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1. 发明申请

US20130063142A1 Multiple Coils for NMR Well-logging Measurements 有权
标题翻译：用于NMR测井测量的多个线圈
公开(公告)号：US20130063142A1
公开(公告)日：2013-03-14
申请号：US13228715
申请日：2011-09-09
申请人： Timothy Hopper , David G. Cory , Yi-Qiao Song , Martin D. Hurlimann
发明人： Timothy Hopper , David G. Cory , Yi-Qiao Song , Martin D. Hurlimann
IPC分类号： G01V3/00
CPC分类号： G01V3/32 , G01N24/081 , G01R33/3415
摘要： An NMR apparatus disposed in a wellbore and having an array of two or more NMR sensors located at substantially the same axial position on the NMR apparatus and having different directional sensitivities is used to acquire an NMR signal from at least two of the two or more NMR sensors. The NMR signals are combined to obtain borehole information. The borehole information may include an azimuthal image of the formation surrounding the borehole. The azimuthal image may be a formation porosity image, a formation bound fluid image, a T2 distribution image, a T2 log mean image, a formation permeability image, or a formation fluid viscosity image. If two or more pre-amplifiers and receiver circuitry are also provided, the NMR signals may be combined prior to passing through the pre-amplifiers and receiver circuitry to improve the signal to noise ratio of the total signal from the desired sample space.
摘要翻译：设置在井筒中并且具有位于NMR装置上基本上相同的轴向位置且具有不同方向灵敏度的两个或更多个NMR传感器的阵列的NMR装置用于从两个或更多个NMR中的至少两个获得NMR信号传感器。 NMR信号被组合以获得井眼信息。钻孔信息可以包括围绕钻孔的地层的方位角图像。方位角图像可以是地层孔隙度图像，地层结合流体图像，T2分布图像，T2对数平均图像，地层渗透率图像或地层流体粘度图像。如果还提供两个或更多个前置放大器和接收器电路，则可以在通过前置放大器和接收器电路之前组合NMR信号，以提高来自期望采样空间的总信号的信噪比。

2. 发明授权

US5394088A NMR probe for imaging small samples 失效
标题翻译：用于成像小样品的NMR探针
公开(公告)号：US5394088A
公开(公告)日：1995-02-28
申请号：US194112
申请日：1994-02-08
申请人： David G. Cory
发明人： David G. Cory
IPC分类号： G01R33/30 , G01R33/34 , G01V3/00
CPC分类号： G01R33/34 , G01R33/30
摘要： A small sample imaging apparatus replaces the dewar which normally passes along the axis of an NMR imaging probe. The small sample imaging apparatus incorporates an integral RF coil and capacitor resonant circuit. The coil and capacitor are positioned adjacent to each other and remotely at the end of a projecting stalk. Stray inductance effects are thereby avoided and the stalk physically positions the resonant circuit at substantially the properly centered location. The stalk which positions the coil and capacitor may be formed from a length of rigid coaxial cable which carried RF energy to the resonant circuit. When large samples are imaged, the conventional probe coil insert can be utilized in the normal manner. However, when smaller samples are images, the adapter can be attached to the probe and the adaptor resonant circuit can be utilized.
摘要翻译：小样本成像装置代替通常沿着NMR成像探针的轴线通过的杜瓦瓶。小型样本成像装置包含一个整体RF线圈和电容谐振电路。线圈和电容器彼此相邻定位并远离突出的茎的末端。从而避免了杂散电感效应，并且该物体将谐振电路物理地定位在基本正确居中的位置。定位线圈和电容器的杆可以由承载RF能量的谐振电路的刚性同轴电缆的长度形成。当大样本被成像时，常规探针线圈插入件可以以正常方式使用。然而，当较小的样本是图像时，适配器可以附接到探针，并且可以利用适配器谐振电路。

3. 发明授权

US5208536A Method for slice selection in an NMR MAS solids imaging system 失效
标题翻译：在NMR MAS固体成像系统中切片选择的方法
公开(公告)号：US5208536A
公开(公告)日：1993-05-04
申请号：US724876
申请日：1991-07-02
申请人： David G. Cory
发明人： David G. Cory
IPC分类号： G01R33/54
CPC分类号： G01R33/4816
摘要： A multiple-pulse RF pulse sequence applied in the presence of an oscillating magnetic field gradient enables slice selection in a magic angle spinning nuclear magnetic resonance solids imaging system. Slice selectivity is produced by a series of RF pulses, some of which introduce a nutation that coherently adds for only a selected slice plane of the sample and averages to zero in other areas and some of which average certain gradient-induced modulations so that only those object areas in the selected slice contribute to the output. The pulse train is applied in a manner synchronous with rotor rotation so that rotation induced modulations average to zero over one or more rotor rotation periods.
摘要翻译：在存在振荡磁场梯度的情况下应用的多脉冲RF脉冲序列使得能够在魔角旋转核磁共振固体成像系统中进行切片选择。切片选择性由一系列RF脉冲产生，其中一些引入了仅对样品的选定切片平面相干地添加的章动，并且在其它区域中平均为零，其中一些平均为某些梯度诱导的调制，使得仅那些所选切片中的对象区域有助于输出。脉冲串以与转子旋转同步的方式施加，使得在一个或多个转子旋转周期上的旋转感应调制平均为零。

4. 发明授权

US5343151A Method for automatically shimming a high resolution NMR magnet 失效
标题翻译：自动匀场高分辨率NMR磁铁的方法
公开(公告)号：US5343151A
公开(公告)日：1994-08-30
申请号：US29906
申请日：1993-03-11
申请人： David G. Cory , Peter Sprenger
发明人： David G. Cory , Peter Sprenger
IPC分类号： G01R33/3875 , G01V3/00
CPC分类号： G01R33/3875
摘要： A plurality of measurements are made with a probe containing a material sample with a known frequency spectrum. The probe is positioned in one spot in the magnet bore in the presence of a field gradient along a predetermined axis. Prior to each measurement, the gradient strength is increased by a predetermined constant amount. The resulting measurement values are mathematically manipulated to yield a set of values which can be used to set the shim coil currents based on known equations for the field generated by each shim coil. The method can be used with a material sample with a simple NMR spectrum or a complex NMR spectrum. If a sample with a complex NMR spectrum is employed in the measurement, the spectral complexity can be removed by deconvolution during the manipulation of the measurement values.
摘要翻译：使用包含具有已知频谱的材料样品的探针进行多次测量。在沿着预定轴的场梯度的存在下，探针定位在磁体孔中的一个点中。在每次测量之前，梯度强度增加预定的恒定量。所得到的测量值在数学上被操纵以产生可以用于基于由每个垫片线圈产生的场的已知方程来设置垫片线圈电流的一组值。该方法可与具有简单NMR光谱或复合NMR光谱的材料样品一起使用。如果在测量中采用具有复杂NMR光谱的样品，则可以在操作测量值期间通过去卷积去除光谱复杂度。

5. 发明授权

US5323113A NMR probe which includes B1, gradient coils 失效
标题翻译： NMR探头，包括B1，梯度线圈
公开(公告)号：US5323113A
公开(公告)日：1994-06-21
申请号：US30693
申请日：1993-03-12
申请人： David G. Cory , Frank H. Laukien , Werner E. Maas
发明人： David G. Cory , Frank H. Laukien , Werner E. Maas
IPC分类号： G01R33/34 , G01V3/00
CPC分类号： G01R33/34069 , G01R33/34061
摘要： An NMR probe is designed to generate both a homogeneous RF field over the sample volume and, alternatively, a "radial" field comprising two orthogonal gradient fields generated simultaneously in the transverse plane or a linear gradient field. The homogeneous field is generated by means of a known homogeneous coil construction, such as a Helmholtz coil or modified Helmholtz coil. The radial field can be generated by means of an inverted Helmholtz coil, either modified or unmodified, and the linear field can be generated by a Golay type coil, which coils are positioned coaxially with the homogeneous coil. The two coils are connected in parallel to the RF signal generator and switching can be accomplished either by means of an active switch or by detuning one of the coil resonant circuits when the other coil is in use.
摘要翻译： NMR探针被设计成在样本体积上产生均匀的RF场，或者可选地，包括在横向平面中同时产生的两个正交梯度场或线性梯度场的“径向”场。均匀场通过已知的均匀线圈结构产生，例如亥姆霍兹线圈或改进的亥姆霍兹线圈。径向场可以通过反转的亥姆霍兹线圈产生，其被修改或未修改，并且线性场可以由Golay型线圈产生，该线圈与均匀线圈同轴地定位。两个线圈并联连接到RF信号发生器，并且切换可以通过有源开关来实现，或者当使用另一个线圈时使线圈谐振电路中的一个失谐。

6. 发明授权

US5317263A Method for creating a z-rotation using radial pulses in NMR experiments involving coherence transformations 失效
标题翻译：在涉及相干转换的NMR实验中使用径向脉冲创建z旋转的方法
公开(公告)号：US5317263A
公开(公告)日：1994-05-31
申请号：US32612
申请日：1993-03-17
申请人： David G. Cory , Werner E. Maas
发明人： David G. Cory , Werner E. Maas
IPC分类号： G01R33/46 , G01V3/00
CPC分类号： G01R33/4608
摘要： A composite RF pulse for NMR experiments is created by applying to a sample a radial pulse followed by a .pi. homogeneous pulse. The radial pulse has a uniform RF field strength throughout the sample and a phase relative to the detection coil phase with a spatial dependence such that all possible phase differences are equally represented throughout the sample. The composite pulse converts the radial RF pulse into a spatially-varying z rotation. The creation of a spatially-varying composite z pulse based on a radial pulse allows for a simple and direct application of a radial pulse in a manner analogous to many known B.sub.0 gradient NMR experiments (such as multiple-quantum filters, quadrature detection, and solvent suppression).
摘要翻译：用于核磁共振实验的复合RF脉冲是通过向样本施加径向脉冲，然后是pi均匀脉冲而产生的。径向脉冲在整个采样中具有均匀的RF场强，并且具有相对于具有空间依赖性的检测线圈相位的相位，使得在整个样本中均等地表示所有可能的相位差。复合脉冲将辐射RF脉冲转换成空间变化的z旋转。基于径向脉冲的空间变化的复合z脉冲的创建允许以类似于许多已知的B0梯度NMR实验（例如多量子滤波器，正交检测和溶剂）的方式简单且直接地施加径向脉冲抑制）。

7. 发明授权

US5260654A Technique for amplitude alignment of NMR spectrometer using multiple pulse sequence that is independent of RF inhomogeneity 失效
标题翻译：使用独立于RF不均匀性的多个脉冲序列的NMR光谱仪的幅度比对技术
公开(公告)号：US5260654A
公开(公告)日：1993-11-09
申请号：US860449
申请日：1992-03-30
申请人： David G. Cory
发明人： David G. Cory
IPC分类号： G01R33/32 , G01R33/46 , G01R33/565 , G01N33/20
CPC分类号： G01R33/56563 , G01R33/4616 , G01R33/246
摘要： The quadrature channels of an RF generator in an NMR spectrometer are aligned relative to one another by applying pulse sets to pairs of channels that are 180.degree. out of phase. The effect of the pulses in one channel is the opposite of the pulses in the other channel. As a result, the magnetization of the sample returns to the direction in which it started when the amplitudes of the pulses applied to each channel are equal. The magnetization returns to the initial direction even in the presence of RF inhomogeneities. The characteristic magnetization pattern can be easily observed and used to adjust the relative pulse amplitudes equal and the absolute pulse amplitudes to .pi./2.
摘要翻译： NMR光谱仪中的RF发生器的正交通道通过将相对于180°异相的通道对施加脉冲组而彼此对准。一个通道中的脉冲的影响与另一个通道中的脉冲相反。结果，当施加到每个通道的脉冲的幅度相等时，样品的磁化返回到其开始的方向。即使存在RF不均匀性，磁化也恢复到初始方向。可以容易地观察到特征磁化模式，并用于将相对脉冲幅度相等，将绝对脉冲幅度调整为pi / 2。

8. 发明授权

US5229718A Method for increasing resolution in solid-state NMR spectra of abundant nuclei 失效
标题翻译：用于增加固体核固体核磁共振光谱分辨率的方法
公开(公告)号：US5229718A
公开(公告)日：1993-07-20
申请号：US642396
申请日：1991-01-17
申请人： David G. Cory
发明人： David G. Cory
IPC分类号： G01R33/46
CPC分类号： G01R33/4641
摘要： A multiple-pulse RF pulse sequence reduces homonuclear dipolar coupling more efficiently relative to other known pulse sequences and is relatively insensitive to inhomogeneous RF fields, pulse imperfections and transmitter misadjustments so that it can be used on less sophisticated instruments and does not require long setup times. The inventive RF pulse sequence is constructed from selected sets of known six-pulse cycles called dipolar decoupled inversion pulses or composite inversion pulses. The dipolar decoupled inversion pulses are, in turn, constructed from standard solid echo pulse pairs. The six-pulse cycles are selected so that zero-order term of the average dipolar Hamiltonian is zero.

9. 发明授权

US5227724A Pulsed-gradient spin diffusion NMR method 失效
标题翻译：脉冲梯度自旋扩散NMR法
公开(公告)号：US5227724A
公开(公告)日：1993-07-13
申请号：US710848
申请日：1991-06-06
申请人： David G. Cory , Joel B. Miller , Allen N. Garroway
发明人： David G. Cory , Joel B. Miller , Allen N. Garroway
IPC分类号： G01R33/563
CPC分类号： G01R33/56341
摘要： A method is provided for measuring the distribution of the extent of molear transport along two orthogonal directions, and further for measuring the anisotropy of molecular transport. For a sample which consists of compartments which contain mobile spins, such as round or cylindrical micelles, the distribution of compartment eccentricities can be calculated from this measurement. This method enables the anisotropy of molecular transport to be determined for a sample independently of any bulk orientation within the sample and thus the anisotropy of local geometries can be determined.
摘要翻译：提供了一种用于测量沿着两个正交方向的分子传输程度的分布的方法，并且还用于测量分子转运的各向异性。对于由包含流动自旋的隔室（例如圆形或圆柱形胶束）组成的样品，可以从该测量中计算隔室偏心率的分布。该方法能够独立于样品内的任何体积取向而确定样品的分子转运的各向异性，因此可以确定局部几何形状的各向异性。

10. 发明授权

US5214381A Method for selectively exciting nuclear spins in a radio-frequency field with predetermined strength 失效
标题翻译：在具有预定强度的射频场中选择性地激发核自旋的方法
公开(公告)号：US5214381A
公开(公告)日：1993-05-25
申请号：US860685
申请日：1992-03-30
申请人： David G. Cory
发明人： David G. Cory
IPC分类号： G01R33/46 , G01R33/483
CPC分类号： G01R33/4831 , G01R33/4616
摘要： In an NMR spectrometer, nuclear spins are subjected to a radio-frequency (RF) pulse sequence consisting of repeating cycles, each having a first and a second pulse set. The first pulse set generates a first large-amplitude rotation of the spins in which the angle through which the spins rotate varies with RF field strength. The second pulse set generates a second rotation which has an axis orthogonal to the first rotation axis and the angle through which the spins rotate is independent of the RF field strength. When the nuclear spins are placed in a non-homogeneous RF field and the above pulse sequence is applied, those spins which are located in an area where the RF field strength causes the first pulse set to rotate the spins through an angle which is a multiple of 2 .pi., the second, uniform rotation accumulates with each repetition of the first and second pulse sets in order to selectively excite those spins.
摘要翻译：在NMR光谱仪中，核自旋受到由重复循环组成的射频（RF）脉冲序列，每个重复循环具有第一和第二脉冲集。第一脉冲组产生自旋的第一大振幅旋转，其中自旋旋转的角度随RF场强度而变化。第二脉冲组产生具有与第一旋转轴正交的轴的第二旋转，并且自旋旋转的角度与RF场强无关。当核自旋被放置在非均匀RF场中并且施加上述脉冲序列时，位于RF场强度引起第一脉冲组的区域中的那些自旋将自旋旋转一个多个角度的2π，第二均匀旋转与第一和第二脉冲组的每次重复累积，以选择性地激发那些自旋。

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