Patents by Inventor Tetsuya Kawagishi

Tetsuya Kawagishi 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: 7588538
    Abstract: After the establishment of the saturation state of a contrast medium which has flowed into a subject for scanning inside a patient given the contrast medium, scan is performed under a high acoustic pressure adapted to break the bubbles of the contrast medium, so as to refresh the section for the scanning, and to acquire the maximum value of echo signal intensities. Subsequently, scans by ultrasounds under a low acoustic pressure or a medium acoustic pressure which does not break the contrast medium are carried out a plurality of times at different timings, thereby to execute a scan sequence for acquiring in-vivo information necessary for a TIC analysis. Data obtained by the scans are analyzed in a blood-flow-index estimation unit, and are displayed in a predetermined scheme.
    Type: Grant
    Filed: September 10, 2004
    Date of Patent: September 15, 2009
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Medical Systems Corporation
    Inventors: Yoichi Ogasawara, Tetsuya Kawagishi, Naohisa Kamiyama
  • Publication number: 20090204000
    Abstract: An ultrasonic diagnostic apparatus includes an image creating unit configured to create an image of an affected area and an image of a puncture needle inserted into a subject by means of an ultrasonic scanning operation, and a monitor configured to display the image of the affected area and the image of the puncture needle created by the image creating unit, wherein the image creating unit displays a tissue expected to be extracted from the affected area as an image on the monitor before the puncture needle is inserted into the affected area.
    Type: Application
    Filed: February 3, 2009
    Publication date: August 13, 2009
    Inventors: Yoko Okamura, Naohisa Kamiyama, Tetsuya Yoshida, Yasuhiko Abe, Tetsuya Kawagishi
  • Publication number: 20090198133
    Abstract: An ultrasonic diagnostic apparatus capable of measuring a three-dimensional motion of a biological tissue in a short time. An image processor creates volume data based on image data of a B-mode image of a biological tissue and creates image data of a series of tomographic images in time series for the respective two or more sectional positions based on the volume data. A controller displays one tomographic image for each sectional position on a display part. A user operates an operation part to designate a measurement image region on the displayed tomographic image. A displacement calculating part calculates a displacement in time series of the designated measurement image region for each sectional position. A motion information calculating part calculates motion information of the biological tissue based on the displacement of the measurement image region calculated for each sectional position.
    Type: Application
    Filed: May 30, 2007
    Publication date: August 6, 2009
    Applicants: Kabushiki Kaisha Toshiba, Toshiba Medical Systems Corporation
    Inventors: Tetsuya Kawagishi, Yasuhiko Abe
  • Publication number: 20090163815
    Abstract: A motion parameter measuring unit two-dimensionally measures a motion parameter of a myocardial tissue by a tracking process on time-series ultrasonic image data acquired by transmission and reception of ultrasonic waves to and from a sample. On the other hand, a time phase setting unit adds a diastolic heartbeat time phase, which is set on the basis of a systole end specified by a time phase where a cardiac cavity area of the ultrasonic image data is the smallest and a diastole end specified by an R wave in an electrocardiographic waveform of the sample, relative to the systole end to time-series parameter image data generated by a parameter image data generating unit on the basis of the motion parameter. An image data extracting unit extracts parameter image data to which the diastolic heartbeat time phase closest to a desired diastolic heartbeat time phase set by an input unit is added and displays the extracted parameter image data on a display unit.
    Type: Application
    Filed: December 17, 2008
    Publication date: June 25, 2009
    Inventors: Tetsuya Kawagishi, Yasuhiko Abe, Hiroyuki Ohuchi, Katsuhisa Ishii
  • Publication number: 20090112088
    Abstract: An ultrasonic diagnostic apparatus includes a displacement measuring unit, a motor information measuring unit, a comparison parameter calculation unit and a parameter image data generating unit. The displacement measuring unit two-dimensionally measures displacements of a myocardial tissue in pieces of ultrasonic image data adjacent in time direction. The motor information measuring unit measures strains and strain rates of the myocardial tissue based on the displacements as motor information. The comparison parameter calculation unit calculates comparison parameters based on the strain rates, or the strains and strain rates. The parameter image data generating unit generates parameter image data using the comparison parameters.
    Type: Application
    Filed: October 28, 2008
    Publication date: April 30, 2009
    Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA MEDICAL SYSTEMS CORPORATION
    Inventors: Hiroyuki Ohuchi, Yasuhiko Abe, Tetsuya Kawagishi
  • Publication number: 20090060306
    Abstract: A contour specifying part receives volume data representing a subject acquired by transmission of ultrasonic waves to the subject, and specifies a 3-dimensional contour of a myocardium based on the volume data. A forming part sets a reference point on the contour of the myocardium, and forms an image generation plane including a plane substantially orthogonal to the contour of the myocardium at the reference point. An image generator generates image data on the image generation plane based on the volume data. A display controller controls a display to display an image based on the image data.
    Type: Application
    Filed: August 18, 2008
    Publication date: March 5, 2009
    Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA MEDICAL SYSTEMS CORPORATION
    Inventors: Hiroyuki OHUCHI, Tetsuya Kawagishi, Yasuhiko Abe, Masahide Nishiura, Tomoyuki Takeguchi
  • Publication number: 20090024031
    Abstract: An ultrasonic diagnostic apparatus includes an ultrasonic transmission/reception unit and an image generating unit. The ultrasonic transmission/reception unit transmits a first ultrasonic pulse having a maximum amplitude in a positive pressure, a second ultrasonic pulse having a maximum amplitude in a negative pressure and a third ultrasonic pulse derived by compounding the first ultrasonic pulse with the second ultrasonic pulse into an object in which a contrast medium is injected and obtains first, second and third reception echoes corresponding to the first, second and third ultrasonic pulses respectively. The image generating unit generates a compounded signal which is a nonlinear component from the contrast medium by a linear calculation of the first, second and third reception echoes and generates image data of the object by using the compounded signal.
    Type: Application
    Filed: July 15, 2008
    Publication date: January 22, 2009
    Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA MEDICAL SYSTEMS CORPORATION
    Inventors: Hiroyuki Ohuchi, Tetsuya Kawagishi, Tomohisa Imamura
  • Publication number: 20080317316
    Abstract: Obtains the position of each of points composing the contour of a specific tissue shown in ultrasonic image data having been acquired at each time phase by pattern matching for each time phase. Obtains motion information of each of parts composing the specific tissue based on the position of each of the points composing the contour. For each time phase, obtain the differential value of the motion information of each of the parts by differentiating the motion information of each of the parts by time, and normalizes the differential value of the motion information. Assigns a color corresponding to the magnitude of the normalized differential value of the motion information to each of the parts displays an ultrasonic image at each time phase and furthermore display each of the parts of the specific tissue shown in the ultrasonic image of each time phase in the assign color.
    Type: Application
    Filed: June 23, 2008
    Publication date: December 25, 2008
    Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA MEDICAL SYSTEMS CORPORATION
    Inventors: Hiroyuki Ohuchi, Yasuhiko Abe, Tetsuya Kawagishi
  • Publication number: 20080267482
    Abstract: Three slices, i.e., Basal, Mid, and Apical slices, which correspond to clinically useful ASE segmentation are designated, and the positions of the three slices are tracked through at least one cardiac cycle by performing three-dimensional speckle tracking in the remaining time phases. Three C-mode projection images concerning the tracked positions are reconstructed. In addition, arbitrary myocardial wall motion parameters at the tracked positions are computed and displayed upon being superimposed on C-mode images or projected/displayed on a polar map. As a C-mode projection image method, one of the following techniques can be used detecting and projecting only movement components perpendicular to slices determined in an initial time phase, detecting and projecting average movement components of the respective walls, and tracking and projecting each myocardial position. The obtained C-mode images are simultaneously displayed together with markers indicating the positions of long-axis images and C-mode images.
    Type: Application
    Filed: April 25, 2008
    Publication date: October 30, 2008
    Inventors: Yasuhiko ABE, Tetsuya Kawagishi
  • Publication number: 20080262348
    Abstract: An ultrasonic diagnostic apparatus generates volume data by performing three-dimensional scan of a three-dimensional region with an ultrasonic wave. An input unit sets or changes at least one of a plurality of correlated scan conditions for the three-dimensional scan. A determination unit determines the other scan conditions of the plurality of scan conditions on the basis of at least one scan condition that is set or changed. A display unit displays at least one of the set or changed scan condition and the determined scan conditions.
    Type: Application
    Filed: April 21, 2008
    Publication date: October 23, 2008
    Inventors: Shinichi HASHIMOTO, Tetsuya KAWAGISHI, Takuya SASAKI
  • Publication number: 20080077013
    Abstract: An ultrasound diagnostic apparatus 1 comprises an ultrasonic probe 2 for transmitting the ultrasound while three-dimensionally scanning, and receiving ultrasound reflected from biological tissue, an image processor 5 (and a signal processor 4) for generating image data for an MPR image based on results received thereof, an information memory 6 for storing cross-sectional-position information D showing a cross-section of this MPR image, a display part 81, and a controller 9. The image processor 5 generates image data for the new MPR image for the relevant cross-sectional position, based on the cross-sectional position shown in the cross-sectional-position information D1 obtained when the MPR image was obtained in the past and the received results obtained by the new three-dimensional scan performed with the ultrasonic probe 2. The controller 9 causes the display part 81 to display the new MPR image.
    Type: Application
    Filed: September 27, 2007
    Publication date: March 27, 2008
    Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA MEDICAL SYSTEMS CORPORATION
    Inventors: Tetsuya KAWAGISHI, Yasuhiko Abe, Shinichi Hashimoto, Muneki Kataguchi
  • Publication number: 20080051661
    Abstract: An ultrasonic diagnostic apparatus includes a Doppler velocity information acquiring unit, a region-of-interest-setting unit and an instantaneous flow calculating unit. The Doppler velocity information acquiring unit is configured to acquire three-dimensional Doppler velocity information from an object by a three-dimensional scan with transmission and reception of an ultrasonic wave. The region-of-interest-setting unit is configured to set a region of interest spatially. The instantaneous flow calculating unit is configured to calculate an instantaneous blood flow in the region of interest with using the three-dimensional Doppler velocity information.
    Type: Application
    Filed: August 24, 2007
    Publication date: February 28, 2008
    Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA MEDICAL SYSTEMS CORPORATION
    Inventors: Muneki KATAGUCHI, Tetsuya KAWAGISHI, Yasuhiko ABE, Shinichi HASHIMOTO
  • Publication number: 20080051663
    Abstract: The difference frequency component between a first fundamental wave of frequency f and a second fundamental wave of frequency f2 is caused to interact with a second harmonic wave, thereby to attain the enhancement of a second harmonic signal, etc., whereby a reflected wave component to be imaged is extracted at a high S/N ratio. By way of example, in a case where the difference frequency component is to appear on the lower frequency side of the second harmonic wave of the first fundamental wave so as to be superposed on this second harmonic wave, the frequencies are set at f2=2.8 f or so. Besides, in a case where the difference frequency component is to appear on the higher frequency side of the second harmonic wave of the first fundamental wave so as to be superposed on this second harmonic wave, the frequencies are set at f2=3.2 f or so.
    Type: Application
    Filed: October 25, 2007
    Publication date: February 28, 2008
    Inventors: Tetsuya KAWAGISHI, Tomohisa Imamura, Naohisa Kamiyama
  • Publication number: 20070282203
    Abstract: There is provided an ultrasonic wave diagnosis instrument. The ultrasonic wave Doppler diagnosis instrument transmits an ultrasonic continuous wave in a range direction and receives a reflective wave of the ultrasonic continuous wave. The ultrasonic wave Doppler diagnosis instrument includes: a modulation unit that subjects the ultrasonic continuous wave to frequency modulation such that a phase is varied in accordance with the distance of the range direction; a demodulation unit that demodulates the reflective wave for each range of the range direction while interlocking with the frequency modulation, and generates a reception signal in the range in a separated state; and a presentation unit that presents information by using a signal of a Doppler component based on the reception signal.
    Type: Application
    Filed: October 19, 2005
    Publication date: December 6, 2007
    Applicants: Kabushiki Kaisha Toshiba, TOSHIBA MEDICAL SYSTEMS CORPORATION
    Inventors: Tatsuro Baba, Yasuo Miyajima, Takeshi Sato, Tetsuya Kawagishi, Yasutsugu Seo, Yoshitaka Mine
  • Patent number: 7303529
    Abstract: The difference frequency component between a first fundamental wave of frequency f and a second fundamental wave of frequency f2 is caused to interact with a second harmonic wave, thereby to attain the enhancement of a second harmonic signal, etc., whereby a reflected wave component to be imaged is extracted at a high S/N ratio. By way of example, in a case where the difference frequency component is to appear on the lower frequency side of the second harmonic wave of the first fundamental wave so as to be superposed on this second harmonic wave, the frequencies are set at f2=2.8f or so. Besides, in a case where the difference frequency component is to appear on the higher frequency side of the second harmonic wave of the first fundamental wave so as to be superposed on this second harmonic wave, the frequencies are set at f2=3.2f or so.
    Type: Grant
    Filed: March 12, 2004
    Date of Patent: December 4, 2007
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Medical Systems Corporation
    Inventors: Tetsuya Kawagishi, Tomohisa Imamura, Naohisa Kamiyama
  • Publication number: 20070265530
    Abstract: An ultrasonic imaging apparatus comprises an ultrasonic probe, an image-processing part, a received signal intensity-adjusting part, and a display part. The ultrasonic probe three-dimensionally transmits/receives ultrasonic waves. The image-processing part generates a first ultrasonic image along a plane intersecting the scanning lines of ultrasonic waves, based on the signals obtained by transmitting/receiving of the ultrasonic waves. The signal intensity-adjusting part changes the intensity of the signals on the scanning lines passing through a brightness adjustment range for brightness adjustment set on the first ultrasonic image. The image-processing part generates a second ultrasonic image, based on the signal changed by the signal intensity-adjusting part. The display part displays the second ultrasonic image.
    Type: Application
    Filed: April 23, 2007
    Publication date: November 15, 2007
    Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA MEDICAL SYSTEMS CORPORATION
    Inventors: Shinichi Hashimoto, Tetsuya Kawagishi
  • Publication number: 20070197916
    Abstract: An ultrasonic diagnostic apparatus comprises a first reception echo obtaining unit, a second reception echo obtaining unit, a reception echo combining unit, and an image generating unit. The first reception echo obtaining unit transmits a plurality of ultrasonic pulses having frequency spectra different from one another to an object, and obtains each of reception echoes corresponding to the plurality of ultrasonic pulses. The second reception echo obtaining unit transmits an ultrasonic pulse having the same frequency component characteristics as an combined pulse obtained by combining the plurality of ultrasonic pulses, and to obtain an reception echo. The reception echo combining unit combines the reception echoes obtained by the first reception echo obtaining unit and the reception echo obtained by the second reception echo obtaining unit to generate a combined signal. The image generating unit generates an image of echoes reflected from the object on the basis of the combined signal.
    Type: Application
    Filed: January 26, 2007
    Publication date: August 23, 2007
    Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA MEDICAL SYSTEMS CORPORATION
    Inventors: Tetsuya Kawagishi, Hiroyuki Ohuchi, Takeshi Sato, Makoto Hirama, Tomohisa Imamura
  • Publication number: 20070167777
    Abstract: Motion information of a tissue at a plurality of positions in a subject to be examined which is obtained by transmission/reception of an ultrasonic wave is acquired. This information includes, for example, a quantitative value associated with the strain of the tissue in the subject or a quantitative value associated with a displacement in the subject. A predetermined motion timing of the subject is calculated on the basis of the motion information of the tissue. A first image for indicating the motion timings of the tissue at a plurality of positions in the subject is generated.
    Type: Application
    Filed: September 21, 2006
    Publication date: July 19, 2007
    Inventors: Yasuhiko ABE, Tetsuya Kawagishi
  • Publication number: 20070167780
    Abstract: An ultrasonic diagnostic scanner is provided which includes a transmitting and receiving unit that transmits two kinds of ultrasonic waves with inverted phases to each of a plurality of scanning lines and receives first and second echo signals corresponding to the two kinds of ultrasonic waves from one scanning line to another, a first adder that obtains a third echo signal by adding up the first and second echo signals for each scanning line, a first signal generating unit that generates a first processed signal from the first echo signal and a second processed signal from the third echo signal, a second adder that generates a third processed signal from the first and second processed signals, an image processor that generates an ultrasonic image from the third processed signal, and an display monitor that displays the ultrasonic image.
    Type: Application
    Filed: November 21, 2006
    Publication date: July 19, 2007
    Inventors: Tomohisa IMAMURA, Tetsuya Kawagishi, Fumiyasu Sakaguchi
  • Publication number: 20070118041
    Abstract: A heart function analysis apparatus adapted to analyze a motion of a heart by using time-series image data representing an image of the heart. The heart function analysis apparatus includes a strain-value acquisition unit configured to acquire time-series strain values in thickness of a heart muscle from the time-series image data, a normalized strain value calculation unit configured to normalize the time-series strain values, and an output unit configured to output the time-series normalized strain values.
    Type: Application
    Filed: October 31, 2006
    Publication date: May 24, 2007
    Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA MEDICAL SYSTEMS CORPORATION
    Inventors: Masahide Nishiura, Yasuhiko Abe, Tetsuya Kawagishi, Ryoichi Kanda