Patents by Inventor Taisuke TAKAYANAGI

Taisuke TAKAYANAGI 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).

  • Patent number: 11320504
    Abstract: An open-type MRI apparatus includes a pair of static magnetic field magnets and a pair of gradient magnetic field coils. Each static magnetic field magnet includes a discoid magnetic pole configured to generate a static magnetic field in a Z axis direction in which the pair of static magnetic field magnets are opposed each other, and an annular magnetic pole configured to generate a static magnetic field on an X-Y plane perpendicular to the Z axis direction. Each gradient magnetic field coil includes a Z coil configured to provide a magnetic field being gradient in the Z axis direction in the imaging region, a magnetic material block configured to shield the discoid magnetic pole from a magnetic flux generated from the Z coil, and a correction coil configured to shield the annular magnetic pole from the magnetic flux generated from the Z coil.
    Type: Grant
    Filed: March 9, 2021
    Date of Patent: May 3, 2022
    Assignee: FUJIFILM HEALTHCARE CORPORATION
    Inventors: Taisuke Takayanagi, Manabu Aoki, Yukinobu Imamura, Hiroyuki Takeuchi
  • Publication number: 20210333341
    Abstract: An open-type MRI apparatus includes a pair of static magnetic field magnets and a pair of gradient magnetic field coils. Each static magnetic field magnet includes a discoid magnetic pole configured to generate a static magnetic field in a Z axis direction in which the pair of static magnetic field magnets are opposed each other, and an annular magnetic pole configured to generate a static magnetic field on an X-Y plane perpendicular to the Z axis direction. Each gradient magnetic field coil includes a Z coil configured to provide a magnetic field being gradient in the Z axis direction in the imaging region, a magnetic material block configured to shield the discoid magnetic pole from a magnetic flux generated from the Z coil, and a correction coil configured to shield the annular magnetic pole from the magnetic flux generated from the Z coil.
    Type: Application
    Filed: March 9, 2021
    Publication date: October 28, 2021
    Inventors: Taisuke TAKAYANAGI, Manabu AOKI, Yukinobu IMAMURA, Hiroyuki TAKEUCHI
  • Patent number: 11033755
    Abstract: There is provided a treatment planning system and a particle therapy system. In the related art, it is unable to determine optimum beam intensity in irradiation for which discrete spot irradiation and continuous beam irradiation coexist. There is provided a treatment planning system that includes a spot determination unit that divides an irradiation region to be irradiated with a charged particle beam into a plurality of layers in an advancing direction of the charged particle beam and disposes a plurality of irradiation spots, which becomes irradiation points of the charged particle beam, in the layers and a beam intensity determination unit that determines beam intensity for each of the layers by evaluating the irradiation time by changing the beam intensity in a range of a condition of change in dose distribution which is set in advance.
    Type: Grant
    Filed: November 24, 2017
    Date of Patent: June 15, 2021
    Assignee: HITACHI, LTD.
    Inventors: Takahiro Yamada, Taisuke Takayanagi, Rintarou Fujimoto, Shinichiro Fujitaka, Takuya Nomura
  • Patent number: 10751546
    Abstract: Provided are a radiation treatment planning system and a radiation treatment system that are capable of achieving time shortening and labor saving of treatment planning making when a radiation treatment is planned. A predicted DVH calculation portion 4034 of an arithmetic processing device 403 in a radiation treatment planning system 400 anisotropically enlarges a target region 501 in an irradiated body image which is input to the radiation treatment planning system 400, and calculates an overlap volume OV with an organ-at-risk region 502 per the number of times of enlargement. A DVH (Dose Volume Histogram) is predicted from a volume of the calculated OV, and a dose histogram in the OV per the number of times of enlargement which is calculated from a past treatment planning data group, and is displayed on a display device 401.
    Type: Grant
    Filed: November 7, 2017
    Date of Patent: August 25, 2020
    Assignees: HITACHI, LTD., NATIONAL UNIVERSITY CORPORATION HOKKAIDO UNIVERSITY
    Inventors: Taisuke Takayanagi, Toru Umekawa, Shinichiro Fujitaka, Seishin Takao
  • Patent number: 10456596
    Abstract: The invention provides a particle therapy system in which whether to perform any one irradiation method of a raster scanning method and a discrete spot scanning method can also be selected based on previous selection depending on a target volume 41 of a patient 4 to be irradiated, and either of the irradiation methods of the raster scanning method and the discrete spot scanning method is configured to be capable of being performed by one irradiation apparatus 500. Therefore, a small particle therapy system capable of achieving both higher accuracy irradiation and high dose rate improvement is provided.
    Type: Grant
    Filed: November 13, 2015
    Date of Patent: October 29, 2019
    Assignee: Hitachi, Ltd.
    Inventors: Masumi Umezawa, Shinichiro Fujitaka, Taisuke Takayanagi
  • Publication number: 20190265679
    Abstract: The object of the invention is to estimate a causal relation between predetermined data at high precision and at ease, taking nonlinearity between the data into consideration. A work improvement support device is comprised of a nonlinear term adding unit for calculating a nonlinear value as for respective working data in the working data group and adding the nonlinear value to a working data group, a multiple regression analysis unit for calculating a regression formula as for respective working data according to the multiple linear regression analysis, a data group setting unit for determining whether there is a linear term in the calculated regression formula and setting the predetermined data comprising the linear term and the objective variable of the regression formula as the same group, and an explanatory variable candidate selecting unit for selecting the working data, excluding the predetermined data, as the explanatory variable candidates for the multiple linear regression analysis.
    Type: Application
    Filed: January 19, 2018
    Publication date: August 29, 2019
    Inventors: Taisuke TAKAYANAGI, Kojin YANO, Kenichirou OKADA
  • Patent number: 10376713
    Abstract: A radiation therapy planning apparatus performs dose calculation at high speed and with high accuracy for radiation therapy in a scanning irradiation method. The apparatus includes a display, an arithmetic processing apparatus, a memory, and a data server, which is connected to a particle beam irradiation apparatus. A dose calculation unit of the arithmetic processing apparatus calculates dose distribution by a simplified Monte Carlo algorithm, and corrects the dose distribution by a decreasing rate stored in a particle number decreasing rate table of the memory, and stores the corrected dose distribution in an integrated dose distribution table. By using the simplified Monte Carlo algorithm and the particle number decreasing rate that corrects the simplified Monte Carlo algorithm, the dose distribution is calculated, and thereby, it is possible to realize a radiation therapy planning apparatus that performs dose calculation at a high speed with high accuracy.
    Type: Grant
    Filed: May 12, 2015
    Date of Patent: August 13, 2019
    Assignee: Hitachi, Ltd.
    Inventors: Taisuke Takayanagi, Shusuke Hirayama, Shinichiro Fujitaka
  • Patent number: 10143436
    Abstract: The particle therapy system includes a particle beam generator for generating a particle beam; an irradiation nozzle arranged in a treatment room and irradiating a target with the particle beam; a particle beam transport system communicating the particle beam generator with the irradiation nozzle; an X-ray imaging device arranged in the treatment room and imaging the position of the target through irradiation with X-rays; a dosimeter arranged at a position passed by the particle beam in the irradiation nozzle; and a control apparatus performing control to exclude the measurement result of the X-rays from the measurement result obtained using the dosimeter when the X-rays are emitted during treatment.
    Type: Grant
    Filed: October 10, 2013
    Date of Patent: December 4, 2018
    Assignee: Hitachi, Ltd.
    Inventors: Arao Nishimura, Koji Matsuda, Ryosuke Shinagawa, Taisuke Takayanagi, Masahiro Tadokoro, Takao Kidani, Hideaki Nihongi, Kikuo Umegaki, Taeko Matsuura
  • Publication number: 20180326224
    Abstract: The invention provides a particle therapy system in which whether to perform any one irradiation method of a raster scanning method and a discrete spot scanning method can also be selected based on previous selection depending on a target volume 41 of a patient 4 to be irradiated, and either of the irradiation methods of the raster scanning method and the discrete spot scanning method is configured to be capable of being performed by one irradiation apparatus 500. Therefore, a small particle therapy system capable of achieving both higher accuracy irradiation and high dose rate improvement is provided.
    Type: Application
    Filed: November 13, 2015
    Publication date: November 15, 2018
    Inventors: Masumi UMEZAWA, Shinichiro FUJITAKA, Taisuke TAKAYANAGI
  • Publication number: 20180200534
    Abstract: There is provided a treatment planning system and a particle therapy system. In the related art, it is unable to determine optimum beam intensity in irradiation for which discrete spot irradiation and continuous beam irradiation coexist. There is provided a treatment planning system that includes a spot determination unit that divides an irradiation region to be irradiated with a charged particle beam into a plurality of layers in an advancing direction of the charged particle beam and disposes a plurality of irradiation spots, which becomes irradiation points of the charged particle beam, in the layers and a beam intensity determination unit that determines beam intensity for each of the layers by evaluating the irradiation time by changing the beam intensity in a range of a condition of change in dose distribution which is set in advance.
    Type: Application
    Filed: November 24, 2017
    Publication date: July 19, 2018
    Inventors: Takahiro YAMADA, Taisuke TAKAYANAGI, Rintarou FUJIMOTO, Shinichiro FUJITAKA, Takuya NOMURA
  • Publication number: 20180126188
    Abstract: Provided are a radiation treatment planning system and a radiation treatment system that are capable of achieving time shortening and labor saving of treatment planning making when a radiation treatment is planned. A predicted DVH calculation portion 4034 of an arithmetic processing device 403 in a radiation treatment planning system 400 anisotropically enlarges a target region 501 in an irradiated body image which is input to the radiation treatment planning system 400, and calculates an overlap volume OV with an organ-at-risk region 502 per the number of times of enlargement. A DVH (Dose Volume Histogram) is predicted from a volume of the calculated OV, and a dose histogram in the OV per the number of times of enlargement which is calculated from a past treatment planning data group, and is displayed on a display device 401.
    Type: Application
    Filed: November 7, 2017
    Publication date: May 10, 2018
    Inventors: Taisuke TAKAYANAGI, Toru UMEKAWA, Shinichiro FUJITAKA, Seishin TAKAO
  • Patent number: 9899112
    Abstract: A structure configuring a ridge filter has line symmetry about a line vertical to a depth direction passing the center of the structure. A small structure obtained in such a way that the structure is divided by this line has a bilaterally asymmetric shape about a center line in an iterative direction, and has a point symmetric shape about an intersection between the center line in the iterative direction and the center line in the depth direction. Thicknesses in the iterative direction of an uppermost stream surface and a lowermost stream surface in the depth direction are equal to each other. The structure is configured so that a thick portion in the iterative direction of the uppermost stream surface and the lowermost stream surface is not present in the depth direction.
    Type: Grant
    Filed: February 21, 2017
    Date of Patent: February 20, 2018
    Assignees: Hitachi, Ltd., National University Corporation Hokkaido University
    Inventors: Taisuke Takayanagi, Shinichiro Fujitaka, Chihiro Nakashima, Tomoki Murata, Taeko Matsuura, Naoki Miyamoto, Kikuo Umegaki, Yuichi Hirata
  • Publication number: 20170304651
    Abstract: A radiation therapy planning apparatus performs dose calculation at high speed and with high accuracy for radiation therapy in a scanning irradiation method. The apparatus includes a display, an arithmetic processing apparatus, a memory, and a data server, which is connected to a particle beam irradiation apparatus. A dose calculation unit of the arithmetic processing apparatus calculates dose distribution by a simplified Monte Carlo algorithm, and corrects the dose distribution by a decreasing rate stored in a particle number decreasing rate table of the memory, and stores the corrected dose distribution in an integrated dose distribution table. By using the simplified Monte Carlo algorithm and the particle number decreasing rate that corrects the simplified Monte Carlo algorithm, the dose distribution is calculated, and thereby, it is possible to realize a radiation therapy planning apparatus that performs dose calculation at a high speed with high accuracy.
    Type: Application
    Filed: May 12, 2015
    Publication date: October 26, 2017
    Inventors: Taisuke TAKAYANAGI, Shusuke HIRAYAMA, Shinichiro FUJITAKA
  • Publication number: 20170243665
    Abstract: A structure configuring a ridge filter has line symmetry about a line vertical to a depth direction passing the center of the structure. A small structure obtained in such a way that the structure is divided by this line has a bilaterally asymmetric shape about a center line in an iterative direction, and has a point symmetric shape about an intersection between the center line in the iterative direction and the center line in the depth direction. Thicknesses in the iterative direction of an uppermost stream surface and a lowermost stream surface in the depth direction are equal to each other. The structure is configured so that a thick portion in the iterative direction of the uppermost stream surface and the lowermost stream surface is not present in the depth direction.
    Type: Application
    Filed: February 21, 2017
    Publication date: August 24, 2017
    Inventors: Taisuke TAKAYANAGI, Shinichiro FUJITAKA, Chihiro NAKASHIMA, Tomoki MURATA, Taeko MATSUURA, Naoki MIYAMOTO, Kikuo UMEGAKI, Yuichi HIRATA
  • Patent number: 9492684
    Abstract: The present invention provides a particle therapy system including an irradiation compensating device made up of an energy absorber, a first collimator, and a second collimator for use in a short-range region. The irradiation compensating device is characterized by a mechanism for attaching and detaching the first energy absorber, first collimator, and second collimator. The first collimator is located upstream where the beam diameter is small with a view to suppressing the width of the compensating device, thereby contributing to making the compensating device small and lightweight. The second collimator is located downstream to improve penumbrae.
    Type: Grant
    Filed: October 10, 2013
    Date of Patent: November 15, 2016
    Assignee: Hitachi, Ltd.
    Inventors: Taisuke Takayanagi, Koji Matsuda, Ryosuke Shinagawa, Chihiro Nakashima, Arao Nishimura, Hiroki Shirato, Taeko Matsuura, Shinichi Shimizu, Rikiya Onimaru, Kikuo Umegaki
  • Publication number: 20150374324
    Abstract: There is provided a particle therapy system including: a particle beam generator for generating a particle beam; an irradiation nozzle arranged in a treatment room and irradiating a target with the particle beam; a particle beam transport system 6 communicating the particle beam generator with the irradiation nozzle; an X-ray imaging device arranged in the treatment room and imaging the position of the target through irradiation with X-rays; a dosimeter 8 arranged at a position passed by the particle beam in the irradiation nozzle; and a control apparatus 400 performing control to exclude the measurement result of the X-rays from the measurement result obtained using the dosimeter 8 when the X-rays are emitted during treatment.
    Type: Application
    Filed: October 10, 2013
    Publication date: December 31, 2015
    Inventors: Arao NISHIMURA, Koji MATSUDA, Ryosuke SHINAGAWA, Taisuke TAKAYANAGI, Masahiro TADOKORO, Takao KIDANI, Hideaki NIHONGI, Kikuo UMEGAKI, Taeko MATSUURA
  • Publication number: 20150352372
    Abstract: The present invention provides a particle therapy system including an irradiation compensating device made up of an energy absorber, a first collimator, and a second collimator for use in a short-range region. The irradiation compensating device is characterized by a mechanism for attaching and detaching the first energy absorber, first collimator, and second collimator. The first collimator is located upstream where the beam diameter is small with a view to suppressing the width of the compensating device, thereby contributing to making the compensating device small and lightweight. The second collimator is located downstream to improve penumbrae.
    Type: Application
    Filed: October 10, 2013
    Publication date: December 10, 2015
    Inventors: Taisuke TAKAYANAGI, Koji MATSUDA, Ryosuke SHINAGAWA, Chihiro NAKASHIMA, Arao NISHIMURA, Hiroki SHIRATO, Taeko MATSUURA, Shinichi SHIMIZU, Rikiya ONIMARU, Kikuo UMEGAKI
  • Patent number: 9188685
    Abstract: A stacked type of radiation detector and a calibration method that enables the radiation detector to correct variations in sensor-specific output easily and within a short time, without using a water-phantom dose detector. The radiation detector is equipped with a sensor section including a plurality of sensors arranged in layers in a traveling direction of a particle beam. A dummy absorber has water-equivalent thickness equal to an average water-equivalent thickness of the sensors. A signal-processing unit calculates sensor-specific calibration coefficients using a measurement result obtained during irradiation of the radiation detector with the radiation when electrical signals developed in each sensor are measured, and a measurement result obtained during irradiation of the radiation detector with the radiation when the sensor section is moved in the traveling direction of the radiation, then the dummy absorber is set in place, and electrical signals developed in each sensor are measured.
    Type: Grant
    Filed: February 25, 2013
    Date of Patent: November 17, 2015
    Assignee: HITACHI, LTD.
    Inventors: Taisuke Takayanagi, Hideaki Nishiuchi, Masahiro Tadokoro, Yusuke Fujii, Takeji Sakae, Toshiyuki Terunuma
  • Patent number: 9132285
    Abstract: A radiation measuring device having a plurality of sensors configured to generate charges in response to the radiation includes a signal processing device. The signal processing device uses an signal generated by a proton beam irradiation device upon changing of beam energy and causes accumulation values of charges output from the sensors to be separately stored in a main control device for each value of the energy. The main control device calculates depth dose profiles for values of the beam energy from the accumulation values stored in the main control device and representing the charges. The main control device calculates a range of the beam for each of the values of the beam energy from the depth dose profiles, corrects the depth dose profiles for the values of the beam energy using a correction coefficient that depends on the range and sums the corrected depth dose profiles.
    Type: Grant
    Filed: September 26, 2014
    Date of Patent: September 15, 2015
    Assignee: HITACHI, LTD.
    Inventors: Taisuke Takayanagi, Shinichiro Fujitaka, Chihiro Nakashima, Koji Matsuda
  • Publication number: 20150099918
    Abstract: A radiation measuring device having a plurality of sensors configured to generate charges in response to the radiation includes a signal processing device. The signal processing device uses an signal generated by a proton beam irradiation device upon changing of beam energy and causes accumulation values of charges output from the sensors to be separately stored in a main control device for each value of the energy. The main control device calculates depth dose profiles for values of the beam energy from the accumulation values stored in the main control device and representing the charges. The main control device calculates a range of the beam for each of the values of the beam energy from the depth dose profiles, corrects the depth dose profiles for the values of the beam energy using a correction coefficient that depends on the range and sums the corrected depth dose profiles.
    Type: Application
    Filed: September 26, 2014
    Publication date: April 9, 2015
    Inventors: Taisuke TAKAYANAGI, Shinichiro FUJITAKA, Chihiro NAKASHIMA, Koji MATSUDA