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: 8167807
    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 from a sample. 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.
    Type: Grant
    Filed: December 17, 2008
    Date of Patent: May 1, 2012
    Assignees: Toshiba Medical Systems Corporation, The Kansai Electric Power Co., Inc.
    Inventors: Tetsuya Kawagishi, Yasuhiko Abe, Hiroyuki Ohuchi, Katsuhisa Ishii
  • Publication number: 20110319761
    Abstract: According to one embodiment, an ultrasonic diagnostic apparatus comprises a data acquisition unit configured to scan a region which includes at least part of a heart of an object and acquire ultrasonic data associated with the region, a curve acquisition unit configured to acquire temporal change curves of a wall motion parameter associated with a plurality of regions of the heart by using the ultrasonic data associated with the region to be scanned and a value acquisition unit configured to acquire an index value associated with cardiac wall motion by calculating a difference value of the wall motion parameter of two arbitrary regions, of the plurality of regions of the heart, at each phase in an analysis period by using temporal change curves associated with the two arbitrary regions, calculating a total sum of the difference values in the analysis period, and normalizing the total sum with a predetermined value.
    Type: Application
    Filed: June 23, 2011
    Publication date: December 29, 2011
    Applicants: TOSHIBA MEDICAL SYSTEMS CORPORATION, KABUSHIKI KAISHA TOSHIBA
    Inventors: Yasuhiko ABE, Tetsuya KAWAGISHI
  • Patent number: 8055040
    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: Grant
    Filed: June 23, 2008
    Date of Patent: November 8, 2011
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Medical Systems Corporation
    Inventors: Hiroyuki Ohuchi, Yasuhiko Abe, Tetsuya Kawagishi
  • Patent number: 8047992
    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: Grant
    Filed: April 23, 2007
    Date of Patent: November 1, 2011
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Medical Systems Corporation
    Inventors: Shinichi Hashimoto, Tetsuya Kawagishi
  • Publication number: 20110190633
    Abstract: According to one embodiment, an image processing apparatus includes a storage unit, setting unit, associating unit, and registering unit. The storage unit stores 2D or 3D first time series image data and second time series image data over a predetermined period. The setting unit sets a first ROI on the first image data and a second ROI on the second image data for each of a plurality of phases in the predetermined period in accordance with a user instruction or by image processing. The associating unit associates the set first ROI with the set second ROI for each of the plurality of phases. The registering unit registers the first image data and the second image data for each of the plurality of phases based on a relative positional relationship between the first ROI and the second ROI which are associated with each other.
    Type: Application
    Filed: February 1, 2011
    Publication date: August 4, 2011
    Inventors: Tetsuya Kawagishi, Yasuhiko Abe
  • Publication number: 20110190634
    Abstract: In general, according to one embodiment, an ultrasonic diagnostic apparatus includes an image generating unit configured to generate medical images from a multislice which covers an area including the heart of an object. Each slice is almost perpendicular to the long axis of the heart. Each medical image is a short-axis image of the heart. A series of medical images captured at different times correspond to each slice. The embodiment generates a polar map associated with myocardial motion indices from a plurality of medical images. A polar map is segmented into segments. The embodiment calculates the average value of motion indices for each segment. The utility of an average value depends on the range covered by each segment. This embodiment matches the boundary of a segment with the position of a vein. This prevents a deterioration in the utility of average values due to the influences of veins.
    Type: Application
    Filed: February 2, 2011
    Publication date: August 4, 2011
    Inventors: Tetsuya Kawagishi, Susumu Uchiyama, Shunsuke Satoh, Shinichi Hashimoto, Yasuhiko Abe, Hiroyuki Ohuchi
  • Patent number: 7985183
    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: October 25, 2007
    Date of Patent: July 26, 2011
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Medical Systems Corporation
    Inventors: Tetsuya Kawagishi, Tomohisa Imamura, Naohisa Kamiyama
  • Publication number: 20100305445
    Abstract: According to one embodiment, an ultrasonic diagnosis apparatus includes a display unit to display an ultrasonic image, a comparison unit to compare the signal/echo intensity of a cardiac chamber portion of an ultrasonic image with the signal/echo intensity of a myocardial portion of the image, and an indication generating unit to generate a specific indication at a time point when the signal/echo intensity of the cardiac chamber portion changes from a higher value to a lower value than the signal/echo intensity of the myocardial portion or at another time point with reference to the time point.
    Type: Application
    Filed: June 1, 2010
    Publication date: December 2, 2010
    Inventors: Tetsuya KAWAGISHI, Katsuhisa Ishii
  • Patent number: 7824337
    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: Grant
    Filed: September 21, 2006
    Date of Patent: November 2, 2010
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Medical Systems Corporation
    Inventors: Yasuhiko Abe, Tetsuya Kawagishi
  • Publication number: 20100195887
    Abstract: Based on medical image data acquired in each time phase included in a one-cycle interval, first tracking part tracks the position of a first region of interest set in a first time phase in each time phase and tracks the position of a second region of interest set in a second time phase in each time phase. Based on position information of the first region of interest and the second region of interest in each time phase, position correction part obtains position information of a region of interest in each time phase so that it passes through the position of the first region of interest in the first time phase and the position of the second region of interest in the second time phase. Motion-information calculator obtains motion information of a tissue based on the obtained position information.
    Type: Application
    Filed: January 26, 2010
    Publication date: August 5, 2010
    Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA MEDICAL SYSTEMS CORPORATION
    Inventors: Yasuhiko Abe, Tetsuya Kawagishi
  • Publication number: 20100198072
    Abstract: In the case where a tracking process of a moving tissue performing a contraction movement and an expansion movement and represented by a cardiac wall is performed for one heartbeat from the ED1 to the ED2, a contour position (tracking point) initially set at the ES (End-Systole) is tracked until ED1 in accordance with movement information, the tracking point is rearranged and a position of a middle layer is set at the ED (End-Diastole), the rearranged tracking point including the position of the middle layer is tracked in accordance with the movement information already obtained, and then the tracking point is further tracked in the normal direction until the ED2.
    Type: Application
    Filed: January 28, 2010
    Publication date: August 5, 2010
    Inventors: Yasuhiko ABE, Tetsuya Kawagishi
  • Publication number: 20100198071
    Abstract: Position coordinate information of each point three-dimensionally forming a tissue corresponding to a diagnosis target at each time phase is obtained, a quantitative value for evaluating the movement of the tissue corresponding to the diagnosis target is calculated by using the position information, and the result is output in a predetermined form. Accordingly, since the quantitative value for evaluating the movement is calculated by using the three-dimensional position coordinate information without converting wall movement information obtained by a three-dimensional tracking process into two-dimensional information, it is possible to provide medical information with a higher degree of precision.
    Type: Application
    Filed: January 22, 2010
    Publication date: August 5, 2010
    Inventors: Hiroyuki OHUCHI, Shinichi Hashimoto, Yasuhiko Abe, Tetsuya Kawagishi
  • Patent number: 7749167
    Abstract: An ultrasonic diagnosis apparatus and method wherein both imaging of a contrast effect and imaging of a tissue appearance before and after inflow of a contrast medium can be realized on condition that low-power transmission and a high frame rate are maintained. The ultrasonic diagnostic apparatus includes a transmission/reception unit for transmitting subject ultrasonic waves with a band substantially centered at a fundamental frequency and generating a received signal based on an ultrasonic echo from the subject, a harmonic unit for extracting a signal of a harmonic component of the fundamental frequency included in the received signal and extracting a signal of the fundamental component with the band substantially centered the fundamental frequency included in the received signal, and a display unit for generating a display image based on the extracted harmonic and fundamental components.
    Type: Grant
    Filed: December 8, 2005
    Date of Patent: July 6, 2010
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Tetsuya Kawagishi, Yoshitaka Mine, Koichiro Kurita, Masamichi Oyanagi
  • Patent number: 7722540
    Abstract: When a two-dimensional tomogram is to be displayed, motion information associated with a direction orthogonal to the tomogram is colored and mapped on the tomogram to be visualized by using the volume data of a TSI image. For example, a mapping image is generated by color-mapping shortening information at each point on a cardiac tissue on a short axis view by using the volume data of the TSI image. Superimposing and displaying the mapping image on the original short axis view makes it possible to simultaneously observe the shortening information even while a short axis view is obtained and observed.
    Type: Grant
    Filed: July 13, 2006
    Date of Patent: May 25, 2010
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Medical Systems Corporation
    Inventors: Yasuhiko Abe, Tetsuya Kawagishi
  • Publication number: 20100111380
    Abstract: A motion function of a biological tissue is efficiently evaluated on the basis of image data collected from different medical image diagnostic apparatuses. In terms of a common analysis algorithm applied to subject's time-series image data supplied from a separate medical image diagnostic apparatus, a setting part sets a plurality of interest points on a myocardial tissue of a reference image data extracted from the image data, and a tracking process part measures a motion parameter on the basis of displacement information of the myocardial tissue at the interest points obtained by a tracking process between the reference image data and subsequent image data thereof. Meanwhile, a data creating unit creates parameter image data showing two-dimension distribution of the motion parameter or parameter time-series data showing a variation in time of the motion parameter as parameter data on the basis of the measurement result, and displays the parameter data.
    Type: Application
    Filed: November 5, 2008
    Publication date: May 6, 2010
    Inventors: Tetsuya Kawagishi, Hiroyuki Ohuchi, Yasuhiko Abe, Thomas Helle-Valle, Joao A. C. Lima
  • Patent number: 7666139
    Abstract: An ultrasonic imaging apparatus, including an ultrasonic probe including an ultrasonic vibration element configured to transmit and receive an ultrasonic wave in a scanning direction in an object in which a contrast media has been injected; a transmission unit configured to apply successive drive pulses to the probe so as to transmit respective ultrasonic signals in respective rate sections; a reception unit configured to receive reflected ultrasonic signals, including first reflected ultrasonic signals produced by a first drive pulse in a first rate section and reflected back to the probe in the first rate section and in a second rate section subsequent to the first rate section; an operation unit configured to perform an operation including at least one of addition and subtraction of at least two of the first ultrasonic signals received during different rate sections; and a signal processor configured to produce image data based on the result of the operation performed by the operation unit.
    Type: Grant
    Filed: October 10, 2003
    Date of Patent: February 23, 2010
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Akihiro Kakee, Makoto Hirama, Tetsuya Kawagishi, Tomohisa Imamura
  • Publication number: 20100041992
    Abstract: When displaying a plurality of images in different conformations in relation to information of a tissue motion typified by a heart wall motion, support information which is used to rapidly and easily visually confirm a relative positional correspondence relationship between an MPR image, a polar mapping image, and a three-dimensional image is generated and displayed. A marker indicative of a desired local position is set and displayed as required. Further, a position corresponding to the set or changed marker may not be present on the MPR image. In such a case, the MPR image always including a position corresponding to the set or changed marker is generated and displayed by automatically adjusting a position of an MPR cross section.
    Type: Application
    Filed: August 12, 2009
    Publication date: February 18, 2010
    Inventors: Hiroyuki OHUCHI, Yasuhiko Abe, Tetsuya Kawagishi, Shinichi Hashimoto
  • Publication number: 20090318803
    Abstract: A plurality of strain gauges defined by gauge endpoints are set in each time phase using motion vector information of tissue, and a three-dimensional strain gauge image in which each strain gauge is disposed at a three-dimensional position corresponding to, for example, an ultrasonic image in each time phase is generated and displayed. Moreover, an MPR image is set on volume data and is displayed in a predetermined form in a state where gauge coordinates are projected thereon.
    Type: Application
    Filed: June 18, 2009
    Publication date: December 24, 2009
    Inventors: Yasuhiko ABE, Tetsuya Kawagishi
  • Publication number: 20090306508
    Abstract: An ultrasonic diagnostic apparatus disclosed herein comprises an ultrasonic probe which generates an ultrasonic beam, a volume data set collecting unit which collects a plurality of volume data sets corresponding to a plurality of three-dimensional scan ranges via the ultrasonic probe, the plurality of three-dimensional scan ranges partly overlapping one another, a region of interest setting unit which sets, in accordance with a user instruction, a region of interest on a first tomogram generated from particular one of the plurality of volume data sets, a tomogram generating unit which generates the first tomogram from the particular volume data set and also generates a second tomogram associated with a section including the region of interest from another volume data set corresponding to the three-dimensional scan range including the region of interest, and a display unit which displays the first tomogram and the second tomogram.
    Type: Application
    Filed: June 5, 2009
    Publication date: December 10, 2009
    Inventors: Tetsuya YOSHIDA, Tetsuya Kawagishi, Naohisa Kamiyama, Yoko Okamura, Yasuhiko Abe
  • Publication number: 20090270732
    Abstract: In time phases except a first time phase, a contour tracking part tracks the position of a region of interest based on image data acquired in each of the time phases. A re-tracking part receives correction of the position of the region of interest in a second time phase, and obtains the position of the corrected region of interest in and after the second time phase based on the image data acquired in and after the second time phase. From position information of the region of interest in and before the second time phase and position information of the corrected region of interest in and after the second time phase, a position calculator obtains position information of the region of interest in all the time phases. A computing part obtains motion information of a tissue within the region of interest based on the position information of the region of interest.
    Type: Application
    Filed: April 24, 2009
    Publication date: October 29, 2009
    Applicants: TOSHIBA MEDICAL SYSTEMS CORPORATION, Kansai Electric Power Company, Inc.
    Inventors: Yasuhiko ABE, Tetsuya KAWAGISHI, Katsuhisa ISHII