公开(公告)号：US20070272599A1

公开(公告)日：2007-11-29

申请号：US11746144

申请日：2007-05-09

申请人： Tsuyoshi Miyashita ,  Akihiko Kandori ,  Kuniomi Ogata

发明人： Tsuyoshi Miyashita ,  Akihiko Kandori ,  Kuniomi Ogata

IPC分类号： B07C5/00

CPC分类号： A61B5/1101 ,  A61B5/1124 ,  A61B5/1125 ,  A61B5/1126 ,  A61B5/6826

摘要： In a moving body inspection apparatus, sequential waveform data obtained from a movement sensor is analyzed, wherein a plurality of waveforms from the waveform data is generated; phases compared among a plurality of movement waveforms; and a result of comparing phases are displayed. A partial waveform in a frequency analysis time interval having a predetermined length is extracted from a plurality of the movement waveforms. A frequency analysis operation is performed for the extracted partial waveforms to calculate phases at maximum power frequencies in the frequency analysis time interval; a phase difference is calculated among a plurality of the movement waveforms. The peaks may be detected in a plurality of movement waveforms. Peak intervals are calculated between adjoining peaks which adjoin each other in time base out of the peaks. The peaks among the movement waveforms are matched. Phase differences are calculated among a plurality of the movement waveforms.

摘要翻译： 在移动体检查装置中，分析从移动传感器获得的顺序波形数据，其中生成来自波形数据的多个波形; 在多个运动波形之间进行比较; 并显示比较结果的结果。 从多个运动波形中提取具有预定长度的频率分析时间间隔中的部分波形。 对所提取的部分波形执行频率分析操作，以计算频率分析时间间隔内的最大功率频率的相位; 在多个运动波形之间计算出相位差。 可以在多个移动波形中检测峰值。 在峰之间的时基相邻的相邻峰之间计算峰间隔。 运动波形中的峰值相匹配。 在多个移动波形中计算出相位差。

公开(公告)号：US06853185B2

公开(公告)日：2005-02-08

申请号：US10844480

申请日：2004-05-13

申请人： Akira Tsukamoto ,  Koichi Yokosawa ,  Daisuke Suzuki ,  Akihiko Kandori ,  Keiji Tsukada

发明人： Akira Tsukamoto ,  Koichi Yokosawa ,  Daisuke Suzuki ,  Akihiko Kandori ,  Keiji Tsukada

IPC分类号： A61B5/05 ,  G01R33/025 ,  G01R33/035 ,  G01R33/02

CPC分类号： G01R33/0358 ,  G01R33/025

摘要： A magnetic field measurement system for canceling an external field is provided, in which plurality of sensing magnetometers (3) for measuring a magnetic field signal in a direction perpendicular to the center axis of a cylindrical magnetic shield (1) are arranged in two dimensions on a plane parallel to the center axis and a reference magnetometer (4) for measuring the external field parallel to the center axis as a reference signal is disposed on a plane perpendicular to the plane parallel to the center axis. The reference signal multiplied by a specified factor is subtracted from a difference between signals from the adjacent sensing magnetometers (3). The magnetic field measurement system allows measurement of an extremely weak magnetic field by efficiently canceling the external field.

摘要翻译： 提供了用于消除外部场的磁场测量系统，其中用于在与圆柱形磁屏蔽（1）的中心轴垂直的方向上测量磁场信号的多个感测磁力计（3）被二维地布置在 平行于中心轴的平面和用于测量与中心轴平行的外场作为参考信号的参考磁力计（4）设置在垂直于平行于中心轴的平面的平面上。 从相邻感测磁力计（3）的信号之间的差中减去乘以指定因子的参考信号。 磁场测量系统允许通过有效地消除外部场来测量极弱的磁场。

公开(公告)号：US06842637B2

公开(公告)日：2005-01-11

申请号：US09948857

申请日：2001-09-10

申请人： Keiji Tsukada ,  Akihiko Kandori ,  Tsuyoshi Miyashita ,  Hiroyuki Suzuki ,  Hitoshi Sasabuchi

发明人： Keiji Tsukada ,  Akihiko Kandori ,  Tsuyoshi Miyashita ,  Hiroyuki Suzuki ,  Hitoshi Sasabuchi

IPC分类号： A61B5/04 ,  A61B5/0444 ,  G01R33/02 ,  G01R33/035 ,  A61B5/05

CPC分类号： A61B5/04005 ,  A61B5/04008 ,  A61B5/0444 ,  G01R33/0206 ,  G01R33/0358

摘要： A magnetic field measurement apparatus includes a plurality of magnetometers each having SQUID's and three detection coils, one of which detects each of three orthogonal directional magnetic field components (Bx, By, Bz) of a magnetic field generated from a subject to be inspected, a display which displays time variation of waveforms of the magnitude (√(Bx2+By2+Bz2)) of magnetic field synthesized by square sum of each of the three orthogonal directional magnetic field components of the magnetic field generated from the subject to be inspected, a holder for holding a Dewar's vessel for arranging magnetometers therein, and a controller for controlling a positional relationship between the subject to be inspected and the Dewar's vessel. Accurate time variation of the magnetic field generated from the subject to be inspected can be detected without influence of positional change of the subject to be inspected, by simultaneously measuring each of the three orthogonal directional magnetic field components (Bx, By, Bz) of the magnetic field generated from current sources in the subject to be inspected.

摘要翻译： 磁场测量装置包括多个具有SQUID和三个检测线圈的磁力计，其中一个检测线圈检测从被检查对象产生的磁场的三个正交方向磁场分量（Bx，By，Bz）中的每一个， 显示器，其显示由磁场的三个正交方向磁场分量中的每一个的平方和合成的磁场的幅度（√（Bx2 + By2 + Bz2））的波形的时间变化 从被检查对象产生的持有人，用于在其中放置磁力计的Dewar的血管的持有人，以及用于控制待检查对象与Dewar的血管之间的位置关系的控制器。 通过同时测量被检查对象的三个正交方向磁场分量（Bx，By，Bz）中的每一个，可以检测从待检查对象产生的磁场的精确时间变化，而不受被检查对象的位置变化的影响 从被检查对象的电流源产生的磁场。

公开(公告)号：US06815949B2

公开(公告)日：2004-11-09

申请号：US10162748

申请日：2002-06-06

申请人： Akihiko Kandori ,  Tsuyoshi Miyashita ,  Keiji Tsukada ,  Koichi Yokosawa ,  Daisuke Suzuki ,  Akira Tsukamoto

发明人： Akihiko Kandori ,  Tsuyoshi Miyashita ,  Keiji Tsukada ,  Koichi Yokosawa ,  Daisuke Suzuki ,  Akira Tsukamoto

IPC分类号： G01R33035

CPC分类号： G01R33/0356 ,  A61B5/04005 ,  A61B5/04007 ,  A61B5/04008 ,  A61B5/0522

摘要： An apparatus can detect a magnetic field with a high sensitivity using an ordinary-temperature pickup coil even when the pickup coil is arranged outside a cryostat. Specifically, the apparatus for measuring a magnetic field includes a pickup coil for detecting an external magnetic field, a SQUID electrically or magnetically connected to the pickup coil, a cryostat for holding the SQUID at low temperatures, and a driving device for driving the SQUID. The pickup coil is made of a normal-conducting material and is placed at an ordinary temperature outside the cryostat. By arranging outside the cryostat, the pickup coil can be brought close to a subject and can thereby detect a weak magnetic field in the subject with a high sensitivity.

公开(公告)号：US06275719B1

公开(公告)日：2001-08-14

申请号：US09293885

申请日：1999-04-19

申请人： Akihiko Kandori ,  Tsuyoshi Miyashita ,  Keiji Tsukada ,  Hitoshi Sasabuchi ,  Hiroyuki Suzuki

发明人： Akihiko Kandori ,  Tsuyoshi Miyashita ,  Keiji Tsukada ,  Hitoshi Sasabuchi ,  Hiroyuki Suzuki

IPC分类号： A61B505

CPC分类号： A61B5/04007 ,  A61B5/02411

摘要： A biomagnetic field measurement apparatus comprises, a plurality of magnetometers each having a SQUID sensor and a detection coil and each detecting a magnetic field generated from a heart of a fetus in a mother; a processor processing magnetic field wave forms detected by the magnetometers; and a display displaying results obtained by the processor. The processor estimates a position of a current dipole from the magnetic field wave forms, and processes projecting the position of the current dipole on a first plane parallel to a plane on which one ends of the magnetometers are disposed on processes projecting the position of the current dipole on a second plane perpendicular to the plane on which the one ends of the magnetometers are disposed. The position of the current dipole projected on the first plane and the position of the current dipole projected on the second plane are displayed on the display.

摘要翻译： 生物磁场测量装置包括：多个磁力计，每个磁力计具有SQUID传感器和检测线圈，并且各自检测从母体的胎儿的心脏产生的磁场; 由磁力计检测到的处理器处理磁场波形的处理器; 以及显示由处理器获得的结果的显示。 处理器估计来自磁场波形的当前偶极子的位置，并且处理将电流偶极子的位置投影在平行于其上的磁力计的一端上的平面的第一平面上，该平面位于突出电流位置的过程 偶极子在垂直于其上放置磁力计的一端的平面的第二平面上。 投影在第一平面上的当前偶极子的位置和投影在第二平面上的当前偶极子的位置显示在显示器上。