Patents by Inventor Koichi Miyazaki

Koichi Miyazaki 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: 20220209651
    Abstract: This DC pulse power supply device comprises a voltage clamper including a capacitor that is connected in parallel to a DC reactor in a chopper circuit provided in a pulsing unit in order to suppress increases in the surge voltage resulting from the leakage inductance of the DC reactor. During the start-up of pulsing operation, which is the initial stage of the pulse mode, the frequency of the pulsing operation of the chopper circuit is controlled over the period until the capacitor voltage is charged to a sufficient voltage to reset the magnetic saturation of the DC reactor.
    Type: Application
    Filed: November 8, 2019
    Publication date: June 30, 2022
    Applicant: KYOSAN ELECTRIC MFG. CO., LTD.
    Inventors: Itsuo Yuzurihara, Toshiyuki Adachi, Tomohiro Yoneyama, Koichi Miyazaki
  • Publication number: 20220193453
    Abstract: A radiotherapy system includes X-ray imaging apparatuses that obtain an X- ray image of the patient on a reference plane, and a position determination apparatus. The position determination apparatus calculates parameters of a region estimation model, using, as input data, a reference fluoroscopic image obtained before radiotherapy, and also using, as teacher data, a reference ROI image obtained with respect to the reference fluoroscopic image before radiotherapy. During radiotherapy, the position determination apparatus estimates a region of interest with respect to the X-ray image and a DRR image, based on the parameters and the X-ray image, determines a degree of matching between the X-ray image and the DRR image for the region of interest while virtually changing a relative position/orientation relationship between a CT image and the reference plane, and determines an amount of deviation in position/orientation between the patient and the CT image.
    Type: Application
    Filed: October 17, 2019
    Publication date: June 23, 2022
    Inventors: Koichi MIYAZAKI, Toru UMEKAWA
  • Publication number: 20220200582
    Abstract: In a DC pulse power supply device according to the present invention, at the time of starting pulsing operation, the duty of the pulsing operation of a chopper circuit is controlled, a switching element is set to an ON state, and the pulse width at which the DC reactor is in an energized state is made variable over the period until the capacitor voltage is charged to a sufficient voltage to reset the magnetic saturation of the DC reactor. Gradually increasing the pulse width suppresses the degree of increase in the DC reactor current, and suppresses the DC reactor current below the magnetic saturazion level. As a result, the magnetic saturation of the DC reactor is suppressed at the time of starting pulsing operation.
    Type: Application
    Filed: November 8, 2019
    Publication date: June 23, 2022
    Applicant: KYOSAN ELECTRIC MFG. CO., LTD.
    Inventors: Itsuo Yuzurihara, Toshiyuki Adachi, Tomohiro Yoneyama, Koichi Miyazaki
  • Publication number: 20220149719
    Abstract: In the present invention, when a DC reactor is in a magnetically saturated state, the on/off operations of a switching element are suspended and the switching element is set to an off state for a predetermined period of time, thereby resetting the magnetic saturation of the DC reactor and maintaining the supply of power to a load. After resetting the magnetic saturation, the pulse output of the normal pulse mode is restarted.
    Type: Application
    Filed: November 8, 2019
    Publication date: May 12, 2022
    Applicant: KYOSAN ELECTRIC MFG. CO., LTD.
    Inventors: Itsuo Yuzurihara, Toshiyuki Adachi, Tomohiro Yoneyama, Koichi Miyazaki
  • Publication number: 20220094266
    Abstract: This DC-pulse power supply device is provided with: a DC power supply; a pulse unit (20) for generating a pulse output using a step-up chopper circuit connected to the DC power supply; and a voltage superimposing unit (30A, 30B) connected to a DC reactor of the step-up chopper circuit. The voltage superimposing unit (30A, 30B) superimposes an amount (Vc, VDCL2) corresponding to a superimposed voltage on the output voltage of the step-up chopper circuit. The pulse unit (20) outputs, in a pulse form, the output voltage (Vo) on which the amount (Vc, VDCL2) corresponding to the superimposed voltage is superimposed by the voltage superimposing unit (30A, 30B). The amount corresponding to the superimposed voltage is superimposed on the pulse output of the step-up chopper circuit, thereby raising the output voltage of the pulse output of the step-up chopper circuit.
    Type: Application
    Filed: November 8, 2019
    Publication date: March 24, 2022
    Applicant: KYOSAN ELECTRIC MFG. CO., LTD.
    Inventors: Itsuo Yuzurihara, Toshiyuki Adachi, Tomohiro Yoneyama, Koichi Miyazaki
  • Publication number: 20220094269
    Abstract: A DC pulse power supply device (1) includes: a DC power supply (10); a pulsing unit (20A) that generates a pulse output using a step-up chopper circuit connected to the DC power supply; and a regeneration unit (30). The regeneration unit regenerates, to the DC power supply, the voltage component among a reactor voltage (VDCL) of a DC reactor (21A) in the step-up chopper circuit exceeding a set voltage. Thus, the voltage of the step-up chopper circuit is clamped to a prescribed voltage to suppress excessive voltage increases. Moreover, resistor energy consumption is eliminated and the efficiency of supplying power to a load is boosted by regeneration to the DC power supply.
    Type: Application
    Filed: November 8, 2019
    Publication date: March 24, 2022
    Applicant: KYOSAN ELECTRIC MFG. CO., LTD.
    Inventors: Itsuo Yuzurihara, Toshiyuki Adachi, Tomohiro Yoneyama, Koichi Miyazaki
  • Publication number: 20220094261
    Abstract: This DC pulse power supply device includes: a DC power supply unit (10); and a pulsing unit (20) that generates a pulse output using a step-up chopper circuit connected to the DC power supply unit. A clamp voltage unit (30) has an output end that is connected to a connection point (s) between a switching element (22) and a DC reactor (21), and applies a clamp voltage (VC) to one end of the switching element (22). During an off period (Toff) of the step-up chopper circuit, the voltage at both ends of the switching element is clamped so as to prevent damage to the switching element, suppress output voltage fluctuations resulting from load current fluctuations, and suppress power loss caused by a load current and a discharge current flowing through a resistor.
    Type: Application
    Filed: November 8, 2019
    Publication date: March 24, 2022
    Applicant: KYOSAN ELECTRIC MFG. CO., LTD.
    Inventors: Itsuo Yuzurihara, Toshiyuki Adachi, Tomohiro Yoneyama, Koichi Miyazaki
  • Patent number: 11282244
    Abstract: Provided are a moving body tracking apparatus that contributes to shortening treatment time and a radiation therapy system including the moving body tracking apparatus, a program, and a moving body tracking method. The moving body tracking apparatus includes a fluoroscopic apparatus that acquires fluoroscopic images including the target 2 from at least two directions, and the moving body tracking control apparatus 30A that obtains a position of the target 2 from the fluoroscopic images acquired by the fluoroscopic apparatus. The moving body tracking control apparatus 30A creates a simulated fluoroscopic image from the CT image including the target 2, creates a two-dimensional region including the target 2 from the simulated fluoroscopic image as a template, matches each of at least two fluoroscopic images with the template, and obtains a three-dimensional position of the target 2 from a plurality of matching results.
    Type: Grant
    Filed: February 6, 2020
    Date of Patent: March 22, 2022
    Assignees: HITACHI, LTD., NATIONAL UNIVERSITY CORPORATION HOKKAIDO UNIVERSITY
    Inventors: Toru Umekawa, Koichi Miyazaki, Takaaki Fujii, Shinichi Shimizu, Seishin Takao, Kikuo Umegaki, Naoki Miyamoto, Norio Katoh
  • Patent number: 11049252
    Abstract: The moving object tracking apparatus emphasizes an image with specific size in each of fluoroscopic images derived from two or more paired fluoroscopic radiographic devices, obtains a value indicating certainty degree of detecting a candidate position of the object to be tracked on the image subjected to the emphasizing process, extracts the candidate position based on the value indicating the certainty degree of detection, calculates a value indicating a correlation between the candidate position extracted from images picked up from two or more directions, and a position of the fluoroscopic radiation generator, detects the position of the object to be tracked based on the value indicating the certainty degree of detection, and the value indicating the correlation, and controls irradiation of radiation to an irradiation target based on the detected position of the object to be tracked.
    Type: Grant
    Filed: December 5, 2019
    Date of Patent: June 29, 2021
    Assignee: HITACHI, LTD.
    Inventors: Koichi Miyazaki, Toru Umekawa, Yusuke Fujii
  • Publication number: 20210012500
    Abstract: The moving object tracking apparatus emphasizes an image with specific size in each of fluoroscopic images derived from two or more paired fluoroscopic radiographic devices, obtains a value indicating certainty degree of detecting a candidate position of the object to be tracked on the image subjected to the emphasizing process, extracts the candidate position based on the value indicating the certainty degree of detection, calculates a value indicating a correlation between the candidate position extracted from images picked up from two or more directions, and a position of the fluoroscopic radiation generator, detects the position of the object to be tracked based on the value indicating the certainty degree of detection, and the value indicating the correlation, and controls irradiation of radiation to an irradiation target based on the detected position of the object to be tracked.
    Type: Application
    Filed: December 5, 2019
    Publication date: January 14, 2021
    Inventors: Koichi MIYAZAKI, Toru UMEKAWA, Yusuke FUJII
  • Publication number: 20200311988
    Abstract: Provided are a moving body tracking apparatus that contributes to shortening treatment time and a radiation therapy system including the moving body tracking apparatus, a program, and a moving body tracking method. The moving body tracking apparatus includes a fluoroscopic apparatus that acquires fluoroscopic images including the target 2 from at least two directions, and the moving body tracking control apparatus 30A that obtains a position of the target 2 from the fluoroscopic images acquired by the fluoroscopic apparatus. The moving body tracking control apparatus 30A creates a simulated fluoroscopic image from the CT image including the target 2, creates a two-dimensional region including the target 2 from the simulated fluoroscopic image as a template, matches each of at least two fluoroscopic images with the template, and obtains a three-dimensional position of the target 2 from a plurality of matching results.
    Type: Application
    Filed: February 6, 2020
    Publication date: October 1, 2020
    Inventors: Toru UMEKAWA, Koichi MIYAZAKI, Takaaki FUJII, Shinichi SHIMIZU, Seishin TAKAO, Kikuo UMEGAKI, Naoki MIYAMOTO, Norio KATOH
  • Patent number: 10508130
    Abstract: Provided is a crystalline polymorphic form A of 15?-hydroxy-osaterone acetate having an improved stability (storage stability, pulverization stability, and absorption characteristics). In a powder X-ray diffraction spectrum, characteristic diffraction peaks of the crystalline polymorphic form A of 15?-hydroxy-osaterone acetate appear at diffraction angles 2? of 9.6°±0.2°, 17.1°±0.2°, and 20.2°±0.2°. The crystalline polymorphic form A has a melting point of 280 to 283° C. and is a prism crystal.
    Type: Grant
    Filed: May 10, 2017
    Date of Patent: December 17, 2019
    Assignee: ASKA PHARMACEUTICAL CO., LTD.
    Inventors: Takayoshi Nakagawa, Hiroyuki Hayashi, Koichi Miyazaki, Shigeki Iwashita
  • Publication number: 20190175941
    Abstract: The present invention makes it possible to provide a radiation therapy system capable of not only inhibiting treatment time from increasing more effectively than before but also reducing the loads of fluoroscopic radiation photographing apparatuses.
    Type: Application
    Filed: November 27, 2018
    Publication date: June 13, 2019
    Inventors: Koichi MIYAZAKI, Naoki MIYAMOTO
  • Publication number: 20190127417
    Abstract: Provided is a crystalline polymorphic form A of 15?-hydroxy-osaterone acetate having an improved stability (storage stability, pulverization stability, and absorption characteristics). In a powder X-ray diffraction spectrum, characteristic diffraction peaks of the crystalline polymorphic form A of 15?-hydroxy-osaterone acetate appear at diffraction angles 2? of 9.6°±0.2°, 17.1°±0.2°, and 20.2°±0.2°. The crystalline polymorphic form A has a melting point of 280 to 283° C. and is a prism crystal.
    Type: Application
    Filed: May 10, 2017
    Publication date: May 2, 2019
    Applicant: ASKA Pharmaceutical Co., Ltd.
    Inventors: Takayoshi NAKAGAWA, Hiroyuki HAYASHI, Koichi MIYAZAKI, Shigeki IWASHITA
  • Patent number: 9643993
    Abstract: A novel crystalline polymorphic form of ulipristal acetate useful as an agent for preventing and/or treating uterine leiomyoma and as a contraceptive, and a process for producing the crystalline polymorphic form are provided. The novel crystalline polymorphic form of ulipristal acetate is obtained by dissolving an isopropanol-solvated crystal of ulipristal acetate in a mixed solvent containing ethanol and water, and crystallizing an ulipristal acetate from the solution without addition of a seed crystal to the solution.
    Type: Grant
    Filed: September 26, 2013
    Date of Patent: May 9, 2017
    Assignee: Aska Pharmaceutical Co., Ltd.
    Inventors: Shigeki Iwashita, Hiroyuki Hayashi, Koichi Miyazaki
  • Patent number: 9643994
    Abstract: A novel crystalline polymorphic form of ulipristal acetate useful as an agent for preventing and/or treating uterine leiomyoma and as a contraceptive, and a process for producing the crystalline polymorphic form are provided. The novel crystalline polymorphic form of ulipristal acetate is obtained by crystallization or transition in association with a specified solvent. The solvent comprises at least one member selected from the group consisting of water, an aliphatic hydrocarbon, an aromatic hydrocarbon, a halogenated hydrocarbon, a linear alcohol, an alkyl ether, an acetate ester, an alkyl ketone, an N-alkylacylamide, and an alkanenitrile.
    Type: Grant
    Filed: September 26, 2013
    Date of Patent: May 9, 2017
    Assignee: Aska Pharmaceutical Co., Ltd.
    Inventors: Shigeki Iwashita, Hiroyuki Hayashi, Koichi Miyazaki
  • Publication number: 20150246943
    Abstract: A novel crystalline polymorphic form of ulipristal acetate useful as an agent for preventing and/or treating uterine leiomyoma and as a contraceptive, and a process for producing the crystalline polymorphic form are provided. The novel crystalline polymorphic form of ulipristal acetate is obtained by crystallization or transition in association with a specified solvent. The solvent comprises at least one member selected from the group consisting of water, an aliphatic hydrocarbon, an aromatic hydrocarbon, a halogenated hydrocarbon, a linear alcohol, an alkyl ether, an acetate ester, an alkyl ketone, an N-alkylacylamide, and an alkanenitrile.
    Type: Application
    Filed: September 26, 2013
    Publication date: September 3, 2015
    Inventors: Shigeki Iwashita, Hiroyuki Hayashi, Koichi Miyazaki
  • Publication number: 20150239927
    Abstract: A novel crystalline polymorphic form of ulipristal acetate useful as an agent for preventing and/or treating uterine leiomyoma and as a contraceptive, and a process for producing the crystalline polymorphic form are provided. The novel crystalline polymorphic form of ulipristal acetate is obtained by dissolving an isopropanol-solvated crystal of ulipristal acetate in a mixed solvent containing ethanol and water, and crystallizing an ulipristal acetate from the solution without addition of a seed crystal to the solution.
    Type: Application
    Filed: September 26, 2013
    Publication date: August 27, 2015
    Inventors: Shigeki Iwashita, Hiroyuki Hayashi, Koichi Miyazaki
  • Patent number: 9006253
    Abstract: The invention provides a crystal of 2-(3,4-dichlorobenzyl)-5-methyl-4-oxo-3,4-dihydrothieno[2,3-d]pyrimidine-6-carboxylic acid (which has the chemical structure shown below) and a mixed crystal comprising such a crystal. The invention also provides methods of producing such crystals, pharmaceutical compositions comprising such crystals, and methods of modulating phosphodiesterase-9 activity and treating disorders such as overactive bladder syndrome by administration of an effective amount of the crystals.
    Type: Grant
    Filed: March 26, 2014
    Date of Patent: April 14, 2015
    Assignee: ASKA Pharmaceutical Co., Ltd.
    Inventors: Hiroyuki Hayashi, Takayoshi Nakagawa, Koichi Miyazaki
  • Publication number: 20140235655
    Abstract: The invention provides a crystal of 2-(3,4-dichlorobenzyl)-5-methyl-4-oxo-3,4-dihydrothieno[2,3-d]pyrimidine-6-carboxylic acid (which has the chemical structure shown below) and a mixed crystal comprising such a crystal. The invention also provides methods of producing such crystals, pharmaceutical compositions comprising such crystals, and methods of modulating phosphodiesterase-9 activity and treating disorders such as overactive bladder syndrome by administration of an effective amount of the crystals.
    Type: Application
    Filed: March 26, 2014
    Publication date: August 21, 2014
    Applicant: ASKA Pharmaceutical Co., Ltd.
    Inventors: Hiroyuki HAYASHI, Takayoshi NAKAGAWA, Koichi MIYAZAKI