Patents by Inventor Kikuo Umegaki

Kikuo Umegaki 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: 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: 10751552
    Abstract: A tumor tracking control device (41) performs windowing process on a captured image A (61) and a captured image B (62), measures a position of a marker (29) using the captured image A (61) and the captured image B (62) after performing the windowing process, and generates a signal capable of controlling irradiation with radiation based on the position of the marker (29). Accordingly, it is possible to provide a tumor tracking apparatus and an irradiation system which are capable of tracking an object to be tracked without erroneous detection, even in a case where a structure similar to the object to be tracked is in the vicinity of the object to be tracked, in tumor tracking.
    Type: Grant
    Filed: March 30, 2017
    Date of Patent: August 25, 2020
    Assignees: HITACHI, LTD., NATIONAL UNIVERSITY CORPORATION HOKKAIDO UNIVERSITY
    Inventors: Takahiro Yamada, Toru Umekawa, Yusuke Fujii, Naoki Miyamoto, Kikuo Umegaki
  • Publication number: 20200069968
    Abstract: A treatment planning apparatus 501 or a clinical decision support apparatus 701 calculates a dose distribution, calculates the damage to a normal tissue for a plurality of number of times of radiation irradiation based on the calculated dose distribution, and displays at least one or more calculated damages to the normal tissues on display apparatuses 603 and 703 or outputs the same to an outside of the apparatuses 501 and 701. Accordingly, since effects can be calculated for a plurality of number of times of irradiation, the optimum number of time of irradiation can be presented, and an operator and a doctor can be presented with a suitable decision material of a radiation irradiation planning.
    Type: Application
    Filed: December 19, 2016
    Publication date: March 5, 2020
    Inventors: Keiji KOBASHI, Masahiro MIZUTA, Hiroyuki DATE, Hiroki SHIRATO, Shinichi SHIMIZU, Kikuo UMEGAKI, Shusuke HIRAYAMA, Yusuke FUJII, Toru UMEKAWA, 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
  • Publication number: 20190143146
    Abstract: A template matching is performed on two fluoroscopic images by using a template image prepared in advance and a position corresponding to a high matching score is listed as a candidate for the position of a marker 29. From two lists of the candidates of the position of the marker 29, the lengths of common vertical lines for all combinations are calculated. Then, the position of the marker 29 is detected based on the matching score and the common vertical line. Then, based on the detected position of the marker 29, an amount of a proton beam to be irradiated to a target is controlled. Therefore, a tracking target can be accurately detected even when the conditions for X-ray fluoroscopy is severe, e.g., a thick object.
    Type: Application
    Filed: May 11, 2017
    Publication date: May 16, 2019
    Applicants: HITACHI, LTD., NATIONAL UNIVERSITY CORPORATION HOKKAIDO UNIVERSITY
    Inventors: Yusuke FUJII, Naoki MIYAMOTO, Kikuo UMEGAKI, Shinichi SHIMIZU, Toru UMEKAWA, Takahiro YAMADA
  • Publication number: 20190111282
    Abstract: A tumor tracking control device (41) performs windowing process on a captured image A (61) and a captured image B (62), measures a position of a marker (29) using the captured image A (61) and the captured image B (62) after performing the windowing process, and generates a signal capable of controlling irradiation with radiation based on the position of the marker (29). Accordingly, it is possible to provide a tumor tracking apparatus and an irradiation system which are capable of tracking an object to be tracked without erroneous detection, even in a case where a structure similar to the object to be tracked is in the vicinity of the object to be tracked, in tumor tracking.
    Type: Application
    Filed: March 30, 2017
    Publication date: April 18, 2019
    Inventors: Takahiro YAMADA, Toru UMEKAWA, Yusuke FUJII, Naoki MIYAMOTO, 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: 10085707
    Abstract: The present invention correlates information, to be processed, about an organ and/or a disease, etc., obtained from a medical image and anatomical/functional medical knowledge information, and enables the information obtained from the medial image to be effectively utilized in medical examination and treatment processes. In a medical image information system (101), an image processing unit (103) processes an image, a graph model creation unit (104) creates a graph data model from the information obtained from the image, a graph data model processing unit (106) acquires a graph data model based on anatomical/functional medical knowledge, compares with each other and integrates the graph data models and stores an integrated graph data model, and a display processing unit (110) displays the integrated graph data model, whereby the effective use of information obtained from the image is made possible.
    Type: Grant
    Filed: March 30, 2015
    Date of Patent: October 2, 2018
    Assignee: Hitachi, Ltd.
    Inventors: Kazuki Matsuzaki, Yuuichi Morimoto, Wataru Takeuchi, Kikuo Umegaki, Tohru Shiga, Koichi Yasuda
  • 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: 9757590
    Abstract: First ions and second ions that are heavier than first ions are generated in an ion source. One kind of ions of the first ions and second ions is injected into an accelerator by action of a switching magnet and accelerated in the accelerator. An ion beam including the one kind of ions is extracted from the accelerator to a beam transport system and a tumor volume of a patient is irradiated with the ion beam from an irradiation nozzle. In the irradiation of the ion beam, a tumor volume depth and the largest underwater range of each ion species are compared, and an ion species in which the tumor volume depth becomes the longest underwater range or lower is injected into the accelerator, and accelerated by the accelerator. The tumor volume is irradiated with the ion species.
    Type: Grant
    Filed: October 27, 2014
    Date of Patent: September 12, 2017
    Assignees: Hitachi, Ltd., National University Corporation Hokkaido University
    Inventors: Kazuo Hiramoto, Masumi Umezawa, Shinichiro Fujitaka, Hiroki Shirato, Shinichi Shimizu, Kikuo Umegaki
  • 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
  • Publication number: 20170042495
    Abstract: The present invention correlates information, to be processed, about an organ and/or a disease, etc., obtained from a medical image and anatomical/functional medical knowledge information, and enables the information obtained from the medial image to be effectively utilized in medical examination and treatment processes. In a medical image information system (101), an image processing unit (103) processes an image, a graph model creation unit (104) creates a graph data model from the information obtained from the image, a graph data model processing unit (106) acquires a graph data model based on anatomical/functional medical knowledge, compares with each other and integrates the graph data models and stores an integrated graph data model, and a display processing unit (110) displays the integrated graph data model, whereby the effective use of information obtained from the image is made possible.
    Type: Application
    Filed: March 30, 2015
    Publication date: February 16, 2017
    Applicant: Hitachi, Ltd.
    Inventors: Kazuki MATSUZAKI, Yuuichi MORIMOTO, Wataru TAKEUCHI, Kikuo UMEGAKI, Tohru SHIGA, Koichi YASUDA
  • 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