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: 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
  • Publication number: 20120302872
    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: Application
    Filed: August 8, 2012
    Publication date: November 29, 2012
    Applicants: TOSHIBA MEDICAL SYSTEMS CORPORATION, KABUSHIKI KAISHA TOSHIBA
    Inventors: Mitsue MIYAZAKI, Hitoshi KANAZAWA
  • Patent number: 8085040
    Abstract: A magnetic resonance imaging apparatus includes an imaging unit which applies a labeling pulse to invert a spin included in a labeling region within part of a imaging region and then collects a echo signal from a time point when an inversion time has passed from the application of the labeling pulse, and a control unit, the control unit controlling the imaging unit so that the echo signal in the imaging region is collected a plurality of times with variations in the inversion time, the control unit also controlling the imaging unit so that a time ranging from a reference time point within a biological signal obtained from a subject to the application of the labeling pulse is a time determined in accordance with the inversion time.
    Type: Grant
    Filed: October 21, 2010
    Date of Patent: December 27, 2011
    Assignees: Tokai University Educational System, Toshiba Medical Systems Corporation
    Inventors: Shinya Yamada, Hitoshi Kanazawa, Tokunori Kimura, Masaaki Umeda
  • Publication number: 20110148412
    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: Application
    Filed: December 13, 2010
    Publication date: June 23, 2011
    Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA MEDICAL SYSYEMS CORPORATION
    Inventor: Hitoshi KANAZAWA
  • Publication number: 20110037466
    Abstract: A magnetic resonance imaging apparatus includes an imaging unit which applies a labeling pulse to invert a spin included in a labeling region within part of a imaging region and then collects a echo signal from a time point when an inversion time has passed from the application of the labeling pulse, and a control unit, the control unit controlling the imaging unit so that the echo signal in the imaging region is collected a plurality of times with variations in the inversion time, the control unit also controlling the imaging unit so that a time ranging from a reference time point within a biological signal obtained from a subject to the application of the labeling pulse is a time determined in accordance with the inversion time.
    Type: Application
    Filed: October 21, 2010
    Publication date: February 17, 2011
    Applicants: TOKAI UNIVERSITY EDUCATIONAL SYSTEM, TOSHIBA MEDICAL SYSTEMS CORPORATION
    Inventors: Shinya Yamada, Hitoshi Kanazawa, Tokunori Kimura, Masaaki Umeda
  • Patent number: 7880464
    Abstract: A magnetic resonance imaging apparatus includes an imaging unit which applies a labeling pulse to invert a spin included in a labeling region within part of a imaging region and then collects a echo signal from a time point when an inversion time has passed from the application of the labeling pulse, and a control unit, the control unit controlling the imaging unit so that the echo signal in the imaging region is collected a plurality of times with variations in the inversion time, the control unit also controlling the imaging unit so that a time ranging from a reference time point within a biological signal obtained from a subject to the application of the labeling pulse is a time determined in accordance with the inversion time.
    Type: Grant
    Filed: September 10, 2007
    Date of Patent: February 1, 2011
    Assignees: Tokai University Educational System, Toshiba Medical Systems Corporation
    Inventors: Shinya Yamada, Hitoshi Kanazawa, Tokunori Kimura, Masaaki Umeda
  • Publication number: 20100087730
    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: October 2, 2009
    Publication date: April 8, 2010
    Applicants: TOSHIBA MEDICAL SYSTEMS CORPORATION, TOKAI UNIVERSITY EDUCATIONAL SYSTEMS
    Inventors: Shinya Yamada, Hitoshi Kanazawa
  • Patent number: 7663365
    Abstract: A magnetic resonance imaging apparatus includes an imaging unit which performs imaging more than once with respect to an imaging target while changing a central frequency of a fat suppression pulse, a generation unit which generates a plurality of images based on magnetic resonance signals obtained by imaging performed more than once, and a calculation unit which calculates factor information of spatial inhomogeneity of a fat suppression effect based on the plurality of images.
    Type: Grant
    Filed: September 24, 2008
    Date of Patent: February 16, 2010
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Medical Systems Corporation
    Inventor: Hitoshi Kanazawa
  • Patent number: 7623901
    Abstract: In the black blood method using a double inversion pulse, images in the systole of the cardiac cycle can be captured in a reliable manner even in the presence of a cycle-to-cycle variance in the heart beat cycle. A pulse sequence of the black blood method composed of a double inversion pulse DIV and an imaging pulse train SEQima is used. This sequence is applied in sync with an ECG signal of a subject to be imaged, and magnetic resonance imaging is thereby performed. The double inversion DIV is applied in sync with an R-wave:R1 appearing on the ECG signal at a given timing, with a first delay time td1 (fixed value), and the imaging pulse train SEQima is applied in sync with the following R-wave:R2 with a second delay time td2 (fixed value: set in accordance with the systole). A variance of the cardiac cycle is absorbed in an inversion time BBTI.
    Type: Grant
    Filed: November 15, 2001
    Date of Patent: November 24, 2009
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Hitoshi Kanazawa
  • Patent number: 7613496
    Abstract: A magnetic resonance imaging apparatus includes a blood flow velocity acquiring unit that acquires a flow velocity of the blood flow of an object, a capturing condition setting unit that, on the basis of the flow velocity of the blood flow acquired by the blood flow velocity acquiring unit, sets at least one of a transmitting phase of a transmitted exciting pulse, a transmitting phase of a refocusing pulse, a shift amount of the relative phase difference between the transmitted exciting phase and the refocusing pulse, and an intensity of a gradient pulse in a readout direction as a capturing condition, and a blood flow image capturing unit that creates a blood flow image of the object by performing an imaging scan on the basis of the capturing condition set by the capturing condition setting unit.
    Type: Grant
    Filed: September 21, 2006
    Date of Patent: November 3, 2009
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Medical Systems Corporation
    Inventors: Mitsue Miyazaki, Hitoshi Kanazawa
  • Patent number: 7557575
    Abstract: A magnetic resonance imaging apparatus includes a data acquisition unit, a frequency offset acquisition unit, a frequency modulation unit and a phase shift correction unit. The data acquisition unit acquires pieces of echo data due to nuclear magnetic resonance after applying an excitation pulse. The frequency offset acquisition unit acquires a frequency offset. The frequency modulation unit frequency-modulates the excitation pulse according to the frequency offset. The phase shift correction unit cancels a phase shift occurring on each of the pieces of the echo data due to a frequency modulation according to the frequency offset during a readout of the pieces of the echo data.
    Type: Grant
    Filed: March 27, 2007
    Date of Patent: July 7, 2009
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Medical Systems Corporation
    Inventors: Masashi Ookawa, Hitoshi Kanazawa
  • Publication number: 20090085566
    Abstract: A magnetic resonance imaging apparatus includes an imaging unit which performs imaging more than once with respect to an imaging target while changing a central frequency of a fat suppression pulse, a generation unit which generates a plurality of images based on magnetic resonance signals obtained by imaging performed more than once, and a calculation unit which calculates factor information of spatial inhomogeneity of a fat suppression effect based on the plurality of images.
    Type: Application
    Filed: September 24, 2008
    Publication date: April 2, 2009
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventor: Hitoshi Kanazawa
  • Publication number: 20080161678
    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: Application
    Filed: July 3, 2007
    Publication date: July 3, 2008
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Mitsue Miyazaki, Hitoshi Kanazawa
  • Publication number: 20080061780
    Abstract: A magnetic resonance imaging apparatus includes an imaging unit which applies a labeling pulse to invert a spin included in a labeling region within part of a imaging region and then collects a echo signal from a time point when an inversion time has passed from the application of the labeling pulse, and a control unit, the control unit controlling the imaging unit so that the echo signal in the imaging region is collected a plurality of times with variations in the inversion time, the control unit also controlling the imaging unit so that a time ranging from a reference time point within a biological signal obtained from a subject to the application of the labeling pulse is a time determined in accordance with the inversion time.
    Type: Application
    Filed: September 10, 2007
    Publication date: March 13, 2008
    Applicants: Tokai University Educational System, Toshiba Medical Systems Corporation
    Inventors: Shinya Yamada, Hitoshi Kanazawa, Tokunori Kimura, Masaaki Umeda
  • Patent number: 7294673
    Abstract: A method of modifying a polymeric material whereby the polymeric material is modified to give a highly durable surface without decreasing its strength. Namely, a polymeric material is modified by the method comprising a combination of an impregnation step, an activation step, a step of grafting a monomer and a step of a treatment with a hydrophilic polymer. Thus, the hydrophilic nature, adhesiveness, and so forth of polymeric materials such as polyolefins can be improved without causing any decrease in the practical strength. The thus obtained polymeric materials are usable in articles with a need for high water absorptivity and high adhesiveness, for example, water-absorbing materials and water-retaining materials for medical, sanitary, cosmetic articles or supplies, agricultural materials, synthetic papers, filters and fiber products for clothes, for improving adhesiveness of composite materials and the like.
    Type: Grant
    Filed: June 28, 2002
    Date of Patent: November 13, 2007
    Assignee: FiberMark Gessner GmbH & Co.
    Inventor: Hitoshi Kanazawa
  • Publication number: 20070238963
    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: Application
    Filed: April 9, 2007
    Publication date: October 11, 2007
    Inventors: Shigeo Kaminaga, Masahiro Ozaki, Takashi Masuzawa, Akira Iwasa, Hitoshi Kanazawa
  • Publication number: 20070229075
    Abstract: A magnetic resonance imaging apparatus includes a data acquisition unit, a frequency offset acquisition unit, a frequency modulation unit and a phase shift correction unit. The data acquisition unit acquires pieces of echo data due to nuclear magnetic resonance after applying an excitation pulse. The frequency offset acquisition unit acquires a frequency offset. The frequency modulation unit frequency-modulates the excitation pulse according to the frequency offset. The phase shift correction unit cancels a phase shift occurring on each of the pieces of the echo data due to a frequency modulation according to the frequency offset during a readout of the pieces of the echo data.
    Type: Application
    Filed: March 27, 2007
    Publication date: October 4, 2007
    Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA MEDICAL SYSTEMS CORPORATION
    Inventors: Masashi Ookawa, Hitoshi Kanazawa
  • Patent number: 7218108
    Abstract: A magnetic resonance imaging apparatus includes: a sensitivity map database that stores sensitivity map data of a multi-coil including plural coils necessary for parallel imaging unfolding processing; a data slicing unit that slices partial data from three-dimensional volume data collected for the respective coils by parallel imaging, respectively; an intermediate image reconstructing unit that executes reconstruction processing for the partial data to thereby reconstruct intermediate images for the respective coils; and a reference image generating unit that slices sensitivity map data corresponding to the intermediate images from the sensitivity map database as sensitivity map data for unfolding processing, executes the parallel imaging unfolding processing for the intermediate images using the sensitivity map data for unfolding processing, and generates reference images.
    Type: Grant
    Filed: January 12, 2005
    Date of Patent: May 15, 2007
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Medical Systems Corporation
    Inventors: Nobuyasu Ichinose, Yoshio Machida, Hitoshi Kanazawa, Shinichi Uchizono