公开(公告)号：US20010009975A1

公开(公告)日：2001-07-26

申请号：US09793600

申请日：2001-02-27

Applicant: Hitachi, Ltd.

Inventor： Keiji Tsukada ,  Akihiko Kandori ,  Kenichi Okajima ,  Hitoshi Sasabuchi ,  Hiroyuki Suzuki ,  Shoji Kondo ,  Yasuaki Komiyama

IPC: A61B005/05

CPC classification number: A61B5/04005 ,  G01R33/0354 ,  G01R33/10

Abstract: A biomagnetic field measuring apparatus has a plurality of fluxmeters disposed externally of a living body and each including a superconducting quantum interference device (SQUID) for detecting a biomagnetic field generated from the living body, the plurality of fluxmeters being operative to detect a temporal change of a component of the biomagnetic field in a first direction which is vertical to the surface of the living body, an operation processor for performing computation for determining a temporal change of a value proportional to a root of square sum of differential value of the first-direction magnetic field component in second and third directions which cross the first direction and computation for integrating the temporal change of the value over a predetermined interval to determine an integral value, and a display for displaying the determined integral value. Distribution of magnetic fields generated from the heart is determined with a small number of fluxmeters.

Abstract translation: 生物磁场测量装置具有设置在生物体的外部的多个磁通量计，每个磁通量计包括用于检测从生物体产生的生物磁场的超导量子干涉装置（SQUID），所述多个磁通量计可操作以检测时间变化 生物磁场在与活体表面垂直的第一方向上的分量;运算处理器，用于执行计算，以确定与第一方向的差分值的平方和的根数成正比的值的时间变化 与第一方向交叉的第二方向和第三方向的磁场分量和用于对预定间隔内的值的时间变化进行积分的运算以确定积分值，以及用于显示所确定的积分值的显示。 由心脏产生的磁场的分布由少量的磁通计确定。

公开(公告)号：US20040193037A1

公开(公告)日：2004-09-30

申请号：US10810812

申请日：2004-03-29

Applicant: Hitachi, Ltd.

Inventor： Keiji Tsukada ,  Akihiko Kandori ,  Kenichi Okajima ,  Hitoshi Sasabuchi ,  Hiroyuki Suzuki ,  Shoji Kondo ,  Yasuaki Komiyama

IPC: A61B005/05

CPC classification number: A61B5/04005 ,  G01R33/0354 ,  G01R33/10

Abstract: A biomagnetic field measuring apparatus has a plurality of fluxmeters disposed externally of a living body and each including a superconducting quantum interference device (SQUID) for detecting a biomagnetic field generated from the living body, the plurality of fluxmeters being operative to detect a temporal change of a component of the biomagnetic field in a first direction which is vertical to the surface of the living body, an operation processor for performing computation for determining a temporal change of a value proportional to a root of square sum of differential value of the first-direction magnetic field component in second and third directions which cross the first direction and computation for integrating the temporal change of the value over a predetermined interval to determine an integral value, and a display for displaying the determined integral value. Distribution of magnetic fields generated from the heart is determined with a small number of fluxmeters.

公开(公告)号：US20020019589A1

公开(公告)日：2002-02-14

申请号：US09948857

申请日：2001-09-10

Applicant: Hitachi, Ltd.

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

IPC: A61B005/05

CPC classification number: A61B5/04005 ,  A61B5/04008 ,  A61B5/0444 ,  G01R33/0206 ,  G01R33/0358

Abstract: A magnetic field measurement apparatus comprises a plurality of magnetometers each comprising SQUID's and three detection coils each 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 waveform of magnitude null{square root}(Bx2nullBy2nullBz2)null 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 holding means for holding Dewar's vessel for arranging magnetometers therein, and a controlling means for controlling a positional relationship between the subject to be inspected and the Dewar's vessel. Accurate time variation of 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 three orthogonal directional magnetic field components ( Bx, By, Bz) of a magnetic field generated from current sources in the subject to be inspected.

Abstract translation: 磁场测量装置包括多个磁力计，每个磁力计包括SQUID和三个检测线圈，每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 其显示由待检查对象产生的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{{平方根}（Bx2 + By2 + Bz2）}的波形的时间变化， 用于将杜瓦尔的容器放置在其中以放置磁力计的保持装置，以及用于控制待检查对象与杜瓦尔船只之间的位置关系的控制装置。 通过同时测量磁场的三个正交方向磁场分量（Bx，By，Bz）中的每一个，可以检测从被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 从当前来源产生的被检查对象。

公开(公告)号：US20020173714A1

公开(公告)日：2002-11-21

申请号：US10189010

申请日：2002-07-05

Applicant: Hitachi, Ltd.

Inventor： Keiji Tsukada ,  Akihiko Kandori ,  Kenichi Okajima ,  Hitoshi Sasabuchi ,  Hiroyuki Suzuki ,  Shoji Kondo ,  Yasuaki Komiyama

IPC: A61B005/05

CPC classification number: A61B5/04005 ,  G01R33/0354 ,  G01R33/10

Abstract: A biomagnetic field measuring apparatus has a plurality of fluxmeters disposed externally of a living body and each including a superconducting quantum interference device (SQUID) for detecting a biomagnetic field generated from the living body, the plurality of fluxmeters being operative to detect a temporal change of a component of the biomagnetic field in a first direction which is vertical to the surface of the living body, an operation processor for performing computation for determining a temporal change of a value proportional to a root of square sum of differential value of the first-direction magnetic field component in second and third directions which cross the first direction and computation for integrating the temporal change of the value over a predetermined interval to determine an integral value, and a display for displaying the determined integral value. Distribution of magnetic fields generated from the heart is determined with a small number of fluxmeters.

Abstract translation: 生物磁场测量装置具有设置在生物体的外部的多个磁通量计，每个磁通量计包括用于检测从生物体产生的生物磁场的超导量子干涉装置（SQUID），所述多个磁通量计可操作以检测时间变化 生物磁场在与活体表面垂直的第一方向上的分量;运算处理器，用于执行计算，以确定与第一方向的差分值的平方和的根数成正比的值的时间变化 与第一方向交叉的第二方向和第三方向的磁场分量和用于对预定间隔内的值的时间变化进行积分的运算以确定积分值，以及用于显示所确定的积分值的显示。 由心脏产生的磁场的分布由少量的磁通计确定。