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: 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
  • Patent number: 10064585
    Abstract: According to an embodiment, a photon detecting element includes one or more avalanche photodiodes and a circuit. The circuit is connected between cathodes of the one or more avalanche photodiodes and an external power source. The circuit is configured in which a first temperature coefficient representing variation of a setting potential with respect to temperature variation when constant-current driving is performed so that electrical potential of the cathodes becomes equal to the setting potential is substantially the same as a second temperature coefficient representing variation of breakdown voltage of the one or more avalanche photodiodes with respect to temperature variation.
    Type: Grant
    Filed: September 9, 2015
    Date of Patent: September 4, 2018
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Shunsuke Kimura, Hiroshi Ota, Go Kawata, Hideyuki Funaki, Rei Hasegawa
  • Patent number: 10041830
    Abstract: A radiation detection apparatus according to an embodiment includes a radiation detector that detects radiation; a first measurer that measures energy of the radiation from the radiation detected by the radiation detector; and a second measurer that measures the number of times that the radiation detector detects the radiation.
    Type: Grant
    Filed: September 15, 2016
    Date of Patent: August 7, 2018
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Shunsuke Kimura, Go Kawata, Hideyuki Funaki, Masanori Furuta, Hirokatsu Shirahama, Tetsuro Itakura
  • Publication number: 20180206804
    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: Application
    Filed: August 23, 2017
    Publication date: July 26, 2018
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Go KAWATA, Keita Sasaki, Rei Hasegawa
  • Patent number: 10007005
    Abstract: A method of manufacturing a radiation detector according to an embodiment includes: forming a plurality of scintillator array columns, each of the scintillator array columns being formed by preparing a scintillator member that a thickness being smaller than a length and a width, the scintillator member having a first face, a second face, a third face, and a fourth face, and being cut from the third face along the second direction to form at least a groove that penetrates from the first face to the second face but does not reach the fourth face to have an uncut portion near the fourth face; stacking the scintillator array columns in the first direction with a space between each of adjacent two scintillator array columns, and filling a spacer material into the space; inserting a reflector into each space and each groove; and cutting the uncut portion.
    Type: Grant
    Filed: May 17, 2016
    Date of Patent: June 26, 2018
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yasuharu Hosono, Kazunori Miyazaki, Go Kawata, Mitsuyoshi Kobayashi, Rei Hasegawa
  • Patent number: 9952334
    Abstract: A pulse detection circuit according to an embodiment includes a conversion circuit, a delay circuit, first and second comparators, a latch, and a generation circuit. The conversion circuit converts an input signal into a thermometer code signal. The delay circuit outputs a delay signal being the thermometer code signal delayed by a predetermined delay time. The first comparator (The second comparator) compares the thermometer code signal with the delay signal and outputs an increase signal (a decrease signal) indicating whether the input signal is larger (smaller) than the input signal before the delay time. Based on the increase signal and the decrease signal, the latch outputs an increase-decrease signal indicating whether the input signal is increasing or decreasing. Based on the thermometer code signal and the increase-decrease signal, the generation circuit generates a pulse detection signal and a pileup detection signal.
    Type: Grant
    Filed: May 26, 2016
    Date of Patent: April 24, 2018
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Hirokatsu Shirahama, Tetsuro Itakura, Masanori Furuta, Shunsuke Kimura, Go Kawata, Hideyuki Funaki
  • Patent number: 9945962
    Abstract: According to an embodiment, a signal processor includes an integrator, a differentiator, a zero cross detector, a pile-up detector, an event interval detector, a counter, and a creator. The integrator is configured to calculate charge of current from a photoelectric converter for an incident radiation. The differentiator is configured to calculate a differential value of the current. The zero cross detector is configured to detect a zero cross of the differential value. The pile-up detector is configured to detect pile-up of the current based on the zero cross. The event interval detector is configured to detect, based on the zero cross and pile-up, an event interval of the radiation entering. The counter is configured to count, based on the charge and pile-up, the respective numbers of events according to the charge and the event interval. The creator is configured to create histograms for the numbers of events.
    Type: Grant
    Filed: September 8, 2016
    Date of Patent: April 17, 2018
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Hideyuki Funaki, Shunsuke Kimura, Go Kawata, Tetsuro Itakura, Masanori Furuta
  • Patent number: 9921320
    Abstract: According to an embodiment, an apparatus includes a first detector, a second detector, and a controller. The first detector is configured to detect first radiation at a first frequency within a first time by at least a first radiation detecting element and a second radiation detecting element that are positioned near to each other, and output a first signal. The second detector is configured to detect second radiation at a second frequency less than the first frequency within a second time by at least the first radiation detecting element and the second radiation detecting element, and output a second signal. The controller is configured to generate a third signal representing a difference between the first signal and the second signal, and calculate energy using the third signal.
    Type: Grant
    Filed: October 30, 2015
    Date of Patent: March 20, 2018
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Go Kawata, Shunsuke Kimura, Yasuharu Hosono, Rei Hasegawa, Toshiyuki Ono
  • Patent number: 9877689
    Abstract: According to an embodiment, a detection device includes a plurality of first detectors and a plurality of second detectors. The plurality of first detectors are arranged on a two-dimensional plane. Each first detector is configured to detect photons in a photon-counting manner. The plurality of second detectors are arranged on the two-dimensional plane. Each second detector is configured to detect photons in a charge-integrating manner.
    Type: Grant
    Filed: September 12, 2016
    Date of Patent: January 30, 2018
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Go Kawata, Shunsuke Kimura, Rei Hasegawa
  • Patent number: 9864079
    Abstract: According to an embodiment, a radiation detection device includes a scintillator layer, a plurality of detectors, a setting unit, an identifier, and a corrector. The scintillator layer is configured to convert radiation into scintillation light. The detectors are arranged along a first surface facing the scintillator layer to detect light. The setting unit is configured to set one of the detectors as a first detector to be corrected. The identifier is configured to identify, out of the detectors, a second detector that detects a synchronization signal synchronizing with a first signal detected by the first detector. The corrector is configured to correct an energy spectrum of light detected by the first detector on the basis of a second signal serving as the synchronization signal in signals detected by the second detector, the first signal, and characteristic X-ray energy of a scintillator raw material constituting the scintillator layer.
    Type: Grant
    Filed: December 9, 2015
    Date of Patent: January 9, 2018
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Keiko Fujii, Go Kawata, Yasuharu Hosono, Kazunori Miyazaki, Rei Hasegawa