公开(公告)号：US5355085A

公开(公告)日：1994-10-11

申请号：US672866

申请日：1991-03-20

申请人： Yutaka Igarashi ,  Takao Goto ,  Takehiko Hayashi ,  Yoshiyasu Nakashima ,  Norio Fujimaki ,  Hajime Hayashi ,  Kohtaro Gotoh

发明人： Yutaka Igarashi ,  Takao Goto ,  Takehiko Hayashi ,  Yoshiyasu Nakashima ,  Norio Fujimaki ,  Hajime Hayashi ,  Kohtaro Gotoh

IPC分类号： G01R33/035

CPC分类号： G01R33/0356 ,  Y10S505/846

摘要： A plurality of SQUID flux sensors are supplied with their respective bias currents at the same time from a bias source. A superconducting multiplexer multiplexes output signals of the SQUID flux sensors during an interval of time when the bias currents are supplied to the SQUID flux sensors. A multiplexer, placed in a room-temperature environment, distributes each of the multiplexed output signals of the SQUID flux sensors to a respective one of the output terminals which correspond to the SQUID flux sensors. Each signal which has been output to an individual output terminal is counted by a counter, so that an external magnetic flux to a corresponding SQUID flux sensor is measured.

摘要翻译： 多个SQUID磁通传感器从偏置源同时被提供有它们各自的偏置电流。 超导多路复用器在偏置电流被提供给SQUID磁通传感器的时间间隔期间复用SQUID磁通传感器的输出信号。 放置在室温环境中的多路复用器将SQUID通量传感器的多路复用输出信号中的每一个分配给与SQUID通量传感器相对应的输出端子中的相应一个。 已经输出到各个输出端子的每个信号被计数器计数，从而测量到相应的SQUID磁通量传感器的外部磁通量。

公开(公告)号：US5287058A

公开(公告)日：1994-02-15

申请号：US887669

申请日：1992-05-26

申请人： Takao Goto ,  Yutaka Igarashi ,  Takehiko Hayashi ,  Yoshiyasu Nakashima

发明人： Takao Goto ,  Yutaka Igarashi ,  Takehiko Hayashi ,  Yoshiyasu Nakashima

IPC分类号： G01R33/035 ,  G01R33/02

CPC分类号： G01R33/0356 ,  Y10S505/846

摘要： A digital superconducting quantum interference device type fluxmeter includes a flux sensor unit which detects external magnetic flux to be measured using a SQUID ring, and outputs pulse signals of corresponding directions and numbers, and a counter unit which counts the number of pulse signals output by the flux sensor unit inclusive of the directions thereof, in order to measure the external magnetic flux based on the counted result of the counter unit. The fluxmeter further includes an offset detection unit which detects the offset quantity of the counter unit generated by the magnetic flux trapped by the SQUID ring, and a feedback unit that feeds back to the flux sensor unit a signal that is obtained based on the detected offset quantity and the counted result of the counter unit.

摘要翻译： 数字超导量子干涉装置型通量计包括：磁通传感器单元，其使用SQUID环检测待测量的外部磁通量，并输出相应方向和数字的脉冲信号;以及计数单元，其计数由 磁通传感器单元包括其方向，以便基于计数器单元的计数结果来测量外部磁通量。 磁通计进一步包括偏移检测单元，该偏移检测单元检测由SQUID环所捕获的磁通产生的计数器单元的偏移量，以及反馈单元，其将基于检测到的偏移获得的信号反馈到通量传感器单元 数量和计数器的计数结果。

公开(公告)号：US5495849A

公开(公告)日：1996-03-05

申请号：US268675

申请日：1994-06-30

申请人： Takehiko Hayashi ,  Takaki Shimura ,  Takao Goto ,  Yoshiyasu Nakashima

发明人： Takehiko Hayashi ,  Takaki Shimura ,  Takao Goto ,  Yoshiyasu Nakashima

IPC分类号： A61B5/05 ,  A61B5/04 ,  G01N27/82 ,  G01N33/483 ,  G01R33/035 ,  G01R33/10 ,  G06Q50/22 ,  G06Q50/24

CPC分类号： G01R33/0354 ,  A61B5/04005 ,  G01R33/10 ,  G01R33/1269

摘要： In a method/apparatus of the present invention, a plurality or pickup coils are employed at a plurality of detection points so as to measure magnetic field intensities induced from electric current generated on living organ: the detection points are spatially interpolated/extrapolated; equations to determine relations of a hypothetically located current to the magnetic field intensities at the detection points and the interpolated detection points are established; the magnetic field intensities are measured with the pickup coils; magnetic field intensities are estimated at the interpolated/extrapolated detection points from the magnetic field intensities measured by the pickup coils; and the hypothetically located electric current is calculated by applying said magnetic field intensities at the detection points and said interpolated/extrapolated detection points to said equation. Thus, the electric current value is estimated. The calculation is preferably carried out by a SVD method, where the hypothetically located current is placed at plural current source positions. Matrix constants in the SVD calculation is determined in advance to allow a quick calculation. The interpolated/extrapolated point may be determined according to a linear method or a spline method, or depending on the current location, or on the spatial differentiation of the magnetic field intensity, or may be changed with time.

摘要翻译： 在本发明的方法/装置中，在多个检测点采用多个或拾取线圈，以便测量由活体器官产生的电流引起的磁场强度：检测点被空间内插/外插; 确定在检测点和内插检测点处确定位置电流与磁场强度的关系的方程式; 用拾取线圈测量磁场强度; 根据由拾取线圈测量的磁场强度在内插/外插检测点处估计磁场强度; 并且通过将检测点处的所述磁场强度和所述内插/外推检测点的所述磁场强度应用于所述等式来计算假设位置的电流。 因此，估计电流值。 该计算优选地通过SVD方法进行，其中将假设位置的电流置于多个电流源位置。 预先确定SVD计算中的矩阵常数，以便快速计算。 内插/外插点可以根据线性方法或样条方法，或者取决于当前位置，或者根据磁场强度的空间差异来确定，或者可以随时间改变。

公开(公告)号：US5594849A

公开(公告)日：1997-01-14

申请号：US743065

申请日：1991-08-09

申请人： Roman B. Kuc ,  James J. Szinger ,  Takehiko Hayashi ,  Takao Goto ,  Yoshiyasu Nakashima ,  Takaki Shimura ,  Kenji Kawabe

发明人： Roman B. Kuc ,  James J. Szinger ,  Takehiko Hayashi ,  Takao Goto ,  Yoshiyasu Nakashima ,  Takaki Shimura ,  Kenji Kawabe

IPC分类号： A61B5/05 ,  A61B5/04 ,  A61B5/055 ,  G01R33/28 ,  G06Q50/00 ,  G06T1/00 ,  G06K15/00

CPC分类号： G01R33/28 ,  A61B5/04005

摘要： A method and apparatus for performing biomagnetic imaging to determine the location and intensity of current sources within a subject includes a sensor unit for sensing the magnetic field within the subject and for providing sensing signals. A signal processor defines a grid having multiple grid points and performs inverse estimation to determine the distribution of current sources on the defined grid based on the sensing signals. The signal processor then modifies the grid to improve the resolution of the current sources distributed on the grid. A control unit controls the operation of the signal processor and processes image data to provide magnified and non-magnified displays on a display unit. The biomagnetic imaging method and apparatus can be combined with a system for providing magnetic resonance imaging data so as to produce a superimposed display including an MRI image and a biomagnetic image.

摘要翻译： 用于执行生物磁性成像以确定对象内的电流源的位置和强度的方法和装置包括用于感测对象内的磁场并用于提供感测信号的传感器单元。 信号处理器定义具有多个网格点的网格，并执行反向估计，以基于感测信号来确定所定义网格上的电流源的分布。 然后，信号处理器修改电网以改善分布在电网上的电流源的分辨率。 控制单元控制信号处理器的操作并处理图像数据以在显示单元上提供放大和非放大显示。 生物磁性成像方法和装置可以与用于提供磁共振成像数据的系统组合，以便产生包括MRI图像和生物磁性图像的重叠显示。

公开(公告)号：US5093618A

公开(公告)日：1992-03-03

申请号：US550171

申请日：1990-07-09

申请人： Takao Goto ,  Yutaka Igarashi ,  Takehiko Hayashi

发明人： Takao Goto ,  Yutaka Igarashi ,  Takehiko Hayashi

IPC分类号： G01R33/035

CPC分类号： G01R33/0354 ,  Y10S505/846

摘要： In a multi-channel SQUID fluxmeter for detecting magnetic flux signals by use of an array of SQUID flux sensors each comprising a digital SQUID for providing a pulse output, multiplexers and the like are appropriately used to allow pulse signals output from the SQUID flux sensors to be switched on a time series basis in order to obtain a magnetic flux signal for each channel. Thus, only one processing circuit need to be provided for a large number of SQUID flux sensors, thus reducing the scale of the fluxmeter and making the device small.

公开(公告)号：US5045788A

公开(公告)日：1991-09-03

申请号：US499963

申请日：1990-03-27

申请人： Hajime Hayashi ,  Yutaka Igarashi ,  Takehiko Hayashi ,  Takao Goto ,  Shinichi Amemiya

发明人： Hajime Hayashi ,  Yutaka Igarashi ,  Takehiko Hayashi ,  Takao Goto ,  Shinichi Amemiya

IPC分类号： A61B5/055 ,  G01R33/035

CPC分类号： G01R33/0356 ,  Y10S505/846

摘要： A digital SQUID control system for measuring a weak magnetic flux irradiated from an object includes: a SQUID having Josephson junctions and a superconductively coil; a pick-up coil detecting the weak magnetic flux from the object and flowing a measuring current in the pick-up coil, and an input coil magnetically coupled to the superconductivity coil through the measuring current; a feedback coil magnetically coupled to the superconductivity coil through a feedback current; a feedback circuit for counting positive and negative pulses input from the SQUID, for converting count values to an analog voltage, and for converting the analog voltage to the feedback current; an alternating has current generating circuit connected to the SQUID through an injection terminal, for supplying the alternating bias current to the SQUID; and a pulse rate measuring circuit for calculating a sum of the positive and negative pulses, for converting the sum to an analog voltage, and for outputting the analog voltage to the alternating current generating circuit. Further, the alternating current generating circuit controls an amplitude of the alternating bias current in such a way that the sum of the positive and negative pulses per unit of time becomes constant, and the feedback circuit controls the feedback current under the controls of the alternating bias current amplitude in such a way that a difference between the positive pulses and the negative pulses becomes zero by flowing the feedback current through the magnetically coupled superconductivity coil.

摘要翻译： 用于测量从物体照射的弱磁通的数字SQUID控制系统包括：具有约瑟夫逊结和超导线圈的SQUID; 检测来自物体的弱磁通量和拾取线圈中的测量电流的拾取线圈，以及通过测量电流与超导线圈磁耦合的输入线圈; 通过反馈电流与超导线圈磁耦合的反馈线圈; 反馈电路，用于对从SQUID输入的正和负脉冲进行计数，用于将计数值转换为模拟电压，以及将模拟电压转换为反馈电流; 交替的电流产生电路通过注入端子连接到SQUID，用于向SQUID提供交流偏置电流; 以及脉冲率测量电路，用于计算正脉冲和负脉冲之和，用于将和转换为模拟电压，并将模拟电压输出到交流发生电路。 此外，交流发电电路以这样的方式控制交流偏置电流的振幅，使得每单位时间的正脉冲和负脉冲之和变得恒定，并且反馈电路在交流偏压的控制下控制反馈电流 电流幅度使得正脉冲和负脉冲之间的差通过使反馈电流流过磁耦合超导线圈而变为零。

公开(公告)号：US5451871A

公开(公告)日：1995-09-19

申请号：US550691

申请日：1990-07-10

申请人： Yutaka Igarashi ,  Takao Goto ,  Takehiko Hayashi

发明人： Yutaka Igarashi ,  Takao Goto ,  Takehiko Hayashi

IPC分类号： G01R33/022 ,  G01R33/035

CPC分类号： G01R33/022 ,  G01R33/0358 ,  Y10S336/01

摘要： A pick-up coil assembly for a multi-channel SQUID magnetometer. The assembly includes a base plate, a plurality of support bars fixedly mounted on the base plate so as to form a matrix, and a plurality of pick-up coil units fixedly mounted on the support bars, each pick-up coil unit having a first and second pick-up coil block. Each of the pick-up coil blocks has a support body, a pair of pick-up coils, connection pads and connection lines. The pair of pick-up coils, the connection pads and the connection lines are formed by a lithography technique on the support body.

摘要翻译： 用于多通道SQUID磁力计的拾取线圈组件。 组件包括基板，固定地安装在基板上以形成矩阵的多个支撑杆和固定地安装在支撑杆上的多个拾取线圈单元，每个拾取线圈单元具有第一 和第二拾取线圈块。 每个拾取线圈块具有支撑体，一对拾取线圈，连接垫和连接线。 一对拾取线圈，连接焊盘和连接线通过光刻技术形成在支撑体上。

公开(公告)号：US5285385A

公开(公告)日：1994-02-08

申请号：US495801

申请日：1990-03-16

申请人： Yutaka Igarashi ,  Takaki Shimura ,  Takehiko Hayashi

发明人： Yutaka Igarashi ,  Takaki Shimura ,  Takehiko Hayashi

IPC分类号： A61B5/04 ,  A61B5/05 ,  G06F15/00

CPC分类号： A61B5/04005

摘要： An estimated current dipole displaying system in which a weak magnetic field generated from the heart or brain is measured to estimate the position, direction, magnitude and depth from a body surface of a current dipole which is equivalent to a heart current or a current flowing in a nerve and the estimated current dipole is displayed on a two-dimensional display. A parameter, other than that used to indicate the magnitude and those inappropriate for combined use with the magnitude indicating parameter, is used as a depth indicating parameter and the current dipole is thus displayed.

摘要翻译： 测量从心脏或大脑产生的弱磁场的估计的当前偶极显示系统，以估计来自当前偶极子的体表的位置，方向，大小和深度，其相当于心电流或流过的电流 神经和估计的电流偶极显示在二维显示器上。 除了用于指示大小的参数和与幅度指示参数组合使用的不合适的参数被用作深度指示参数，并且因此显示当前偶极子。

公开(公告)号：US5113136A

公开(公告)日：1992-05-12

申请号：US468360

申请日：1990-01-22

申请人： Hajime Hayashi ,  Yutaka Igarashi ,  Takehiko Hayashi ,  Takaki Shimura ,  Kenji Kawabe

发明人： Hajime Hayashi ,  Yutaka Igarashi ,  Takehiko Hayashi ,  Takaki Shimura ,  Kenji Kawabe

IPC分类号： G01R33/025

CPC分类号： G01R33/025

摘要： An apparatus is provided for measuring a very weak magnetic field generated by a human body, etc. External magnetic noise components coming from other magnetic sources and existing around an object whose magnetic field is to be measured are detected by compensation coils of the apparatus. The compensation coils are oriented in multiple dimensional directions. The detected noise components are weighted and added to each other to correctly find the noise components. Thereafter, the noise components mixed in the objective very weak magnetic field are removed, thereby correctly measuring the very weak magnetic field.

公开(公告)号：US07477742B2

公开(公告)日：2009-01-13

申请号：US09799010

申请日：2001-03-06

申请人： Bintatsu Noda ,  Seigo Kotani ,  Takehiko Hayashi ,  Jun Kamada

发明人： Bintatsu Noda ,  Seigo Kotani ,  Takehiko Hayashi ,  Jun Kamada

IPC分类号： H04N7/167 ,  H04K1/00

CPC分类号： H04N7/1675 ,  G06F21/10 ,  G06F2221/2135 ,  H04N21/4405 ,  H04N21/44204 ,  H04N21/4627 ,  H04N21/8193 ,  H04N21/8355

摘要： A contents utilization control apparatus includes an input unit for inputting a) contents with control module that consist of contents and a control module, and b) a license with control module that consists of a license prepared from contents utilization approval information and a control module. The control module in the contents with control module and the control module in the license with control module cooperate with each other to carry out a control relating to the utilization of the contents.