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1. 发明授权

US5017871A Gradient current speed-up circuit for high-speed NMR imaging system 失效
标题翻译：用于高速NMR成像系统的梯度电流加速电路
公开(公告)号：US5017871A
公开(公告)日：1991-05-21
申请号：US407180
申请日：1989-09-14
申请人： Otward M. Mueller , Peter B. Roemer , William A. Edelstein
发明人： Otward M. Mueller , Peter B. Roemer , William A. Edelstein
IPC分类号： G01R33/20 , A61B5/055 , G01R33/385
CPC分类号： G01R33/3852
摘要： A gradient current speed-up circuit, for use in a higher-speed NMR imaging system with a gradient power amplifier and an associated gradient, coil, has a high-voltage power supply which is selectively connected to the associated gradient coil, typical via a plurality of semiconductor switching elements, to supply a pulse of a very high voltage when fast coil rise and fall times are needed. The gradient coil is connected between selected ones of semiconductors devices which are turned on and off in selected patterns, to cause the direction of coil current flow to be determined.

2. 发明授权

US5484985A Radiofrequency ground heating system for soil remediation 失效
标题翻译：射频地面加热系统土壤修复
公开(公告)号：US5484985A
公开(公告)日：1996-01-16
申请号：US291260
申请日：1994-08-16
申请人： William A. Edelstein , Icko T. Iben , Otward M. Mueller , Egidijus E. Uzgiris , Peter B. Roemer
发明人： William A. Edelstein , Icko T. Iben , Otward M. Mueller , Egidijus E. Uzgiris , Peter B. Roemer
IPC分类号： B09C1/06 , E21B36/04 , E21B43/00 , H05B6/62 , H05B6/54
CPC分类号： B09C1/06 , E21B36/04 , E21B43/003 , H05B6/62 , B09C2101/00
摘要： An in-situ method of extracting contaminants from a soil volume comprises applying a radiofrequency (RF) excitation signal to heat the soil with an array of electrodes. The electrodes are inserted into the contaminated volume or inserted into a matrix of holes drilled into the volume. A first row of electrodes is electrically coupled to a shield of a coaxial cable, with a second row electrically coupled to the central conductor of the coaxial cable. RF energy is applied to pairs of electrode rows through the coaxial cable and a matching network is installed in front of the electrode-row pair to maximize power flow into the electrode-row pair. This results in very evenly distributed voltages which results in even heating. A balanced-to-unbalanced transformer (balun) is installed at the input to the matching network to prevent the deposition of RF energy outside the target volume and creation of voltages that could be hazardous to personnel. The electrodes are perforated and connected to collection tubes which collect volatilized contaminant vapors and pass the vapors to a vapor treatment unit for neutralization.
摘要翻译：从土壤体积中提取污染物的原位方法包括施加射频（RF）激发信号以用电极阵列加热土壤。电极被插入到污染的体积中或插入钻孔体积中的孔的矩阵中。第一排电极电耦合到同轴电缆的屏蔽，第二行电耦合到同轴电缆的中心导体。 RF能量通过同轴电缆施加到电极对对，并且匹配网络安装在电极列对的前面，以最大限度地增加流入电极列对的功率。这导致非常均匀的分布电压，这导致均匀的加热。平衡不平衡变压器（平衡 - 不平衡转换器）安装在匹配网络的输入端，以防止射频能量沉积在目标体积之外，并产生可能对人员造成危害的电压。电极被穿孔并连接到收集挥发性污染物蒸汽并将蒸气传递到蒸气处理单元进行中和的收集管中。

3. 发明授权

US4881032A Method of, and apparatus for, NMR spectroscopic metabolite imaging and quantification 失效
标题翻译： NMR光谱代谢物成像和定量的方法和装置
公开(公告)号：US4881032A
公开(公告)日：1989-11-14
申请号：US260633
申请日：1988-10-21
申请人： Paul A. Bottomley , Peter B. Roemer , William A. Edelstein , Otward M. Mueller
发明人： Paul A. Bottomley , Peter B. Roemer , William A. Edelstein , Otward M. Mueller
IPC分类号： A61B5/055 , G01R33/36 , G01R33/48 , G01R33/485
CPC分类号： G01R33/485 , G01R33/3628
摘要： A method for NMR spectroscopy metabolite imaging utilizes the steps of: applying to a desired portion of a sample a pulsed phase-encoding linear magnetic gradient signal in at least one of the three orthogonal dimensions of a Cartesian coordinate set, prior to acquisition of free-induction-decay NMR response signals from the sample portion; substantially eliminating from at least the sample portion eddy current fields induced responsive to the phase-encoding gradient pulses; maximizing the signal-to-noise ratio of the NMR response signals; and displaying the data resulting from Fourier transformation of the received response data. A high-field NMR imaging system is provided with self-shielded gradient coils, to subsantially remove eddy-current effects, and at least one of maximized-SNR antenna, of quadrature-driven volume RF coil and/or surface RF coil types are utilized for both transmission of the excitation RF pulses and reception of the RF response signals. The acquired FID data is filtered and a Fourier transform reconstruction, of dimension d' equal to one greater than the numder d of spatial dimensions to be displayed, is performed.

4. 发明授权

US4631495A Low-noise RF preamplifier (especially for nuclear magnetic resonance system) 失效
标题翻译：低噪声射频前置放大器（特别适用于核磁共振系统）
公开(公告)号：US4631495A
公开(公告)日：1986-12-23
申请号：US730522
申请日：1985-05-06
申请人： Otward M. Mueller , William A. Edelstein
发明人： Otward M. Mueller , William A. Edelstein
IPC分类号： H03F1/26 , H03F3/19 , H03F3/04
CPC分类号： H03F3/19 , H03F1/26
摘要： A low-noise radio-frequency preamplifier, especially suited for use in the reception channel of a nuclear magnetic resonance spectrometer and the like, utilizes a low-noise input stage having a plurality of bipolar junction transistors effectively connected in radio-frequency parallel, but with each of the plurality of parallel bipolar transistors isolated from one another for direct current flow through at least one electrode thereof.
摘要翻译：特别适用于核磁共振光谱仪等的接收通道的低噪声射频前置放大器利用具有多个双极结型晶体管的低噪声输入级，该多个双极结型晶体管以射频平行方式有效连接，但是所述多个并联双极晶体管中的每一个彼此隔离以直流流过其至少一个电极。

5. 发明授权

US5010304A Cryogenically-cooled radio-frequency power amplifier 失效
标题翻译：低温无线射频功率放大器
公开(公告)号：US5010304A
公开(公告)日：1991-04-23
申请号：US431361
申请日：1989-11-03
申请人： Otward M. Mueller , William A. Edelstein
发明人： Otward M. Mueller , William A. Edelstein
IPC分类号： H03F3/60 , H03F19/00
CPC分类号： H03F19/00 , H03F3/601
摘要： A cryogenically-cooled RF power amplifier utilizes a plurality of metal-oxide-semiconductor field-effect transistors configured on a heat sink having at least one surface in contact with a cryogenic fluid, and having input means for coupling RF driving power into the plurality of cryogenically-cooled MOSFETs and output means for coupling an amplified level of RF power from the cooled MOSFETs to an antenna.
摘要翻译：低温冷却RF功率放大器利用配置在具有至少一个与低温流体接触的表面的散热器上的多个金属氧化物半导体场效应晶体管，并且具有用于将RF驱动功率耦合到多个低温冷却MOSFET和用于将放大的RF功率从冷却的MOSFET耦合到天线的输出装置。

6. 发明授权

US4680548A Radio frequency field coil for NMR 失效
标题翻译：用于NMR的射频场线圈
公开(公告)号：US4680548A
公开(公告)日：1987-07-14
申请号：US884674
申请日：1986-07-16
申请人： William A. Edelstein , John F. Schenck , Otward M. Mueller , Cecil E. Hayes
发明人： William A. Edelstein , John F. Schenck , Otward M. Mueller , Cecil E. Hayes
IPC分类号： G01N33/00 , G01R33/34 , G01R33/36 , G01R33/20
CPC分类号： G01R33/3628 , G01R33/34076
摘要： In one embodiment, referred to as the "high-pass" version, the radio frequency (RF) coil is made up of two conductive loop elements, each including serially-connected capacitors. The loop elements are electrically interconnected by axial conductive segments having inherent inductances associated therewith. Electrically, the coil can be viewed as a slow wave delay line structure wrapped around a cylinder and connected to itself. The coil can be energized by connecting a source of RF power across one of the capacitors in the loop elements. In another embodiment, termed the "band-pass" version, the axial conductive segments, as well as the conductive loop elements, are provided with capacitors.
摘要翻译：在一个实施例中，被称为“高通”版本，射频（RF）线圈由两个导电环路元件组成，每个包括串联连接的电容器。环形元件通过具有与其相关联的固有电感的轴向导电段电互连。电气地，线圈可以被看作是围绕圆筒缠绕并连接到其自身的慢波延迟线结构。通过在环路元件中的一个电容器之间连接RF电源来激励线圈。在称为“带通”版本的另一实施例中，轴向导电段以及导电环路元件设置有电容器。

7. 发明授权

US5236039A Balanced-line RF electrode system for use in RF ground heating to recover oil from oil shale 失效
标题翻译：平衡线RF电极系统，用于RF地面加热，以从油页岩中回收油
公开(公告)号：US5236039A
公开(公告)日：1993-08-17
申请号：US899839
申请日：1992-06-17
申请人： William A. Edelstein , Harold J. Vinegar , Chia-Fu Hsu , Otward M. Mueller
发明人： William A. Edelstein , Harold J. Vinegar , Chia-Fu Hsu , Otward M. Mueller
IPC分类号： E21B36/04 , E21B43/24 , E21B43/30
CPC分类号： E21B43/30 , E21B36/04 , E21B43/2401
摘要： An in-situ method of extracting oil from a hydrocarbon bearing layer such as oil-shale or tar sands lying beneath a surface layer comprises applying a radiofrequency excitation signal to the hydrocarbon bearing layer through a system of electrodes. The electrodes are inserted into a matrix of holes drilled through the surface layer and into the hydrocarbon bearing layer. A coaxial line extending through the surface layer is connected to the electrodes extending into the hydrocarbon bearing layer. The electrodes have a length that is an integral number of quarter wavelengths of the radiofrequency energy. A matching network connected between the coaxial cable and a respective one of the electrodes maximizes the power flow into each electrode. The electrodes are excited uniformly in rows and as a "balanced-line" RF array where adjacent rows of electrodes are 180.degree. out of phase. This method does not produce substantial heating of the surface layer or the region surrounding the producing layer, and concentrates most of its power in the hydrocarbon bearing layer.
摘要翻译：从位于表面层下方的油页岩或焦油砂等含烃层提取油的原位方法包括通过电极系统向载流层施加射频激发信号。将电极插入穿过表面层并进入含烃层的孔的矩阵中。延伸穿过表面层的同轴线连接到延伸进入承载层的电极。电极的长度是射频能量的四分之一波长的整数。连接在同轴电缆和相应电极之间的匹配网络使流入每个电极的功率流最大化。电极被均匀地激发成行，并且作为相邻行电极相位相差180°的“平衡线”RF阵列。该方法不会对生产层周围的表面层或区域产生实质的加热，并且将其大部分功率集中在含烃层中。

8. 发明授权

US4879515A Double-sided RF shield for RF coil contained within gradient coils of NMR imaging device 失效
标题翻译：用于RF线圈的双面RF屏蔽包含在NMR成像装置的梯度线圈内
公开(公告)号：US4879515A
公开(公告)日：1989-11-07
申请号：US288344
申请日：1988-12-22
申请人： Peter B. Roemer , William A. Edelstein
发明人： Peter B. Roemer , William A. Edelstein
IPC分类号： G01R33/422
CPC分类号： G01R33/422
摘要： A double-sided RF shield, for use between a set of gradient coils and an RF coil, is a hollow member formed of a conductor-dielectric-conductor laminate. Each conductor is a sheet divided into first and second opposed half-cylinders, each having a plurality of conductive streamline loop portions with a series of nonconductive cut lines formed therebetween, with each of the cut lines being parallel to the RF current. Each of the loops is separated into a "C"-shaped conductive portion along at least one "radial" line cut in each half-cylinder. The cut lines are substantially opposite to one another on opposite surfaces of the half-cylinders, to form a loop with a pair of series capacitances of maximized value, which shield the RF current, yet pass gradient magnetic fields in all three mutually orthogonal directions of a Cartesian coordinate system.
摘要翻译：在一组梯度线圈和RF线圈之间使用的双面RF屏蔽是由导体 - 电介质导体层叠体形成的中空构件。每个导体是分成第一和第二相对的半圆柱体的片，每个具有多个导电流线环部分，其间形成有一系列非导电切割线，每条切割线平行于RF电流。沿着每个半圆筒中切割的至少一个“径向”线将每个环分成“C”形导电部分。切割线在半圆柱的相对表面上基本上彼此相反，以形成具有最大值的一对串联电容的环路，其屏蔽RF电流，但在所有三个相互正交的方向上通过梯度磁场笛卡尔坐标系。

9. 发明授权

US4910462A Etched Z-axis gradient coils for NMR system 失效
标题翻译：用于NMR系统的蚀刻Z轴梯度线圈
公开(公告)号：US4910462A
公开(公告)日：1990-03-20
申请号：US344642
申请日：1989-04-28
申请人： Peter B. Roemer , William A. Edelstein
发明人： Peter B. Roemer , William A. Edelstein
IPC分类号： G01R33/3815 , A61B5/055 , G01R33/38 , G01R33/385 , H01F7/20
CPC分类号： G01R33/385
摘要： An etched coil for producing a Z-axis magnetic field gradient responsive to flow of a current I, has a number N of pairs of elongated conductive strips, with each strip of a pair being positioned substantially symmetrically about a central insulative cutline, and insulatively spaced from all other strips, and with a first strip being insulatively severed into first and third strip portions; the strips are connected so that current flows into a first one of said strips and then between each successive pair of the strips until the current flows out of a last one of the strips. There are interconnectors used, in each i-th pair, where 1

10. 发明授权

US4885539A Volume NMR coil for optimum signal-to-noise ratio 失效
标题翻译：体积NMR线圈，以获得最佳的信噪比
公开(公告)号：US4885539A
公开(公告)日：1989-12-05
申请号：US202624
申请日：1988-06-06
申请人： Peter B. Roemer , Paul A. Bottomley , William A. Edelstein
发明人： Peter B. Roemer , Paul A. Bottomley , William A. Edelstein
IPC分类号： A61B5/055 , G01R33/34 , H01F7/20
CPC分类号： G01R33/34046
摘要： A RF volume coil with optimized signal-to-noise ratio, for NMR use, has a reduced length L.sub.c, which is between about 0.3r.sub.s and about 1.5r.sub.s, where r.sub.s is the radius of a sample-to-be-investigated, contained within the cylindrical volume coil, with the volume coil radius r.sub.c being between about 1.0r.sub.s and about 1.6r.sub.s. the "short" volume coil has an improved SNR for a voxel located substantially on the central plane of the coil, relative to the SNR of a "normal"-lenth volume coil with L.sub.c .gtoreq.4r.sub.s.

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