公开(公告)号：US4437136A

公开(公告)日：1984-03-13

申请号：US389075

申请日：1982-06-16

申请人： Etsuji Yamamoto ,  Kensuke Sekihara ,  Hideki Kohno

发明人： Etsuji Yamamoto ,  Kensuke Sekihara ,  Hideki Kohno

IPC分类号： A61B10/00 ,  A61B5/055 ,  G01R33/389 ,  G05F7/00 ,  H01F5/00 ,  H01F7/18 ,  H01H47/00

CPC分类号： G05F7/00

摘要： An electromagnet having a current detecting device for detecting the current flowing through an electromagnet exciting coil, the output of which is utilized to control the power supplied to the coil to stabilize the current flowing through the coil; the electromagnet further including a separate power supply to supply current to the current detecting device which supplies current to the current detecting device when the electromagnet is not on working.

摘要翻译： 一种具有电流检测装置的电磁体，用于检测流过电磁激励线圈的电流，该电磁检测装置的输出用于控制提供给线圈的功率以稳定流经线圈的电流; 电磁体还包括单独的电源，以向电流检测装置提供电流，当电磁体不工作时，电流检测装置向电流检测装置提供电流。

公开(公告)号：US4211926A

公开(公告)日：1980-07-08

申请号：US901241

申请日：1978-04-28

申请人： Chitose Nakaya ,  Hideki Kohno ,  Hidemi Shiono ,  Kensuke Sekihara ,  Shinji Yamamoto ,  Teruichi Tomura ,  Takayuki Hayakawa

发明人： Chitose Nakaya ,  Hideki Kohno ,  Hidemi Shiono ,  Kensuke Sekihara ,  Shinji Yamamoto ,  Teruichi Tomura ,  Takayuki Hayakawa

IPC分类号： G01N23/04 ,  A61B6/03 ,  A61B8/00 ,  G06Q50/22 ,  G06Q50/24 ,  G06T11/00 ,  G03B41/16

CPC分类号： A61B6/032

摘要： In a system in which the tomographic image of an object under investigation is produced on the basis of the amount of absorption of radiation by the object when a source of radiation and a plurality of radiation sensitive detectors with the object interposed therebetween are rotated around the object, the output signal from at least one of the plural detectors is used to correct the radiation absorption amount. Another selected one of the plural detectors may be used for checking whether the object is positioned within a useful detection view.

摘要翻译： 在这样一个系统中，在被照明物体插入其间的物体的多个辐射敏感探测器围绕物体旋转时，基于物体的辐射吸收量产生被研究对象的断层图像 使用来自多个检测器中的至少一个的输出信号来校正辐射吸收量。 多个检测器中的另一选择的一个可以用于检查对象是否位于有用的检测视图内。

公开(公告)号：US4739265A

公开(公告)日：1988-04-19

申请号：US846151

申请日：1986-03-31

申请人： Etsuji Yamamoto ,  Kensuke Sekihara ,  Hidemi Shiono ,  Hideki Kohno

发明人： Etsuji Yamamoto ,  Kensuke Sekihara ,  Hidemi Shiono ,  Hideki Kohno

IPC分类号： G01R33/485 ,  G01R33/565 ,  G01R33/20

CPC分类号： G01R33/565 ,  G01R33/485 ,  G01R33/56527

摘要： A method for providing spin density distribution images of an object, discriminated with respect to plural chemical shifts. This method is performed by repeating a measurement sequence in a spin warp imaging method, of the spin data plural times, with a time difference .DELTA..tau. between a time interval .tau..sub.1 from spin excitation to a 180.degree. RF pulse and a time interval .tau..sub.2 from the 180.degree. RF pulse to a peak of a spin echo, altering .DELTA..tau. in the ways corresponding the number of chemical shifts to be discriminated from one another, subjecting the respective spin data to two-dimensional Fourier transform to provide plural sets of spin data for respective coordinates in a spatial domain, and solving simultaneous equations of the sets of spin data to provide spin densities corresponding to the respective chemical shifts.

摘要翻译： 一种用于提供对象的自旋密度分布图像的方法，其被鉴别为多个化学位移。 该方法通过在旋转数据成像方法中重复自旋数据多次的测量序列，其中从自旋激发到180°RF脉冲的时间间隔τ1与时间间隔τ2之间的时间差DELTAτ 从180°RF脉冲到自旋回波的峰值，以相应于要彼此区分的化学位移数的方式改变DELTA tau，对各自旋转数据进行二维傅里叶变换以提供多组旋转 用于空间域中的各个坐标的数据，以及求解自旋数据组的联立方程以提供对应于各个化学位移的自旋密度。

公开(公告)号：US4672320A

公开(公告)日：1987-06-09

申请号：US600159

申请日：1984-04-13

申请人： Kensuke Sekihara ,  Masao Kuroda ,  Hideki Kohno

发明人： Kensuke Sekihara ,  Masao Kuroda ,  Hideki Kohno

IPC分类号： A61B10/00 ,  A61B5/055 ,  G01R33/385 ,  G01R33/387 ,  G01R33/3875 ,  G01R33/565 ,  G01R33/20

CPC分类号： G01R33/56563

摘要： An NMR imaging apparatus and method for direct Fourier imaging. This apparatus includes a static magnetic field generator, gradient magnetic field generators, high-frequency magnetic field generator, signal detecting detector for detecting a nuclear magnetic resonance signal from a body to be inspected, a computer for performing an arithmetic operation for the detected signal to obtain the nuclear magnetic resonance intensity distribution in the to-be-inspected body from measured values of the nuclear magnetic resonance intensity distribution at various points on a rectangular coordinate system in the Fourier space, and memories used for correction. In the imaging apparatus, that distortion of image data obtained by calculation from the detected signal which is caused by the deviation of the intensity of the static magnetic field from a predetermined value or the deviation of the intensity of a gradient magnetic field from a predetermined, linearly-varying intensity, is corrected by those measured values with respect to the above deviation of magnetic field intensity which are previously in the memory, and corrected image data is displayed on a display device.

摘要翻译： 用于直接傅里叶成像的NMR成像装置和方法。 该装置包括静态磁场发生器，梯度磁场发生器，高频磁场发生器，用于检测来自被检体的核磁共振信号的信号检测检测器，用于对检测信号执行算术运算的计算机 从傅立叶空间中的矩形坐标系上的各个点的核磁共振强度分布的测量值和用于校正的存储器中获得待检查体的核磁共振强度分布。 在成像装置中，通过由检测信号计算得到的图像数据的失真是由静磁场的强度与预定值的偏差或梯度磁场的强度的偏差相关联的， 线性变化强度通过相对于预先存储在存储器中的上述磁场强度偏差的那些测量值进行校正，校正后的图像数据被显示在显示装置上。

公开(公告)号：US4625171A

公开(公告)日：1986-11-25

申请号：US579967

申请日：1984-02-14

申请人： Kensuke Sekihara ,  Masao Kuroda ,  Hideki Kohno

发明人： Kensuke Sekihara ,  Masao Kuroda ,  Hideki Kohno

IPC分类号： A61B10/00 ,  A61B5/055 ,  G01R33/385 ,  G01R33/565 ,  G06T1/00 ,  G01R33/20

CPC分类号： G01R33/56563 ,  G01R33/56518

摘要： An NMR imaging apparatus for reconstructing a cross section of a body to be inspected, by the projection-reconstruction method. That is, an apparatus for forming the above cross section in such a manner that the nuclear magnetic resonance is caused by the to-be-inspected body in the resulting magnetic field of a static magnetic field and a rotatable gradient field, a projection of the to-be-inspected body is detected at each rotational positions of the gradient field, and the cross section is reconstructed using the above projection. The apparatus comprises memories for previously storing therein data indicating the distorsion of magnetic field such as the non-uniformity of the static magnetic field and the non-linearity of the gradient field, in order to perform the coordinate calculation in the back projection, using the data stored in the memories.

摘要翻译： 一种用于通过投影重建方法重建被检体的横截面的NMR成像装置。 也就是说，一种用于形成上述横截面的装置，使得核磁共振是在静磁场和可旋转梯度场的所得磁场中被被检查体引起的， 在梯度场的每个旋转位置处检测被检查体，并且使用上述投影重建横截面。 该装置包括用于预先存储表示磁场变形的数据的存储器，例如静态磁场的不均匀性和梯度场的非线性度，以便在后投影中执行坐标计算，使用 存储在存储器中的数据。

公开(公告)号：US4212062A

公开(公告)日：1980-07-08

申请号：US919627

申请日：1978-06-27

申请人： Hideki Kohno ,  Hidemi Shiono ,  Chitose Nakaya ,  Kensuke Sekihara ,  Teruichi Tomura ,  Shinji Yamamoto ,  Takayuki Hayakawa ,  Isao Horiba ,  Shigenobu Yanaka

发明人： Hideki Kohno ,  Hidemi Shiono ,  Chitose Nakaya ,  Kensuke Sekihara ,  Teruichi Tomura ,  Shinji Yamamoto ,  Takayuki Hayakawa ,  Isao Horiba ,  Shigenobu Yanaka

IPC分类号： G01N23/04 ,  A61B6/03 ,  G06Q50/22 ,  G06Q50/24 ,  G06T11/00 ,  G06F15/34

CPC分类号： A61B6/032 ,  G06T11/006 ,  Y10S378/901

摘要： A tomographic imaging system is disclosed in which the quantity of absorption or transmittance of a transmissive radiation by or through a certain tomographic cross-section of an object under consideration is detected and the distribution of radiation absorption or transmittance in the cross-section is reconstructed through a convolution operation. A weighting function used in the convolution operation is prepared with a predetermined one of its positive orders the value of which is an integration of the weighting function from the predetermined positive order to positive infinity and a predetermined one of its negative orders the value of which is in integration of the weighting function from the predetermined negative order to negative infinity.

摘要翻译： 公开了一种断层图像成像系统，其中检测由所考虑的物体的特定断层摄影横截面或通过所考虑的物体的某些断层摄影横截面的透射辐射的吸收或透射率，并且通过以下方式重建横截面中的辐射吸收或透射率的分布： 卷积运算 在卷积运算中使用的加权函数以其正值中的预定的一个准备，该值的正值为加权函数从预定的正阶数到正无穷大的积分，以及负值的预定值，其值是 将加权函数从预定的负数整合到负无穷大。

公开(公告)号：US6051834A

公开(公告)日：2000-04-18

申请号：US126432

申请日：1998-07-30

申请人： Hiroshi Kakibayashi ,  Yasuhiro Mitsui ,  Hideo Todokoro ,  Katsuhiro Kuroda ,  Masanari Koguchi ,  Kazutaka Tsuji ,  Tatsuo Makishima ,  Mikio Ichihashi ,  Shigeto Isakozawa ,  Ruriko Tsuneta ,  Kuniyasu Nakamura ,  Kensuke Sekihara ,  Jun Motoike

发明人： Hiroshi Kakibayashi ,  Yasuhiro Mitsui ,  Hideo Todokoro ,  Katsuhiro Kuroda ,  Masanari Koguchi ,  Kazutaka Tsuji ,  Tatsuo Makishima ,  Mikio Ichihashi ,  Shigeto Isakozawa ,  Ruriko Tsuneta ,  Kuniyasu Nakamura ,  Kensuke Sekihara ,  Jun Motoike

IPC分类号： H01J37/26 ,  H01J37/28

CPC分类号： H01J37/28 ,  H01J2237/226 ,  H01J2237/2802 ,  H01J2237/2807

摘要： 3-dimensional observation on the atomic arrangement and atomic species in a thin-film specimen are carried out at high speed and accuracy by an electron microscope which measures electrons emitted at high angle from the specimen. A scanning transmission electron microscope has an electron detection device comprising a scintillator converting electrons detected thereby to photons, a photoconductive-film converting photons from the scintillator detected thereby to c.a. 1000 times as many electron-hole pairs as these photons.

摘要翻译： 通过电子显微镜高速准确地进行薄膜样品中的原子排列和原子物质的三维观察，该电子显微镜测量从试样以高角度发射的电子。 扫描透射电子显微镜具有电子检测装置，该电子检测装置包括将由此检测的电子转化为光子的闪烁体，从其检测的闪烁体的光电导膜转换光子至c.a. 这些光子是电子 - 空穴对的1000倍。

公开(公告)号：US5598453A

公开(公告)日：1997-01-28

申请号：US517852

申请日：1995-08-22

申请人： Rika Baba ,  Ken Ueda ,  Kensuke Sekihara ,  Hironori Ueki ,  Keiji Umetani

发明人： Rika Baba ,  Ken Ueda ,  Kensuke Sekihara ,  Hironori Ueki ,  Keiji Umetani

IPC分类号： A61B6/03 ,  G21K5/10

CPC分类号： A61B6/032 ,  A61B6/0457

摘要： An X-ray apparatus for collecting X-ray transmission data of a subject from a plurality of directions to generate an X-ray transmission image or X-ray CT image of the subject, which includes an X-ray generator for generating an X-ray, an X-ray detector for detecting a transmission X-ray after the X-ray generated by the X-ray generator is transmitted through the subject, a rotation unit for rotating an imaging unit including the X-ray generator and the X-ray detector around the subject, a data collector for converting an output signal of the X-ray detector to a digital signal and collecting the digital signal, a signal processor for subjecting data collected by the data collector to a signal processing operation, a display for displaying thereon as an image the data collected by the data collector and the data subjected by the signal processor to the signal processing operation, and a position change unit for moving a relative position of a rotation center of the imaging unit and the subject in a direction parallel to a rotation plane of the rotation, and wherein the imaging unit is rotated by the rotator around the subject and at the same time the relative position is changed by the position change unit in a direction parallel to the rotation plane to perform X-ray fluoroscopic or radiographic operation or CT scan.

摘要翻译： 一种用于从多个方向收集被检体的X射线透射数据的X射线装置，以生成被检体的X射线透射图像或X射线CT图像，该X射线透射图像或X射线CT图像包括：X射线发生器， 用于检测由X射线发生器产生的X射线之后的透射X射线的X射线检测器被传送通过对象，旋转单元，用于旋转包括X射线发生器和X射线发射器的成像单元， 射线检测器，用于将X射线检测器的输出信号转换为数字信号并收集数字信号的数据收集器，用于对由数据收集器收集的数据进行信号处理操作的信号处理器，用于 将由数据收集器收集的数据和由信号处理器经受的数据作为图像显示在信号处理操作上;以及位置改变单元，用于移动成像单元的旋转中心和su的相对位置 在平行于旋转的旋转平面的方向上进行，并且其中成像单元由旋转体围绕被摄体旋转，同时位置改变单元在与旋转平面平行的方向上改变相对位置， 执行X射线透视或放射照相术或CT扫描。

公开(公告)号：US5848114A

公开(公告)日：1998-12-08

申请号：US821539

申请日：1997-03-21

申请人： Hiroyuki Kawai ,  Kensuke Sekihara ,  Nagaaki Ohyama ,  Masahiro Yamaguchi ,  Takashi Obi

发明人： Hiroyuki Kawai ,  Kensuke Sekihara ,  Nagaaki Ohyama ,  Masahiro Yamaguchi ,  Takashi Obi

IPC分类号： A61B6/03 ,  G06T11/00

CPC分类号： G06T11/003 ,  Y10S378/901

摘要： A computerized tomography system including an X-ray source for emitting X-rays in a cone-beam shape, a two-dimensional X-ray image acquirer which is arranged so as to face the X-ray source and acquires an image of an object by using the X-rays; and rotator for rotating the X-ray source and the two-dimensional x-ray image acquirer around the object, wherein a three-dimensional reconstructed image is formed from the projection images acquired by the two-dimensional X-ray image acquirer while rotating the rotator. An iterative reconstruction calculator for forming the three-dimensional reconstructed image from the projection images is provided. The three-dimensional reconstructed image without artifacts can be acquired from a small amount of projection data.

摘要翻译： 包括用于发射锥形束X射线的X射线源的计算机断层摄影系统，被配置为面对X射线源并获取对象的图像的二维X射线图像获取器 通过使用X射线; 旋转器，用于将X射线源和二维X射线图像获取器旋转到物体周围，其中由二维X射线图像获取器获取的投影图像形成三维重建图像，同时旋转 旋转器 提供了一种用于从投影图像形成三维重建图像的迭代重建计算器。 可以从少量的投影数据获取无伪像的三维重建图像。

公开(公告)号：US5426365A

公开(公告)日：1995-06-20

申请号：US13425

申请日：1993-02-04

申请人： Kensuke Sekihara ,  Yukiko Ogura

发明人： Kensuke Sekihara ,  Yukiko Ogura

IPC分类号： A61B5/05 ,  A61B5/04 ,  A61B5/053 ,  G01R33/00 ,  G01R33/02 ,  G01R33/035 ,  G01R33/10

CPC分类号： G01R33/02 ,  A61B5/04008 ,  A61B5/0536

摘要： In a magnetic field generation source measuring method and system for determining a magnetic field generation source in an object to be examined from a magnetic field in the interior of the object measured at the exterior of the object, the object is represented by a model in which the object is divided into a plurality of cells. The resistance values of each cell in x, y and z directions are determined from information concerning the electric conductivity of the interior of the object beforehand measured. Supposing the distribution of electromotive forces in the object as a current source, a return current generated in accordance with the electromotive force distribution in the object is determined by use of estimated values of the intensities of the current source in the x, y and z directions and the resistance values. A vector of the sum of a current of the current source and the return current is determined for all of the cells. The second power of the absolute value of a difference between the vector of the sum and a current vector determined from the magnetic field in the interior of the object measured at the exterior of the object is subjected to summation for all of the cells. The estimated values of the current source intensities, which minimize the summation, are determined as an electromotive force distribution in the object.

摘要翻译： 在用于在物体外部测量的物体内部的磁场中确定待检测物体中的磁场产生源的磁场产生源测量方法和系统中，该对象由以下模型表示：其中， 该对象被分成多个单元。 x，y和z方向上的每个单元的电阻值由预先测量的物体内部的电导率的信息确定。 假设物体中的电动势作为电流源的分布，通过使用x，y和z方向上的电流源的强度的估计值来确定根据物体中的电动势分布产生的返回电流 和电阻值。 为所有单元确定电流源的电流和返回电流之和的向量。 在对象外部测量的对象内部的磁场确定的和矢量的矢量和当前矢量之间的差的绝对值的第二功率对所有单元进行求和。 将求和的最小值的电流源强度的估计值确定为物体中的电动势分布。