Patents by Inventor Takashi Takasaki
Takashi Takasaki 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: 20240053497Abstract: A radiation imaging apparatus includes a pixel array having a plurality of pixels configured to detect radiation, and a controller configured to obtain a radiation generation condition related to a radiation generating apparatus during fluoroscopic imaging, and determine, during the fluoroscopic imaging, timings of a plurality of sampling and holding operations in each of the plurality of pixels in accordance with the radiation generation condition. The timing of at least one sampling and holding operation is a timing in an irradiation period of radiation, and each of the plurality of pixels includes a conversion element configured to convert radiation into an electrical signal, and a sample and hold circuit configured to sample and hold signals from the conversion element multiple times in accordance with the timings, determined by the controller, of the plurality of sampling and holding operations.Type: ApplicationFiled: August 4, 2023Publication date: February 15, 2024Inventors: TAKASHI TAKASAKI, ATSUSHI IWASHITA, KOSUKE TERUI, RYUICHI FUJIMOTO, TAKESHI NODA
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Publication number: 20230204522Abstract: A radiation imaging apparatus includes a detection unit configured to detect radiation emitted from a radiation irradiation unit, the apparatus comprises a processing unit configured to obtain dose distribution information regarding the radiation with which the detection unit is irradiated from the radiation irradiation unit. The processing unit corrects, using the dose distribution information, an image signal output from the detection unit.Type: ApplicationFiled: November 3, 2022Publication date: June 29, 2023Inventors: Takashi Takasaki, Toshiharu Sumiya, Akiya Nakayama, Ritsuya Tomita
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Patent number: 11638565Abstract: A radiographic imaging apparatus includes: an effective pixel area including a plurality of detection areas, in each of which a first pixel including a photoelectric conversion element and a second pixel including a light-blocking element are provided; a plurality of signal processing units that are provided so as to correspond to the plurality of detection areas and each process, for a corresponding one of the detection areas, an output signal from the first pixel and an output signal from the second pixel provided in the corresponding one of the detection areas; and a correction unit that makes, for each signal processing unit among the plurality of signal processing units, a correction to the output signal from the first pixel processed by the signal processing unit, by using the output signal from the second pixel processed by the signal processing unit.Type: GrantFiled: November 3, 2020Date of Patent: May 2, 2023Assignee: CANON KABUSHIKI KAISHAInventor: Takashi Takasaki
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Publication number: 20220237775Abstract: A radiographic imaging system including a radiographic imaging apparatus having a pixel array including a dose detection region where dose detection pixels for outputting signals to be used to detect a dose of emitted radiation is provided, based on position information regarding positions in the dose detection region of defective pixels among the dose detection pixels, determines whether radiographic imaging involving the detection of the dose of the radiation can be normally performed.Type: ApplicationFiled: January 21, 2022Publication date: July 28, 2022Inventor: Takashi Takasaki
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Patent number: 11125702Abstract: An image processing apparatus that processes an image obtained from an imaging sensor having a plurality of pixels arranged in a matrix pattern, the pixels including a first pixel group for obtaining a pixel value corresponding to a radiation dose and a second pixel group for obtaining an offset value even with irradiation with radiation, performs offset correction of a radiation image obtained from the plurality of pixels by an imaging operation with irradiation with radiation based on a dark image obtained from the plurality of pixels by an imaging operation without irradiation with radiation, calculates a statistic value of pixel values obtained from the second pixel group of the corrected radiation image, and corrects pixel values obtained from the first pixel group, which have been offset-corrected, based on a temporal variation in the statistic value.Type: GrantFiled: March 5, 2020Date of Patent: September 21, 2021Assignee: CANON KABUSHIKI KAISHAInventors: Shinsuke Hayashida, Takashi Takasaki
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Publication number: 20210068774Abstract: A radiographic imaging apparatus includes: an effective pixel area including a plurality of detection areas, in each of which a first pixel including a photoelectric conversion element and a second pixel including a light-blocking element are provided; a plurality of signal processing units that are provided so as to correspond to the plurality of detection areas and each process, for a corresponding one of the detection areas, an output signal from the first pixel and an output signal from the second pixel provided in the corresponding one of the detection areas; and a correction unit that makes, for each signal processing unit among the plurality of signal processing units, a correction to the output signal from the first pixel processed by the signal processing unit, by using the output signal from the second pixel processed by the signal processing unit.Type: ApplicationFiled: November 3, 2020Publication date: March 11, 2021Inventor: Takashi Takasaki
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Publication number: 20200292474Abstract: An image processing apparatus that processes an image obtained from an imaging sensor having a plurality of pixels arranged in a matrix pattern, the pixels including a first pixel group for obtaining a pixel value corresponding to a radiation dose and a second pixel group for obtaining an offset value even with irradiation with radiation, performs offset correction of a radiation image obtained from the plurality of pixels by an imaging operation with irradiation with radiation based on a dark image obtained from the plurality of pixels by an imaging operation without irradiation with radiation, calculates a statistic value of pixel values obtained from the second pixel group of the corrected radiation image, and corrects pixel values obtained from the first pixel group, which have been offset-corrected, based on a temporal variation in the statistic value.Type: ApplicationFiled: March 5, 2020Publication date: September 17, 2020Inventors: Shinsuke Hayashida, Takashi Takasaki
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Patent number: 9846245Abstract: A radiographic image capturing apparatus includes: a pixel array in which a plurality of pixels outputting an electrical signal corresponding to radiation are arranged; a readout circuit section; and a member for preventing radiation from entering the readout circuit section. The pixel array includes a first region in which some pixels used for generating image signals are arranged, and a second region in which other pixels not used for generating the image signals are arranged in at least part of a region around the first region. From an outer side toward an inner side of the pixel array, an end on the inner side of the readout circuit section disposed in the second region, an end on the inner side of an orthogonal projection of the member to the pixel array, and an end on the inner side of the second region are arranged in this order.Type: GrantFiled: October 30, 2014Date of Patent: December 19, 2017Assignee: Canon Kabushiki KaishaInventors: Katsuro Takenaka, Toshio Kameshima, Tomoyuki Yagi, Atsushi Iwashita, Eriko Sato, Hideyuki Okada, Takuya Ryu, Kosuke Terui, Takashi Takasaki
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Patent number: 9820712Abstract: An energy control unit continuously adjusts energy of radiations in one shot emitted by an X-ray irradiation unit. An X-ray detection unit generates a plurality of image data pieces in one shot by detecting the radiations whose energy is continuously adjusted and transmitted through a subject. An image classification unit classifies the plurality of image data pieces generated by the X-ray detection unit into image data generated by the radiations of a high energy side and image data generated by the radiations of a low energy side. An image subtraction unit performs weighting and subtraction on the image data generated by the radiations of the high energy side and the image data generated by the radiations of the low energy side.Type: GrantFiled: September 13, 2016Date of Patent: November 21, 2017Assignee: Canon Kabushiki KaishaInventor: Takashi Takasaki
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Publication number: 20170000439Abstract: An energy control unit continuously adjusts energy of radiations in one shot emitted by an X-ray irradiation unit. An X-ray detection unit generates a plurality of image data pieces in one shot by detecting the radiations whose energy is continuously adjusted and transmitted through a subject. An image classification unit classifies the plurality of image data pieces generated by the X-ray detection unit into image data generated by the radiations of a high energy side and image data generated by the radiations of a low energy side. An image subtraction unit performs weighting and subtraction on the image data generated by the radiations of the high energy side and the image data generated by the radiations of the low energy side.Type: ApplicationFiled: September 13, 2016Publication date: January 5, 2017Inventor: Takashi Takasaki
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Patent number: 9492134Abstract: An energy control unit continuously adjusts energy of radiations in one shot emitted by an X-ray irradiation unit. An X-ray detection unit generates a plurality of image data pieces in one shot by detecting the radiations whose energy is continuously adjusted and transmitted through a subject. An image classification unit classifies the plurality of image data pieces generated by the X-ray detection unit into image data generated by the radiations of a high energy side and image data generated by the radiations of a low energy side. An image subtraction unit performs weighting and subtraction on the image data generated by the radiations of the high energy side and the image data generated by the radiations of the low energy side.Type: GrantFiled: January 25, 2011Date of Patent: November 15, 2016Assignee: Canon Kabushiki KaishaInventor: Takashi Takasaki
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Publication number: 20160291170Abstract: A radiographic image capturing apparatus includes: a pixel array in which a plurality of pixels outputting an electrical signal corresponding to radiation are arranged; a readout circuit section; and a member for preventing radiation from entering the readout circuit section. The pixel array includes a first region in which some pixels used for generating image signals are arranged, and a second region in which other pixels not used for generating the image signals are arranged in at least part of a region around the first region. From an outer side toward an inner side of the pixel array, an end on the inner side of the readout circuit section disposed in the second region, an end on the inner side of an orthogonal projection of the member to the pixel array, and an end on the inner side of the second region are arranged in this order.Type: ApplicationFiled: October 30, 2014Publication date: October 6, 2016Inventors: Katsuro Takenaka, Toshio Kameshima, Tomoyuki Yagi, Atsushi Iwashita, Eriko Sato, Hideyuki Okada, Takuya Ryu, Kosuke Terui, Takashi Takasaki
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Patent number: 9453924Abstract: A radiation control apparatus includes a determination unit configured to determine dose values of exposures to a radiation detector for acquiring correction images, corresponding to measured input-output characteristics of the radiation detector, and a acquisition unit configured to acquire correction data for the input-output characteristics of the radiation detector, based on the correction images acquired from the detector exposed at the determined dose values.Type: GrantFiled: July 20, 2012Date of Patent: September 27, 2016Assignee: Canon Kabushiki KaishaInventor: Takashi Takasaki
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Patent number: 8503607Abstract: An X-ray imaging apparatus suppresses X-ray irradiation outside an X-ray detection unit. An X-ray imaging apparatus according to this invention includes an X-ray irradiation unit which irradiates an object with X-rays, an X-ray detection unit movably provided with an imaging unit, a first irradiation field prediction unit which calculates an irradiation field by using the relative positional relationship between generation unit and imaging unit and aperture value of a collimator, a second irradiation field prediction unit which calculates an irradiation field based on the dose of X-rays generated by the generation unit and the X-ray dose distribution detected by the imaging unit, and a predicted irradiation field decision unit which decides, as a predicted irradiation field, a region including one or both of irradiation fields respectively calculated by the first and second irradiation field prediction units.Type: GrantFiled: May 8, 2012Date of Patent: August 6, 2013Assignee: Canon Kabushiki KaishaInventor: Takashi Takasaki
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Publication number: 20130020478Abstract: A radiation control apparatus includes a determination unit configured to determine dose values of exposures to a radiation detector for acquiring correction images, corresponding to measured input-output characteristics of the radiation detector, and a acquisition unit configured to acquire correction data for the input-output characteristics of the radiation detector, based on the correction images acquired from the detector exposed at the determined dose values.Type: ApplicationFiled: July 20, 2012Publication date: January 24, 2013Applicant: CANON KABUSHIKI KAISHAInventor: Takashi Takasaki
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Publication number: 20120288062Abstract: An energy control unit continuously adjusts energy of radiations in one shot emitted by an X-ray irradiation unit. An X-ray detection unit generates a plurality of image data pieces in one shot by detecting the radiations whose energy is continuously adjusted and transmitted through a subject. An image classification unit classifies the plurality of image data pieces generated by the X-ray detection unit into image data generated by the radiations of a high energy side and image data generated by the radiations of a low energy side. An image subtraction unit performs weighting and subtraction on the image data generated by the radiations of the high energy side and the image data generated by the radiations of the low energy side.Type: ApplicationFiled: January 25, 2011Publication date: November 15, 2012Applicant: CANON KABUSHIKI KAISHAInventor: Takashi Takasaki
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Publication number: 20120219117Abstract: An X-ray imaging apparatus suppresses X-ray irradiation outside an X-ray detection unit. An X-ray imaging apparatus according to this invention includes an X-ray irradiation unit which irradiates an object with X-rays, an X-ray detection unit movably provided with an imaging unit, a first irradiation field prediction unit which calculates an irradiation field by using the relative positional relationship between generation unit and imaging unit and aperture value of a collimator, a second irradiation field prediction unit which calculates an irradiation field based on the dose of X-rays generated by the generation unit and the X-ray dose distribution detected by the imaging unit, and a predicted irradiation field decision unit which decides, as a predicted irradiation field, a region including one or both of irradiation fields respectively calculated by the first and second irradiation field prediction units.Type: ApplicationFiled: May 8, 2012Publication date: August 30, 2012Applicant: CANON KABUSHIKI KAISHAInventor: Takashi Takasaki
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Patent number: 8197137Abstract: An X-ray imaging apparatus suppresses X-ray irradiation outside an X-ray detection unit. An X-ray imaging apparatus according to this invention includes an X-ray irradiation unit which irradiates an object with X-rays, an X-ray detection unit movably provided with an imaging unit, a first irradiation field prediction unit which calculates an irradiation field by using the relative positional relationship between generation unit and imaging unit and aperture value of a collimator, a second irradiation field prediction unit which calculates an irradiation field based on the dose of X-rays generated by the generation unit and the X-ray dose distribution detected by the imaging unit, and a predicted irradiation field decision unit which decides, as a predicted irradiation field, a region including one or both of irradiation fields respectively calculated by the first and second irradiation field prediction units.Type: GrantFiled: April 8, 2010Date of Patent: June 12, 2012Assignee: Canon Kabushiki KaishaInventor: Takashi Takasaki
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Publication number: 20100266098Abstract: An X-ray imaging apparatus suppresses X-ray irradiation outside an X-ray detection unit. An X-ray imaging apparatus according to this invention includes an X-ray irradiation unit which irradiates an object with X-rays, an X-ray detection unit movably provided with an imaging unit, a first irradiation field prediction unit which calculates an irradiation field by using the relative positional relationship between generation unit and imaging unit and aperture value of a collimator, a second irradiation field prediction unit which calculates an irradiation field based on the dose of X-rays generated by the generation unit and the X-ray dose distribution detected by the imaging unit, and a predicted irradiation field decision unit which decides, as a predicted irradiation field, a region including one or both of irradiation fields respectively calculated by the first and second irradiation field prediction units.Type: ApplicationFiled: April 8, 2010Publication date: October 21, 2010Applicant: CANON KABUSHIKI KAISHAInventor: Takashi Takasaki
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Patent number: 4986999Abstract: An anti-denaturation agent for an edible paste product contains a protein decomposition extract obtained by decomposition of protein by proteinase and saccharides as essential active ingredients.Type: GrantFiled: July 18, 1988Date of Patent: January 22, 1991Assignee: Nihon Bussan Kabushiki KaishaInventors: Takashi Takasaki, Reikichi Yanai, Shigeru Amakawa, Yoichi Takizawa, Akira Iwamoto