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).
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Patent number: 11883683Abstract: 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: GrantFiled: April 11, 2019Date of Patent: January 30, 2024Assignees: HITACHI, LTD., NATIONAL UNIVERSITY CORPORATION HOKKAIDO UNIVERSITYInventors: Yusuke Fujii, Ryuya Ando, Manabu Aoki, Kikuo Umegaki, Shinichi Shimizu, Taeko Matsuura, Hiroki Shirato
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Publication number: 20220401758Abstract: To enable an appropriate and quick detection of a change in an internal structure of a patient, a computer program causes a computer to detect a change in an internal structure of a patient. The process includes calculating a second water equivalent thickness obtained from a second three-dimensional image being a three-dimensional image of a patient, which is newly obtained; a process of calculating a change of a first water equivalent thickness from the second water equivalent thickness, the first water equivalent thickness being obtained from a first three-dimensional image being a three-dimensional image of the patient in treatment planning; and a process of calculating a dose volume histogram change for calculating a change in a dose volume histogram from the treatment plan, based on the calculated water equivalent thickness change and correlation information indicating a correlation between a water equivalent thickness change value and dose distribution information.Type: ApplicationFiled: September 18, 2020Publication date: December 22, 2022Inventors: Takaaki FUJII, Yusuke FUJII, Takahiro YAMADA, Shusuke HIRAYAMA, Seishin TAKAO, Kikuo UMEGAKI
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Patent number: 11446520Abstract: 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.Type: GrantFiled: March 12, 2018Date of Patent: September 20, 2022Assignee: National Univ. Corporation Hokkaido Univ.Inventors: Takaaki Fujii, Seishin Takao, Naoki Miyamoto, Taeko Matsuura, Kikuo Umegaki
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Patent number: 11439848Abstract: 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: GrantFiled: May 11, 2017Date of Patent: September 13, 2022Assignees: HITACHI, LTD., NATIONAL UNIVERSITY CORPORATION HOKKAIDO UNIVERSITYInventors: Yusuke Fujii, Naoki Miyamoto, Kikuo Umegaki, Shinichi Shimizu, Toru Umekawa, Takahiro Yamada
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Patent number: 11426603Abstract: 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: GrantFiled: December 19, 2016Date of Patent: August 30, 2022Assignees: HITACHI, LTD., NATIONAL UNIVERSITY CORPORATION HOKKAIDO UNIVERSITYInventors: Keiji Kobashi, Masahiro Mizuta, Hiroyuki Date, Hiroki Shirato, Shinichi Shimizu, Kikuo Umegaki, Shusuke Hirayama, Yusuke Fujii, Toru Umekawa, Rintarou Fujimoto
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Patent number: 11282244Abstract: 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: GrantFiled: February 6, 2020Date of Patent: March 22, 2022Assignees: HITACHI, LTD., NATIONAL UNIVERSITY CORPORATION HOKKAIDO UNIVERSITYInventors: Toru Umekawa, Koichi Miyazaki, Takaaki Fujii, Shinichi Shimizu, Seishin Takao, Kikuo Umegaki, Naoki Miyamoto, Norio Katoh
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Publication number: 20210268312Abstract: This radiotherapy device comprises: an X-ray irradiation device and an X-ray camera for detecting the position of a specific landmark present in an irradiation target; a storage unit which, with one from among a plurality of time-lapse three-dimensional CT images including the landmark and obtained beforehand during treatment planning used as a reference images, stores the relationship between the displacement of the landmark position from that in the reference image to that in another three-dimensional CT image, and the deformation of each of the sites in the other CT image, obtained by analysis thereof; and an image processing unit, a deformation amount evaluation unit, and a display unit, that estimate the deformation of each of the sites and reproduce the estimated three-dimensional CT image, according to the position of the landmark detected and the relationship stored by the storage unit.Type: ApplicationFiled: May 23, 2019Publication date: September 2, 2021Inventors: Naoki Miyamoto, Kikuo Umegaki, Shinichi Shimizu, Satoshi Tomioka, Seishin Takao
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Publication number: 20210154495Abstract: 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: ApplicationFiled: April 11, 2019Publication date: May 27, 2021Inventors: Yusuke FUJII, Ryuya ANDO, Manabu AOKI, Kikuo UMEGAKI, Shinichi SHIMIZU, Taeko MATSUURA, Hiroki SHIRATO
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Patent number: 10835764Abstract: 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: GrantFiled: March 23, 2017Date of Patent: November 17, 2020Assignees: HITACHI, LTD., NATIONAL UNIVERSITY CORPORATION HOKKAIDO UNIVERSITYInventors: Yusuke Fujii, Taeko Matsuura, Yuka Matsuzaki, Kikuo Umegaki, Hiroki Shirato, Hidenori Koyano, Takahiro Yamada, Rintarou Fujimoto
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Publication number: 20200311988Abstract: 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: ApplicationFiled: February 6, 2020Publication date: October 1, 2020Inventors: Toru UMEKAWA, Koichi MIYAZAKI, Takaaki FUJII, Shinichi SHIMIZU, Seishin TAKAO, Kikuo UMEGAKI, Naoki MIYAMOTO, Norio KATOH
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Patent number: 10751552Abstract: 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: GrantFiled: March 30, 2017Date of Patent: August 25, 2020Assignees: HITACHI, LTD., NATIONAL UNIVERSITY CORPORATION HOKKAIDO UNIVERSITYInventors: Takahiro Yamada, Toru Umekawa, Yusuke Fujii, Naoki Miyamoto, Kikuo Umegaki
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Publication number: 20200069968Abstract: 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: ApplicationFiled: December 19, 2016Publication date: March 5, 2020Inventors: Keiji KOBASHI, Masahiro MIZUTA, Hiroyuki DATE, Hiroki SHIRATO, Shinichi SHIMIZU, Kikuo UMEGAKI, Shusuke HIRAYAMA, Yusuke FUJII, Toru UMEKAWA, Rintarou FUJIMOTO
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Publication number: 20200054897Abstract: 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: ApplicationFiled: March 23, 2017Publication date: February 20, 2020Inventors: Yusuke FUJII, Taeko MATSUURA, Yuka MATSUZAKI, Kikuo UMEGAKI, Hiroki SHIRATO, Hidenori KOYANO, Takahiro YAMADA, Rintarou FUJIMOTO
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Publication number: 20200009404Abstract: 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: ApplicationFiled: March 12, 2018Publication date: January 9, 2020Inventors: Takaaki Fujii, Seishin Takao, Naoki Miyamoto, Taeko Matsuura, Kikuo Umegaki
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Publication number: 20190143146Abstract: 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: ApplicationFiled: May 11, 2017Publication date: May 16, 2019Applicants: HITACHI, LTD., NATIONAL UNIVERSITY CORPORATION HOKKAIDO UNIVERSITYInventors: Yusuke FUJII, Naoki MIYAMOTO, Kikuo UMEGAKI, Shinichi SHIMIZU, Toru UMEKAWA, Takahiro YAMADA
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Publication number: 20190111282Abstract: 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: ApplicationFiled: March 30, 2017Publication date: April 18, 2019Inventors: Takahiro YAMADA, Toru UMEKAWA, Yusuke FUJII, Naoki MIYAMOTO, Kikuo UMEGAKI
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Patent number: 10143436Abstract: 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: GrantFiled: October 10, 2013Date of Patent: December 4, 2018Assignee: Hitachi, Ltd.Inventors: Arao Nishimura, Koji Matsuda, Ryosuke Shinagawa, Taisuke Takayanagi, Masahiro Tadokoro, Takao Kidani, Hideaki Nihongi, Kikuo Umegaki, Taeko Matsuura
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Patent number: 10085707Abstract: 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: GrantFiled: March 30, 2015Date of Patent: October 2, 2018Assignee: Hitachi, Ltd.Inventors: Kazuki Matsuzaki, Yuuichi Morimoto, Wataru Takeuchi, Kikuo Umegaki, Tohru Shiga, Koichi Yasuda
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Patent number: 9899112Abstract: 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: GrantFiled: February 21, 2017Date of Patent: February 20, 2018Assignees: Hitachi, Ltd., National University Corporation Hokkaido UniversityInventors: Taisuke Takayanagi, Shinichiro Fujitaka, Chihiro Nakashima, Tomoki Murata, Taeko Matsuura, Naoki Miyamoto, Kikuo Umegaki, Yuichi Hirata
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Patent number: 9757590Abstract: 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: GrantFiled: October 27, 2014Date of Patent: September 12, 2017Assignees: Hitachi, Ltd., National University Corporation Hokkaido UniversityInventors: Kazuo Hiramoto, Masumi Umezawa, Shinichiro Fujitaka, Hiroki Shirato, Shinichi Shimizu, Kikuo Umegaki