Patents by Inventor Taeko Matsuura

Taeko Matsuura 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: 20210154495
    Abstract: A particle therapy system includes an accelerator 1 which generates a particle beam for extraction, an irradiation apparatus 21 which irradiates the particle beam to an irradiation target 26, a gantry 18 which rotates together with the irradiation apparatus 21, and an MRI apparatus 50 which rotates together with the gantry 18. The MRI apparatus 50 includes a magnetic circuit composed of an iron core 60 and a plurality of coils 61 serving as a magnetic flux source. The iron core 60 includes two oppositely disposed magnetic poles 63A and 63B, and a return yoke 64 for connecting the magnetic poles 63A and 63B. The magnetic poles 63A, 63B have cavities 65A, 65B. The particle beam passing through the cavity 65A is irradiated to the irradiation target 26.
    Type: Application
    Filed: April 11, 2019
    Publication date: May 27, 2021
    Inventors: Yusuke FUJII, Ryuya ANDO, Manabu AOKI, Kikuo UMEGAKI, Shinichi SHIMIZU, Taeko MATSUURA, Hiroki SHIRATO
  • Patent number: 10835764
    Abstract: A function/process of recording marker position data and spot data is provided. The marker position data includes position information of a marker 29 measured for tumor tracking irradiation and information on time of execution of X-ray imaging. The spot data includes information on time of irradiation of each spot, a delivered irradiation position, and a delivered irradiation amount. The marker position data and the spot data are synchronized based on the time information, and by using the marker position data and the spot data upon spot irradiation, a delivered dose distribution of proton irradiation is calculated. With this configuration, it is possible to take the influence of interplay effect into consideration, and it is possible to support to make more appropriate determination upon replanning of a treatment plan.
    Type: Grant
    Filed: March 23, 2017
    Date of Patent: November 17, 2020
    Assignees: HITACHI, LTD., NATIONAL UNIVERSITY CORPORATION HOKKAIDO UNIVERSITY
    Inventors: Yusuke Fujii, Taeko Matsuura, Yuka Matsuzaki, Kikuo Umegaki, Hiroki Shirato, Hidenori Koyano, Takahiro Yamada, Rintarou Fujimoto
  • Publication number: 20200054897
    Abstract: A function/process of recording marker position data and spot data is provided. The marker position data includes position information of a marker 29 measured for tumor tracking irradiation and information on time of execution of X-ray imaging. The spot data includes information on time of irradiation of each spot, a delivered irradiation position, and a delivered irradiation amount. The marker position data and the spot data are synchronized based on the time information, and by using the marker position data and the spot data upon spot irradiation, a delivered dose distribution of proton irradiation is calculated. With this configuration, it is possible to take the influence of interplay effect into consideration, and it is possible to support to make more appropriate determination upon replanning of a treatment plan.
    Type: Application
    Filed: March 23, 2017
    Publication date: February 20, 2020
    Inventors: Yusuke FUJII, Taeko MATSUURA, Yuka MATSUZAKI, Kikuo UMEGAKI, Hiroki SHIRATO, Hidenori KOYANO, Takahiro YAMADA, Rintarou FUJIMOTO
  • Publication number: 20200009404
    Abstract: Through the present invention, three-dimensional coordinates of a tracking object moving in an irradiation object can be calculated from fluoroscopic X-ray images captured and acquired from various angles in a single fluoroscopic X-ray device mounted to a radiation therapy apparatus. The three-dimensional coordinates of the tracking object are calculated on a straight tracking object presence line connecting an X-ray generating device for fluoroscopy and the position in an X-ray plane detector of the tracking object on the fluoroscopic X-ray image acquired by the X-ray generating device for fluoroscopy and the X-ray plane detector, and using line segment information included in a movement region of the tracking object set in advance (S104).
    Type: Application
    Filed: March 12, 2018
    Publication date: January 9, 2020
    Inventors: Takaaki Fujii, Seishin Takao, Naoki Miyamoto, Taeko Matsuura, Kikuo Umegaki
  • 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
  • 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
  • Patent number: 9750957
    Abstract: A charged particle irradiation system is capable of shortening the irradiation time and the treatment time by performing efficient irradiation even when irregular variation occurs in the irradiation object during the gating irradiation. The extraction of the beam is stopped upon reception of a regular extraction permission end signal which is outputted based on a regular movement signal. An extractable state maintaining function operates upon the reception of the extraction permission end signal. When a preset standby time elapses without receiving an extraction permission start signal again during the standby time, the extractable state maintaining function finishes its operation and a charged particle beam generator decelerates the beam. Also, the extraction of the beam is stopped due to reception of an irregular extraction permission end signal during the irradiation. When the extraction permission start signal is received again during the standby time, the extraction of the beam is restarted.
    Type: Grant
    Filed: June 1, 2015
    Date of Patent: September 5, 2017
    Assignee: Hitachi, Ltd.
    Inventors: Yusuke Fujii, Toru Umekawa, Masumi Umezawa, Hiroki Shirato, Kikuo Umegaki, Naoki Miyamoto, Taeko Matsuura
  • 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: 9724049
    Abstract: A radiotherapy system acquires an image which is necessary for positioning of a patient for radiation treatment and enables grasping of a positional relationship of a target in a treatment radiation irradiated state, a radiation passing area and a critical organ. An X-ray imaging device is attached to the rotatable support device and configured to apply X-rays to the subject from plural directions while rotating around the subject to perform X-ray imaging. A target recognizing device recognizes a three-dimensional position of the target in the subject from X-ray images acquired by the X-ray imaging device; and CT image generating devices are configured to select, from the X-ray images acquired by the X-ray imaging device, the images in which the position of the target recognized by the recognizing device satisfies the treatment radiation irradiation condition for the motion tracking treatment to perform image reconstruction and generate a cone beam CT image.
    Type: Grant
    Filed: August 4, 2014
    Date of Patent: August 8, 2017
    Assignee: Hitachi, Ltd.
    Inventors: Toru Umekawa, Kazuo Hiramoto, Rika Baba, Toshie Sasaki, Yoshihiko Nagamine, Shinichi Shimizu, Seishin Takao, Naoki Miyamoto, Taeko Matsuura, Kikuo Umegaki
  • Patent number: 9616249
    Abstract: A radiotherapy control apparatus includes a fluoroscopic image acquisition unit to acquire fluoroscopic images of markers in a patient from a single fluoroscopic imaging device, a projection line calculation unit to identify projected positions of the markers on the fluoroscopic image and calculate equations of projection lines linking these projected positions and a focus position of the imaging device, an inter-marker distance acquisition unit to acquire a distance between each pair of the markers, a marker position calculation unit to calculate current positions of the markers based on the equations and the distances, and a therapeutic radiation emission determination unit to determine whether to emit therapeutic radiation based on the current positions of the markers.
    Type: Grant
    Filed: February 26, 2013
    Date of Patent: April 11, 2017
    Assignee: NATIONAL UNIVERSITY CORPORATION HOKKAIDO UNIVERSITY
    Inventors: Naoki Miyamoto, Shinichi Shimizu, Taeko Matsuura, Chie Toramatsu, Seishin Takao, Hideaki Nihongi, Yuichi Hirata, Kikuo Umegaki
  • 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
  • Publication number: 20150290475
    Abstract: A charged particle irradiation system is capable of shortening the irradiation time and the treatment time by performing efficient irradiation even when irregular variation occurs in the irradiation object during the gating irradiation. The extraction of the beam is stopped upon reception of a regular extraction permission end signal which is outputted based on a regular movement signal. An extractable state maintaining function operates upon the reception of the extraction permission end signal. When a preset standby time elapses without receiving an extraction permission start signal again during the standby time, the extractable state maintaining function finishes its operation and a charged particle beam generator decelerates the beam. Also, the extraction of the beam is stopped due to reception of an irregular extraction permission end signal during the irradiation. When the extraction permission start signal is received again during the standby time, the extraction of the beam is restarted.
    Type: Application
    Filed: June 1, 2015
    Publication date: October 15, 2015
    Inventors: Yusuke FUJII, Toru UMEKAWA, Masumi UMEZAWA, Hiroki SHIRATO, Kikuo UMEGAKI, Naoki MIYAMOTO, Taeko MATSUURA
  • Patent number: 9061144
    Abstract: A charged particle irradiation system is capable of shortening the irradiation time and the treatment time by performing efficient irradiation even when irregular variation occurs in the irradiation object during the gating irradiation. The extraction of the beam is stopped upon reception of a regular extraction permission end signal which is outputted based on a regular movement signal. An extractable state maintaining function operates upon the reception of the extraction permission end signal. When a preset standby time elapses without receiving an extraction permission start signal again during the standby time, the extractable state maintaining function finishes its operation and a charged particle beam generator decelerates the beam. Also, the extraction of the beam is stopped due to reception of an irregular extraction permission end signal during the irradiation. When the extraction permission start signal is received again during the standby time, the extraction of the beam is restarted.
    Type: Grant
    Filed: November 14, 2012
    Date of Patent: June 23, 2015
    Assignees: HITACHI, LTD., NATIONAL UNIVERSITY CORPORATION HOKKAIDO UNIVERSITY
    Inventors: Yusuke Fujii, Toru Umekawa, Masumi Umezawa, Hiroki Shirato, Kikuo Umegaki, Naoki Miyamoto, Taeko Matsuura
  • Publication number: 20150087881
    Abstract: [Problem to be Solved] To provide a radiotherapy control apparatus and radiotherapy control program capable of calculating the current positions of markers implanted in a patient by means of a single fluoroscopic imaging device and reducing a radiation exposure dose inflicted on the patient by radiographic radiation used for fluoroscopic observation during radiotherapy. [Solution] The present invention includes a fluoroscopic image acquisition unit 41 adapted to acquire a fluoroscopic image of three or more markers from a single fluoroscopic imaging device 12, a projection line calculation unit 38 adapted to calculate equations of respective projection lines, an inter-marker distance acquisition unit 42 adapted to acquire each distance between each pair of the markers, a marker position calculation unit 43 adapted to calculate current positions of the respective markers, and a therapeutic radiation emission determination unit 44 adapted to determine whether to emit therapeutic radiation.
    Type: Application
    Filed: February 26, 2013
    Publication date: March 26, 2015
    Applicant: NATIONAL UNIVERSITY CORPORATION HOKKAIDO UNIVERSITY
    Inventors: Naoki Miyamoto, Shinichi Shimizu, Taeko Matsuura, Chie Toramatsu, Seishin Takao, Hideaki Nihongi, Yuichi Hirata, Kikuo Umegaki
  • Publication number: 20150036793
    Abstract: A radiotherapy system acquires an image which is necessary for positioning of a patient for radiation treatment and enables grasping of a positional relationship of a target in a treatment radiation irradiated state, a radiation passing area and a critical organ. An X-ray imaging device is attached to the rotatable support device and configured to apply X-rays to the subject from plural directions while rotating around the subject to perform X-ray imaging. A target recognizing device recognizes a three-dimensional position of the target in the subject from X-ray images acquired by the X-ray imaging device; and CT image generating devices are configured to select, from the X-ray images acquired by the X-ray imaging device, the images in which the position of the target recognized by the recognizing device satisfies the treatment radiation irradiation condition for the motion tracking treatment to perform image reconstruction and generate a cone beam CT image.
    Type: Application
    Filed: August 4, 2014
    Publication date: February 5, 2015
    Inventors: Toru UMEKAWA, Kazuo HIRAMOTO, Rika BABA, Toshie SASAKI, Yoshihiko NAGAMINE, Shinichi SHIMIZU, Seishin TAKAO, Naoki MIYAMOTO, Taeko MATSUURA, Kikuo UMEGAKI
  • Publication number: 20140330066
    Abstract: A charged particle irradiation system is capable of shortening the irradiation time and the treatment time by performing efficient irradiation even when irregular variation occurs in the irradiation object during the gating irradiation. The extraction of the beam is stopped upon reception of a regular extraction permission end signal which is outputted based on a regular movement signal. An extractable state maintaining function operates upon the reception of the extraction permission end signal. When a preset standby time elapses without receiving an extraction permission start signal again during the standby time, the extractable state maintaining function finishes its operation and a charged particle beam generator decelerates the beam. Also, the extraction of the beam is stopped due to reception of an irregular extraction permission end signal during the irradiation. When the extraction permission start signal is received again during the standby time, the extraction of the beam is restarted.
    Type: Application
    Filed: November 14, 2012
    Publication date: November 6, 2014
    Inventors: Yusuke Fujii, Toru Umekawa, Masumi Umezawa, Hiroki Shirato, Kikuo Umegaki, Naoki Miyamoto, Taeko Matsuura