Patents by Inventor Hitoshi Kanazawa

Hitoshi Kanazawa 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: 20220146607
    Abstract: According to one embodiment, a magnetic resonance imaging apparatus includes processing circuitry. The processing circuitry calculates a limit imaging condition based on one or more imaging parameters for determining an imaging condition, the limit imaging condition being an allowable limit relating to heat input to a superconducting magnet. The processing circuitry limits an input range of an imaging parameter input by an operator based on the limit imaging condition.
    Type: Application
    Filed: November 5, 2021
    Publication date: May 12, 2022
    Applicant: Canon Medical Systems Corporation
    Inventors: Hitoshi KANAZAWA, Seiji NOZAKI, Takehiro SHIBUYA
  • Publication number: 20220146610
    Abstract: According to one embodiment, a magnetic resonance imaging apparatus includes processing circuitry. The processing circuitry is configured to calculate an allowable amount of heat input to a superconducting magnet, the allowable amount being allocated to each of a plurality of imagings scheduled during a target period. The processing circuitry is configured to determine an imaging condition based on the allowable amount in the each of the plurality of imagings.
    Type: Application
    Filed: November 5, 2021
    Publication date: May 12, 2022
    Applicant: Canon Medical Systems Corporation
    Inventors: Hitoshi KANAZAWA, Seiji NOZAKI, Takehiro SHIBUYA
  • Patent number: 11129542
    Abstract: According to one embodiment, a magnetic resonance imaging apparatus includes processing circuitry. The processing circuitry collects magnetic resonance data in accordance with a pulse sequence. The processing circuitry determines image quality based on the magnetic resonance data. The processing circuitry selects a re-collection pulse sequence when it is determined that the image quality does not satisfy criteria, the re-collection pulse sequence having at least one of a type of sequence or an imaging condition differing from that of the pulse sequence.
    Type: Grant
    Filed: August 26, 2019
    Date of Patent: September 28, 2021
    Assignee: Canon Medical Systems Corporation
    Inventors: Hidenori Takeshima, Hitoshi Kanazawa
  • Patent number: 10969454
    Abstract: According to one embodiment, a magnetic resonance imaging apparatus includes processing circuitry. The processing circuitry sets an excitation pulse sequence that applies an excitation pulse including an inversion pulse between at least one set of sub pulses of a local excitation radio frequency pulse formed of a plurality of sub pulses, and applies a spoiler gradient magnetic field that disperses transverse magnetization while applying the inversion pulse. The processing circuitry controls execution of the excitation pulse sequence by applying the excitation pulse and the spoiler gradient magnetic field according to the excitation pulse sequence, and collects a magnetic resonance signal based on a data collecting sequence after execution of the excitation pulse sequence.
    Type: Grant
    Filed: August 6, 2019
    Date of Patent: April 6, 2021
    Assignee: Canon Medical Systems Corporation
    Inventor: Hitoshi Kanazawa
  • 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: 20200069214
    Abstract: According to one embodiment, a magnetic resonance imaging apparatus includes processing circuitry. The processing circuitry collects magnetic resonance data in accordance with a pulse sequence. The processing circuitry determines image quality based on the magnetic resonance data. The processing circuitry selects a re-collection pulse sequence when it is determined that the image quality does not satisfy criteria, the re-collection pulse sequence having at least one of a type of sequence or an imaging condition differing from that of the pulse sequence.
    Type: Application
    Filed: August 26, 2019
    Publication date: March 5, 2020
    Applicant: Canon Medical Systems Corporation
    Inventors: Hidenori Takeshima, Hitoshi Kanazawa
  • Publication number: 20200049781
    Abstract: According to one embodiment, a magnetic resonance imaging apparatus includes processing circuitry. The processing circuitry sets an excitation pulse sequence that applies an excitation pulse including an inversion pulse between at least one set of sub pulses of a local excitation radio frequency pulse formed of a plurality of sub pulses, and applies a spoiler gradient magnetic field that disperses transverse magnetization while applying the inversion pulse. The processing circuitry controls execution of the excitation pulse sequence by applying the excitation pulse and the spoiler gradient magnetic field according to the excitation pulse sequence, and collects a magnetic resonance signal based on a data collecting sequence after execution of the excitation pulse sequence.
    Type: Application
    Filed: August 6, 2019
    Publication date: February 13, 2020
    Applicant: Canon Medical Systems Corporation
    Inventor: Hitoshi KANAZAWA
  • Publication number: 20180325411
    Abstract: A medical image diagnosis apparatus according to an embodiment includes processing circuitry. The processing circuitry is configured to derive a subject-specific regression model that indicates a relationship among a cardiac cycle, systole, and diastole of the subject. The processing circuitry is configured to derive timing of a data acquisition in a synchronization imaging performed in synchronization with heartbeats of the heart of the subject, by using the derived regression model and electrocardiographic information of the subject obtained during an image taking process. The processing circuitry is configured to control the synchronization imaging so that the data acquisition is performed with the derived timing.
    Type: Application
    Filed: May 9, 2018
    Publication date: November 15, 2018
    Applicant: Canon Medical Systems Corporation
    Inventors: Ei Nomura, Hitoshi Kanazawa
  • Publication number: 20180279878
    Abstract: In one embodiment, an MRI apparatus is configured to be connected with a pressure device that externally pressures a blood vessel of an object, and includes a scanner configured to perform imaging on the object and processing circuitry. The processing circuitry controls the pressure device in such a manner that ischemia and reperfusion are caused with respect to the object, determines a start timing of the imaging on the basis of a state of pressurization caused by the pressure device, causes the scanner to perform the imaging on the object in accordance with the start timing, and generates an image by using data acquired in the imaging.
    Type: Application
    Filed: April 3, 2018
    Publication date: October 4, 2018
    Applicant: CANON MEDICAL SYSTEMS CORPORATION
    Inventors: Ei NOMURA, Hitoshi KANAZAWA
  • 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: 9700220
    Abstract: A magnetic resonance imaging apparatus includes an imaging condition setting unit, a scan performing unit and a blood flow image generating unit. The imaging condition setting unit sets a sequence accompanying application of a motion probing gradient pulse as an imaging condition. The scan performing unit performs an imaging scan according to the sequence. The blood flow image generating unit generates a blood flow image based on data acquired by the imaging scan.
    Type: Grant
    Filed: April 25, 2007
    Date of Patent: July 11, 2017
    Assignee: TOSHIBA MEDICAL SYSTEMS CORPORATION
    Inventors: Mitsue Miyazaki, Hitoshi Kanazawa
  • 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
  • Patent number: 8903469
    Abstract: A velocity-image creating unit creates a velocity image that indicates a distribution of velocity components with respect to each of a plurality of images obtained by repeating a plurality of number of times Echo Planar Imaging (EPI) that is capable of obtaining velocity components of a Cerebrospinal Fluid (CSF) flowing inside a subject. A velocity-variance image creating unit calculates variance of velocity components along the time sequence by same position on velocity images by using a plurality of created velocity images. A superimposed-image processing unit then superimposes the distribution of the variance of the velocity components according to the velocity-variance image on an average absolute-value image, and an image display unit displays a superimposed image.
    Type: Grant
    Filed: October 2, 2009
    Date of Patent: December 2, 2014
    Assignees: Tokai University Educational Systems, Toshiba Medical Systems Corporation
    Inventors: Shinya Yamada, Hitoshi Kanazawa
  • Patent number: 8903470
    Abstract: A velocity-image creating unit creates a velocity image that indicates a distribution of velocity components with respect to each of a plurality of images obtained by repeating a plurality of number of times Echo Planar Imaging (EPI) that is capable of obtaining velocity components of a Cerebrospinal Fluid (CSF) flowing inside a subject. A velocity-variance image creating unit calculates variance of velocity components along the time sequence by same position on velocity images by using a plurality of created velocity images. A superimposed-image processing unit then superimposes the distribution of the variance of the velocity components according to the velocity-variance image on an average absolute-value image, and an image display unit displays a superimposed image.
    Type: Grant
    Filed: August 9, 2012
    Date of Patent: December 2, 2014
    Assignees: Tokai University Educational Systems, Toshiba Medical Systems Corporation
    Inventors: Shinya Yamada, Hitoshi Kanazawa
  • Patent number: 8836330
    Abstract: According to one embodiment, an MRI apparatus includes a calculation unit and an imaging unit. The calculation unit calculates “a value of a parameter having an upper limit” for “a plurality of patterns of scan orders for a plurality of scan operations for an object” respectively. The imaging unit generates image data for each of the scan operations by performing the plurality of scan operations based on a result of the calculation.
    Type: Grant
    Filed: December 13, 2010
    Date of Patent: September 16, 2014
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Medical Systems Corporation
    Inventor: Hitoshi Kanazawa
  • 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: 8386273
    Abstract: A shared object is newly created in a unified format with respect to past medical information that is effective in a photographing step or a report creating step. Since the shared object can include a position determination image, unique object information, body coordinates information, a photographing condition, a image creating condition, and key image information, it is possible to automatically set the same photographing condition, photographing range, a tomographic position to be photographed, and image creating condition as those in a past test by using the information described above.
    Type: Grant
    Filed: April 9, 2007
    Date of Patent: February 26, 2013
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Medical Systems Corporation
    Inventors: Shigeo Kaminaga, Masahiro Ozaki, Takashi Masuzawa, Akira Iwasa, Hitoshi Kanazawa
  • Publication number: 20120302871
    Abstract: A velocity-image creating unit creates a velocity image that indicates a distribution of velocity components with respect to each of a plurality of images obtained by repeating a plurality of number of times Echo Planar Imaging (EPI) that is capable of obtaining velocity components of a Cerebrospinal Fluid (CSF) flowing inside a subject. A velocity-variance image creating unit calculates variance of velocity components along the time sequence by same position on velocity images by using a plurality of created velocity images. A superimposed-image processing unit then superimposes the distribution of the variance of the velocity components according to the velocity-variance image on an average absolute-value image, and an image display unit displays a superimposed image.
    Type: Application
    Filed: August 9, 2012
    Publication date: November 29, 2012
    Applicants: TOSHIBA MEDICAL SYSTEMS CORPORATION, TOKAI UNIVERSITY EDUCATIONAL SYSTEM
    Inventors: Shinya YAMADA, Hitoshi KANAZAWA