Patents by Inventor Akira HORIBA
Akira HORIBA 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: 11415529Abstract: The X-ray phase imaging apparatus includes an imaging system, a position switching mechanism for switching between a retracted position and an imaging position, a control unit for controlling switching between the retracted position and the imaging position, and an image processing unit for generating an X-ray phase contrast image based on the first image and the second image. The control unit is configured to control sequentially imaging at the retracted position and imaging at the imaging position.Type: GrantFiled: March 30, 2020Date of Patent: August 16, 2022Assignee: Shimadzu CorporationInventors: Takahiro Doki, Kenji Kimura, Taro Shirai, Satoshi Sano, Akira Horiba, Naoki Morimoto
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Patent number: 11385190Abstract: The X-ray phase imaging apparatus includes an imaging system, a position switching mechanism for switching between a retracted position and an imaging position, a control unit for controlling switching between the retracted position and the imaging position, and an image processing unit for generating an X-ray phase contrast image based on the first image and the second image. The control unit is configured to control sequentially imaging at the retracted position and imaging at the imaging position.Type: GrantFiled: March 30, 2020Date of Patent: July 12, 2022Assignee: Shimadzu CorporationInventors: Takahiro Doki, Kenji Kimura, Taro Shirai, Satoshi Sano, Akira Horiba, Naoki Morimoto
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Patent number: 11327029Abstract: The X-ray imaging device (100) is provided with an X-ray source (1), a plurality of gratings, a moving mechanism (8), and an image processing unit (6). The image processing unit (6) is configured to generate a phase-contrast image (16) by associating a pixel value in each pixel of a subject (T) in a plurality of subject images (10) with phase values of a Moire fringe (30) at each pixel and aligning the pixel of the subject of the same position in the plurality of subject images.Type: GrantFiled: January 22, 2019Date of Patent: May 10, 2022Assignee: Shimadzu CorporationInventors: Satoshi Sano, Koichi Tanabe, Kenji Kimura, Yukihisa Wada, Satoshi Tokuda, Taro Shirai, Takahiro Doki, Akira Horiba, Naoki Morimoto
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Patent number: 11311260Abstract: In this X-ray phase imaging apparatus, at least one of a plurality of gratings is composed of a plurality of grating portions arranged along a third direction perpendicular to a first direction along which a subject or an imaging system is moved by a moving mechanism and a second direction along which an X-ray source, a detection unit, and a plurality of grating portions are arranged. The plurality of grating portions are arranged such that adjacent grating portions overlap each other when viewed in the first direction.Type: GrantFiled: March 30, 2020Date of Patent: April 26, 2022Assignee: Shimadzu CorporationInventors: Satoshi Sano, Koichi Tanabe, Yukihisa Wada, Satoshi Tokuda, Akira Horiba, Naoki Morimoto
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Patent number: 11272894Abstract: The X-ray imaging device (100) is provided with an imaging system (CS) including an X-ray source (1), a detector (5), and a plurality of gratings, a moving mechanism (8), a position information acquisition unit (7a), and an image processing unit (6) for generating a phase-contrast image (16) in a tomographic plane by acquiring a phase distribution in a tomographic plane (40) based on a plurality of X-ray images (10) and the acquired tomographic position (z+jd).Type: GrantFiled: January 22, 2019Date of Patent: March 15, 2022Assignee: Shimadzu CorporationInventors: Satoshi Sano, Koichi Tanabe, Yukihisa Wada, Satoshi Tokuda, Akira Horiba, Naoki Morimoto
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Patent number: 11268916Abstract: This X-ray phase imaging system (100) includes an X-ray source (1), a detector (2), a first grating group (3), a second grating group (4), a moving mechanism (5), and an image processing unit (6). The moving mechanism is configured to relatively move a subject (T) and the imaging system (9) such that the subject (T) passes through a first grating region (R1) and a second grating region (R2). The image processing unit is configured to generate a first phase-contrast image (14a) and a second phase-contrast image (14b).Type: GrantFiled: July 22, 2019Date of Patent: March 8, 2022Assignee: Shimadzu CorporationInventors: Satoshi Sano, Koichi Tanabe, Yukihisa Wada, Satoshi Tokuda, Akira Horiba, Naoki Morimoto
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Publication number: 20210364453Abstract: This X-ray phase imaging system (100) includes an X-ray source (1), a detector (2), a first grating group (3), a second grating group (4), a moving mechanism (5), and an image processing unit (6). The moving mechanism is configured to relatively move a subject (T) and the imaging system (9) such that the subject (T) passes through a first grating region (R1) and a second grating region (R2). The image processing unit is configured to generate a first phase-contrast image (14a) and a second phase-contrast image (14b).Type: ApplicationFiled: July 22, 2019Publication date: November 25, 2021Inventors: Satoshi SANO, Koichi TANABE, Yukihisa WADA, Satoshi TOKUDA, Akira HORIBA, Naoki MORIMOTO
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Patent number: 11179124Abstract: An X-ray phase imaging method includes a step of correcting a gradation that occurred along an orthogonal direction to a translation direction as viewed from an optical axis direction of X-rays in a phase-contrast image based on a distribution state of the gradation.Type: GrantFiled: August 31, 2020Date of Patent: November 23, 2021Assignee: Shimadzu CorporationInventors: Satoshi Sano, Koichi Tanabe, Yukihisa Wada, Satoshi Tokuda, Akira Horiba, Naoki Morimoto
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Patent number: 11175241Abstract: This X-ray phase image capturing system (100) includes an X-ray source (1), a plurality of gratings, and a detector (4), a moving mechanism (8), and an image processing unit (5). The image processing unit (5) is configured to generate a phase-contrast image (15) based on a plurality of feature quantities (12) and feature quantities 14 extracted from a plurality of X-ray image sets (R) acquired by performing fringe scanning a plurality of times in a short time.Type: GrantFiled: November 27, 2018Date of Patent: November 16, 2021Assignee: Shimadzu CorporationInventors: Satoshi Sano, Kenji Kimura, Taro Shirai, Masanobu Sato, Takahiro Doki, Akira Horiba, Naoki Morimoto
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Patent number: 11172897Abstract: A radiation phase contrast imaging device includes an X-ray source, an X-ray detector configured to detect radiated X-rays, a plurality of gratings, an image processor configured to generate a reconstructed image from an X-ray image acquired from the X-ray detector, a display, and a controller configured or programmed to perform control to display, on the display, the X-ray image before reconstruction and the reconstructed image generated by the image processor.Type: GrantFiled: October 12, 2018Date of Patent: November 16, 2021Assignee: Shimadzu CorporationInventors: Kenji Kimura, Taro Shirai, Takahiro Doki, Satoshi Sano, Akira Horiba, Naoki Morimoto
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Patent number: 11166687Abstract: In an X-ray imaging apparatus an image processor is configured to generate a phase contrast image based on a plurality of first images acquired by a first detection region (R1) at a plurality of relative positions of the first detection region with respect to a subject (T) to be imaged, and to generate an absorption image based on a plurality of second images acquired by a second detection region (R2) at a plurality of relative positions of the second detection region with respect to the subject.Type: GrantFiled: November 8, 2018Date of Patent: November 9, 2021Assignee: Shimadzu CorporationInventors: Koichi Tanabe, Yukihisa Wada, Satoshi Tokuda, Satoshi Sano, Akira Horiba
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Patent number: 11154270Abstract: This X-ray imaging apparatus (100) includes a rotation mechanism (8) for relatively rotating an imaging system (200) constituted by an X-ray source (1), a detector (5), a first grating (2) and a second grating (3), and an image processing unit (6) for generating a dark-field image based on an X-ray intensity distribution at each of a plurality of rotation angles. The image processing unit (6) is configured to perform a scattering correction for reducing a dark-field signal of a pixel whose dark-field signal is larger than a threshold value (V1) among a plurality of pieces of pixels in the dark-field image to a set value (V2).Type: GrantFiled: November 6, 2018Date of Patent: October 26, 2021Assignee: Shimadzu CorporationInventors: Satoshi Sano, Kenji Kimura, Taro Shirai, Takahiro Doki, Akira Horiba, Naoki Morimoto
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Publication number: 20210172885Abstract: The X-ray imaging device (100) is provided with an X-ray source (1), a plurality of gratings, a moving mechanism (8), and an image processing unit (6). The image processing unit (6) is configured to generate a phase-contrast image (16) by associating a pixel value in each pixel of a subject (T) in a plurality of subject images (10) with phase values of a Moire fringe (30) at each pixel and aligning the pixel of the subject of the same position in the plurality of subject images.Type: ApplicationFiled: January 22, 2019Publication date: June 10, 2021Inventors: Satoshi SANO, Koichi TANABE, Kenji KIMURA, Yukihisa WADA, Satoshi TOKUDA, Taro SHIRAI, Takahiro DOKI, Akira HORIBA, Naoki MORIMOTO
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Publication number: 20210161492Abstract: An X-ray phase imaging method includes a step of correcting a gradation that occurred along an orthogonal direction to a translation direction as viewed from an optical axis direction of X-rays in a phase-contrast image based on a distribution state of the gradation.Type: ApplicationFiled: August 31, 2020Publication date: June 3, 2021Inventors: Satoshi SANO, Koichi TANABE, Yukihisa WADA, Satoshi TOKUDA, Akira HORIBA, Naoki MORIMOTO
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Patent number: 11013482Abstract: A phase contrast X-ray imaging system includes an X-ray source; a plurality of gratings; a detector; a grating movement mechanism; and an image processor that generates a phase contrast image. The image processor generates the phase contrast image by using a pitch of an intensity change and a function which has the pitch as a variable and expresses the intensity change in a pixel value as a grating moves.Type: GrantFiled: September 19, 2018Date of Patent: May 25, 2021Assignee: Shimadzu CorporationInventors: Naoki Morimoto, Kenji Kimura, Taro Shirai, Takahiro Doki, Satoshi Sano, Akira Horiba
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Publication number: 20210148839Abstract: This X-ray phase image capturing system (100) includes an X-ray source (1), a plurality of gratings, and a detector (4), a moving mechanism (8), and an image processing unit (5). The image processing unit (5) is configured to generate a phase-contrast image (15) based on a plurality of feature quantities (12) and feature quantities 14 extracted from a plurality of X-ray image sets (R) acquired by performing fringe scanning a plurality of times in a short time.Type: ApplicationFiled: November 27, 2018Publication date: May 20, 2021Inventors: Satoshi SANO, Kenji KIMURA, Taro SHIRAI, Masanobu SATO, Takahiro DOKI, Akira HORIBA, Naoki MORIMOTO
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Publication number: 20210137476Abstract: The X-ray imaging device (100) is provided with an imaging system (CS) including an X-ray source (1), a detector (5), and a plurality of gratings, a moving mechanism (8), a position information acquisition unit (7a), and an image processing unit (6) for generating a phase-contrast image (16) in a tomographic plane by acquiring a phase distribution in a tomographic plane (40) based on a plurality of X-ray images (10) and the acquired tomographic position (z+jd).Type: ApplicationFiled: January 22, 2019Publication date: May 13, 2021Applicant: Shimadzu CorporationInventors: Satoshi SANO, Koichi TANABE, Yukihisa WADA, Satoshi TOKUDA, Akira HORIBA, Naoki MORIMOTO
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Patent number: 10980501Abstract: The X-ray phase imaging apparatus includes a position switching mechanism for switching a relative position of one or more gratings between a retreated position which is an outside of a detection range on a detection surface of an image signal detector and a detection positon which is an inside of the detection range on the detection surface of the image signal detector and a focal diameter changing unit configured to change a focal diameter of the X-ray source in conjunction with switching of the relative position of the one or more gratings.Type: GrantFiled: April 20, 2018Date of Patent: April 20, 2021Assignee: Shimadzu CorporationInventors: Koichi Tanabe, Kenji Kimura, Toshinori Yoshimuta, Taro Shirai, Takahiro Doki, Satoshi Sano, Akira Horiba, Naoki Morimoto
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Publication number: 20210059630Abstract: This X-ray imaging apparatus (100) includes a rotation mechanism (8) for relatively rotating an imaging system (200) constituted by an X-ray source (1), a detector (5), a first grating (2) and a second grating (3), and an image processing unit (6) for generating a dark-field image based on an X-ray intensity distribution at each of a plurality of rotation angles. The image processing unit (6) is configured to perform a scattering correction for reducing a dark-field signal of a pixel whose dark-field signal is larger than a threshold value (V1) among a plurality of pieces of pixels in the dark-field image to a set value (V2).Type: ApplicationFiled: November 6, 2018Publication date: March 4, 2021Inventors: Satoshi SANO, Kenji KIMURA, Taro SHIRAI, Takahiro DOKI, Akira HORIBA, Naoki MORIMOTO
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Publication number: 20210015437Abstract: In an X-ray imaging apparatus an image processor is configured to generate a phase contrast image based on a plurality of first images acquired by a first detection region (R1) at a plurality of relative positions of the first detection region with respect to a subject (T) to be imaged, and to generate an absorption image based on a plurality of second images acquired by a second detection region (R2) at a plurality of relative positions of the second detection region with respect to the subject.Type: ApplicationFiled: November 8, 2018Publication date: January 21, 2021Applicant: Shimadzu CorporationInventors: Koichi TANABE, Yukihisa WADA, Satoshi TOKUDA, Satoshi SANO, Akira HORIBA