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公开(公告)号：US20130082709A1
公开(公告)日：2013-04-04
申请号：US13584126
申请日：2012-08-13
申请人： Alan R. RATH , Wai Ha WONG , Weston A. ANDERSON
发明人： Alan R. RATH , Wai Ha WONG , Weston A. ANDERSON
IPC分类号： G01R33/48 , G01R33/341
CPC分类号： G01R33/34076 , G01R33/5616
摘要： A magnetic resonance imaging (MRI) apparatus comprises a plurality of cylindrical electromagnetic coils arranged in a coaxial configuration around a sample region. The coils are used to capture resonance signals from a sample at different times according to a geometric echo effect. The measurements can then be combined to produce an MRI signal.
摘要翻译： 磁共振成像（MRI）装置包括以样品区域周围的同轴构造布置的多个圆柱形电磁线圈。 线圈用于根据几何回波效应在不同时间从样品捕获共振信号。 然后可以将测量结合以产生MRI信号。
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公开(公告)号：US07791339B2
公开(公告)日：2010-09-07
申请号：US11899706
申请日：2007-09-07
IPC分类号： G01V3/00
CPC分类号： G01R33/3657 , G01R33/035 , G01R33/34023 , G01R33/34053 , G01R33/34061 , G01R33/34092 , G01R33/341 , G01R33/3642 , G01R33/3671
摘要： A multimode resonator resonating at two or more frequencies is operated at cryogenic temperatures and composed of a superconducting material or a normal metal with a superconducting section serving as a RF superconducting switch. The multimode resonator is coupled to a NMR spectrometer and a RF switch power source, wherein its one frequency is selected to correspond to the operating frequency of the NMR spectrometer and at least a second frequency is tuned to a frequency of RF switch power source, unrelated to the spectrometer frequency, therefore power at this frequency does not perturb the operation of the spectrometer. When activated, the RF switch power source induces a current sufficient to approach or exceeds the critical current in one or more sections of the superconducting material of the multimode resonator, thereby increasing its resistance and reducing the Q factor of the multimode resonator.
摘要翻译： 以两个或更多个频率谐振的多模谐振器在低温下工作，并由超导材料或具有用作RF超导开关的超导部分的普通金属组成。 多模谐振器耦合到NMR光谱仪和RF开关电源，其中其一个频率被选择为对应于NMR光谱仪的工作频率，并且至少第二频率被调谐到RF开关电源的频率，不相关 对于光谱仪频率，因此在该频率下的功率不会扰乱光谱仪的操作。 当激活时，RF开关电源在多模谐振器的超导材料的一个或多个部分中引起足以接近或超过临界电流的电流，从而增加其电阻并降低多模谐振器的Q因子。
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公开(公告)号：US07701217B2
公开(公告)日：2010-04-20
申请号：US12187691
申请日：2008-08-07
IPC分类号： G01V3/00
CPC分类号： G01R33/34053 , G01R33/34007 , G01R33/34023 , G01R33/34069 , G01R33/34092 , G01R33/3628
摘要： RF electric fields produced by electric potential differences in NMR probe coil windings may penetrate the NMR sample and sample tube causing sensitivity loss and noise in NMR spectroscopy. Counter-wound spiral coils placed on the opposite surfaces of a planar substrate or on two adjacent planar substrates produce electric potentials that minimize the electric field over the sample region, thereby increasing the sensitivity of the NMR probe. Alternatively counter-wound spiral coils placed adjacent to each other on the outer surface of two concentric cylindrical surfaces that surround the NMR sample minimize the electric field over the sample region. The electric potential of the spiral coils is reduced by adjusting a length of at least one coil.
摘要翻译： 通过NMR探针线圈绕组中的电位差产生的RF电场可能渗透NMR样品和样品管，导致NMR光谱中的灵敏度损失和噪声。 放置在平面基板或两个相邻平面基板的相对表面上的反卷绕螺旋线圈产生使得样品区域上的电场最小化的电势，从而增加NMR探针的灵敏度。 或者在围绕NMR样品的两个同心圆柱形表面的外表面上彼此相邻放置的反卷绕螺旋线圈使得样品区域上的电场最小化。 通过调节至少一个线圈的长度来减小螺旋线圈的电位。
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公开(公告)号：US20100033184A1
公开(公告)日：2010-02-11
申请号：US12187691
申请日：2008-08-07
IPC分类号： G01R33/341
CPC分类号： G01R33/34053 , G01R33/34007 , G01R33/34023 , G01R33/34069 , G01R33/34092 , G01R33/3628
摘要： RF electric fields produced by electric potential differences in NMR probe coil windings may penetrate the NMR sample and sample tube causing sensitivity loss and noise in NMR spectroscopy. Counter-wound spiral coils placed on the opposite surfaces of a planar substrate or on two adjacent planar substrates produce electric potentials that minimize the electric field over the sample region, thereby increasing the sensitivity of the NMR probe. Alternatively counter-wound spiral coils placed adjacent to each other on the outer surface of two concentric cylindrical surfaces that surround the NMR sample minimize the electric field over the sample region. The electric potential of the spiral coils is reduced by adjusting a length of at least one coil.
摘要翻译： 通过NMR探针线圈绕组中的电位差产生的RF电场可能渗透NMR样品和样品管，导致NMR光谱中的灵敏度损失和噪声。 放置在平面基板或两个相邻平面基板的相对表面上的反卷绕螺旋线圈产生使得样品区域上的电场最小化的电势，从而增加NMR探针的灵敏度。 或者在围绕NMR样品的两个同心圆柱形表面的外表面上彼此相邻放置的反卷绕螺旋线圈使得样品区域上的电场最小化。 通过调节至少一个线圈的长度来减小螺旋线圈的电位。
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公开(公告)号：US20090302846A1
公开(公告)日：2009-12-10
申请号：US11899706
申请日：2007-09-07
IPC分类号： G01R33/48
CPC分类号： G01R33/3657 , G01R33/035 , G01R33/34023 , G01R33/34053 , G01R33/34061 , G01R33/34092 , G01R33/341 , G01R33/3642 , G01R33/3671
摘要： A multimode resonator resonating at two or more frequencies is operated at cryogenic temperatures and composed of a superconducting material or a normal metal with a superconducting section serving as a RF superconducting switch. The multimode resonator is coupled to a NMR spectrometer and a RF switch power source, wherein its one frequency is selected to correspond to the operating frequency of the NMR spectrometer and at least a second frequency is tuned to a frequency of RF switch power source, unrelated to the spectrometer frequency, therefore power at this frequency does not perturb the operation of the spectrometer. When activated, the RF switch power source induces a current sufficient to approach or exceeds the critical current in one or more sections of the superconducting material of the multimode resonator, thereby increasing its resistance and reducing the Q factor of the multimode resonator.
摘要翻译： 以两个或更多个频率谐振的多模谐振器在低温下工作，并由超导材料或具有用作RF超导开关的超导部分的普通金属组成。 多模谐振器耦合到NMR光谱仪和RF开关电源，其中其一个频率被选择为对应于NMR光谱仪的工作频率，并且至少第二频率被调谐到RF开关电源的频率，不相关 对于光谱仪频率，因此在该频率下的功率不会扰乱光谱仪的操作。 当激活时，RF开关电源在多模谐振器的超导材料的一个或多个部分中引起足以接近或超过临界电流的电流，从而增加其电阻并降低多模谐振器的Q因子。
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公开(公告)号：US5799951A
公开(公告)日：1998-09-01
申请号：US754946
申请日：1996-11-21
CPC分类号： F16J15/43
摘要： A rotating sealing device for sealing between a wall separating two mediums under substantially different pressure and a rotatable shaft utilizes a combination of a liquid meatal seal comprising at least one liquid metal ring and a shield means which prevents contamination of the metal ring by gases coming into contact with the liquid metal. Magnetic fluid seal, a ring of an oil material, or inert gas may be used as a shield to protect the liquid metal.
摘要翻译： 用于密封在基本上不同的压力下分离两种介质的壁和旋转轴之间的旋转密封装置利用包括至少一个液态金属环的液体肉类密封和防止金属环被气体污染的屏蔽装置的组合 与液态金属接触。 可以使用磁流体密封，油料环或惰性气体作为屏蔽来保护液态金属。
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公开(公告)号：US5565778A
公开(公告)日：1996-10-15
申请号：US461559
申请日：1995-06-05
申请人： William W. Brey , Weston A. Anderson , Wai H. Wong , Luiz F. Fuks , Vincent Y. Kotsubo , Richard S. Withers
发明人： William W. Brey , Weston A. Anderson , Wai H. Wong , Luiz F. Fuks , Vincent Y. Kotsubo , Richard S. Withers
CPC分类号： G01R33/3628 , G01R33/34 , G01R33/34007 , H01G4/40 , G01R33/34023 , G01R33/34092 , G01R33/5604
摘要： A resonant coil for nuclear magnetic spectroscopy and microscopy is provided, in which the coil is in the form of nested, interrupted loops of a conductive material forming a distributed inductive element and having a plurality of capacitive elements with capacitance distributed over the periphery of the loops. The coil is preferably formed as a thin film of a superconductive material on an electrically nonconductive substrate.
摘要翻译： 提供了用于核磁谱和显微镜的共振线圈，其中线圈是形成分布式感应元件的导电材料的嵌套的中断环路的形式，并且具有多个电容元件，电容分布在环的周边 。 线圈优选地在非导电衬底上形成为超导材料的薄膜。
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公开(公告)号：US4878235A
公开(公告)日：1989-10-31
申请号：US160223
申请日：1988-02-25
申请人： Weston A. Anderson
发明人： Weston A. Anderson
摘要： Several different embodiments of high-intensity rotating-anode X-ray are shown which use a liquid or fluid-cooled rotating-anode. No ferrofluid-type rotating joints or O-ring gasket-type seals are required so that the interior of the tube maintains a high vacuum without pumping. A bellows permits mechanical coupling to interior structures of the tube while providing a completely vacuum tight enclosure. All joints may be hard soldered or brazed together so the entire system can be baked at a high temperature during pumpdown.
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公开(公告)号：US4562900A
公开(公告)日：1986-01-07
申请号：US684232
申请日：1984-12-20
CPC分类号： G10K11/30
摘要： A lens system for directing and focussing acoustic energy from an array of acoustic transducers on a small target can be made lightweight, low in absorption and dispersion by incorporating plastic Fresnel lenses with prisms into a monolithic tray of the same plastic with one lens for each transducer.
摘要翻译： 用于引导和聚焦来自小目标上的声换能器阵列的声能的透镜系统可以通过将具有棱镜的塑料菲涅尔透镜结合到同一塑料的整体式托盘中，使每个换能器具有一个透镜，从而使其重量轻，吸收和散射低 。
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公开(公告)号：US5767677A
公开(公告)日：1998-06-16
申请号：US694886
申请日：1996-08-09
申请人： Weston A. Anderson
发明人： Weston A. Anderson
CPC分类号： G01R33/3628 , G01R33/34092
摘要： Radiation damping effects in NMR are compensated by splitting the amplified NMR signal induced in the main probe coil to obtain a correction signal, phase shifting the correction signal to obtain a feedback signal and impressing the feedback signal onto the sample through means independent of the main probe coil.
摘要翻译： 通过分离在主探针线圈中感应的放大NMR信号来补偿NMR中的辐射阻尼效应，以获得校正信号，将校正信号相移以获得反馈信号，并通过独立于主探针的装置将反馈信号施加到样品上 线圈
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