Patents by Inventor Masaaki Umeda

Masaaki Umeda 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: 7612561
    Abstract: A magnetic resonance diagnosing apparatus includes a generating unit which generates a plurality of slice images of a object for an imaging region, a determining unit which determines a plurality of slice regions for spectroscopy within the imaging region, and a measurement unit which measures a magnetic resonance spectrum of the object for each of voxels set on the plurality of determined slice regions.
    Type: Grant
    Filed: August 9, 2007
    Date of Patent: November 3, 2009
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Medical Systems Corporation
    Inventors: Isao Tatebayashi, Kiyomi Ooshima, Masaaki Umeda
  • Publication number: 20090267604
    Abstract: A magnetic resonance imaging apparatus includes a data acquisition unit and an image data generating unit. The data acquisition unit acquires MR signals for imaging by an imaging scan with applying a frequency-selective or slice-selective radio frequency intermediate pulse for controlling a contrast and a spoiler gradient magnetic field for suppressing unnecessary signal component after applying al least one of radio frequency excitation pulses. The image data generating unit generates image data based on the magnetic resonance signals.
    Type: Application
    Filed: April 21, 2009
    Publication date: October 29, 2009
    Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA MEDICAL SYSTEMS CORPORATION
    Inventor: Masaaki UMEDA
  • Publication number: 20090224761
    Abstract: A magnetic resonance imaging apparatus includes a spectrum acquisition unit and a determining unit. The spectrum acquisition unit acquires a frequency spectrum of magnetic resonance signals from a metabolic product in a target region in an object. The determining unit determines one of the numbers of integrations and phase encodes of magnetic resonance signals for obtaining the frequency spectrum depending on a factor influencing the frequency spectrum.
    Type: Application
    Filed: March 9, 2009
    Publication date: September 10, 2009
    Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA MEDICAL SYSTEMS CORPORATION
    Inventor: Masaaki UMEDA
  • Publication number: 20090124885
    Abstract: A apparatus includes a collection unit which collects a magnetic resonance signal, a unit which controls the collection unit in such a manner that pre-scan is executed in regard to pre-scan slices determined as some of main scan slices, a calculation unit which calculates correction amounts based on data concerning the pre-scan slices obtained by the pre-scan, an estimation unit which estimates a correction amount concerning each slice other the pre-scan slices in the main scan slices based on the correction amounts, and a unit which controls the collection unit in such a manner that each of the main scan slices is scanned while involving correction of each slice that is the pre-scan target with the correction amount thereof calculated by the calculation unit and while involving correction of each slice that is not the pre-scan target with the correction amount thereof estimated by the estimation unit.
    Type: Application
    Filed: September 26, 2008
    Publication date: May 14, 2009
    Applicants: Kabushiki Kaisha Toshiba, Toshiba Medical Systems Corporation
    Inventors: Masaaki UMEDA, Toshio Fukuta
  • Publication number: 20080252292
    Abstract: A magnetic resonance diagnosing apparatus includes an imaging unit which images each slice image of a subject in relation to a plurality of different imaging slices, a measurement unit which measures a magnetic resonance spectrum of the subject in relation to a measurement slice, a selection unit which selects slice images corresponding to one or more imaging slices which at least partially overlap the measurement slice from the plurality of slice images, and a creation unit which creates a display image which simultaneously shows the selected one or more slice images and the spectral image.
    Type: Application
    Filed: March 3, 2008
    Publication date: October 16, 2008
    Applicants: TOSHIBA MEDICAL SYSTEMS CORPORATION, KABUSHIKI KAISHA TOSHIBA
    Inventors: Kiyomi OOSHIMA, Isao TATEBAYASHI, Masaaki UMEDA
  • 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
  • Publication number: 20080036458
    Abstract: A magnetic resonance diagnosing apparatus includes a generating unit which generates a plurality of slice images of a object for an imaging region, a determining unit which determines a plurality of slice regions for spectroscopy within the imaging region, and a measurement unit which measures a magnetic resonance spectrum of the object for each of voxels set on the plurality of determined slice regions.
    Type: Application
    Filed: August 9, 2007
    Publication date: February 14, 2008
    Applicants: Kabushiki Kaisha Toshiba, Toshiba Medical Systems Corporation
    Inventors: Isao Tatebayashi, Kiyomi Ooshima, Masaaki Umeda
  • Patent number: 6194899
    Abstract: An absolute temperature measuring pulse sequence is executed and, subsequently, a relative temperature measuring pulse sequence is repeatedly executed. Since while a relative temperature can be measured from phase information, an absolute temperature requires frequency information, a time required in the relative temperature measuring pulse can be made shorter than that required in the absolute temperature measuring pulse sequence. Since the relative temperature reveals a temperature variation, if an absolute temperature at a given time is known, an absolute temperature at a subsequent time can be calculated from the relative temperature. Thus, a local internal temperature of the subject can be measured, with a shorter temporal resolution, with the use of the absolute temperature and relative temperature.
    Type: Grant
    Filed: February 17, 1999
    Date of Patent: February 27, 2001
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yasutoshi Ishihara, Masaaki Umeda, Hidehiro Watanabe, Kazuya Okamoto