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公开(公告)号：DE69420615D1
公开(公告)日：1999-10-21
申请号：DE69420615
申请日：1994-06-03
Applicant: SHIMADZU CORP
Inventor： TOMITA SADAMU , KAJIHARA SHIGEKI , YOSHIDA YOSHIKAZU , YAMAKI NAOKAZU
Abstract: A method and apparatus for deducing physical quantities such as positions, sizes and orientations of bioelectric current sources. Minute magnetic fields formed by the bioelectric current sources in a region under examination of an examinee are measured with a plurality of magnetic sensors arranged adjacent the region under examination. A plurality of lattice points are set in the region under examination. Physical quantities of the current sources are derived by solving a relational expression of unknown current sources at the lattice points and field data provided by the magnetic sensors, with a condition added thereto to minimize a norm of a vector having the current source at each of the lattice points. The lattice points are moved toward a lattice point having a large current value among the current sources computed. Checking is made whether a minimum distance among the lattice points having been moved is below a predetermined value. The current source computing step to the checking step are repeated for the lattice points having been removed, when the minimum distance exceeds the predetermined value, and the current source corresponding to a magnetic field occurring when the minimum distance is determined to be below the predetermined value is identified to be a true current source.
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公开(公告)号：FI942643A0
公开(公告)日：1994-06-03
申请号：FI942643
申请日：1994-06-03
Applicant: SHIMADZU CORP
Inventor： TOMITA SADAMU , KAJIHARA SHIGEKI , YOSHIDA YOSHIKAZU , YAMAKI NAOKAZU
Abstract: A method and apparatus for deducing physical quantities such as positions, sizes and orientations of bioelectric current sources. Minute magnetic fields formed by the bioelectric current sources in a region under examination of an examinee are measured with a plurality of magnetic sensors arranged adjacent the region under examination. A plurality of lattice points are set in the region under examination. Physical quantities of the current sources are derived by solving a relational expression of unknown current sources at the lattice points and field data provided by the magnetic sensors, with a condition added thereto to minimize a norm of a vector having the current source at each of the lattice points. The lattice points are moved toward a lattice point having a large current value among the current sources computed. Checking is made whether a minimum distance among the lattice points having been moved is below a predetermined value. The current source computing step to the checking step are repeated for the lattice points having been removed, when the minimum distance exceeds the predetermined value, and the current source corresponding to a magnetic field occurring when the minimum distance is determined to be below the predetermined value is identified to be a true current source.
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公开(公告)号：FI942643A
公开(公告)日：1994-12-05
申请号：FI942643
申请日：1994-06-03
Applicant: SHIMADZU CORP
Inventor： TOMITA SADAMU , KAJIHARA SHIGEKI , YOSHIDA YOSHIKAZU , YAMAKI NAOKAZU
Abstract: A method and apparatus for deducing physical quantities such as positions, sizes and orientations of bioelectric current sources. Minute magnetic fields formed by the bioelectric current sources in a region under examination of an examinee are measured with a plurality of magnetic sensors arranged adjacent the region under examination. A plurality of lattice points are set in the region under examination. Physical quantities of the current sources are derived by solving a relational expression of unknown current sources at the lattice points and field data provided by the magnetic sensors, with a condition added thereto to minimize a norm of a vector having the current source at each of the lattice points. The lattice points are moved toward a lattice point having a large current value among the current sources computed. Checking is made whether a minimum distance among the lattice points having been moved is below a predetermined value. The current source computing step to the checking step are repeated for the lattice points having been removed, when the minimum distance exceeds the predetermined value, and the current source corresponding to a magnetic field occurring when the minimum distance is determined to be below the predetermined value is identified to be a true current source.
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公开(公告)号：DE112013007238T5
公开(公告)日：2016-04-28
申请号：DE112013007238
申请日：2013-07-09
Applicant: SHIMADZU CORP
Inventor： TOMITA SADAMU
IPC: H01J35/06
Abstract: In einer Röntgenstrahlröhrenanordnung der vorliegenden Erfindung beinhaltet ein flachplattenförmiger Glühkörper 11 Beine 12, 13 (A, B) zur Vollbestrahlung bei elektrischer Erhitzung und Beine 14, 15 (C, D) zur Halbbestrahlung bei elektrischer Erhitzung. Eine Leistungsquelle 25 und ein veränderlicher Widerstand 27 sind elektrisch mit den Beinen 12, 13 zur Vollbestrahlung bei elektrischer Erhitzung verbunden, und eine Leistungsquelle 26 und ein veränderlicher Widerstand 28 sind elektrisch mit den Beinen 14, 15 zur Halbbestrahlung bei elektrischer Erhitzung verbunden. Es wird ein elektrischer Fluss durch die Beine 12, 13 zur Vollbestrahlung bei elektrischer Erhitzung erzeugt, um den gesamten Bereich einer Elektronenstrahlemissionsoberfläche zu erhitzen. Es wird ein elektrischer Fluss durch die Beine 14, 15 zur Halbbestrahlung bei elektrischer Erhitzung erzeugt, um einen schmaleren Bereich als der gesamte Bereich der Elektronenstrahlemissionsoberfläche zu erhitzen. Des Weiteren können die veränderlichen Widerstände 27, 28 die Werte des Stromes des elektrischen Flusses anpassen, um eine Elektronenemissionszone frei anzupassen, und man kann einen optionalen Fokusgrad zwischen dem Fokus, den man im Falle einer Gesamterhitzung erhält, und dem Fokus, den man im Falle einer Teilerhitzung erhält, erhalten.
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公开(公告)号：CA2279613A1
公开(公告)日：2001-02-04
申请号：CA2279613
申请日：1999-08-04
Applicant: SHIMADZU CORP
Inventor： TOYAMA KEISUKE , TOMITA SADAMU
IPC: A61B5/04
Abstract: Disclosed herein is a technique for accurately determining states of bioelectric currents occurring in particular positions in a site of interest of a patient. Transfer functions between the particular positions and each magnetic sensor are derived from a positional relationship between the site of interest and each magnetic sensor. Weight coefficients are computed from an inverse matrix obtained by adding a pre-determined value to a matrix of the transfer functions, and virtual biomagnetism information obtained virtually by bioelectric currents set to the particular positions. Enhanced biomagnetism information with only the biomagnetism from the particular positions enhanced is acquired by superposing the weight coefficients on measured biomagnetism information. Based on this enhanced biomagnetism information, states of bioelectric currents occurring in the particular positions are determined accurately.
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Patent Agency Ranking
公开(公告)号：DE69420615T2
公开(公告)日：1999-12-30
申请号：DE69420615
申请日：1994-06-03
Applicant: SHIMADZU CORP
Inventor： TOMITA SADAMU , KAJIHARA SHIGEKI , YOSHIDA YOSHIKAZU , YAMAKI NAOKAZU
Abstract: A method and apparatus for deducing physical quantities such as positions, sizes and orientations of bioelectric current sources. Minute magnetic fields formed by the bioelectric current sources in a region under examination of an examinee are measured with a plurality of magnetic sensors arranged adjacent the region under examination. A plurality of lattice points are set in the region under examination. Physical quantities of the current sources are derived by solving a relational expression of unknown current sources at the lattice points and field data provided by the magnetic sensors, with a condition added thereto to minimize a norm of a vector having the current source at each of the lattice points. The lattice points are moved toward a lattice point having a large current value among the current sources computed. Checking is made whether a minimum distance among the lattice points having been moved is below a predetermined value. The current source computing step to the checking step are repeated for the lattice points having been removed, when the minimum distance exceeds the predetermined value, and the current source corresponding to a magnetic field occurring when the minimum distance is determined to be below the predetermined value is identified to be a true current source.
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公开(公告)号：EP2911179A4
公开(公告)日：2016-08-31
申请号：EP12886920
申请日：2012-10-22
Applicant: SHIMADZU CORP
Inventor： TOMITA SADAMU , UKITA MASAAKI
CPC classification number: H01J35/14 , H01J35/16 , H01J35/305 , H01J2235/02 , H01J2235/16 , H01J2235/168
Abstract: An X-ray tube device (100) according to the present invention includes a cathode (1) generating an electron beam, an anode (2) generating an X-ray by collision of the electron beam from the cathode, an envelope (3) internally housing the cathode and the anode, a magnetic field generator (4) including a magnetic pole (4b) arranged to be opposed to the envelope, generating a magnetic field for focusing and deflecting the electron beam from the cathode to the anode, and an electric field relaxing electrode (5) arranged between the magnetic pole and the envelope, having an outer surface having a rounded shape. Thus, the magnetic field generator can be placed closer to the envelope while a tip end of the magnetic field generator is suppressed from being a discharge start point, and hence the effect of being capable of downsizing the X-ray tube device is achieved.
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公开(公告)号：EP2187426A4
公开(公告)日：2011-04-20
申请号：EP07792295
申请日：2007-08-09
Applicant: SHIMADZU CORP
Inventor： TOMITA SADAMU , HAYASHI SHIGEKI
CPC classification number: H01J35/14 , H01J35/16 , H01J35/305 , H01J2235/1212 , H01J2235/1216 , H01J2235/162
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公开(公告)号：JP2004259469A
公开(公告)日：2004-09-16
申请号：JP2003045874
申请日：2003-02-24
Applicant: Shimadzu Corp , 株式会社島津製作所
Inventor： MITAMURA SHIGEHIRO , OTA MASAHIRO , TAMURA TOMOMI , TOMITA SADAMU
IPC: G21K5/04 , H01J37/141 , H01J37/147 , H01J37/244
Abstract: PROBLEM TO BE SOLVED: To provide a scanning electron microscope by which lowering in the sensitivity and the reduction of the scanning range caused, when a detector leaves a specimen is eliminated, and an impact on secondary electrons that are detected by a magnetic field generated by scanning coils is eliminated.
SOLUTION: The microscope includes objective lens 2 which radiate charged particles to the specimen; scintillators 11 that are at the same axis 3 of an electron optics system and arranged inside the objective lenses 2 to detect a secondary electron; a photoconductor 13 that guides light optically converted by the scintillators 11 to the outside of the objective lenses 2; and a photomultiplier tube 12, that amplifies light guided by the photoconductor 13 and obtains a signal and scanning coils 4b, that is at least a part of a scanner 4 inside the objective lenses 2 but is installed outside the photoconductor 13, wherein the distance between the detector and the specimen S is shortened by arrangement positions of the scintillators 11 and the scanning coils 4 and solve the problems of lowered sensitivity and reduced scanning range.
COPYRIGHT: (C)2004,JPO&NCIPI-
公开(公告)号：JPH06343614A
公开(公告)日：1994-12-20
申请号：JP16045193
申请日：1993-06-04
Applicant: SHIMADZU CORP , SYST KEIKAKU KENKYUSHO KK
Inventor： TOMITA SADAMU , YAMAKI NAOICHI
IPC: A61B5/05
Abstract: PURPOSE:To establish a presuming method for vital organism activity current source with which a plurality of current sources can be presumed precisely while the accuracy in calculating the minimum norm solution is maintained. CONSTITUTION:A multi-channel SQUID sensor is furnished to acquire the magnetic field data produced by a vital organism activity current source in the body to be inspected. In presuming the position, size, and direction of the current source on the basis of the magnetic field data, the group of lattice points is set in the body (Step 1), and the current source of each lattice point is determined by the minimum norm method (Step 2). The certainty of existence of current source at each lattice point is determined (Step 3), and the groups of lattice points are classified on the basis the obtained result (Step 4). Other lattice points are moved to near the lattice point where the current source having the max, value within each grouping exists (Step 5), and the current source at each rearranged lattice point is presumed by the minimum norm method (Step 2). This procedure is repeated until the minimum lattice point spacing becomes below the specified level (Step 6), and the real current source is presumed.
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