Patents by Inventor Masaharu Tsuyuki
Masaharu Tsuyuki 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: 20060210014Abstract: An X-ray CT apparatus comprises three X-ray generating units, three groups of detecting elements and a reconstructing unit. The three X-ray generating units are arranged so as to make an angle formed by a first X-ray exposure direction and a second X-ray exposure direction on a rotational plane thereof be a same angle as that formed by the second X-ray exposure direction and a third X-ray exposure direction on the rotational plane, the same angle being smaller than 120 degree. The three groups of detecting elements are arranged opposite to the three X-ray generating units respectively so as to make a field of view formed in a center wider than two side fields of view. The reconstructing unit is configured to reconstruct an image using detection data detected by at least desired one of the three groups of the detecting elements.Type: ApplicationFiled: March 6, 2006Publication date: September 21, 2006Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA MEDICAL SYSTEMS CORPORATIONInventors: Miwa Okumura, Satoru Nakanishi, Masaharu Tsuyuki, Yasuo Saito
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Publication number: 20060198490Abstract: An X-ray computed tomographic apparatus includes a gantry unit having a detector having X-ray detection element rows along a slice direction and an X-ray tube and acquiring projection data from a subject by helical scanning, an extraction unit extracting first and second projection data sets corresponding to first and second heartbeat periods from the acquired projection data, each of the first and second projection data sets covering an angle range required for the reconstruction of one frame image, a processing unit weighting each of the extracted first and second projection data sets with a weight corresponding to a data acquisition position and generating a third data set by combining the weighted first and second projection data sets, and a reconstruction processing unit reconstructing one frame image data set on the basis of the generated third data set.Type: ApplicationFiled: March 6, 2006Publication date: September 7, 2006Inventors: Masaharu Tsuyuki, Satoru Nakanishi, Satoshi Saito
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Patent number: 7079618Abstract: An X-ray computed tomographic apparatus which employs both helical scan and segment reconstruction, specifies the temporal resolution of image data from a set helical pitch, a set rotational speed, and the heart rate of a patient, and then displays the specified temporal resolution on a scan plan screen.Type: GrantFiled: March 12, 2004Date of Patent: July 18, 2006Assignees: Kabushiki Kaisha Toshiba, Toshiba Medical Systems CorporationInventor: Masaharu Tsuyuki
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Patent number: 6922457Abstract: A computer tomography apparatus of this invention includes an x-ray tube configured to emit x-rays while rotating around an object to be examined, a radiation detector configured to have detection elements arranged in a plurality of rows along a slice-thickness direction, each row having a plurality of the detection elements configure to detect x-rays that had passed through the object, a data acquisition system configured to acquire projection data of the object using the output of the radiation detector, and a reconstructing unit configured to be capable of a first reconstruction method and a second reconstruction method, reconstruct an image based on the projection data using one of the first and second reconstruction method, wherein the x-rays are assumed to intersect perpendicularly with an axis of rotation of the x-ray tube in the first reconstruction method, and the second reconstruction method reconstructs the image using a cone angle information of the x-rays.Type: GrantFiled: November 29, 2002Date of Patent: July 26, 2005Assignee: Kabushiki Kaisha ToshibaInventors: Kiyoshi Nagata, Masaharu Tsuyuki
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Publication number: 20050089133Abstract: An X-ray computerized tomographic apparatus comprising a gantry which scans a patient with X-rays in order to acquire data on the patient, a decision unit which decides completion of the acquisition of the data on the basis of an electrocardiac waveform of the patient, and a scan controller which controls the gantry in order to end the scan or irradiation with the X-rays when the completion of the data acquisition has been decided.Type: ApplicationFiled: August 17, 2004Publication date: April 28, 2005Inventor: Masaharu Tsuyuki
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Patent number: 6876720Abstract: An X-ray computed tomography apparatus monitors the density of a contrast medium injected into a subject with a CT value by a preparation scan so as to adjust the main scan start timing. A guidance output unit outputs guidance to the subject. A control unit compares the CT value of tomographic image data obtained by the preparation scan with the first threshold, supplies guidance data to the guidance output unit to output the guidance to the subject when the CT value has reached the first threshold. The control unit compares the CT value of the tomographic image obtained by the preparation scan with the second threshold different from the first threshold, and starts executing the main scan or preparing the execution of the main scan when the CT value has reached the second threshold.Type: GrantFiled: October 29, 2002Date of Patent: April 5, 2005Assignee: Kabushiki Kaisha ToshibaInventor: Masaharu Tsuyuki
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Publication number: 20050047541Abstract: An X-ray CT apparatus comprises an X-ray radiation source configured to radiate X-rays toward an object, an X-ray detector including a plurality of X-ray detection segments, each of which includes a plurality of detection elements, a rotation control unit configured to control rotation of the X-ray radiation source, a reconstruction unit configured to reconstruct a tomographic image based on data collected by the X-ray detector. As one aspect of the X-rays CT apparatus, there is provided a fluoroscopic image creation unit configured to create a fluoroscopic image on a plane that crosses X-ray path connecting focus of the X-ray source to the center of the X-ray detector. As another aspect of the X-rays CT apparatus, there is provided an X-ray detector which is shaped arc. As another aspect of the X-rays CT apparatus, there is provided an operation unit configured to operate a position of the X-ray radiation source.Type: ApplicationFiled: July 2, 2004Publication date: March 3, 2005Applicant: KABUSHIKI KAISHA TOSHIBAInventor: Masaharu Tsuyuki
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Publication number: 20040179644Abstract: An X-ray computed tomographic apparatus which employs both helical scan and segment reconstruction, specifies the temporal resolution of image data from a set helical pitch, a set rotational speed, and the heart rate of a patient, and then displays the specified temporal resolution on a scan plan screen.Type: ApplicationFiled: March 12, 2004Publication date: September 16, 2004Inventor: Masaharu Tsuyuki
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Patent number: 6782071Abstract: An X-ray computed tomography apparatus, comprises an X-ray generator, an X-ray detector, a controller, and a display. The X-ray generator is configured to generate a first X-ray in a pre-scan mode and a second X-ray in an image scan mode. The X-ray detector is configured to detect a first transmission X-ray exposed through a specimen to a first exposure width of the X-ray detector along a body axis of the specimen, resulting from the first X-ray at a first scanning position in the pre-scan mode. The X-ray detector is further configured to detect a second transmission X-ray exposed through the specimen to a second exposure width of the X-ray detector along the body axis of the specimen, resulting from the second X-ray at a second scanning position in the image scan mode. The first exposure width is narrower than the second exposure width. The controller is configured to control the first scanning position and the second scanning position.Type: GrantFiled: February 19, 2003Date of Patent: August 24, 2004Assignee: Kabushiki Kaisha ToshibaInventor: Masaharu Tsuyuki
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Publication number: 20030108149Abstract: An X-ray computed tomography apparatus monitors the density of a contrast medium injected into a subject with a CT value by a preparation scan so as to adjust the main scan start timing. A guidance output unit outputs guidance to the subject. A control unit compares the CT value of tomographic image data obtained by the preparation scan with the first threshold, supplies guidance data to the guidance output unit to output the guidance to the subject when the CT value has reached the first threshold. The control unit compares the CT value of the tomographic image obtained by the preparation scan with the second threshold different from the first threshold, and starts executing the main scan or preparing the execution of the main scan when the CT value has reached the second threshold.Type: ApplicationFiled: October 29, 2002Publication date: June 12, 2003Inventor: Masaharu Tsuyuki
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Publication number: 20030099323Abstract: A computer tomography apparatus of this invention includes an x-ray tube configured to emit x-rays while rotating around an object to be examined, a radiation detector configured to have detection elements arranged in a plurality of rows along a slice-thickness direction, each row having a plurality of the detection elements configure to detect x-rays that had passed through the object, a data acquisition system configured to acquire projection data of the object using the output of the radiation detector, and a reconstructing unit configured to be capable of a first reconstruction method and a second reconstruction method, reconstruct an image based on the projection data using one of the first and second reconstruction method, wherein the x-rays are assumed to intersect perpendicularly with an axis of rotation of the x-ray tube in the first reconstruction method, and the second reconstruction method reconstructs the image using a cone angle information of the x-rays.Type: ApplicationFiled: November 29, 2002Publication date: May 29, 2003Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Kiyoshi Nagata, Masaharu Tsuyuki
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Patent number: 5848126Abstract: A radiation computed tomography apparatus of this invention includes a couch, a top board which carries the patient and is slidably arranged on the couch, a gantry which has an opening and acquires projection data of a patient by guiding the patient carried on the top board into the opening, reconstruction section for reconstructing the tomographic image of the patient by reconstructing the projection data acquired by the gantry, and adjusting section, arranged on or near the gantry, for adjusting the photographing condition of the patient for obtaining a predetermined tomographic image of the patient.Type: GrantFiled: August 26, 1996Date of Patent: December 8, 1998Assignee: Kabushiki Kaisha ToshibaInventors: Hidehiro Fujita, Masatoshi Tomura, Hisashi Tachizaki, Hideki Fujimoto, Manabu Hiraoka, Masaharu Tsuyuki, Naoko Hasegawa, Tomoyasu Komori, Makoto Suzuki, Hiroshi Hori, Yasuo Maruyama
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Patent number: 5748696Abstract: A radiation computed tomography apparatus of this invention includes a couch, a top board which carries the patient and is slidably arranged on the couch, a gantry which has an opening and acquires projection data of a patient by guiding the patient carried on the top board into the opening, reconstruction section for reconstructing the tomographic image of the patient by reconstructing the projection data acquired by the gantry, and adjusting section, arranged on or near the gantry, for adjusting the photographing condition of the patient for obtaining a predetermined tomographic image of the patient.Type: GrantFiled: August 26, 1996Date of Patent: May 5, 1998Assignee: Kabushiki Kaisha ToshibaInventors: Hidehiro Fujita, Masatoshi Tomura, Hisashi Tachizaki, Hideki Fujimoto, Manabu Hiraoka, Masaharu Tsuyuki, Naoko Hasegawa, Tomoyasu Komori, Makoto Suzuki, Hiroshi Hori, Yasuo Maruyama
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Patent number: 5740222Abstract: A radiation computed tomography apparatus of this invention includes a couch, a top board which carries the patient and is slidably arranged on the couch, a gantry which has an opening and acquires projection data of a patient by guiding the patient carried on the top board into the opening, reconstruction section for reconstructing the tomographic image of the patient by reconstructing the projection data acquired by the gantry, and adjusting section, arranged on or near the gantry, for adjusting the photographing condition of the patient for obtaining a predetermined tomographic image of the patient.Type: GrantFiled: February 24, 1997Date of Patent: April 14, 1998Assignee: Kabushiki Kaisha ToshibaInventors: Hidehiro Fujita, Masatoshi Tomura, Hisashi Tachizaki, Hideki Fujimoto, Manabu Hiraoka, Masaharu Tsuyuki, Naoko Hasegawa, Tomoyasu Komori, Makoto Suzuki, Hiroshi Hori, Yasuo Maruyama
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Patent number: 5651043Abstract: There is provided a radiotherapy system comprising: a radiotherapy planning CT system integratedly having an X-ray scanner member for acquiring image data of a diagnostic portion of a subject by irradiating X-rays to the subject, said diagnostic portion including a lesion, a radiotherapy planner member for displaying the image data and producing radiotherapy plan data including a position data of an isocenter and a contour data of a radiation field limiting radiations from a virtual radiation source irradiated into the diagnostic portion, and a positioning member for automatically pointing a marking position on the subject based on the position data of the isocenter; and a radiotherapy apparatus for carrying out radiotherapy on the basis of the therapy plan data.Type: GrantFiled: March 27, 1995Date of Patent: July 22, 1997Assignee: Kabushiki Kaisha ToshibaInventors: Masaharu Tsuyuki, Yasuhiro Seki, Hisahiro Shinohara, Masao Yamahana, Takeo Nabatame