Patents by Inventor Masahiko Yamazaki
Masahiko Yamazaki 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: 7583782Abstract: An X-ray CT apparatus and image controlling method thereof that achieves a higher time resolution tomography image on a region of interest (ROI) of an object while reducing a total amount of X-ray irradiation exposure. The X-ray CT apparatus includes an X-ray source for irradiating X-rays over an object, a multi-slice detector provided facing to the X-ray source for acquiring wide range projection data by a first helical scan, a wide range projection data memory unit for storing the wide range projection data, and a narrow range projection data memory unit for storing the narrow range projection data of a designated region of interest (ROI) only. A controlling method for the X-ray CT apparatus acquires narrow range projection data by a second scan on the ROI along a slice direction and generates compounded projection data based on the narrow range projection data and the wide range projection data. The method generates images based on the compounded projection data.Type: GrantFiled: December 28, 2006Date of Patent: September 1, 2009Assignees: Kabushiki Kaisha Toshiba, Toshiba Medical Systems CorporationInventor: Masahiko Yamazaki
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Patent number: 7555097Abstract: There is disclosed an X-ray computer tomography system having an X-ray tube for producing X-rays, an X-ray detector including plural detector modules, a rotation mechanism by which the X-ray tube and the X-ray detector are held so as to be rotatable about an axis of rotation, a reconstruction unit for reconstructing images based on the output from the detector, and a display unit for displaying the reconstructed images. Each of the detector modules has plural detector elements arranged in a matrix. The detector elements act to detect the X-rays transmitted through a subject to be examined. The detector modules are arranged along a reference axis substantially perpendicular to the axis of rotation and tilted relative to the axis of rotation.Type: GrantFiled: August 11, 2006Date of Patent: June 30, 2009Assignees: Kabushiki Kaisha Toshiba, Toshiba Medical Systems CorporationInventor: Masahiko Yamazaki
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Patent number: 7526070Abstract: The angle of each collimator plate with respect to an X ray focal point is determined by fitting the collimator plate in grooves formed in upper and lower supports each having an integral structure. In addition, the warpage of each collimator plate is corrected and its flatness is maintained by fitting the periphery of the collimator plate which is on the X ray detector side in a corresponding groove of an abutment plate provided on the X ray detection surface side of the upper and lower supports. Furthermore, each collimator plate is supported by the corresponding grooves of the upper and lower supports and the corresponding groove of the abutment plate on at least three sides.Type: GrantFiled: April 14, 2006Date of Patent: April 28, 2009Assignees: Kabushiki Kaisha Toshiba, Toshiba Medical Systems CorporationInventors: Kenji Igarashi, Masaharu Shimizu, Akiji Wakabayashi, Yasuo Saito, Machiko Iso, Tsuguo Kishi, Shigeru Sakuta, Masaru Kitamura, Ryuhachiro Doji, Hideki Ide, Shuya Nambu, Masahiko Yamazaki, Katsuya Yamada, Yasutada Nakagawa
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Patent number: 7278332Abstract: A linear motion device has: a linear motion body externally fitted onto a shaft and making a relative linear motion along the shaft; a plurality of balls retained in a rolling element groove formed in an inner surface of the linear motion body, and rolling between the rolling element groove and the shaft; separators interposed among the balls; and a circulating path formed in the linear motion body and for circulating the balls from one end side of the rolling element groove to the other end side thereof; wherein the linear motion device is charged with grease containing base oil which is 220-395 in worked penetration defined by JIS K2220 and 50-500 mm2/s in kinematic viscosity at 40° C.Type: GrantFiled: January 16, 2003Date of Patent: October 9, 2007Assignee: NSK Ltd.Inventors: Shinya Nakatani, Masahiko Yamazaki, Hirotoshi Miyajima, Yasuyuki Matsuda
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Publication number: 20070220997Abstract: A linear motion device has: a linear motion body externally fitted onto a shaft and making a relative linear motion along the shaft; a plurality of balls retained in a rolling element groove formed in an inner surface of the linear motion body, and rolling between the rolling element groove and the shaft; separators interposed among the balls; and a circulating path formed in the linear motion body and for circulating the balls from one end side of the rolling element groove to the other end side thereof; wherein the linear motion device is charged with grease containing base oil which is 220-395 in worked penetration defined by JIS K2220 and 50-500 mm2/s in kinematic viscosity at 40° C.Type: ApplicationFiled: May 18, 2007Publication date: September 27, 2007Inventors: Shinya Nakatani, Masahiko Yamazaki, Hirotoshi Miyajima, Yasuyuki Matsuda
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Rolling bearing, rolling bearing for fuel cell, compressor for fuel cell system and fuel cell system
Patent number: 7265080Abstract: The rolling bearing of the invention to be incorporated in the compressor for fuel cell system comprises a fluorine-based grease containing a fluororesin and a fluorine-based oil, a urea grease containing a urea compound and a synthetic oil or a lithium complex grease containing a lithium complex and a synthetic oil encapsulated therein. In this arrangement, the grease deterioration of the rolling bearing incorporated in the compressor for force-feeding various fluids between machines can be prevented, making it possible to provide a fuel cell system which can maintain stable operation over an extended period of time.Type: GrantFiled: May 20, 2003Date of Patent: September 4, 2007Assignee: NSK Ltd.Inventors: Kenichi Iso, Hirotoshi Miyajima, Katsuaki Denpou, Yujiro Toda, Masahiko Yamazaki, Michiharu Naka, Yasunobu Fujita -
Publication number: 20070147576Abstract: An X-ray CT apparatus and image controlling method thereof that achieves a higher time resolution tomography image on a region of interest (ROI) of an object while reducing a total amount of X-ray irradiation exposure. The X-ray CT apparatus includes an X-ray source for irradiating X-rays over an object, a multi-slice detector provided facing to the X-ray source for acquiring wide range projection data by a first helical scan, a wide range projection data memory unit for storing the wide range projection data, and a narrow range projection data memory unit for storing the narrow range projection data of a designated region of interest (ROI) only. A controlling method for the X-ray CT apparatus acquires narrow range projection data by a second scan on the ROI along a slice direction and generates compounded projection data based on the narrow range projection data and the wide range projection data. The method generates images based on the compounded projection data.Type: ApplicationFiled: December 28, 2006Publication date: June 28, 2007Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA MEDICAL SYSTEMS CORPORATIONInventor: Masahiko Yamazaki
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Publication number: 20070071162Abstract: There is disclosed an X-ray computer tomography system having an X-ray tube for producing X-rays, an X-ray detector including plural detector modules, a rotation mechanism by which the X-ray tube and the X-ray detector are held so as to be rotatable about an axis of rotation, a reconstruction unit for reconstructing images based on the output from the detector, and a display unit for displaying the reconstructed images. Each of the detector modules has plural detector elements arranged in a matrix. The detector elements act to detect the X-rays transmitted through a subject to be examined. The detector modules are arranged along a reference axis substantially perpendicular to the axis of rotation and tilted relative to the axis of rotation.Type: ApplicationFiled: August 11, 2006Publication date: March 29, 2007Inventor: Masahiko YAMAZAKI
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Rolling bearing, rolling bearing for fuel cell, compressor for fuel cell system and fuel cell system
Publication number: 20060252655Abstract: The rolling bearing of the invention to be incorporated in the compressor for fuel cell system comprises a fluorine-based grease containing a fluororesin and a fluorine-based oil, a urea grease containing a urea compound and a synthetic oil or a lithium complex grease containing a lithium complex and a synthetic oil encapsulated therein. In this arrangement, the grease deterioration of the rolling bearing incorporated in the compressor for force-feeding various fluids between machines can be prevented, making it possible to provide a fuel cell system which can maintain stable operation over an extended period of time.Type: ApplicationFiled: July 6, 2006Publication date: November 9, 2006Inventors: Kenichi Iso, Hirotoshi Miyajima, Katsuaki Denpou, Yujiro Toda, Masahiko Yamazaki, Michiharu Naka, Yasunobu Fujita -
Rolling bearing, rolling bearing for fuel cell, compressor for fuel cell system and fuel cell system
Publication number: 20060252654Abstract: The rolling bearing of the invention to be incorporated in the compressor for fuel cell system comprises a fluorine-based grease containing a fluororesin and a fluorine-based oil, a urea grease containing a urea compound and a synthetic oil or a lithium complex grease containing a lithium complex and a synthetic oil encapsulated therein. In this arrangement, the grease deterioration of the rolling bearing incorporated in the compressor for force-feeding various fluids between machines can be prevented, making it possible to provide a fuel cell system which can maintain stable operation over an extended period of time.Type: ApplicationFiled: July 6, 2006Publication date: November 9, 2006Inventors: Kenichi Iso, Hirotoshi Miyajima, Katsuaki Denpou, Yujiro Toda, Masahiko Yamazaki, Michiharu Naka, Yasunobu Fujita -
Patent number: 7085343Abstract: An X-ray computed tomography apparatus of this invention includes a first data detecting system which includes a first X-ray tube and a first X-ray detector and a second data detecting system which includes a second X-ray tube and a second X-ray detector. A reconstructing unit reconstructs image data on the basis of the data detected by at least one of the first and second data detecting systems. A monitoring unit monitors the first data detecting system. In a period during which the first data detecting system is normal, data acquisition is performed by both the first and second data detecting systems. In a period during which the first data detecting system is faulty, data acquisition is performed by the second data detecting system alone.Type: GrantFiled: October 17, 2002Date of Patent: August 1, 2006Assignee: Kabushiki Kaisha ToshibaInventors: Toshiyuki Shinno, Yuji Yanagida, Shigeyuki Nakashima, Yoshiaki Yaoi, Miwa Okumura, Minoru Horinouchi, Masahiko Yamazaki, Machiko Iso, Satoru Nakanishi
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Publication number: 20060101935Abstract: A linear motion device has: a linear motion body externally fitted onto a shaft and making a relative linear motion along the shaft; a plurality of balls retained in a rolling element groove formed in an inner surface of the linear motion body, and rolling between the rolling element groove and the shaft; separators interposed among the balls; and a circulating path formed in the linear motion body and for circulating the balls from one end side of the rolling element groove to the other end side thereof; wherein the linear motion device is charged with grease containing base oil which is 220-395 in worked penetration defined by JIS K2220 and 50-500 mm2/s in kinematic viscosity at 40° C.Type: ApplicationFiled: January 16, 2003Publication date: May 18, 2006Inventors: Shinya Nakatani, Masahiko Yamazaki, Hirotoshi Miyajima, Yasuyuki Matsuda
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Rolling bearing, rolling bearing for fuel cell, compressor for fuel cell system and fuel cell system
Publication number: 20050261141Abstract: The rolling bearing of the invention to be incorporated in the compressor for fuel cell system comprises a fluorine-based grease containing a fluororesin and a fluorine-based oil, a urea grease containing a urea compound and a synthetic oil or a lithium complex grease containing a lithium complex and a synthetic oil encapsulated therein. In this arrangement, the grease deterioration of the rolling bearing incorporated in the compressor for force-feeding various fluids between machines can be prevented, making it possible to provide a fuel cell system which can maintain stable operation over an extended period of time.Type: ApplicationFiled: May 20, 2003Publication date: November 24, 2005Inventors: Kenichi Iso, Hirotoshi Miyajima, Katsuaki Denpou, Yujiro Toda, Masahiko Yamazaki, Michiharu Naka, Yasunobu Fujita -
Patent number: 6947516Abstract: An X-ray apparatus including an X-ray source, a rotation mechanism which rotates the X-ray source about a rotational axis, and an X-ray detector having a plurality of detection elements. A blocking member defining a slit structure is provided between the X-ray source and the X-ray detector. The slits of the blocking member include two rows aligned in a channel direction of the detector elements, and two rows staggered in the channel direction, thereby to obtain a CT image with improved spatial resolution. Alternatively, instead of using a blocking member, some of the detection elements of at least one detection segment are staggered in the channel direction with respect to detection elements of another detection segment.Type: GrantFiled: February 20, 2002Date of Patent: September 20, 2005Assignee: Kabushiki Kaisha ToshibaInventors: Miwa Okumura, Masahiko Yamazaki, Satoru Nakanishi, Toshihiro Rifu, Souji Miyashita
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Patent number: 6834097Abstract: An X-ray CT apparatus and method in which irradiated X-rays are effectively used, and the imaging of a wide-range scanogram can be conducted in a short time. The X-ray CT apparatus includes an X-ray tube for generating X-rays, an X-ray detector having a plurality of rows of X-ray detector elements arrayed in a slice thickness direction for detecting X-rays transmitted through a subject, a selector configured to select the row of the X-ray detector elements in the slice thickness direction necessary for generating a scanogram for a pre-set slice width, and a scanogram processing unit for generating the scanogram by using a data detected by the row of X-ray detector elements selected by the selector.Type: GrantFiled: October 7, 2002Date of Patent: December 21, 2004Assignee: Kabushiki Kaisha ToshibaInventor: Masahiko Yamazaki
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Patent number: 6822828Abstract: The present invention discloses a magnetic head which allows smooth filling of a non-magnetic material such as glass, and can prevent bubbles from generating within the such non-magnetic material, which comprises a slide-contact plane with which a magnetic recording medium comes into contact, which is provided on a magnetic core; a magnetic gap provided in the slide-contact plane by forming thereon at least a magnetic film; a groove portion provided at one end or each of both ends of the magnetic gap so as to be aligned approximately in parallel to a moving direction of the magnetic recording medium; and a non-magnetic material provided in the groove portion, wherein the groove portion has a non-magnetic oxide film and a chromium film formed on an inner surface thereof and has the non-magnetic material formed on the chromium film so as to fill the groove portion.Type: GrantFiled: July 17, 2001Date of Patent: November 23, 2004Assignee: Sony CorporationInventors: Masahiko Yamazaki, Yoshihiko Inoue
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Patent number: 6778628Abstract: An X-ray computed tomography apparatus is provided to reconstruct image data based on projection data acquired by scanning a subject with an X-ray. A calculator is configured to calculate a dose efficiency index based on an expected dose of an X-ray radiated from an input device. The dose efficiency index indicates a diameter of a target which is identified at a predetermined detectability rate and has a predetermined CT value difference with respect to a surrounding CT value. A plan support system is configured to build up a scan planning screen on which the input expected dose is contained along with the calculated dose efficiency index. The scan planning screen is displayed on a display.Type: GrantFiled: March 31, 2003Date of Patent: August 17, 2004Assignee: Kabushiki Kaisha ToshibaInventors: Masahiko Yamazaki, Miwa Okumura, Shinsuke Tsukagoshi
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Publication number: 20040013223Abstract: An X-ray computed tomography apparatus is provided to reconstruct image data based on projection data acquired by scanning a subject with an X-ray. A calculator is configured to calculate a dose efficiency index based on an expected dose of an X-ray radiated from an input device. The dose efficiency index indicates a diameter of a target which is identified at a predetermined detectability rate and has a predetermined CT value difference with respect to a surrounding CT value. A plan support system is configured to build up a scan planning screen on which the input expected dose is contained along with the calculated dose efficiency index. The scan planning screen is displayed on a display.Type: ApplicationFiled: March 31, 2003Publication date: January 22, 2004Inventors: Masahiko Yamazaki, Miwa Okumura, Shinsuke Tsukagoshi
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Publication number: 20030215210Abstract: The present invention includes a first recording and reproducing apparatus having a recording section configured to record digital information and a control section configured to read the digital information from the recording section and then output the information to the exterior, on the basis of a backup request transmitted to the recording section, and a second recording and reproducing apparatus configured to be controlled by the first recording and reproducing apparatus to record the digital information output to the exterior by the control section.Type: ApplicationFiled: March 14, 2003Publication date: November 20, 2003Applicant: KABUSHIKI KAISHA TOSHIBAInventor: Masahiko Yamazaki
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Publication number: 20030076920Abstract: An X-ray computed tomography apparatus of this invention includes a first data detecting system which includes a first X-ray tube and a first X-ray detector and a second data detecting system which includes a second X-ray tube and a second X-ray detector. A reconstructing unit reconstructs image data on the basis of the data detected by at least one of the first and second data detecting systems. A monitoring unit monitors the first data detecting system. In a period during which the first data detecting system is normal, data acquisition is performed by both the first and second data detecting systems. In a period during which the first data detecting system is faulty, data acquisition is performed by the second data detecting system alone.Type: ApplicationFiled: October 17, 2002Publication date: April 24, 2003Inventors: Toshiyuki Shinno, Yuji Yanagida, Shigeyuki Nakashima, Yoshiaki Yaoi, Miwa Okumura, Minoru Horinouchi, Masahiko Yamazaki, Machiko Iso, Satoru Nakanishi