Patents by Inventor Tomoyuki Takeguchi

Tomoyuki Takeguchi 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: 10775469
    Abstract: According to one embodiment, a magnetic resonance imaging apparatus includes processing circuitry. The processing circuitry estimates transmission inhomogeneity caused in a transmit RF magnetic field from a first image based on a first signal received by a whole-body coil, and estimates reception inhomogeneity caused in a receive RF magnetic field from the first image and a second image based on a second signal received by a surface coil. The processing circuitry generates a third image, having a resolution higher than a resolution of the first image and a resolution of the second image, based on a third signal received by the surface coil. The processing circuitry corrects the third image by using the estimated transmission inhomogeneity and reception inhomogeneity.
    Type: Grant
    Filed: April 17, 2019
    Date of Patent: September 15, 2020
    Assignee: Canon Medical Systems Corporation
    Inventors: Tomoya Tsuruyama, Shuhei Nitta, Tomoyuki Takeguchi
  • Patent number: 10702157
    Abstract: A magnetic resonance imaging apparatus acquires first imaging data of a three-dimensional image including a heart, having a plurality of two-dimensional first imaging area data superimposed one on top of another in parallel, and having a resolution at least in one direction different from a resolution in two other directions. A first axis is detected expressed in three dimensions relating to the heart from the three-dimensional first imaging data. A first vector is calculated passing through the first axis and having at least a predetermined resolution. First image data is generated on a plane passing through the first axis and the first vector from the first imaging data and a second axis is detected relating to the heart from the first image data, the second axis being a higher precision axis.
    Type: Grant
    Filed: December 3, 2014
    Date of Patent: July 7, 2020
    Assignee: CANON MEDICAL SYSTEMS CORPORATION
    Inventors: Shuhei Nitta, Tomoyuki Takeguchi, Nobuyuki Matsumoto
  • Patent number: 10575823
    Abstract: A medical diagnostic apparatus according to one embodiment comprises processing circuitry. The processing circuitry is configured to acquire a three-dimensional shape of a first part based on a contour of the first part in each of a plurality of sectional images intersecting each other along an extending direction of the first part connecting to a cardiac chamber; acquire a three-dimensional shape of a second part, based on a contour of the second part in a sectional image along an extending direction of the second part connecting to the cardiac chamber; and generate a three-dimensional image representing at least some of the first part, the second part, and the cardiac chamber using a three-dimensional shape representing the cardiac chamber and the three-dimensional shapes of the first part and the second part acquired.
    Type: Grant
    Filed: September 29, 2015
    Date of Patent: March 3, 2020
    Assignee: Canon Medical Systems Corporation
    Inventors: Tomoya Okazaki, Yukinobu Sakata, Tomoyuki Takeguchi
  • Publication number: 20200033273
    Abstract: A photon counting X-ray CT apparatus according to an embodiment includes: data acquiring circuitry, and processing circuitry. The data acquiring circuitry is configured to allocate energy measured by signals output from a photon counting detector in response to incidence of X-ray photons to any of a plurality of first energy bins so as to acquire a first data group as count data of each of the first energy bins. The processing circuitry is configured to determine a plurality of second energy bins obtained by grouping the first energy bins in accordance with a decomposition target material that is a material to be decomposed in a imaging region, allocate the first data group to any of the second energy bins so as to generate a second data group, and use the second data group to generate an image representing a distribution of the decomposition target material.
    Type: Application
    Filed: October 1, 2019
    Publication date: January 30, 2020
    Applicant: Canon Medical Systems Corporation
    Inventors: Kenta Moriyasu, Taichiro Shiodera, Shuhei Nitta, Tomoyuki Takeguchi, Hidenori Takeshima, Toshiyuki Ono, Takashi Ida, Hiroaki Nakai
  • Patent number: 10459057
    Abstract: An image processing apparatus according to an embodiment includes processing circuitry. The processing circuitry is configured to detect a region of body fluid flowing in a subject from time-series images acquired by scanning an imaging area including a tagged region to which a tagging pulse is applied and imaging the imaging area; generate a plurality of display images in which the detected body fluid region is displayed in a display mode determined based on a positional relation between the body fluid region and a boundary line, the boundary line determined based on the tagged region; and output time-series display images including the plurality of display images to be displayed on a display.
    Type: Grant
    Filed: August 7, 2015
    Date of Patent: October 29, 2019
    Assignee: TOSHIBA MEDICAL SYSTEMS CORPORATION
    Inventors: Shuhei Nitta, Taichiro Shiodera, Tomoyuki Takeguchi, Masao Yui, Satoshi Sugiura
  • Publication number: 20190324106
    Abstract: According to one embodiment, a magnetic resonance imaging apparatus includes processing circuitry. The processing circuitry estimates transmission inhomogeneity caused in a transmit RF magnetic field from a first image based on a first signal received by a whole-body coil, and estimates reception inhomogeneity caused in a receive RF magnetic field from the first image and a second image based on a second signal received by a surface coil. The processing circuitry generates a third image, having a resolution higher than a resolution of the first image and a resolution of the second image, based on a third signal received by the surface coil. The processing circuitry corrects the third image by using the estimated transmission inhomogeneity and reception inhomogeneity.
    Type: Application
    Filed: April 17, 2019
    Publication date: October 24, 2019
    Applicant: Canon Medical Systems Corporation
    Inventors: Tomoya TSURUYAMA, Shuhei NITTA, Tomoyuki TAKEGUCHI
  • Patent number: 10451568
    Abstract: A photon counting X-ray CT apparatus according to an embodiment includes: data acquiring circuitry, and processing circuitry. The data acquiring circuitry is configured to allocate energy measured by signals output from a photon counting detector in response to incidence of X-ray photons to any of a plurality of first energy bins so as to acquire a first data group as count data of each of the first energy bins. The processing circuitry is configured to determine a plurality of second energy bins obtained by grouping the first energy bins in accordance with a decomposition target material that is a material to be decomposed in a imaging region, allocate the first data group to any of the second energy bins so as to generate a second data group, and use the second data group to generate an image representing a distribution of the decomposition target material.
    Type: Grant
    Filed: August 21, 2015
    Date of Patent: October 22, 2019
    Assignee: Canon Medical Systems Corporation
    Inventors: Kenta Moriyasu, Taichiro Shiodera, Shuhei Nitta, Tomoyuki Takeguchi, Hidenori Takeshima, Toshiyuki Ono, Takashi Ida, Hiroaki Nakai
  • Patent number: 10429466
    Abstract: According to one of embodiments, an MRI apparatus includes at least one receiving coil configured to receive magnetic resonance signals from an object; and processing circuitry configured to generate an image based on the magnetic resonance signals, calculate a weighting map of the image based on at least one of a sensitivity characteristic of the receiving coil and a distance from a magnetic field center, and generate a quantitative susceptibility image, which quantitatively indicates magnetic susceptibility inside a body, from the image by using the weighting map.
    Type: Grant
    Filed: September 29, 2016
    Date of Patent: October 1, 2019
    Assignee: Canon Medical Systems Corporation
    Inventors: Taichiro Shiodera, Tomoyuki Takeguchi
  • Publication number: 20190265320
    Abstract: A magnetic resonance imaging apparatus according to an embodiment includes processing circuitry. The processing circuitry generates a plurality of cross-sectional images for setting a sectional position to be collected in main imaging based on a characteristic portion of a target detected in three-dimensional data. The processing circuitry lists the cross-sectional images on a display and superimposes a mark corresponding to the characteristic portion on at least one of the cross-sectional images. The processing circuitry receives a setting operation to determine the sectional position. The processing circuitry causes, when the mark is selected in the setting operation, a cross-sectional image to be emphasized a sectional position of which is defined using the characteristic portion corresponding to the mark among the listed cross-sectional images. The processing circuitry performs main imaging based on the sectional position after the setting operation.
    Type: Application
    Filed: May 14, 2019
    Publication date: August 29, 2019
    Applicant: CANON MEDICAL SYSTEMS CORPORATION
    Inventors: Shuhei NITTA, Tomoyuki TAKEGUCHI, Yurika OGAWA, Kensuke SHINODA, Takuya FUJIMAKI, Syuhei TAKEMOTO, Shigehide KUHARA
  • Patent number: 10338177
    Abstract: A magnetic resonance imaging apparatus according to an embodiment includes a sequence control unit, an image generating unit, and a deriving unit. The sequence control unit executes first imaging scan for acquiring data of a range including a target internal organ and second imaging scan for acquiring data for a diagnostic image by controlling execution of a pulse sequence. The image generating unit generates an image by using data acquired by the first imaging scan. The deriving unit derives an imaging scan area in which data for the diagnostic image are acquired in the second imaging scan and a related area set associated with the imaging scan area in the second imaging scan, based on image processing using the image.
    Type: Grant
    Filed: August 22, 2014
    Date of Patent: July 2, 2019
    Assignee: TOSHIBA MEDICAL SYSTEMS CORPORATION
    Inventors: Shigehide Kuhara, Shuhei Nitta, Taichiro Shiodera, Tomoyuki Takeguchi
  • Patent number: 10338175
    Abstract: A magnetic resonance imaging apparatus according to an embodiment includes processing circuitry. The processing circuitry generates a plurality of cross-sectional images for setting a sectional position to be collected in main imaging based on a characteristic portion of a target detected in three-dimensional data. The processing circuitry lists the cross-sectional images on a display and superimposes a mark corresponding to the characteristic portion on at least one of the cross-sectional images. The processing circuitry receives a setting operation to determine the sectional position. The processing circuitry causes, when the mark is selected in the setting operation, a cross-sectional image to be emphasized a sectional position of which is defined using the characteristic portion corresponding to the mark among the listed cross-sectional images. The processing circuitry performs main imaging based on the sectional position after the setting operation.
    Type: Grant
    Filed: November 20, 2015
    Date of Patent: July 2, 2019
    Assignee: Toshiba Medical Systems Corporation
    Inventors: Shuhei Nitta, Tomoyuki Takeguchi, Yurika Ogawa, Kensuke Shinoda, Takuya Fujimaki, Syuhei Takemoto, Shigehide Kuhara
  • Publication number: 20190187232
    Abstract: A magnetic resonance imaging apparatus according to an embodiment includes a processor and a memory. The memory stores processor-executable instructions that cause the processor to detect cross-sectional positions of a plurality of cross-sectional images to be acquired in an imaging scan from volume data; acquire the cross-sectional images in sequence based on the cross-sectional positions by executing the imaging scan; and after the first cross-sectional image is acquired in the imaging scan, generate a display image, and display the display image on a display, the display image being an image in which a cross-sectional position of a second cross-sectional image which is detected from the volume data is superimposed on the first cross-sectional image, the second cross-sectional image being a cross-sectional image before being acquired and intersecting with the first cross-sectional image.
    Type: Application
    Filed: February 19, 2019
    Publication date: June 20, 2019
    Inventors: Shuhei NITTA, Shigehide KUHARA, Tomoyuki TAKEGUCHI, Taichiro SHIODERA, Yukinobu SAKATA
  • Patent number: 10215824
    Abstract: A magnetic resonance imaging apparatus according to an embodiment includes a processor and a memory. The memory stores processor-executable instructions that cause the processor to detect cross-sectional positions of a plurality of cross-sectional images to be acquired in an imaging scan from volume data; acquire the cross-sectional images in sequence based on the cross-sectional positions by executing the imaging scan; and after the first cross-sectional image is acquired in the imaging scan, generate a display image, and display the display image on a display, the display image being an image in which a cross-sectional position of a second cross-sectional image which is detected from the volume data is superimposed on the first cross-sectional image, the second cross-sectional image being a cross-sectional image before being acquired and intersecting with the first cross-sectional image.
    Type: Grant
    Filed: December 22, 2014
    Date of Patent: February 26, 2019
    Assignee: TOSHIBA MEDICAL SYSTEMS CORPORATION
    Inventors: Shuhei Nitta, Shigehide Kuhara, Tomoyuki Takeguchi, Taichiro Shiodera, Yukinobu Sakata
  • Patent number: 10204412
    Abstract: A magnetic resonance imaging apparatus according to an embodiment includes processing circuitry. The processing circuitry generates an image based on a magnetic resonance signal from a subject. The processing circuitry generates a susceptibility image representing magnetic susceptibility of the subject from a phase component contained in a plurality of pixels in the image. The processing circuitry generates an artifact component of the susceptibility image based on a frequency signal obtained by frequency transform of the susceptibility image. The processing circuitry generates an artifact component-removed susceptibility image by removing the artifact component from a susceptibility image generated based on the magnetic resonance signal.
    Type: Grant
    Filed: October 28, 2016
    Date of Patent: February 12, 2019
    Assignee: Toshiba Medical Systems Corporation
    Inventors: Taichiro Shiodera, Takamasa Sugiura, Tomoyuki Takeguchi, Masao Yui, Naotaka Sakashita
  • Patent number: 10203385
    Abstract: A magnetic resonance apparatus of the present embodiment includes: a gantry which includes a static field magnet, a gradient coil and an RF coil to image an object; processing circuitry; a memory that stores processor-executable instructions that, when executed by the processing circuitry, cause the processing circuitry to detect at least one position of an aortic valve and a pulmonary valve from three-dimensional image data including a heart of the object, as at least one characteristic region inside the heart, specify a position of an imaging cross-section substantially orthogonal to a bloodstream path inside the heart based on the position of the aortic valve or the pulmonary valve, and cause the gantry to image the imaging cross-section of the object at the specified position of the imaging cross-section.
    Type: Grant
    Filed: December 22, 2015
    Date of Patent: February 12, 2019
    Assignee: TOSHIBA MEDICAL SYSTEMS CORPORATION
    Inventors: Shigehide Kuhara, Shuhei Nitta, Taichiro Shiodera, Yukinobu Sakata, Tomoyuki Takeguchi
  • Patent number: 10203390
    Abstract: A magnetic resonance imaging apparatus according to an embodiment includes a sequence control unit, an image generating unit, and a deriving unit. The sequence control unit executes first imaging scan for acquiring data of a range including a target internal organ and second imaging scan for acquiring data for a diagnostic image by controlling execution of a pulse sequence. The image generating unit generates an image by using data acquired by the first imaging scan. The deriving unit derives an imaging scan area in which data for the diagnostic image are acquired in the second imaging scan and a related area set associated with the imaging scan area in the second imaging scan, based on image processing using the image.
    Type: Grant
    Filed: August 22, 2014
    Date of Patent: February 12, 2019
    Assignee: TOSHIBA MEDICAL SYSTEMS CORPORATION
    Inventors: Shigehide Kuhara, Shuhei Nitta, Taichiro Shiodera, Tomoyuki Takeguchi
  • Publication number: 20190004134
    Abstract: A magnetic resonance imaging apparatus according to an embodiment includes sequence controlling circuitry and processing circuitry. The sequence controlling circuitry acquires first k-space data in units of a plurality of segments while arranging the plurality of segments to overlap one another in a read-out direction, the first k-space being divided into the plurality of segments in the read-out direction. The processing circuitry calculates a weighting coefficient on a basis of information about a gradient magnetic field related to the acquisition and generates second k-space data on a basis of the plurality of segments in the first k-space data and the weighting coefficient.
    Type: Application
    Filed: June 28, 2018
    Publication date: January 3, 2019
    Applicant: Canon Medical Systems Corporation
    Inventors: Yuko HARA, Kanako Saito, Taichiro Shiodera, Tomoyuki Takeguchi, Takashi Shigeta, Masao Yui, Hiroshi Kusahara, Yuki Takai, Yoshimori Kasai
  • Publication number: 20180372824
    Abstract: According to one embodiment, a magnetic resonance imaging apparatus includes sequence control circuitry. The sequence control circuitry acquires magnetic resonance signals corresponding to each of N spokes (N is a natural number of two or more) which is less than the total number of spokes, and thereafter acquires magnetic resonance signals corresponding to each of the N spokes after the N spokes are rotated while maintaining angles between adjacent spokes.
    Type: Application
    Filed: June 20, 2018
    Publication date: December 27, 2018
    Applicant: Canon Medical Systems Corporation
    Inventors: Kanako SAITO, Tomoyuki TAKEGUCHI
  • Publication number: 20180349759
    Abstract: In one embodiment, an image processing system includes a memory and processing circuitry. The memory is configured to store a predetermined program. The processing circuitry is configured, by executing the predetermined program, to perform processing on an input image by exploiting a neural network having an input layer, an output layer, and an intermediate layer provided between the input layer and the output layer, the input image being inputted to the input layer, and adjust an internal parameter based on data related to the input image, while performing the processing on the input image after training of the neural network, the internal parameter being at least one internal parameter of at least one node included in the intermediate layer, and the input parameter having been calculated by the training of the neural network.
    Type: Application
    Filed: May 31, 2018
    Publication date: December 6, 2018
    Applicants: KABUSHIKI KAISHA TOSHIBA, CANON MEDICAL SYSTEMS CORPORATION
    Inventors: Kenzo Isogawa, Tomoyuki Takeguchi
  • Patent number: 10134130
    Abstract: A magnetic-resonance imaging apparatus of an embodiment includes acquiring circuitry and processing circuitry. The acquiring circuitry acquires a magnetic resonance signal that is generated from a subject. The processing circuitry creates a phase image based on the magnetic resonance signal. The processing circuitry sets a combination of a plurality of filters that are used to remove a phase variation derived from a background magnetic field according to a region in the phase image. The processing circuitry removes a phase variation derived from the background magnetic field from the phase image by using the combination of the filters.
    Type: Grant
    Filed: October 28, 2016
    Date of Patent: November 20, 2018
    Assignee: Toshiba Medical Systems Corporation
    Inventors: Takamasa Sugiura, Taichiro Shiodera, Tomoyuki Takeguchi, Yasunori Taguchi, Naotaka Sakashita, Masao Yui