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1. 发明授权

US4672318A Method of measuring the static magnetic field distribution in an NMR inspection system 失效
标题翻译：在NMR检查系统中测量静态磁场分布的方法
公开(公告)号：US4672318A
公开(公告)日：1987-06-09
申请号：US696909
申请日：1985-01-31
申请人： Kensuke Sekihara , Etsuji Yamamoto , Shigeru Matsui , Hideki Kohno
发明人： Kensuke Sekihara , Etsuji Yamamoto , Shigeru Matsui , Hideki Kohno
IPC分类号： G01R33/20 , A61B5/055 , A61B10/00 , G01R33/24 , G01R33/38 , G01R33/387
CPC分类号： G01R33/24
摘要： A method of measuring a static magnetic field distribution in a nuclear magnetic resonance (NMR) inspection system which comprises magnetic field generator for producing a static magnetic field, inclination or gradient magnetic fields and a high-frequency magnetic field, a signal detector for sensing nuclear magnetic resonance signals from an inspection sample, a computer for processing output signals from the signal detector and an output device for providing a computational result of the computer, wherein a time interval t.sub.1 from the center of a 90.degree.-pulse high-frequency magnetic field to the center of a 180.degree.-pulse high-frequency magnetic field is made different by a time difference t.sub.0 from a time interval t.sub.2 from the center of the 180.degree.-pulse high-frequency magnetic field to a peak of a spin echo, so that static magnetic field distribution is calculated based on the computer output which corresponds to the difference of the two time intervals.
摘要翻译：一种在核磁共振（NMR）检查系统中测量静磁场分布的方法，其包括用于产生静磁场，倾斜或梯度磁场和高频磁场的磁场发生器，用于感测核的信号检测器来自检查样本的磁共振信号，用于处理来自信号检测器的输出信号的计算机和用于提供计算机的计算结果的输出装置，其中从90°脉冲高频磁场的中心起的时间间隔t1 从180°脉冲高频磁场的中心到从180°脉冲高频磁场的中心到自旋回波的峰值的时间间隔t2由时间差t0变化到180°脉冲高频磁场的中心，因此基于对应于两个时间间隔的差的计算机输出来计算静态磁场分布。

2. 发明授权

US4716369A High speed imaging method with three-dimensional NMR 失效
标题翻译：高速成像方法采用三维NMR
公开(公告)号：US4716369A
公开(公告)日：1987-12-29
申请号：US746663
申请日：1985-06-20
申请人： Kensuke Sekihara , Shigeru Matsui , Hideki Kohno , Etsuji Yamamoto , Hidemi Shiono
发明人： Kensuke Sekihara , Shigeru Matsui , Hideki Kohno , Etsuji Yamamoto , Hidemi Shiono
IPC分类号： G01R33/485 , G01R33/561 , G01R33/20
CPC分类号： G01R33/485 , G01R33/5615 , G01R33/5616
摘要： The present invention is an imaging method using three-dimensional NMR to which an echo-planar method is applied. After excitation of nuclear spins, the gradient magnetic field Gx for phase-encoding is applied and there is repeated a sequence of measuring and obtaining an echo train of spin-echoes with a constant gradient magnetic field Gx and a periodically-inverted gradient magnetic field Gy, as varying the amount of encoding, so as to obtain the three-dimensional imaging by the Fourier-conversion. Moreover, after the selective excitation of spins within an X-Y surface, a 180.degree. radio frequency pulse is applied. As varying the time difference .tau..sub..epsilon. between the interval from the excitation until the application of the 180.degree. radio frequency pulse and the interval from the application thereof until a peak of a first echo of an echo train, three-dimensional imaging is carried out with a chemical shift axis as one axis by repeating the sequence and accomplishing Fourier-conversion with .tau..sub..epsilon. as a numerical variable.
摘要翻译：本发明是使用采用回波平面法的三维NMR的成像方法。在激励核自旋之后，施加用于相位编码的梯度磁场Gx，并且重复测量并获得具有恒定梯度磁场Gx和周期性反转梯度磁场Gy的自旋回波回波序列的序列，因为改变编码量，从而通过傅里叶变换获得三维成像。此外，在X-Y表面中的自旋选择性激发之后，施加180°射频脉冲。随着从激励到施加180°射频脉冲的间隔与从应用到应用的间隔直到回波列的第一回波的峰值之间的时间差τεε改变，三维成像是化学位移轴作为一个轴，通过重复该序列，并以tauε作为数值变量进行傅里叶变换。

3. 发明授权

US4472683A Imaging apparatus using nuclear magnetic resonance 失效
标题翻译：使用核磁共振成像设备
公开(公告)号：US4472683A
公开(公告)日：1984-09-18
申请号：US420303
申请日：1982-09-20
申请人： Kensuke Sekihara , Etsuji Yamamoto , Hideki Kohno , Shinji Yamamoto
发明人： Kensuke Sekihara , Etsuji Yamamoto , Hideki Kohno , Shinji Yamamoto
IPC分类号： A61B10/00 , A61B5/055 , G01R33/48 , G01R33/54 , G01R33/08
CPC分类号： G01R33/4833
摘要： An imaging apparatus using nuclear magnetic resonance is disclosed in which both an image corresponding to the projection of a nuclear spin distribution in a to-be-inspected object on a two-dimensional plane and a display mark indicating a desired measuring position are displayed on a display face of a display device such as a CRT display, the display mark is freely moved on the display face to be set at a desired position on the display face, and magnetic field generating means for generating a static magnetic field, linear gradient field, or radio frequency magnetic field is controlled on the basis of the desired position of the display mark to obtain an image of that cross section of the object which is located at a position indicated by the display mark.
摘要翻译：公开了一种使用核磁共振的成像装置，其中在二维平面上的被检查物体中的核自旋分布的投影和指示期望的测量位置的显示标记的图像都显示在 CRT显示器等显示装置的显示面，在显示面上自由移动显示标记，将其设定在显示面上的期望位置，产生静磁场，线性梯度场，或者基于显示标记的期望位置来控制射频磁场，以获得位于由显示标记指示的位置处的对象的该横截面的图像。

4. 发明授权

US4558425A NMR Imaging apparatus of changeable inspecting zone size 失效
标题翻译：可变检测区尺寸的NMR成像仪
公开(公告)号：US4558425A
公开(公告)日：1985-12-10
申请号：US413821
申请日：1982-09-01
申请人： Etsuji Yamamoto , Kensuke Sekihara , Hideki Kohno , Shinji Yamamoto
发明人： Etsuji Yamamoto , Kensuke Sekihara , Hideki Kohno , Shinji Yamamoto
IPC分类号： A61B10/00 , A61B5/055 , A61B5/107 , G01R33/28 , G01R33/38 , G01R33/48 , G01R33/58 , G01N15/00
CPC分类号： G01R33/381 , A61B5/1077 , G01R33/28 , G01R33/58
摘要： In an imaging apparatus using nuclear magnetic resonance which includes apparatus for generating a static magnetic field, a linear gradient magnetic field and a radio frequency magnetic field, respectively, signal detection device for detecting the nuclear magnetic resonant signal from an object to be inspected, a computer for calculating from the detection signal an image and output device for displaying the result of calculation by the computer, the improvement wherein the size of the object to be inspected is detected by use of ultrasonic wave or light beams and a signal indicative of the detected size of the object is applied to the linear gradient magnetic field generation apparatus so as to control the intensity of the linear gradient magnetic field.
摘要翻译：在使用核磁共振的成像装置中，分别包括用于产生静磁场的装置，线性梯度磁场和射频磁场，用于检测来自被检体的核磁共振信号的信号检测装置，用于从检测信号计算用于显示计算机的计算结果的图像和输出装置的计算机，其中通过使用超声波或光束来检测要检查的对象的大小，以及指示检测到的信号的信号物体的大小被施加到线性梯度磁场产生装置，以便控制线性梯度磁场的强度。

5. 发明授权

US4437136A Electromagnet 失效
标题翻译：电磁铁
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。

6. 发明授权

US4739265A NMR imaging method 失效
标题翻译： NMR成像方法
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。

7. 发明授权

US4689568A NMR chemical shift imaging method 失效
标题翻译： NMR化学位移成像方法
公开(公告)号：US4689568A
公开(公告)日：1987-08-25
申请号：US750475
申请日：1985-07-01
申请人： Shigeru Matsui , Kensuke Sekihara , Hideki Kohno , Takashi Onodera , Hidemi Shiono
发明人： Shigeru Matsui , Kensuke Sekihara , Hideki Kohno , Takashi Onodera , Hidemi Shiono
IPC分类号： G01R33/44 , A61B5/055 , A61B10/00 , G01R33/48 , G01R33/485 , G01R33/561 , G01R33/20
CPC分类号： G01R33/485 , G01R33/5616
摘要： An NMR imaging method which provides a three-dimensional image representative of the two-dimensional distribution of nuclear spin species resolved by chemical shift or the local spectra resolved by two-dimensional location. After the excitation of nuclear spins and the phase-encoding by application of a field gradient G.sub.y, a periodically inverting field gradient G.sub.x is generated to yield a continuous echo train. The echo train is sampled and separated into data of odd-numbered echoes and data of even-numbered echoes which data are in turn reconstructed into two-dimensional data arrays, respectively. The data thus reconstructed are three-dimensional Fourier-transformed.
摘要翻译：提供表示通过化学位移分解的核自旋物质的二维分布的三维图像的NMR成像方法或通过二维位置解析的局部光谱。在核自旋的激励和通过施加场梯度Gy的相位编码之后，产生周期性反转场梯度Gx以产生连续的回波串。回波串被采样并分离成奇数回波的数据和偶数回波的数据，数据又分别被重建成二维数据阵列。这样重建的数据是三维傅里叶变换的。

8. 发明授权

US4939463A Image reconstruction method in NMR imaging 失效
标题翻译： NMR成像中的图像重建方法
公开(公告)号：US4939463A
公开(公告)日：1990-07-03
申请号：US218694
申请日：1988-07-07
申请人： Kensuke Sekihara , Shigeru Matsui , Hideki Kohno
发明人： Kensuke Sekihara , Shigeru Matsui , Hideki Kohno
IPC分类号： A61B10/00 , A61B5/055 , G01R33/44 , G01R33/48 , G01R33/56 , G01R33/561
CPC分类号： G01R33/56554 , G01R33/56
摘要： A method wherein the requirement for the amplitude of the oscillating gradient magnetic field is relaxed by reconstructing an image while using simultaneously echoes S.sub.p (k.sub.x, y) produced in the case where the positive oscillating gradient magnetic field is applied to the object to be tested and echoes S.sub.N (k.sub.x, y) produced in the case where the negative is applied thereto, i.e. by using data points on segments of a trajectory of data points ascending from left to right in the spatial frequency domain and those on segments of a trajectory of data points ascending from right to left. That is, the image M(x, y) is obtained by Fourier-transforming at first the echoes S.sub.p (k.sub.x, k.sub.y) and S.sub.N (k.sub.x, k.sub.y) with respect to k.sub.y, multiplying complex numbers a.sub.1 and a.sub.2 to g.sub.p (k.sub.x, y) and g.sub.N (k.sub.x, y) obtained by this transformation; adding the results thus obtained, i.e. forming g(k.sub.x, y)=a.sub.1 g.sub.p (k.sub.x, y)+a.sub.2 g.sub.N (k.sub.x, y); and finally Fourier-transforming this g(k.sub.x, y) with respect to k.sub.x.

9. 发明授权

US4797616A High speed NMR spectroscopic imaging method 失效
标题翻译：高速NMR光谱成像方法
公开(公告)号：US4797616A
公开(公告)日：1989-01-10
申请号：US151901
申请日：1988-02-03
申请人： Shigeru Matsui , Takashi Onodera , Kensuke Sekihara , Hidemi Shiono , Hideki Kohno
发明人： Shigeru Matsui , Takashi Onodera , Kensuke Sekihara , Hidemi Shiono , Hideki Kohno
IPC分类号： G01R33/32 , A61B5/055 , A61B10/00 , G01R33/44 , G01R33/48 , G01R33/485 , G01R33/20
CPC分类号： G01R33/485
摘要： An NMR spectroscopic imaging method of obtaining separate spin distribution images for respective spectral components of the spectrum of an NMR signal caused by the chemical shift of nuclides of interest in an object includes providing for a transversal magnetization signal of the object placed in a static magnetic field. A position of the signal in a phase domain is translated in a K-space from the origin thereof. Further, the signal is sampled while rotating a position of the signal in the K-space plural times on a certain circle in the K-space by applying a rotating field gradient, thereby to obtain a group of signal data. Signal data trains each of which is composed of signal data present at the same position on the K-space in the signal data group obtained by the sampling during the plural signal rotations, is subjected to Fourier transformations, respectively, thereby effecting a spectral analysis of the NMR signal.
摘要翻译：由对象物质的化学位移引起的核磁共振信号频谱的各频谱分量的分离自旋分布图像的NMR分光成像方法包括提供放置在静磁场中的物体的横向磁化信号。信号在相位域中的位置从其原点在K空间中平移。此外，在通过施加旋转场梯度在K空间中的某个圆上多次旋转K空间中的信号的位置的同时对信号进行采样，从而获得一组信号数据。由多个信号旋转中的采样获得的信号数据组中的与K空间上的相同位置处的信号数据组成的信号数据串分别进行傅里叶变换，从而进行频谱分析 NMR信号。

10. 发明授权

US4733188A NMR imaging method 失效
标题翻译： NMR成像方法
公开(公告)号：US4733188A
公开(公告)日：1988-03-22
申请号：US850113
申请日：1986-04-10
申请人： Kensuke Sekihara , Shigeru Matsui , Hideki Kohno
发明人： Kensuke Sekihara , Shigeru Matsui , Hideki Kohno
IPC分类号： A61B10/00 , A61B5/055 , G01R33/48 , G01R33/561 , G01R33/20
CPC分类号： G01R33/5615 , G01R33/5616
摘要： In imaging methods represented by the echo-planar method, i.e., in a method including a step of measuring the spin echos while applying a fixed gradient magnetic field to an object and applying a gradient field G.sub.Y periodically inverted in sense to the object and a step of obtaining the spin distribution image in the spatial domain by applying two-dimensional Fourier transform to the measured data, measurement is repeated a plurality of times while altering the phase of the applied waveform of G.sub.X, and the spin density image is derived by applying two-dimensional Fourier transform to a plurality of sets of data groups thus obtained.
摘要翻译：在由回波平面方法表示的成像方法中，即在包括测量自旋回波的步骤的方法中，同时向对象施加固定的梯度磁场，并且向对象施加周期性反转的渐变场GY，并且步骤通过对测量数据应用二维傅里叶变换获得空间域中的自旋分布图像，在改变GX的施加波形的相位的同时重复测量多次，并且通过应用两个方法导出自旋密度图像维数傅里叶变换到由此获得的多组数据组。

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