signal intensity than a background and second data in which the tissue of interest has lower signal intensity than the background, with regard to images of the same region of the same subject, and a generation unit which generates, on the basis of the first data and the second data, third data in which the contrast of the tissue of interest to the background is higher than those in the first and second data.
    Type: Grant
    Filed: November 20, 2008
    Date of Patent: January 10, 2017
    Assignee: TOSHIBA MEDICAL SYSTEMS CORPORATION
    Inventors: Tokunori Kimura, Masato Ikedo
  • Patent number: 9535147
    Abstract: First and second magnetization vectors are detected for each pixel position in an imaging region including at least part of a subject, the magnetization vector being excited to have a phase difference between a flow portion and a static portion or between a normal portion and an abnormal portion. First and second pixel values at each pixel position are determined as a value proportional to an absolute value of the respectively corresponding amplitudes of the first and second magnetization vectors detected for each of the pixel positions. On the basis of a real part or phase of the magnetization vectors detected for each of the pixel positions, the determined pixel values are corrected so that the difference of pixel values corresponding to third pixel values increases between (a) the flow portion or the abnormal portion and (b) the static portion or the normal portion.
    Type: Grant
    Filed: October 15, 2013
    Date of Patent: January 3, 2017
    Assignee: TOSHIBA MEDICAL SYSTEMS CORPORATION
    Inventor: Tokunori Kimura
  • Patent number: 9488711
    Abstract: According to one embodiment, an MRI apparatus includes a data acquiring part and a data processing part. The data acquiring part acquires first and second MR signals by applying at least one IR pulse under an application condition according to a relaxation time of a fluid. The first MR signals include MR signals, having negative values, from the fluid. The second MR signals include MR signals, having positive values, from the fluid. The data processing part generates first and second image data. The first image data depict the fluid as a lower signal region than that of a tissue. The second image data depict the fluid as a higher signal region than that of the tissue. The data processing part generates the first image data with a phase correction based on the second MR signals.
    Type: Grant
    Filed: November 12, 2014
    Date of Patent: November 8, 2016
    Assignee: TOSHIBA MEDICAL SYSTEMS CORPORATION
    Inventor: Tokunori Kimura
  • Publication number: 20160202338
    Abstract: In one embodiment, an MRI apparatus includes: an MRI scanner configured to acquire N+1 or more diffusion-weighted images by differently setting parameter values among the diffusion-weighted images, with regard to N types of parameters, wherein N is a natural number equal to or more than two; and processing circuitry configured to generate a computed diffusion-weighted image having an arbitrary value for at least one of the N types of parameters, based on relationship between signal values of the acquired diffusion-weighted images and the parameter values differently set among the acquired diffusion-weighted images.
    Type: Application
    Filed: March 18, 2016
    Publication date: July 14, 2016
    Applicants: Kabushiki Kaisha Toshiba, TOSHIBA MEDICAL SYSTEMS CORPORATION
    Inventor: Tokunori KIMURA
  • Publication number: 20160047875
    Abstract: A magnetic resonance imaging diagnostic apparatus includes a generating unit which generates a slice gradient magnetic field, a phase-encode gradient magnetic field and a read-out gradient magnetic field that extend in a slice axis, a phase-encode axis and a read-out axis, respectively, a setting unit which sets a dephase amount for weighting a signal-level decrease resulting from flows in the arteries and veins present in a region of interest of a subject, with respect to at least one axis selected form the slice axis, phase-encode axis and read-out axes, and a control unit which controls the generating unit by using a pulse sequence for a gradient echo system, which includes a dephase gradient-magnetic-field pulse that corresponds to the dephase amount set by the setting unit for the at least one axis.
    Type: Application
    Filed: October 27, 2015
    Publication date: February 18, 2016
    Inventors: Masato Ikedo, Tokunori Kimura
  • Patent number: RE46567
    Abstract: Provided is an MRI apparatus. In the MRI apparatus, a data collection unit repetitively performs a tag mode of applying an RF wave to at least an upstream portion of an imaging area to perform fluid labeling of a fluid flown into the imaging area and, after a lapse of an inversion time from application of the RF wave, performing magnetic resonance data collection, while changing the inversion time. An image reconstruction unit reconstructs a plurality of tag images corresponding to a plurality of different inversion times based on the magnetic resonance data collected in the tag mode. A reference image generation unit generates a reference image based on the plurality of the tag images. A fluid image generation unit generates a subtraction image between each of the tag images and the reference image as a fluid image.
    Type: Grant
    Filed: December 31, 2015
    Date of Patent: October 10, 2017
    Assignee: Toshiba Medical Systems Corporation
    Inventor: Tokunori Kimura