Patents by Inventor Tomohisa Imamura

Tomohisa Imamura 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: 20240398386
    Abstract: An ultrasound diagnosis apparatus of an embodiment includes storage circuitry and processing circuitry. The storage circuitry stores therein a trained model trained using a first ultrasound signal containing a saturated signal as input data and a second ultrasound signal in which effect of saturation is reduced from the first ultrasound signal, as target data. The processing circuitry inputs a third ultrasound signal containing a saturated signal to the trained model and acquires a fourth ultrasound signal that is output from the trained model and in which effect of saturation is reduced from the third ultrasound signal, to generate the fourth ultrasound signal.
    Type: Application
    Filed: June 5, 2023
    Publication date: December 5, 2024
    Applicant: CANON MEDICAL SYSTEMS CORPORATION
    Inventors: Ryosuke IWASAKI, Hiroki TAKAHASHI, Tomohisa IMAMURA, Ting XIA, Liang CAI, Jian ZHOU
  • Publication number: 20240378496
    Abstract: A method for harmonic imaging is provided and includes inputting first training ultrasound data, including a fundamental component and a harmonic component, to each of a plurality of teacher models, and training each teacher model with the first training ultrasound as teacher input data and second training ultrasound data, including the harmonic component, as teacher target data; acquiring, for each teacher, corresponding first estimated data output from the teacher model, in response to input of first ultrasound data to the teacher model; selecting a first particular teacher model by evaluating the corresponding first estimated data output from each of the trained teacher models; and training a student model with the first ultrasound data as student input data and the corresponding first estimated data of the selected first particular teacher model as student target data.
    Type: Application
    Filed: July 28, 2023
    Publication date: November 14, 2024
    Applicant: CANON MEDICAL SYSTEMS CORPORATION
    Inventors: Ting XIA, Jian ZHOU, Liang CAI, Zhou YU, Tomohisa IMAMURA, Ryosuke IWASAKI, Hiroki TAKAHASHI
  • Publication number: 20240338800
    Abstract: An apparatus, method, and computer-readable medium having processing circuitry to receive first ultrasound data including at least one harmonic component, and apply the first ultrasound data to inputs of a trained deep neural network model that outputs enhanced ultrasound image data, the deep neural network model having been trained with training data including input ultrasound data and corresponding target ultrasound data having predetermined target features, and output the enhanced ultrasound image data.
    Type: Application
    Filed: April 6, 2023
    Publication date: October 10, 2024
    Applicant: CANON MEDICAL SYSTEMS CORPORATION
    Inventors: Ting XIA, Jian ZHOU, Liang CAI, Zhou YU, Tomohisa IMAMURA, Ryosuke IWASAKI, Hiroki TAKAHASHI
  • Publication number: 20240260942
    Abstract: An ultrasound diagnosis apparatus according to an embodiment includes processing circuitry. This processing circuitry collects a first ultrasound signal including one or more harmonic components. By executing weighed addition processing where a coefficient distribution is applied to the first ultrasound signal for different directions of two or more dimensions, the processing circuitry generates a second ultrasound signal including components of each order at a ratio different, at a specific frequency, from a ratio among the frequency components included in the first ultrasound signal.
    Type: Application
    Filed: February 7, 2023
    Publication date: August 8, 2024
    Applicant: CANON MEDICAL SYSTEMS CORPORATION
    Inventors: Ryosuke IWASAKI, Hiroki TAKAHASHI, Tomohisa IMAMURA, Ting XIA, Liang CAI, Jian ZHOU, Zhou YU
  • Publication number: 20240061109
    Abstract: An ultrasound diagnosis apparatus according to an embodiment includes processing circuitry. The processing circuitry is configured to detect a saturation region of a signal based on an ultrasound wave received by an ultrasound probe; and to correct a first signal including an odd-numbered order harmonic component of the saturation region, on a basis of a second signal including an even-numbered order harmonic component of the saturation region.
    Type: Application
    Filed: August 17, 2023
    Publication date: February 22, 2024
    Applicant: CANON MEDICAL SYSTEMS CORPORATION
    Inventors: Ryosuke IWASAKI, Hiroki TAKAHASHI, Tomohisa IMAMURA
  • Patent number: 11896435
    Abstract: According to one embodiment, an ultrasound diagnostic apparatus includes processing circuitry. The processing circuitry forms a first transmission beam in a plurality of directions belonging to a first group, forms at least one first reception beam, forms a second transmission beam in a plurality of directions belonging to a second group, after an elapse of a time from performing a scan for the first group, forms at least one second reception beam, applies a wall filter to reception signals obtained by the first and the second reception beams, calculates bloodstream information based on the filtered reception signals, and generates image data based on the calculated bloodstream information.
    Type: Grant
    Filed: October 2, 2020
    Date of Patent: February 13, 2024
    Assignee: Canon Medical Systems Corporation
    Inventors: Hiroki Takahashi, Tomohisa Imamura
  • Publication number: 20240023940
    Abstract: An ultrasound diagnostic apparatus according to an embodiment includes image processing circuitry. The image processing circuitry acquires, based on a result of ultrasound scanning performed on a subject, blood flow information including a value that indicates a blood flow at each position within the subject and tissue property information including a value that indicates tissue properties at each position within the subject. The image processing circuitry generates a first image in which a difference in value in the blood flow information is represented by at least a difference in hue and a second image in which a difference in value in the tissue property information is represented by a difference other than the difference in hue. The image processing circuitry generates a combined image by combining the first image and the second image.
    Type: Application
    Filed: September 25, 2023
    Publication date: January 25, 2024
    Applicant: CANON MEDICAL SYSTEMS CORPORATION
    Inventors: Ryota OSUMI, Tomohisa IMAMURA, Kuramitsu NISHIHARA, Hiroki YOSHIARA, Hiroaki ISHIKAWA, Yuko TAKADA
  • Publication number: 20240000416
    Abstract: An ultrasound diagnosis apparatus includes: a transmission and reception circuitry configured to perform, via an ultrasound probe, a first ultrasound scan on a first region in a subject who has a contrast agent injected and a second ultrasound scan on at least a part of a second region in the subject overlapping with the first region, the second ultrasound scan including transmitting and receiving two types of ultrasound waves of which one or both of amplitude levels and phases are different from each other; and processing circuitry configured to generate a blood flow image corresponding to one frame by implementing a Doppler method on the basis of a data sequence including reception data obtained from the first ultrasound scan performed multiple times in mutually the same position within the first region to have the second ultrasound scan performed in-between and to generate a contrast-enhanced image based on a result of the second ultrasound scan performed at least one time.
    Type: Application
    Filed: September 13, 2023
    Publication date: January 4, 2024
    Applicant: CANON MEDICAL SYSTEMS CORPORATION
    Inventors: Hiroki YOSHIARA, Tomohisa IMAMURA, Koichiro KURITA
  • Patent number: 11801031
    Abstract: An ultrasound diagnosis apparatus includes: a transmission and reception circuitry configured to perform, via an ultrasound probe, a first ultrasound scan on a first region in a subject who has a contrast agent injected and a second ultrasound scan on at least a part of a second region in the subject overlapping with the first region, the second ultrasound scan including transmitting and receiving two types of ultrasound waves of which one or both of amplitude levels and phases are different from each other; and processing circuitry configured to generate a blood flow image corresponding to one frame by implementing a Doppler method on the basis of a data sequence including reception data obtained from the first ultrasound scan performed multiple times in mutually the same position within the first region to have the second ultrasound scan performed in-between and to generate a contrast-enhanced image based on a result of the second ultrasound scan performed at least one time.
    Type: Grant
    Filed: May 22, 2019
    Date of Patent: October 31, 2023
    Assignee: CANON MEDICAL SYSTEMS CORPORATION
    Inventors: Hiroki Yoshiara, Tomohisa Imamura, Koichiro Kurita
  • Publication number: 20230329677
    Abstract: An ultrasound diagnostic apparatus according to an embodiment includes processing circuitry. The processing circuitry calculates, based on first ultrasound information relating to a displacement over time of an organ that makes a periodic movement, a function relating to a clutter component originating from the organ, and calculates, based on the function and second ultrasound information relating to a displacement over time of the organ after pressure is applied to the organ, a shear wave that propagates through the organ by the applied pressure.
    Type: Application
    Filed: April 11, 2023
    Publication date: October 19, 2023
    Applicant: CANON MEDICAL SYSTEMS CORPORATION
    Inventors: Yasunori HONJO, Tomohisa IMAMURA
  • Patent number: 11786220
    Abstract: An ultrasound diagnostic apparatus according to an embodiment includes image processing circuitry. The image processing circuitry acquires, based on a result of ultrasound scanning performed on a subject, blood flow information including a value that indicates a blood flow at each position within the subject and tissue property information including a value that indicates tissue properties at each position within the subject. The image processing circuitry generates a first image in which a difference in value in the blood flow information is represented by at least a difference in hue and a second image in which a difference in value in the tissue property information is represented by a difference other than the difference in hue. The image processing circuitry generates a combined image by combining the first image and the second image.
    Type: Grant
    Filed: August 23, 2016
    Date of Patent: October 17, 2023
    Assignee: CANON MEDICAL SYSTEMS CORPORATION
    Inventors: Ryota Osumi, Tomohisa Imamura, Kuramitsu Nishihara, Hiroki Yoshiara, Hiroaki Ishikawa, Yuko Takada
  • Patent number: 11690597
    Abstract: The ultrasonic diagnostic apparatus according to the present embodiment includes a frequency characteristic analysis circuit, a filter setting circuit, and a filter processing circuit. The frequency characteristic analysis circuit performs a frequency analysis on a first reception signal corresponding to a region of interest of each depth, and acquires a frequency characteristic of each depth. The filter setting circuit sets a reception filter of each depth based on the acquired frequency characteristic of each depth such that the acquired frequency characteristic of each depth shows a predetermined frequency characteristic. The filter processing circuit applies the set reception filter of each depth to a second reception signal corresponding to the region of interest of each depth, the second reception signal being after the first reception signal, and converts the second reception signal into a third reception signal corresponding to the region of interest of each depth.
    Type: Grant
    Filed: February 26, 2020
    Date of Patent: July 4, 2023
    Assignee: CANON MEDICAL SYSTEMS CORPORATION
    Inventors: Hiroki Yoshiara, Tomohisa Imamura, Akihiro Kakee
  • Patent number: 11690598
    Abstract: According to one embodiment, an ultrasound diagnostic apparatus includes a transmitter/receiver and processing circuitry. The transmitter/receiver sequentially transmits a first transmission beam group and a second transmission beam group and receives at least one reception beam for each transmission beam, via an ultrasound probe having a plurality of transducers arranged along an azimuth direction and an elevation direction. The processing circuitry combines a first reception beam based on a first transmission beam included in the first transmission beam group and a second reception beam based on a second transmission beam included in the second transmission beam group. Transmission beams that are adjacent to each other in the azimuth direction or the elevation direction belong to transmission beam groups that are different from each other.
    Type: Grant
    Filed: July 18, 2019
    Date of Patent: July 4, 2023
    Assignee: Canon Medical Systems Corporation
    Inventor: Tomohisa Imamura
  • Patent number: 11564659
    Abstract: An ultrasonic diagnostic apparatus according to an embodiment includes transmission circuitry, receiving circuitry and extracting circuitry. The transmission circuitry cause an ultrasonic probe to perform three or more times of ultrasonic wave transmissions, an ultrasonic wave to be transmitted including a center frequency component, a phase of the center frequency component being different in each transmission. The receiving circuitry generates three or more reception signals corresponding to a common reception scanning line based on a plurality of reflected wave signals, the plurality of reflected wave signals being obtained through the three or more times of ultrasonic wave transmissions. The extracting circuitry extracts a nonlinear component included in the three or more reception signals by adding up the three or more reception signals after performing a processing including phase rotation processing on two or more reception signals among the three or more reception signals.
    Type: Grant
    Filed: December 11, 2015
    Date of Patent: January 31, 2023
    Assignee: CANON MEDICAL SYSTEMS CORPORATION
    Inventors: Hiroki Yoshiara, Tetsuya Kawagishi, Tomohisa Imamura, Yasunori Honjo, Akihiro Kakee, Yuko Takada
  • Publication number: 20220367039
    Abstract: A method and system enable to-be-processed medical image data and its corresponding noise characteristic information to be normalized to resemble noise characteristic information of training data used to train at least one neural network for at least one ultrasound data acquisition mode. After normalizing, this processed medical image data is input into the trained neural network for producing output data used for generating cleaner images. Noise characteristic information can be used directly in training a neural network, generating a trained neural network that can handle medical image data with various noise characteristics.
    Type: Application
    Filed: April 27, 2022
    Publication date: November 17, 2022
    Applicant: CANON MEDICAL SYSTEMS CORPORATION
    Inventors: Liang CAI, Jian ZHOU, Ting XIA, Zhou YU, Tomohisa IMAMURA, Ryosuke IWASAKI, Hiroki TAKAHASHI
  • Publication number: 20220313221
    Abstract: An ultrasound diagnosis apparatus according to an embodiment includes processing circuitry. The processing circuitry is configured to receive an input of first ultrasound data and to output second ultrasound data. The processing circuitry is configured to reconstruct third ultrasound data on the basis of amplitude information in the second ultrasound data and phase information in the first ultrasound data. The processing circuitry is configured to perform a process that uses amplitude information and phase information in the third ultrasound data.
    Type: Application
    Filed: April 1, 2022
    Publication date: October 6, 2022
    Applicant: CANON MEDICAL SYSTEMS CORPORATION
    Inventors: Ryosuke IWASAKI, Hiroki TAKAHASHI, Tomohisa IMAMURA
  • Publication number: 20210369247
    Abstract: A medical image diagnosis apparatus according to an embodiment includes processing circuitry configured to acquire signals from a subject over time, calculate a first similarity representing a similarity of the signals between frames with respect to each of a plurality of frames and a plurality of positions and calculate a second similarity representing a similarity of change of the first similarity over time between the positions, and output the second similarity.
    Type: Application
    Filed: May 28, 2021
    Publication date: December 2, 2021
    Applicant: CANON MEDICAL SYSTEMS CORPORATION
    Inventors: Yu IGARASHI, Masaki WATANABE, Yasunori HONJO, Tomohisa IMAMURA, Tetsuya KAWAGISHI
  • Patent number: 11076831
    Abstract: An ultrasound diagnosis apparatus according to an embodiment includes processing circuitry. The processing circuitry obtains time-series data having complex values based on a reflected wave of an ultrasound wave transmitted by an ultrasound probe and calculates an expansion coefficient in a case in which the obtained time-series data is expressed as a linear sum of a plurality of mathematical functions, the time-series data having, as an argument, a first parameter related to time. The plurality of mathematical functions are mathematical functions that are possible to be generated on a basis of a function family that has, as arguments, the first parameter and a second parameter different from the first parameter.
    Type: Grant
    Filed: February 27, 2017
    Date of Patent: August 3, 2021
    Assignee: CANON MEDICAL SYSTEMS CORPORATION
    Inventors: Satoshi Kawata, Toshiyuki Ono, Toshimitsu Kaneko, Tomoyuki Takeguchi, Ryota Osumi, Tomohisa Imamura
  • Publication number: 20210161511
    Abstract: The ultrasonic diagnostic apparatus according to the present embodiment includes an evaluating circuit, a frequency setting circuit, and a drive circuit. The evaluating circuit is configured to analyze a received signal of a predetermined depth based on received signals of ultrasonic wave to evaluate a degree of beam penetration to a deep portion. The frequency setting circuit is configured to set a transmission frequency based on a result evaluated by the evaluating circuit. The drive circuit is configured to generate a drive pulse based on the set transmission frequency.
    Type: Application
    Filed: November 27, 2020
    Publication date: June 3, 2021
    Applicant: CANON MEDICAL SYSTEMS CORPORATION
    Inventors: Hiroki YOSHIARA, Tomohisa IMAMURA, Akihiro KAKEE, Koichiro KURITA
  • Publication number: 20210137501
    Abstract: According to one embodiment, an ultrasound diagnostic apparatus includes processing circuitry. The processing circuitry forms a first transmission beam in a plurality of directions belonging to a first group, forms at least one first reception beam, forms a second transmission beam in a plurality of directions belonging to a second group, after an elapse of a time from performing a scan for the first group, forms at least one second reception beam, applies a wall filter to reception signals obtained by the first and the second reception beams, calculates bloodstream information based on the filtered reception signals, and generates image data based on the calculated bloodstream information.
    Type: Application
    Filed: October 2, 2020
    Publication date: May 13, 2021
    Applicant: Canon Medical Systems Corporation
    Inventors: Hiroki TAKAHASHI, Tomohisa IMAMURA