Patents by Inventor Go KAWATA

Go KAWATA 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: 20220196856
    Abstract: A radiation detector according to an embodiment includes a light emitting element, an optical sensor, and a filter. The light emitting element generates light in conjunction with radiation becoming incident thereto. The optical sensor detects the light. The filter is provided between the light emitting element and the optical sensor and passes only a certain wavelength of the light so that delay time until the light is detected becomes shorter.
    Type: Application
    Filed: December 17, 2021
    Publication date: June 23, 2022
    Applicant: CANON MEDICAL SYSTEMS CORPORATION
    Inventor: Go KAWATA
  • Publication number: 20220146695
    Abstract: A radiation detector according to an embodiment includes a scintillator array, a sensor array, electronic circuitry, a switch, and control circuitry. The scintillator array includes a plurality of scintillator pixels each configured to convert radiation into light. The sensor array includes a plurality of detection elements each configured to detect the light. The electronic circuitry is configured to output digital data on the basis of signals output from the detection elements. The switch is provided between the sensor array and the electronic circuitry. The control circuitry is configured to control the switch on the basis of a positional relation between the sensor array and the scintillator array.
    Type: Application
    Filed: November 9, 2021
    Publication date: May 12, 2022
    Applicant: CANON MEDICAL SYSTEMS CORPORATION
    Inventors: Go KAWATA, Tatsuo OSAKA
  • Publication number: 20220065803
    Abstract: A radiation diagnostic device according to an aspect of the present invention includes a first detector, a second detector, and processing circuitry. The first detector detects Cherenkov light that is generated when radiation passes. The second detector is disposed to be opposed to the first detector on a side distant from a generation source of the radiation, and detects energy information of the radiation. The processing circuitry specifies Compton scattering events detected by the second detector, and determines an event corresponding to an incident channel among the specified Compton scattering events based on a detection result obtained by the first detector.
    Type: Application
    Filed: August 26, 2021
    Publication date: March 3, 2022
    Applicant: CANON MEDICAL SYSTEMS CORPORATION
    Inventors: Go KAWATA, Ryo OKUDA
  • Patent number: 11229412
    Abstract: An X-ray imaging apparatus according to an embodiment of the present disclosure includes an X-ray tube, a photon counting X-ray detector, and a filter unit. A generating unit of the X-ray tube is configured to generate X-rays. The photon counting X-ray detector is configured to count photons contained in the X-rays. The filter unit is provided between the X-ray tube and the photon counting X-ray detector. The filter unit includes a first filter and a second filter. The first filter is configured to shape a spectrum of the X-rays. The second filter is configured to generate X-ray fluorescence on the basis of X-rays related to a spectrum resulting from the shaping by the first filter.
    Type: Grant
    Filed: October 19, 2020
    Date of Patent: January 25, 2022
    Assignee: CANON MEDICAL SYSTEMS CORPORATION
    Inventor: Go Kawata
  • Publication number: 20220003886
    Abstract: A radiation detector according to an embodiment includes: a cathode electrode, a plurality of anode electrodes, a crystal, an anti-scatter grid, and a conductive part. The cathode electrode is provided on the radiation incident side. The plurality of anode electrodes are arranged so as to oppose the cathode electrode. The crystal is provided between the cathode electrode and the plurality of anode electrodes and configured to convert incident radiation into electrons. The conductive part is provided between the plurality of anode electrodes and has a conductivity higher than that of the crystal. The anti-scatter grid is provided on the radiation incident side of the cathode electrode so as to oppose the conductive part via the crystal, while being arranged in a first direction.
    Type: Application
    Filed: June 23, 2021
    Publication date: January 6, 2022
    Applicant: CANON MEDICAL SYSTEMS CORPORATION
    Inventors: Go KAWATA, Hiroaki NAKAI
  • Patent number: 11207037
    Abstract: A radiation detector according to an embodiment includes a sensor, an electronic circuitry, a switch, and a control circuitry. The sensor configured to be formed of plural electrodes and detect radiation. Based on signals output from the electrodes, the electronic circuitry configured to output digital data. The switch configured to be provided between each of the electrodes and the electronic circuitry. The control circuitry configured to control the switch, based on a positional relation between the plural electrodes and an anti-scatter grid.
    Type: Grant
    Filed: May 20, 2020
    Date of Patent: December 28, 2021
    Assignee: CANON MEDICAL SYSTEMS CORPORATION
    Inventors: Go Kawata, Hiroaki Nakai
  • Patent number: 11125895
    Abstract: According to an embodiment, a detection element includes a first electrode, a second electrode, an organic conversion layer, and a third electrode. The organic conversion layer is provided between the first electrode and the second electrode, and is configured to convert energy of a radiant ray into a charge. The third electrode is provided inside the organic conversion layer. Bias is applied to the third electrode.
    Type: Grant
    Filed: September 6, 2018
    Date of Patent: September 21, 2021
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Kohei Nakayama, Fumihiko Aiga, Go Kawata, Isao Takasu, Yuko Nomura, Satomi Taguchi, Hyangmi Jung, Atsushi Wada, Rei Hasegawa
  • Publication number: 20210236073
    Abstract: A radiation diagnosis device according to an embodiment includes a first detector and a second detector. The first detector detects Cherenkov light generated when a radiation passes. The second detector is provided to face the first detector on a side farther from a source of generating the radiation and detects the energy information of the radiation.
    Type: Application
    Filed: January 29, 2021
    Publication date: August 5, 2021
    Applicant: CANON MEDICAL SYSTEMS CORPORATION
    Inventors: Go KAWATA, Hiroaki NAKAI
  • Publication number: 20210121142
    Abstract: An X-ray imaging apparatus according to an embodiment of the present disclosure includes an X-ray tube, a photon counting X-ray detector, and a filter unit. A generating unit of the X-ray tube is configured to generate X-rays. The photon counting X-ray detector is configured to count photons contained in the X-rays. The filter unit is provided between the X-ray tube and the photon counting X-ray detector. The filter unit includes a first filter and a second filter. The first filter is configured to shape a spectrum of the X-rays. The second filter is configured to generate X-ray fluorescence on the basis of X-rays related to a spectrum resulting from the shaping by the first filter.
    Type: Application
    Filed: October 19, 2020
    Publication date: April 29, 2021
    Applicant: CANON MEDICAL SYSTEMS CORPORATION
    Inventor: Go KAWATA
  • Publication number: 20200367836
    Abstract: A radiation detector according to an embodiment includes a sensor, an electronic circuitry, a switch, and a control circuitry. The sensor configured to be formed of plural electrodes and detect radiation. Based on signals output from the electrodes, the electronic circuitry configured to output digital data. The switch configured to be provided between each of the electrodes and the electronic circuitry. The control circuitry configured to control the switch, based on a positional relation between the plural electrodes and an anti-scatter grid.
    Type: Application
    Filed: May 20, 2020
    Publication date: November 26, 2020
    Applicant: CANON MEDICAL SYSTEMS CORPORATION
    Inventors: Go KAWATA, Hiroaki NAKAI
  • Patent number: 10761222
    Abstract: According to an embodiment, a detection element includes a first electrode, a second electrode, an organic conversion layer, and a third electrode. A bias is applied to the first electrode. The organic conversion layer is arranged between the first electrode and the second electrode, and is configured to convert energy of a radiation into an electric charge. The third electrode is arranged in the organic conversion layer.
    Type: Grant
    Filed: September 5, 2018
    Date of Patent: September 1, 2020
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Kohei Nakayama, Fumihiko Aiga, Go Kawata, Isao Takasu, Yuko Nomura, Satomi Taguchi, Hyangmi Jung, Atsushi Wada, Rei Hasegawa
  • Patent number: 10595798
    Abstract: A detection apparatus according to an embodiment includes first detectors, a first electrode, second detectors and a second electrode. The first detectors detect a photon. The first electrode is electrically connected to each of the first detectors. The second detectors detect a photon. The second electrode is electrically connected to each of the second detectors. The number of first detectors is less than the number of second detectors.
    Type: Grant
    Filed: August 23, 2017
    Date of Patent: March 24, 2020
    Assignee: Canon Medical Systems Corporation
    Inventors: Go Kawata, Keita Sasaki, Rei Hasegawa
  • Publication number: 20190285759
    Abstract: According to an embodiment, a detection element includes a first electrode, a second electrode, an organic conversion layer, and a third electrode. The organic conversion layer is provided between the first electrode and the second electrode, and is configured to convert energy of a radiant ray into a charge. The third electrode is provided inside the organic conversion layer. Bias is applied to the third electrode.
    Type: Application
    Filed: September 6, 2018
    Publication date: September 19, 2019
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Kohei NAKAYAMA, Fumihiko AIGA, Go KAWATA, lsao TAKASU, Yuko NOMURA, Satomi TAGUCHI, Hyangmi JUNG, Atsushi WADA, Rei HASEGAWA
  • Publication number: 20190265370
    Abstract: According to an embodiment, a detection element includes a first electrode, a second electrode, an organic conversion layer, and a third electrode. A bias is applied to the first electrode. The organic conversion layer is arranged between the first electrode and the second electrode, and is configured to convert energy of a radiation into an electric charge. The third electrode is arranged in the organic conversion layer.
    Type: Application
    Filed: September 5, 2018
    Publication date: August 29, 2019
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Kohei Nakayama, Fumihiko Aiga, Go Kawata, Isao Takasu, Yuko Nomura, Satomi Taguchi, Hyangmi Jung, Atsushi Wada, Rei Hasegawa
  • Patent number: 10357214
    Abstract: According to an embodiment, a photon counting CT apparatus includes a scintillator, a photodiode array, a holder, a divider, and an image generator. The scintillator is configured to convert X-rays into light. The array includes first and second pixels. The first pixel includes a photodiode in a first range receiving the light emitted from the scintillator. The photodiode outputs an electrical signal based on the light. The second pixel includes a photodiode in a second range different from the first range. The holder is circuitry configured to hold a value of an electrical signal output by the second pixel. The divider circuitry is configured to count the number of photons of light incident on the first pixel by dividing an integrated value of electrical signals output by the first pixel by the held value. The image generator is circuitry configured to reconstruct an image based on the counted number.
    Type: Grant
    Filed: October 26, 2015
    Date of Patent: July 23, 2019
    Assignee: Toshiba Medical Systems Corporation
    Inventors: Shunsuke Kimura, Hideyuki Funaki, Go Kawata
  • Publication number: 20190189674
    Abstract: According to an embodiment, a photodetector includes a photo detection layer, light conversion members, and a first member. The photo detection layer includes, on a light incident surface, plural pixel regions and a surrounding region. The pixel region holds a photo detection element to detect the light. The surrounding region is a region other than the pixel regions on the light incident surface. The light conversion members are arranged to oppose the pixel regions in the photo detection layer and convert radiation to the light. Each light conversion member includes a bottom surface opposing the pixel region in the photo detection layer, a top surface opposing the bottom surface, and a lateral surface connecting the bottom and top surfaces. The first member is disposed on a portion of the surrounding region on the light incident surface and covers a portion of the lateral surface of the light conversion member.
    Type: Application
    Filed: February 6, 2019
    Publication date: June 20, 2019
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Yasuharu HOSONO, Kazuhiro SUZUKI, Hitoshi YAGI, Kazunori MIYAZAKI, Go KAWATA, Keita SASAKI, Rei HASEGAWA
  • Patent number: 10281592
    Abstract: According to an embodiment, a radiation measuring apparatus includes a detector, comparators, a threshold controller, counters, and a generator. The detector includes plural detecting elements each configured to convert energy of incident radiation into a first electrical signal. The comparators correspond to the respective detecting elements, each comparator being configured to output a second electrical signal when a level of the corresponding first electrical signal is not less than a threshold. The threshold controller is configured to supply a first value as the threshold to the respective comparators at a first time, and supply a second value as the threshold to the respective comparators at a second time. The counters correspond to the respective comparators, each counter being configured to count the corresponding second electrical signal. The generator is configured to generate a pulse height frequency distribution of the radiation by using counts of the counters.
    Type: Grant
    Filed: September 6, 2016
    Date of Patent: May 7, 2019
    Assignee: Canon Medical Systems Corporation
    Inventors: Go Kawata, Shunsuke Kimura, Hideyuki Funaki, Masanori Furuta, Tetsuro Itakura
  • Publication number: 20190079200
    Abstract: According to an embodiment, a radiation detection device includes one or more processors. The one or more processors are configured to: acquire an output waveform, from a detector configured to output the output waveform according to radiation; and identify a type of radiation incident on the detector, based on a first integrated value of the output waveform in a first integration period and a second integrated value of the output waveform in a second integration period.
    Type: Application
    Filed: February 27, 2018
    Publication date: March 14, 2019
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Go KAWATA, Rei Hasegawa
  • Patent number: 10171067
    Abstract: A waveform shaping filter according to an embodiment includes at least one filter stage and a control circuit. The filter stage includes a differentiation signal generation circuit, a proportional signal generation circuit, and an adder circuit. The differentiation signal generation circuit generates a differentiation signal obtained by amplifying a differentiation component of an input signal. The proportional signal generation circuit generates a proportional signal obtained by amplifying the input signal. The adder circuit outputs an output signal obtained by adding the proportional signal and the differentiation signal. The control circuit compares the output signal and a first detection level, detects at least one of an overshoot and an undershoot of the output signal, and controls a time constant of the filter stage, based on a detection result.
    Type: Grant
    Filed: February 25, 2016
    Date of Patent: January 1, 2019
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Tetsuro Itakura, Masanori Furuta, Shunsuke Kimura, Hideyuki Funaki, Go Kawata, Hirokatsu Shirahama
  • Patent number: 10154821
    Abstract: According to an embodiment, an apparatus includes a reference calculator, a peak calculator, a coefficient calculator, and a calibrator. The reference calculator is configured to calculate, as a first value, a most frequent electrical signal level from a first set of electrical signal levels output from the respective pixels of a detector for radiation. The peak calculator is configured to calculate, as a second value, a peak level of radiation energy of a characteristic X-ray, based on a relation between energy and intensity of radiation obtained from the first set. The coefficient calculator is configured to calculate a coefficient by dividing a difference between the first and second values by the peak level. The calibrator is configured to multiply an electrical signal level of each pixel by the coefficient and add the first value to the multiplication to calibrate a relation between detection output and incident radiation of the detector.
    Type: Grant
    Filed: September 8, 2016
    Date of Patent: December 18, 2018
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Go Kawata, Yasuharu Hosono, Rei Hasegawa