Patents by Inventor Kenji Hirohata
Kenji Hirohata 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).
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Patent number: 10847620Abstract: A semiconductor device comprises a semiconductor chip and a mounting substrate. The semiconductor chip has an element structure including: a silicon carbide substrate that has a hexagonal crystal structure; a gate electrode that is disposed on a part above a first surface corresponding to a (0001) plane or a (000-1) plane of the silicon carbide substrate; an insulating film that is interposed between the silicon carbide substrate and the gate electrode; and a source and a drain that are disposed with respect to the silicon carbide substrate and the gate electrode such that at least a part of a channel through which a carrier moves extends in a <1-100> direction of crystal orientation of the silicon carbide substrate. The mounting substrate is fixed with the semiconductor chip such that compressive stress in a <11-20> direction of crystal orientation of the silicon carbide substrate is applied to the semiconductor chip at least in operation.Type: GrantFiled: August 30, 2018Date of Patent: November 24, 2020Assignee: Kabushiki Kaisha ToshibaInventors: Akihiro Goryu, Mitsuaki Kato, Kenji Hirohata
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Publication number: 20200349708Abstract: There is provided a medical image processing apparatus which includes a first extraction unit configured to extract coronary arteries depicted in images of a plurality of time phases relating to the heart, and to extract at least one stenosed part depicted in each coronary artery; a calculation unit configured to calculate a pressure gradient of each of the extracted coronary arteries, based on tissue blood flow volumes of the coronary arteries; a second extraction unit configured to extract an ischemic region depicted in the images; and a specifying unit configured to specify a responsible blood vessel of the ischemic region by referring to a dominance map, in which each of the extracted coronary arteries and a dominance territory are associated, for the extracted ischemic region, and to specify a responsible stenosis, based on the pressure gradient corresponding to a stenosed part in the specified responsible blood vessel.Type: ApplicationFiled: July 15, 2020Publication date: November 5, 2020Applicant: CANON MEDICAL SYSTEMS CORPORATIONInventors: Takuma IGARASHI, Satoshi Wakai, Kazumasa Arakita, Hideaki Ishii, Yasuko Fujisawa, Shigeo Kaminaga, Kenji Hirohata, Junichiro Odga
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Patent number: 10776960Abstract: According to one embodiment, a medical image diagnostic apparatus includes a storage memory, processing circuitry, and a display. The storage memory stores data of a plurality of FFR distribution maps constituting a time series regarding a coronary artery, and data of a plurality of morphological images corresponding to the time series. The processing circuitry converts the plurality of FFR distribution maps into a plurality of corresponding color maps, respectively. The display displays a plurality of superposed images obtained by superposing the plurality of color maps and the plurality of morphological images respectively corresponding in phase to the plurality of color maps. The display restricts display targets for the plurality of color maps based on the plurality of FFR distribution maps or the plurality of morphological images.Type: GrantFiled: March 26, 2019Date of Patent: September 15, 2020Assignee: CANON MEDICAL SYSTEMS CORPORATIONInventors: Hideaki Ishii, Satoshi Wakai, Kazumasa Arakita, Takuma Igarashi, Yasuko Fujisawa, Shigeo Kaminaga, Kenji Hirohata, Junichiro Ooga
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Patent number: 10748285Abstract: There is provided a medical image processing apparatus which includes a first extraction unit configured to extract coronary arteries depicted in images of a plurality of time phases relating to the heart, and to extract at least one stenosed part depicted in each coronary artery; a calculation unit configured to calculate a pressure gradient of each of the extracted coronary arteries, based on tissue blood flow volumes of the coronary arteries; a second extraction unit configured to extract an ischemic region depicted in the images; and a specifying unit configured to specify a responsible blood vessel of the ischemic region by referring to a dominance map, in which each of the extracted coronary arteries and a dominance territory are associated, for the extracted ischemic region, and to specify a responsible stenosis, based on the pressure gradient corresponding to a stenosed part in the specified responsible blood vessel.Type: GrantFiled: September 26, 2017Date of Patent: August 18, 2020Assignee: Canon Medical Systems CorporationInventors: Takuma Igarashi, Satoshi Wakai, Kazumasa Arakita, Hideaki Ishii, Yasuko Fujisawa, Shigeo Kaminaga, Kenji Hirohata, Junichiro Ooga
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Publication number: 20200214659Abstract: A medical-information processing apparatus according to an embodiment includes processing circuitry. The processing circuitry acquires medical image data that is obtained during imaging on the subject in a resting state in the time phase where the relationship between the volume of blood flow and the pressure in a blood vessel in the cardiac cycle of the subject indicates a proportional relationship.Type: ApplicationFiled: March 9, 2020Publication date: July 9, 2020Applicant: CANON MEDICAL SYSTEMS CORPORATIONInventors: Takuya Sakaguchi, Kenji Hirohata
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Patent number: 10617598Abstract: According to one embodiment, an apparatus for loading vibration is provided. The apparatus for loading vibration has a contacting unit, a first vibration unit, a storage unit and a control unit. The contacting unit is capable of coming into contact with a biological body which pulsates or beats in a contact state of a first contact condition. The first vibration unit provides a self-excited vibration to the biological body through the contacting unit. The storage unit stores a second contact condition which synchronizes the self-excited vibration with the pulses or the beats. The control unit controls the contact state of the contacting unit so as to make the first contact condition become closer to the second contact condition.Type: GrantFiled: September 14, 2012Date of Patent: April 14, 2020Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Kenji Hirohata, Junichiro Ooga, Takuya Hongo, Yousuke Hisakuni
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Patent number: 10610184Abstract: A medical-information processing apparatus according to an embodiment includes processing circuitry. The processing circuitry acquires medical image data that is obtained during imaging on the subject in a resting state in the time phase where the relationship between the volume of blood flow and the pressure in a blood vessel in the cardiac cycle of the subject indicates a proportional relationship.Type: GrantFiled: August 10, 2017Date of Patent: April 7, 2020Assignee: Canon Medical Systems CorporationInventors: Takuya Sakaguchi, Kenji Hirohata
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Publication number: 20200075733Abstract: According to an embodiment, in a semiconductor device, a total value of a change amount of chemical potential of the semiconductor device with respect to a expansion direction of a stacking fault and the stacking fault energy of the stacking fault is zero or more.Type: ApplicationFiled: February 27, 2019Publication date: March 5, 2020Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Akira Kano, Akihiro Goryu, Kenji Hirohata
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Patent number: 10478073Abstract: A centerline extraction unit extracts at least two coronary artery centerline structures from at least two images respectively corresponding to at least two cardiac phases concerning a heart, an interpolation processing unit interpolates coronary artery centerline structures concerning other cardiac phases from the at least two extracted coronary artery centerline structures to generate coronary artery centerline structures respectively corresponding to a plurality of cardiac phases throughout one heartbeat of the heart, and a displacement distribution calculation unit calculates a plurality of displacement distributions between the respective cardiac phases from a plurality of coronary artery centerline structures throughout the one heartbeat.Type: GrantFiled: May 29, 2015Date of Patent: November 19, 2019Assignee: Canon Medical Systems CorporationInventors: Hideaki Ishii, Satoshi Wakai, Kazumasa Arakita, Takuma Igarashi, Yasuko Fujisawa, Shigeo Kaminaga, Kenji Hirohata, Junichiro Ooga
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Publication number: 20190288072Abstract: A semiconductor storage device comprises a plurality of memory cells arranged in a matrix. Each of the memory cells includes: a semiconductor storage element including a silicon carbide substrate and a silicon carbide film on a first surface of the silicon carbide substrate; a lower electrode on a second surface facing away from the first surface of the silicon carbide substrate; and an upper electrode on at least part of a surface of the silicon carbide film, the surface facing away from another surface of the silicon carbide film in contact with the silicon carbide substrate. Each memory cell includes at least one basal plane dislocation formed at at least part of the semiconductor storage element.Type: ApplicationFiled: August 30, 2018Publication date: September 19, 2019Applicant: Kabushiki Kaisha ToshibaInventors: Akihiro Goryu, Akira Kano, Kenji Hirohata
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Publication number: 20190221008Abstract: According to one embodiment, a medical image diagnostic apparatus includes a storage memory, processing circuitry, and a display. The storage memory stores data of a plurality of FFR distribution maps constituting a time series regarding a coronary artery, and data of a plurality of morphological images corresponding to the time series. The processing circuitry converts the plurality of FFR distribution maps into a plurality of corresponding color maps, respectively. The display displays a plurality of superposed images obtained by superposing the plurality of color maps and the plurality of morphological images respectively corresponding in phase to the plurality of color maps. The display restricts display targets for the plurality of color maps based on the plurality of FFR distribution maps or the plurality of morphological images.Type: ApplicationFiled: March 26, 2019Publication date: July 18, 2019Applicant: CANON MEDICAL SYSTEMS CORPORATIONInventors: Hideaki ISHII, Satoshi WAKAI, Kazumasa ARAKITA, Takuma IGARASHI, Yasuko FUJISAWA, Shigeo KAMINAGA, Kenji HIROHATA, Junichiro OOGA
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Publication number: 20190221646Abstract: A semiconductor device comprises a semiconductor chip and a mounting substrate. The semiconductor chip has an element structure including: a silicon carbide substrate that has a hexagonal crystal structure; a gate electrode that is disposed on a part above a first surface corresponding to a (0001) plane or a (000-1) plane of the silicon carbide substrate; an insulating film that is interposed between the silicon carbide substrate and the gate electrode; and a source and a drain that are disposed with respect to the silicon carbide substrate and the gate electrode such that at least a part of a channel through which a carrier moves extends in a <1-100> direction of crystal orientation of the silicon carbide substrate. The mounting substrate is fixed with the semiconductor chip such that compressive stress in a <11-20> direction of crystal orientation of the silicon carbide substrate is applied to the semiconductor chip at least in operation.Type: ApplicationFiled: August 30, 2018Publication date: July 18, 2019Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Akihiro GORYU, Mitsuaki Kato, Kenji Hirohata
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Publication number: 20190219628Abstract: An inspection device comprises: a detecting unit that is connected to a plurality of semiconductor chips having mutually different rates of change of electrical resistance with respect to stress loading direction, and that detects an electrical resistance value of each semiconductor chip from electric current flowing in each semiconductor chip; a first memory unit that is used to hold model data meant for converting an electrical resistance value into a characteristic value indicating at least either temperature, or stress, or strain; a converting unit that converts the electrical resistance value of each semiconductor chip as detected by the detecting unit into the characteristic value using the model data held in the first memory unit; and a second memory unit that is used to store the characteristic value, which is obtained by conversion by the converting unit, as time-series data for each of the plurality of semiconductor chips.Type: ApplicationFiled: August 30, 2018Publication date: July 18, 2019Applicant: Kabushiki Kaisha ToshibaInventors: Mitsuaki KATO, Akihiro Goryu, Kenji Hirohata
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Patent number: 10349507Abstract: A medical apparatus includes a power device, a temperature sensor, a conversion processing unit and a prediction time period calculation unit. The temperature sensor detects temperature data. The conversion processing unit refers to temperature data obtained by the temperature sensor in a table in which at least one of temperature data for inside a case covering the power device and temperature data for a wire bonded to the power device is associated with data of actually measured temperatures, and obtains at least one of the temperature data for inside the case and the temperature data for the wire. The prediction time period calculation unit calculates a prediction time period until a failure of the power device based on the obtained temperature data.Type: GrantFiled: April 28, 2014Date of Patent: July 9, 2019Assignee: Toshiba Medical Systems CorporationInventors: Fumio Ishiyama, Kenji Hirohata
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Patent number: 10275908Abstract: According to one embodiment, a medical image diagnostic apparatus includes a storage memory, processing circuitry, and a display. The storage memory stores data of a plurality of FFR distribution maps constituting a time series regarding a coronary artery, and data of a plurality of morphological images corresponding to the time series. The processing circuitry converts the plurality of FFR distribution maps into a plurality of corresponding color maps, respectively. The display displays a plurality of superposed images obtained by superposing the plurality of color maps and the plurality of morphological images respectively corresponding in phase to the plurality of color maps. The display restricts display targets for the plurality of color maps based on the plurality of FFR distribution maps or the plurality of morphological images.Type: GrantFiled: November 10, 2017Date of Patent: April 30, 2019Assignee: Toshiba Medical Systems CorporationInventors: Hideaki Ishii, Satoshi Wakai, Kazumasa Arakita, Takuma Igarashi, Yasuko Fujisawa, Shigeo Kaminaga, Kenji Hirohata, Junichiro Ooga
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Blood vessel analysis apparatus, medical image diagnosis apparatus, and blood vessel analysis method
Patent number: 10249043Abstract: According to one embodiment, a structuring circuitry temporarily structures a dynamical model of analysis processing based on the time-series medical image. The identification circuitry identifies a latent variable of the dynamical model so that at least one of a prediction value of a blood vessel morphology and a prediction value of a bloodstream based on the temporarily structured dynamical model is in conformity with at least one of an observation value of the blood vessel morphology and an observation value of the bloodstream measured in advance. The analysis circuitry analyzes the dynamical model to which the identified latent variable is allocated.Type: GrantFiled: February 14, 2018Date of Patent: April 2, 2019Assignee: Toshiba Medical Systems CorporationInventors: Junichiro Ooga, Kenji Hirohata, Shigeo Kaminaga, Yasuko Fujisawa, Satoshi Wakai, Kazumasa Arakita, Takuma Igarashi, Hideaki Ishii -
Publication number: 20190064248Abstract: A semiconductor device inspection apparatus according to embodiments comprises: an action unit that generates an internal stress in a predetermined direction in a semiconductor device; a stress controller that controls a magnitude of the internal stress generated in the semiconductor device by the action unit; a probe electrically connected to the semiconductor device; a probe controller that supplies a current to the semiconductor device via the probe; and a controller that screens the semiconductor device based on a first current flowing through the semiconductor device via the probe while the internal stress is not generated in the semiconductor device and a second current flowing through the semiconductor device via the probe while the action unit generates the internal stress in the semiconductor device.Type: ApplicationFiled: March 5, 2018Publication date: February 28, 2019Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Akihiro GORYU, Mitsuaki Kato, Akira Kano, Kenji Hirohata
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Patent number: 10206587Abstract: An image processing apparatus according to an embodiment includes a processing circuitry. The processing circuitry is configured to obtain images in a time series including images of a blood vessel of a subject and correlation information indicating a correlational relationship between physical indices of the blood vessel and function indices of the blood vessel related to vascular hemodynamics, calculate blood vessel morphology indices in a time series indicating morphology of the blood vessel of the subject, on a basis of the images in the time series, and identify a function index of the blood vessel of the subject, by using a physical index of the blood vessel of the subject obtained from the blood vessel morphology indices, on a basis of the correlation information.Type: GrantFiled: November 4, 2016Date of Patent: February 19, 2019Assignee: Toshiba Medical Systems CorporationInventors: Akira Kano, Kenji Hirohata, Junichiro Ooga, Mitsuaki Kato, Takuya Hongo, Akihiro Goryu, Shigeo Kaminaga, Yasuko Fujisawa, Satoshi Wakai, Yoshihiro Ikeda, Kazumasa Arakita
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Patent number: 10111635Abstract: An image processing apparatus according to an embodiment includes storage circuitry and processing circuitry. The storage circuitry stores therein fluid resistance data representing a correlation among a vascular shape, a blood flow rate, and a pressure loss. The processing circuitry extracts, from three-dimensional image data in which a blood vessel of a subject is rendered, vascular shape data representing a shape of the blood vessel. The processing circuitry performs fluid analysis based on the vascular shape data and the blood flow rate and the pressure loss that correspond to the vascular shape data and that are correlated by the fluid resistance data to derive a functional index related to a blood circulation state in the blood vessel of the subject.Type: GrantFiled: October 4, 2016Date of Patent: October 30, 2018Assignee: Toshiba Medical Systems CorporationInventors: Mitsuaki Kato, Kenji Hirohata, Akira Kano, Shinya Higashi, Shigeo Kaminaga, Yasuko Fujisawa, Satoshi Wakai
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BLOOD VESSEL ANALYSIS APPARATUS, MEDICAL IMAGE DIAGNOSIS APPARATUS, AND BLOOD VESSEL ANALYSIS METHOD
Publication number: 20180174297Abstract: According to one embodiment, a structuring circuitry temporarily structures a dynamical model of analysis processing based on the time-series medical image. The identification circuitry identifies a latent variable of the dynamical model so that at least one of a prediction value of a blood vessel morphology and a prediction value of a bloodstream based on the temporarily structured dynamical model is in conformity with at least one of an observation value of the blood vessel morphology and an observation value of the bloodstream measured in advance. The analysis circuitry analyzes the dynamical model to which the identified latent variable is allocated.Type: ApplicationFiled: February 14, 2018Publication date: June 21, 2018Applicant: Toshiba Medical Systems CorporationInventors: Junichiro Ooga, Kenji Hirohata, Shigeo Kaminaga, Yasuko Fujisawa, Satoshi Wakai, Kazumasa Arakita, Takuma Igarashi, Hideaki Ishii