Patents by Inventor Yasuto Hayatsu
Yasuto Hayatsu 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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Publication number: 20240081770Abstract: A medical image processing apparatus according to an embodiment includes processing circuitry. The processing circuitry acquires a plurality of projection data based on an output signal from an X-ray detector that rotates around a subject, performs reconstruction filter processing on the plurality of acquired projection data, the reconstruction filter processing being included in reconstruction regarding the plurality of projection data, generates correction information on a sensitivity difference area formed in the plurality of projection data due to differences in sensitivity of the X-ray detector, on the basis of a processing result of the reconstruction filter processing, performs correction processing on the plurality of projection data on the basis of the correction information, and performs reconstruction processing including the reconstruction filter processing on the plurality of projection data subjected to the correction processing.Type: ApplicationFiled: September 1, 2023Publication date: March 14, 2024Applicant: CANON MEDICAL SYSTEMS CORPORATIONInventors: Jumpei OGASAWARA, Hajime YOSHIDA, Yasuto HAYATSU, Kunio SHIRAISHI
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Publication number: 20230351647Abstract: According to one embodiment, an X-ray diagnostic apparatus including processing circuitry. The processing circuitry is configured to cause an X-ray detector to read a signal in a non-destructive readout before termination of X-ray exposure, the signal being accumulated in an X-ray detection element; cause the X-ray detector to read the signal in a destructive readout after termination of X-ray exposure; acquire first projection data generated based on the signal read in the non-destructive readout and acquire second projection data generated based on the signal read in the destructive readout; estimate, based on the second projection data, a saturation region in which saturation is occurring; and replace a signal in the saturation region of the second projection data with a signal in the saturation region of the first projection data.Type: ApplicationFiled: March 28, 2023Publication date: November 2, 2023Applicant: Canon Medical Systems CorporationInventors: Jumpei OGASAWARA, Kunio SHIRAISHI, Hajime YOSHIDA, Akihito TAKAHASHI, Yasuto HAYATSU
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Patent number: 10762634Abstract: According to one embodiment, an image processing device includes processing circuitry. The processing circuitry sequentially acquires image data of time-sequential DSA images of an object, and acquires a parameter value for each pixel based on temporal change of a pixel value of the each pixel corresponding to the same region of the object in the sequentially acquired image data of time-sequential DSA images. Further, the processing circuitry sequentially generates image data of parameter images in such a manner that identification information according to the parameter value is assigned to the each pixel corresponding to the same region of the object, each time image data of a DSA image of the latest time phase being acquired.Type: GrantFiled: August 27, 2015Date of Patent: September 1, 2020Assignee: Canon Medical Systems CorporationInventors: Ryoichi Nagae, Yasuto Hayatsu, Yoshiaki Iijima, Naoki Uchida, Yoshinori Shimizu, Yuichiro Watanabe, Takuya Sakaguchi
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Patent number: 10485500Abstract: An X-ray diagnostic apparatus of an embodiment includes processing circuitry. The processing circuitry acquires two medical images, a moving distance of a region of interest between the medical images corresponding to a distance derived from a parallax angle. The processing circuitry causes a display to display a stereoscopic image based on the medical images.Type: GrantFiled: April 6, 2017Date of Patent: November 26, 2019Assignee: Canon Medical Systems CorporationInventors: Ryoichi Nagae, Yasuto Hayatsu, Yoshiaki Iijima, Takuya Sakaguchi, Yuichiro Watanabe
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Patent number: 10307125Abstract: According to one embodiment, an image processing apparatus includes processing circuitry. The processing circuitry obtains a parameter value representing temporal information on blood flow for each pixel of multiple image data items, and generates a parameter image by determining a pixel value of each pixel according to the parameter value representing the temporal information on blood flow. The processing circuitry further generates a composite image of an X-ray fluoroscopic image of an object obtained in real time and a road map image using at least a part of the parameter image, and causes a display to display the composite image.Type: GrantFiled: April 15, 2016Date of Patent: June 4, 2019Assignee: Toshiba Medical Systems CorporationInventors: Ryoichi Nagae, Yasuto Hayatsu, Yoshiaki Iijima, Naoki Uchida, Yuichiro Watanabe, Takuya Sakaguchi
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Patent number: 10278667Abstract: An X-ray diagnostic apparatus of an embodiment includes an image generator, a detection unit, and an irradiation control unit. The image generator successively generates X-ray images based on X-rays emitted from an X-ray tube and transmitted through a subject. The detection unit detects a position of a predetermined target included in the successively generated X-ray images. The irradiation control unit identifies, based on the detected position of the predetermined target, a region in which the predetermined target can be visualized in the X-ray images, and performs control to reduce an X-ray irradiation dose to a region other than the identified region.Type: GrantFiled: July 22, 2015Date of Patent: May 7, 2019Assignee: Toshiba Medical Systems CorporationInventors: Yoshiaki Iijima, Ryoichi Nagae, Yasuto Hayatsu, Kunio Shiraishi, Yoshinori Shimizu, Yuichiro Watanabe
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Patent number: 10271804Abstract: According to one embodiment, the X-ray image diagnosis apparatus comprises an X-ray generator, an X-ray restriction unit, a first X-ray detector, a second X-ray detector, and a drive. The X-ray generator generates X-rays to be applied to a subject. The X-ray restriction unit is disposed between the subject and the X-ray generator to restrict X-rays outside an opening region which is formed using a metal plate. The first X-ray detector has a first detection region in which X-rays that pass through the subject are detected. The second X-ray detector has a second detection region which is smaller than the first detection region and which has a high spatial resolution. The drive moves the first and second X-ray detectors so that the second detection region includes an irradiation region of the subject formed by the opening region.Type: GrantFiled: August 1, 2016Date of Patent: April 30, 2019Assignee: Toshiba Medical Systems CorporationInventors: Nobuhiro Ohga, Jun Okada, Satoru Esashi, Toshio Muroi, Nobuo Ogura, Masanori Gunji, Yasuto Hayatsu, Ryoichi Nagae, Yoshiaki Iijima
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Patent number: 9801602Abstract: In an X-ray diagnostic apparatus of one embodiment, an image data generator sequentially generates X-ray images based on X-rays transmitted through a subject. An image processor executes: first processing where, in response to an instruction to start correction processing, a position of a target contained in a predetermined X-ray image is obtained as a reference position; and second processing where corrected images in which positions of the target are set at the reference position are sequentially generated from newly generated X-ray images. An image data storage unit stores therein information on a reference position with respect to each set of conditions of manipulation on the subject. Upon receiving the instruction to start correction processing, the image processor executes the second processing by using information on the reference position stored in the image data storage unit, in accordance with a set of the conditions of manipulation on the subject.Type: GrantFiled: July 27, 2015Date of Patent: October 31, 2017Assignee: Toshiba Medical Systems CorporationInventors: Ryoichi Nagae, Yasuto Hayatsu, Yoshiaki Iijima, Kunio Shiraishi, Yoshinori Shimizu, Yuichiro Watanabe
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Publication number: 20170290556Abstract: An X-ray diagnostic apparatus of an embodiment includes processing circuitry. The processing circuitry acquires two medical images, a moving distance of a region of interest between the medical images corresponding to a distance derived from a parallax angle. The processing circuitry causes a display to display a stereoscopic image based on the medical images.Type: ApplicationFiled: April 6, 2017Publication date: October 12, 2017Applicant: Toshiba Medical Systems CorporationInventors: Ryoichi Nagae, Yasuto Hayatsu, Yoshiaki Iijima, Takuya Sakaguchi, Yuichiro Watanabe
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Patent number: 9681849Abstract: According to one embodiment, an X-ray diagnostic apparatus includes an input circuit, an X-ray tube and an X-ray detector, and processing circuitry. The input circuit converts an input operation into an electric signal and output the electric signal. The X-ray tube and the X-ray detector image X-ray images of an object. The processing circuitry detects positions of feature points of devices from the X-ray images; generates corrected images by motion correction of the X-ray images when an electric signal corresponding to an input operation for selecting a predetermined device has been input from the input circuit; and displays the corrected images as the moving image in real time. The motion correction is performed based on positions of a feature point of the selected device. At least a part of the selected device nearly stops when the X-ray images have been displayed, by the motion correction.Type: GrantFiled: June 17, 2015Date of Patent: June 20, 2017Assignee: Toshiba Medical Systems CorporationInventors: Yoshinori Shimizu, Yuichiro Watanabe, Yasuto Hayatsu, Ryoichi Nagae, Yoshiaki Iijima, Kunio Shiraishi
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Publication number: 20170112456Abstract: According to one embodiment, the X-ray image diagnosis apparatus comprises an X-ray generator, an X-ray restriction unit, a first X-ray detector, a second X-ray detector, and a drive. The X-ray generator generates X-rays to be applied to a subject. The X-ray restriction unit is disposed between the subject and the X-ray generator to restrict X-rays outside an opening region which is formed using a metal plate. The first X-ray detector has a first detection region in which X-rays that pass through the subject are detected. The second X-ray detector has a second detection region which is smaller than the first detection region and which has a high spatial resolution. The drive moves the first and second X-ray detectors so that the second detection region includes an irradiation region of the subject formed by the opening region.Type: ApplicationFiled: August 1, 2016Publication date: April 27, 2017Applicant: Toshiba Medical Systems CorporationInventors: Nobuhiro OHGA, Jun OKADA, Satoru ESASHI, Toshio MUROI, Nobuo OGURA, Masanori GUNJI, Yasuto HAYATSU, Ryoichi NAGAE, Yoshiaki llJIMA
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Publication number: 20160350913Abstract: According to one embodiment, an image processing apparatus includes processing circuitry. The processing circuitry obtains a parameter value representing temporal information on blood flow for each pixel of multiple image data items, and generates a parameter image by determining a pixel value of each pixel according to the parameter value representing the temporal information on blood flow. The processing circuitry further generates a composite image of an X-ray fluoroscopic image of an object obtained in real time and a road map image using at least a part of the parameter image, and causes a display to display the composite image.Type: ApplicationFiled: April 15, 2016Publication date: December 1, 2016Applicant: TOSHIBA MEDICAL SYSTEMS CORPORATIONInventors: Ryoichi NAGAE, Yasuto HAYATSU, Yoshiaki llJIMA, Naoki UCHIDA, Yuichiro WATANABE, Takuya SAKAGUCHI
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Publication number: 20160078621Abstract: According to one embodiment, an image processing device includes processing circuitry. The processing circuitry sequentially acquires image data of time-sequential DSA images of an object, and acquires a parameter value for each pixel based on temporal change of a pixel value of the each pixel corresponding to the same region of the object in the sequentially acquired image data of time-sequential DSA images. Further, the processing circuitry sequentially generates image data of parameter images in such a manner that identification information according to the parameter value is assigned to the each pixel corresponding to the same region of the object, each time image data of a DSA image of the latest time phase being acquired.Type: ApplicationFiled: August 27, 2015Publication date: March 17, 2016Applicants: Kabushiki Kaisha Toshiba, Toshiba Medical Systems CorporationInventors: Ryoichi NAGAE, Yasuto HAYATSU, Yoshiaki llJIMA, Naoki UCHIDA, Yoshinori SHIMIZU, Yuichiro WATANABE, Takuya SAKAGUCHI
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Publication number: 20160029992Abstract: An X-ray diagnostic apparatus of an embodiment includes an image generator, a detection unit, and an irradiation control unit. The image generator successively generates X-ray images based on X-rays emitted from an X-ray tube and transmitted through a subject. The detection unit detects a position of a predetermined target included in the successively generated X-ray images. The irradiation control unit identifies, based on the detected position of the predetermined target, a region in which the predetermined target can be visualized in the X-ray images, and performs control to reduce an X-ray irradiation dose to a region other than the identified region.Type: ApplicationFiled: July 22, 2015Publication date: February 4, 2016Applicants: Kabushiki Kaisha Toshiba, Toshiba Medical Systems CorporationInventors: Yoshiaki IIJIMA, Ryoichi NAGAE, Yasuto HAYATSU, Kunio SHIRAISHI, Yoshinori SHIMIZU, Yuichiro WATANABE
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Publication number: 20160029989Abstract: In an X-ray diagnostic apparatus of one embodiment, an image data generator sequentially generates X-ray images based on X-rays transmitted through a subject. An image processor executes: first processing where, in response to an instruction to start correction processing, a position of a target contained in a predetermined X-ray image is obtained as a reference position; and second processing where corrected images in which positions of the target are set at the reference position are sequentially generated from newly generated X-ray images. An image data storage unit stores therein information on a reference position with respect to each set of conditions of manipulation on the subject. Upon receiving the instruction to start correction processing, the image processor executes the second processing by using information on the reference position stored in the image data storage unit, in accordance with a set of the conditions of manipulation on the subject.Type: ApplicationFiled: July 27, 2015Publication date: February 4, 2016Applicants: Kabushiki Kaisha Toshiba, Toshiba Medical Systems CorporationInventors: Ryoichi NAGAE, Yasuto Hayatsu, Yoshiaki Iijima, Kunio Shiraishi, Yoshinori Shimizu, Yuichiro Watanabe
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Publication number: 20150366529Abstract: According to one embodiment, an X-ray diagnostic apparatus includes an input circuit, an X-ray tube and an X-ray detector, and processing circuitry. The input circuit converts an input operation into an electric signal and output the electric signal. The X-ray tube and the X-ray detector image X-ray images of an object. The processing circuitry detects positions of feature points of devices from the X-ray images; generates corrected images by motion correction of the X-ray images when an electric signal corresponding to an input operation for selecting a predetermined device has been input from the input circuit; and displays the corrected images as the moving image in real time. The motion correction is performed based on positions of a feature point of the selected device. At least a part of the selected device nearly stops when the X-ray images have been displayed, by the motion correction.Type: ApplicationFiled: June 17, 2015Publication date: December 24, 2015Applicants: Kabushiki Kaisha Toshiba, Toshiba Medical Systems CorporationInventors: Yoshinori SHIMIZU, Yuichiro WATANABE, Yasuto HAYATSU, Ryoichi NAGAE, Yoshiaki llJIMA, Kunio SHIRAISHI
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Publication number: 20070136101Abstract: Instructions are issued for transfer or recording of medical images to other devices on a network or recording to media such as movable storage media, the historical information regarding the transfer or recording corresponding to the instructional content of a transfer or recording is attached, and the medical image with historical information attached is transferred to other media. Therefore, in the event that a medical image is leaked, the route of leakage may be identified easily by analyzing the historical information of the leaked medical image, and prompt handling including setting up recurrence prevention measures can be determined.Type: ApplicationFiled: November 22, 2006Publication date: June 14, 2007Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA MEDICAL SYSTEMS CORPORATIONInventor: Yasuto Hayatsu