Patents by Inventor Osamu Tsujii

Osamu Tsujii 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: 20120314837
    Abstract: A radiation transmission type target to be used for a radiation tube has a target metal 12 placed on a substrate 13, and has an antistatic member 14 placed on a surface of the substrate 13 opposite to a surface on which the target metal 12 is placed. The target suppresses its electrostatic charge, and enables the radiation tube to stable operate.
    Type: Application
    Filed: May 11, 2012
    Publication date: December 13, 2012
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Osamu Tsujii, Noriaki Oguri, Takashi Ogura
  • Publication number: 20120277581
    Abstract: An X-ray moving image radiographing apparatus includes an X-ray detector configured to detect an X-ray transmitting through a subject to acquire a subject image, an image processing unit configured to process an X-ray radiographic image output from the X-ray detector, and a control unit configured to capture a mask image by selectively scanning X-ray focal positions of an X-ray source which has a plurality of X-ray focal points so that an X-ray incident angle varies with respect to a target point of the subject, and to capture a moving image after a predetermined work is performed on the subject by selectively scanning X-ray focal positions of the X-ray source similar to the scanning operation used to capture the mask image.
    Type: Application
    Filed: July 5, 2012
    Publication date: November 1, 2012
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Hiroyuki Urushiya, Osamu Tsujii
  • Patent number: 8297839
    Abstract: A radiation imaging apparatus includes a C-arm, a radiation source configured to irradiate a subject with radiation, and a two-dimensional detection device configured to detect the radiation having passed through the subject. The radiation source and the two-dimensional detection device are arranged to face each other across the C-arm, and at least one of the radiation source and the two-dimensional detection device is attached to the C-arm via a sub-arm that is rotatably connected to a frame of the C-arm.
    Type: Grant
    Filed: May 28, 2010
    Date of Patent: October 30, 2012
    Assignee: Canon Kabushiki Kaisha
    Inventors: Osamu Tsujii, Hiroyuki Ichiyoshi
  • Patent number: 8290118
    Abstract: An X-ray imaging apparatus includes an X-ray source including a plurality of X-ray focuses, an X-ray detector which detects X-rays emitted from the X-ray focuses and transmitted through an object, and a control unit which controls the X-ray source and the X-ray detector. The X-ray imaging apparatus selects a pair of X-ray focuses, of X-ray focuses of the plurality of X-ray focuses which project images on the X-ray detector through a region of interest which is an imaging region of the object, from which emitted X-rays define an intersecting angle coinciding with a predetermined angle in the region of interest, and decides an X-ray focus to be used for imaging from X-ray focuses between the selected pair of X-ray focuses. An X-ray image is captured by emitting X-rays from the decided X-ray focus and causing the X-ray detector to detect the X-rays.
    Type: Grant
    Filed: April 8, 2011
    Date of Patent: October 16, 2012
    Assignee: Canon Kabushiki Kaisha
    Inventor: Osamu Tsujii
  • Patent number: 8285023
    Abstract: A radiation image processing apparatus which processes non-spiral projection data obtained by radiation imaging performed by rotating a radiation generator and a two-dimensional radiation detector relative to a subject reconstructs the non-spiral projection data into first volume data subjected to an averaging process in a direction of a rotation axis of the rotation and second volume data not subjected to the averaging process. The radiation image processing apparatus performs planar reconstruction calculation using the first volume data to generate a cross section image in a first plane perpendicular to the direction of the rotation axis and performs planar reconstruction calculation using the second volume data to generate a cross section image in a second plane parallel to the direction of the rotation axis. The resulting cross section images are displayed on a display apparatus.
    Type: Grant
    Filed: August 29, 2008
    Date of Patent: October 9, 2012
    Assignee: Canon Kabushiki Kaisha
    Inventors: Osamu Tsujii, Yuichi Nishii, Hiroyuki Urushiya, Kazuhiro Matsumoto, Hiroyuki Shinbata
  • Patent number: 8249216
    Abstract: An X-ray moving image radiographing apparatus includes an X-ray detector configured to detect an X-ray transmitting through a subject to acquire a subject image, an image processing unit configured to process an X-ray radiographic image output from the X-ray detector, and a control unit configured to capture a mask image by selectively scanning X-ray focal positions of an X-ray source which has a plurality of X-ray focal points so that an X-ray incident angle varies with respect to a target point of the subject, and to capture a moving image after a predetermined work is performed on the subject by selectively scanning X-ray focal positions of the X-ray source similar to the scanning operation used to capture the mask image.
    Type: Grant
    Filed: April 9, 2009
    Date of Patent: August 21, 2012
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hiroyuki Urushiya, Osamu Tsujii
  • Publication number: 20120163533
    Abstract: A radiation imaging apparatus that captures radiographic images includes a radioactive ray generating unit configured to irradiate a subject with a plurality of radioactive rays generated by a plurality of electron sources. A radioactive ray detection unit captures a plurality of first radiographic images based on detection of the plurality of radioactive rays that have passed through the subject at different irradiation angles. Area specification unit specifies an object area using the plurality of first radiographic images captured by the radioactive ray detection unit, and a determination unit determines an electron source to be driven from the plurality of electron sources based on the object area specified by the area specification unit, such that a second radiographic image is captured based on the radioactive rays generated by the electron source determined by the determination unit.
    Type: Application
    Filed: March 2, 2012
    Publication date: June 28, 2012
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Takashi Ogura, Osamu Tsujii
  • Publication number: 20120140895
    Abstract: A compact apparatus can form multi-X-ray beams with good controllability. Electron beams (e) emitted from electron emission elements (15) of a multi-electron beam generating unit (12) receive the lens effect of a lens electrode (19). The resultant electron beams are accelerated to the final potential level by portions of a transmission-type target portion (13) of an anode electrode (20). The multi-X-ray beams (x) generated by the transmission-type target portion (13) pass through an X-ray shielding plate (23) and X-ray extraction portions (24) in a vacuum chamber and are extracted from the X-ray extraction windows (27) of a wall portion (25) into the atmosphere.
    Type: Application
    Filed: February 10, 2012
    Publication date: June 7, 2012
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Masahiko Okunuki, Osamu Tsujii, Takeo Tsukamoto
  • Patent number: 8149987
    Abstract: A radiation imaging apparatus that captures radiographic images includes a radioactive ray generating unit configured to irradiate a subject with a plurality of radioactive rays generated by a plurality of electron sources. A radioactive ray detection unit captures a plurality of first radiographic images based on detection of the plurality of radioactive rays that have passed through the subject at different irradiation angles. Area specification unit specifies an object area using the plurality of first radiographic images captured by the radioactive ray detection unit, and a determination unit determines an electron source to be driven from the plurality of electron sources based on the object area specified by the area specification unit, such that a second radiographic image is captured based on the radioactive rays generated by the electron source determined by the determination unit.
    Type: Grant
    Filed: March 29, 2010
    Date of Patent: April 3, 2012
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takashi Ogura, Osamu Tsujii
  • Patent number: 8139716
    Abstract: A compact apparatus can form multi-X-ray beams with good controllability. Electron beams (e) emitted from electron emission elements (15) of a multi-electron beam generating unit (12) receive the lens effect of a lens electrode (19). The resultant electron beams are accelerated to the final potential level by portions of a transmission-type target portion (13) of an anode electrode (20). The multi-X-ray beams (x) generated by the transmission-type target portion (13) pass through an X-ray shielding plate (23) and X-ray extraction portions (24) in a vacuum chamber and are extracted from the X-ray extraction windows (27) of a wall portion (25) into the atmosphere.
    Type: Grant
    Filed: December 17, 2010
    Date of Patent: March 20, 2012
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masahiko Okunuki, Osamu Tsujii, Takeo Tsukamoto
  • Publication number: 20110255664
    Abstract: An X-ray source includes an electron-beam generating unit that generates an electron beam, and a transmission type target electrode to be irradiated with the electron beam to generate X-ray radiation. A plurality of convex portions each having an inclined surface with respect to an incident direction of the electron beam is formed on a surface of the transmission type target electrode.
    Type: Application
    Filed: March 21, 2011
    Publication date: October 20, 2011
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Kazuyuki Ueda, Osamu Tsujii, Takao Ogura, Ichiro Nomura
  • Publication number: 20110249802
    Abstract: A multi X-ray generating apparatus which has a plurality of electron sources arranged two-dimensionally and targets arranged at positions opposite to the electron sources includes a multi electron source which includes a plurality of electron sources and outputs electrons from driven electron sources by selectively driving a plurality of electron sources in accordance with supplied driving signals, and a target unit which includes a plurality of targets which generate X-rays in accordance with irradiation of electrons output from the multi electron source and outputs X-rays with different radiation qualities in accordance with the generation locations of X-rays. The generation locations and radiation qualities of X-rays from the target unit are controlled by selectively driving the electron sources of the multi electron source.
    Type: Application
    Filed: June 22, 2011
    Publication date: October 13, 2011
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Masahiko Okunuki, Osamu Tsujii, Satoshi Shimizu, Takashi Ogura
  • Publication number: 20110249796
    Abstract: An X-ray imaging apparatus includes a multi X-ray source which includes a plurality of X-ray focuses to generate X-rays by irradiating X-ray targets with electron beams, a detector which detects X-rays which have been emitted from the multi X-ray source and have reached a detection surface, and a moving mechanism for moving the multi X-ray source within a plane facing the detection surface. The X-ray imaging apparatus acquires a plurality of X-ray detection signals from the detector by causing the multi X-ray source to perform X-ray irradiation while shifting the positions of a plurality of X-ray focuses which the detector has relative to the detection surface by moving the multi X-ray source using the moving mechanism. The apparatus then generates an X-ray projection image based on the plurality of X-ray detection signals acquired by the detector.
    Type: Application
    Filed: June 20, 2011
    Publication date: October 13, 2011
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Masahiko Okunuki, Makoto Sato, Osamu Tsujii, Takashi Ogura, Hisashi Namba
  • Publication number: 20110235783
    Abstract: An X-ray generating apparatus controls driving of an X-ray tube. The X-ray tube includes an electron source emitting electrons due to application of a voltage, a transmission-type target generating an X-ray due to collision of electrons emitted from the electron source, and a shield member disposed between the electron source and the transmission-type target, the shield member having an opening that electrons emitted from the electron source pass through, and blocking an X-ray that scatters toward the electron source. When generating the X-ray, application of a voltage to the transmission-type target is started, and emission of electrons from the electron source is caused after passage of a predetermined period indicating a time period from starting voltage application until the transmission-type target reaches a predetermined voltage. When stopping X-ray generation, application of the voltage to the transmission-type target is stopped after stopping the emission of electrons from the electron source.
    Type: Application
    Filed: March 9, 2011
    Publication date: September 29, 2011
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Takao Ogura, Ichiro Nomura, Kazuyuki Ueda, Osamu Tsujii
  • Publication number: 20110222652
    Abstract: A mammography apparatus includes a detector that detects X-rays transmitted through a breast, and an optically transparent or semitransparent pressing panel for pressing the breast. The apparatus further includes a near infrared ray source that provided between the X-ray source and the pressing panel and arranged in a two-dimensional shape in alignment with the pressing panel, and that is movable between a first position in close contact with the pressing panel and a second position outside an X-ray image capture region. Near infrared image capture is carried out using the near infrared ray source by causing the near infrared ray source to be in the first position, and the near infrared ray source is caused to retract to the second position when carrying out X-ray image capture using the X-ray source.
    Type: Application
    Filed: May 24, 2011
    Publication date: September 15, 2011
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Osamu Tsujii, Masakazu Morishita, Masahiko Okunuki, Satoshi Shimizu
  • Publication number: 20110216884
    Abstract: An X-ray imaging apparatus is provided with a multi X-ray source and a collimator in which a plurality of slits for X-rays to pass through are two-dimensionally formed, the size and position of the slits being adjustable. A control unit, as a first control mode, controls the size and position of the slits to move an examination region in parallel, when an X-ray source is changed to a different X-ray source, such that the examination directions are parallel before and after the change. Also, the control unit, as a second control mode, controls the size and position of the slits to rotate the examination direction, when an X-ray source is changed to a different X-ray source, such that the center of the examination regions is the same before and after the change.
    Type: Application
    Filed: November 9, 2009
    Publication date: September 8, 2011
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Osamu Tsujii, Makoto Sato, Masahiko Okunuki, Satoshi Shimizu, Takashi Ogura
  • Publication number: 20110188628
    Abstract: An X-ray imaging apparatus includes an X-ray source including a plurality of X-ray focuses, an X-ray detector which detects X-rays emitted from the X-ray focuses and transmitted through an object, and a control unit which controls the X-ray source and the X-ray detector. The X-ray imaging apparatus selects a pair of X-ray focuses, of X-ray focuses of the plurality of X-ray focuses which project images on the X-ray detector through a region of interest which is an imaging region of the object, from which emitted X-rays define an intersecting angle coinciding with a predetermined angle in the region of interest, and decides an X-ray focus to be used for imaging from X-ray focuses between the selected pair of X-ray focuses. An X-ray image is captured by emitting X-rays from the decided X-ray focus and causing the X-ray detector to detect the X-rays.
    Type: Application
    Filed: April 8, 2011
    Publication date: August 4, 2011
    Applicant: CANON KABUSHIKI KAISHA
    Inventor: Osamu Tsujii
  • Patent number: 7991120
    Abstract: A multi X-ray generating apparatus which has a plurality of electron sources arranged two-dimensionally and targets arranged at positions opposite to the electron sources includes a multi electron source which includes a plurality of electron sources and outputs electrons from driven electron sources by selectively driving a plurality of electron sources in accordance with supplied driving signals, and a target unit which includes a plurality of targets which generate X-rays in accordance with irradiation of electrons output from the multi electron source and outputs X-rays with different radiation qualities in accordance with the generation locations of X-rays. The generation locations and radiation qualities of X-rays from the target unit are controlled by selectively driving the electron sources of the multi electron source.
    Type: Grant
    Filed: February 27, 2009
    Date of Patent: August 2, 2011
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masahiko Okunuki, Osamu Tsujii, Satoshi Shimizu, Takashi Ogura
  • Patent number: 7991114
    Abstract: An X-ray imaging apparatus includes a multi X-ray source which includes a plurality of X-ray focuses to generate X-rays by irradiating X-ray targets with electron beams, a detector which detects X-rays which have been emitted from the multi X-ray source and have reached a detection surface, and a moving mechanism for moving the multi X-ray source within a plane facing the detection surface. The X-ray imaging apparatus acquires a plurality of X-ray detection signals from the detector by causing the multi X-ray source to perform X-ray irradiation while shifting the positions of a plurality of X-ray focuses which the detector has relative to the detection surface by moving the multi X-ray source using the moving mechanism. The apparatus then generates an X-ray projection image based on the plurality of X-ray detection signals acquired by the detector.
    Type: Grant
    Filed: April 20, 2010
    Date of Patent: August 2, 2011
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masahiko Okunuki, Makoto Sato, Osamu Tsujii, Takashi Ogura, Hisashi Namba
  • Patent number: 7978816
    Abstract: A control apparatus for controlling a multi radiation generating apparatus having a plurality of radiation generating devices which irradiate a two-dimensional sensor with radiation sets the intensity of radiation with which the plurality of radiation generating devices irradiate the two-dimensional sensor based on information about a part or physique of a patient, which is input by an input device.
    Type: Grant
    Filed: November 7, 2007
    Date of Patent: July 12, 2011
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tomohiko Matsuura, Masahiko Okunuki, Osamu Tsujii, Kazuhiro Matsumoto, Hiroyuki Shinbata, Yuichi Nishii