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公开(公告)号：US6118274A
公开(公告)日：2000-09-12
申请号：US127961
申请日：1998-08-03
CPC分类号： G01R33/34053 , G01R33/34076 , G01R33/3678 , G01R33/34092
摘要： An NMR probehead is proposed having a generally cylindrical casing extending along a probehead axis. The NMR probehead can be inserted into the room temperature bore of an NMR spectrometer magnet providing, in a measurement region, a homogeneous static magnetic field along the probehead axis. The NMR probehead comprises a cylindrical radio frequency (RF) resonator oriented along a resonator axis and generating essentially homogeneous RF magnetic fields transverse to the resonator axis. In accordance with the invention, the angle between the probehead axis and the resonator axis is different from 0.degree.. In this manner, the inclination of the resonator does not affect the useful RF magnetic field and the signal to noise ratio of the received NMR signal is independent of the inclination angle.
摘要翻译： 提出了具有沿着探头轴线延伸的大致圆柱形壳体的NMR探针头。 NMR探针头可插入NMR光谱仪磁体的室温孔中，在测量区域中提供沿着探头轴线的均匀静磁场。 NMR探针头包括沿着谐振器轴定向的圆柱形射频（RF）谐振器，并且产生横向于谐振器轴线的基本均匀的RF磁场。 根据本发明，探头轴与谐振器轴之间的角度与0°不同。 以这种方式，谐振器的倾斜度不影响有用的RF磁场，并且接收的NMR信号的信噪比与倾斜角无关。
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公开(公告)号：US07446528B2
公开(公告)日：2008-11-04
申请号：US10525932
申请日：2003-08-29
CPC分类号： G01R33/34046
摘要： A radio frequency (RF) coil array is used in resonance imaging and/or analysis of a subject located within a cylindrical space in which a magnetic field is operatively applied in an axial direction (z). The coil array comprises a plurality of coil elements (10, 11, 12, 13) angled relative to each other about the axis of the cylindrical space, each coil element having a pair of main conductors extending generally parallel to the direction of the magnetic field and located on diametrically opposite sides of the cylindrical space, and a pair of connection conductors connected between respective ends of the main conductors. Each coil element has its maximum sensitivity near the centre of the cylindrical space, so that the subject under study is located in a region of maximum sensitivity.
摘要翻译： 射频（RF）线圈阵列用于位于其中沿轴向方向（z）可操作地施加磁场的圆柱形空间内的被摄体的共振成像和/或分析。 线圈阵列包括围绕圆柱形空间的轴线相对于彼此成角度的多个线圈元件（10,11,12,13），每个线圈元件具有大致平行于磁场方向延伸的一对主导体 并且位于圆柱形空间的径向相对侧上，并且连接在主导体的各个端部之间的一对连接导体。 每个线圈元件在圆柱形空间的中心附近具有最大灵敏度，使得被研究对象位于最大灵敏度的区域。
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公开(公告)号：US07348780B2
公开(公告)日：2008-03-25
申请号：US10822398
申请日：2004-04-12
申请人： Stuart Crozier , Ben Lawrence , Desmond Yau , Kurt Luescher , Wolfgang Udo Roffman , David Michael Doddrell
发明人： Stuart Crozier , Ben Lawrence , Desmond Yau , Kurt Luescher , Wolfgang Udo Roffman , David Michael Doddrell
IPC分类号： G01V3/00
CPC分类号： G01R33/34046
摘要： Asymmetric radio frequency (RF) coils for magnetic resonance applications are provided. Also provided are time harmonic methods for designing such coils as well as symmetric coils. In addition, methods for converting complex current density functions into discrete capacitive and inductive elements are provided.
摘要翻译： 提供了用于磁共振应用的非对称射频（RF）线圈。 还提供了用于设计这种线圈以及对称线圈的时间谐波方法。 另外，提供了将复合电流密度函数转换成离散的电容和电感元件的方法。
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公开(公告)号：US06720768B2
公开(公告)日：2004-04-13
申请号：US09947178
申请日：2001-09-05
申请人： Stuart Crozier , Ben Lawrence , Desmond Yau , Kurt Luescher , Wolfgang Udo Roffman , David Michael Doddrell
发明人： Stuart Crozier , Ben Lawrence , Desmond Yau , Kurt Luescher , Wolfgang Udo Roffman , David Michael Doddrell
IPC分类号： G01V300
CPC分类号： G01R33/34046
摘要： Asymmetric radio frequency (RF) coils for magnetic resonance applications are provided. Also provided are time harmonic methods for designing such coils as well as symmetric coils. In addition, methods for converting complex current density functions into discrete capacitive and inductive elements are provided.
摘要翻译： 提供了用于磁共振应用的非对称射频（RF）线圈。 还提供了用于设计这种线圈以及对称线圈的时间谐波方法。 另外，提供了将复合电流密度函数转换成离散的电容和电感元件的方法。
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公开(公告)号：US06377148B1
公开(公告)日：2002-04-23
申请号：US09941181
申请日：2001-08-27
IPC分类号： G01V300
CPC分类号： G01R33/3875
摘要： Asymmetric zonal shim coils and shim sets for magnetic resonance applications are provided. Also provided are Fourier-series based methods for designing such coils as well as symmetric coils.
摘要翻译： 提供了用于磁共振应用的非对称带状垫片线圈和垫片组。 还提供了用于设计这种线圈以及对称线圈的基于傅里叶级数的方法。
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公开(公告)号：US6084497A
公开(公告)日：2000-07-04
申请号：US129572
申请日：1998-08-05
IPC分类号： G01R33/3815 , H01F5/00
CPC分类号： G01R33/3815
摘要： A compact magnet is disclosed for high field, superconducting magnets for use in magnetic resonance spectroscopy. The magnet has at least a first and a second group of coils with the or each coil in the first group having wound to provide a negative current density with respect to the other coils. The first group acts to enable the overall length of the magnet to be reduced while maintaining a homogenous field over a central region of the magnet.
摘要翻译： 公开了用于磁共振光谱的高场超导磁体的小型磁体。 磁体具有至少第一组和第二组线圈，其中第一组中的线圈或每个线圈具有绕组，以提供相对于其它线圈的负电流密度。 第一组起作用以使磁体的整个长度减小，同时保持在磁体的中心区域上的均匀场。
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公开(公告)号：US5642048A
公开(公告)日：1997-06-24
申请号：US602551
申请日：1996-02-20
CPC分类号： G01R33/34046
摘要： The invention concerns a birdcage resonator used as a transmitter and/or receiver coil in an NMR apparatus. The resonator comprises two ring-shaped conductors each of which is interrupted along its outer periphery by capacitors, the ring-shaped conductors being connected together by axial conducting strips. A plurality of axial conducting strips have their ends located between each pair of peripherally neighbouring capacitors. It is preferred when RF energy is coupled in or out between two conducting strips and when the ring-shaped conductors are shielded by shielding rings in the direction towards the sample. The birdcage resonator in accordance with the invention exhibits an improved RF field homogeneity at higher Q compared to conventional birdcage resonators.
摘要翻译： 本发明涉及一种用作NMR装置中的发射器和/或接收器线圈的鸟笼谐振器。 谐振器包括两个环形导体，每个环形导体沿其外周被电容器中断，环形导体通过轴向导电条连接在一起。 多个轴向导电带的端部位于每对外围相邻的电容器之间。 当RF能量耦合在两个导电条之间或之外时，优选的是当环形导体沿着朝向样品的方向被屏蔽环屏蔽时。 与传统的鸟笼谐振器相比，根据本发明的鸟笼谐振器在更高的Q下表现出改进的RF场均匀性。
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公开(公告)号：US20060119358A1
公开(公告)日：2006-06-08
申请号：US10525932
申请日：2003-08-29
IPC分类号： G01V3/00
CPC分类号： G01R33/34046
摘要： A radio frequency (RF) coil array is used in resonance imaging and/or analysis of a subject located within a cylindrical space in which a magnetic field is operatively applied in an axial direction (z). The coil array comprises a plurality of coil elements (10, 11, 12, 13) angled relative to each other about the axis of the cylindrical space, each coil element having a pair of main conductors extending generally parallel to the direction of the magnetic field and located on diametrically opposite sides of the cylindrical space, and a pair of connection conductors connected between respective ends of the main conductors. Each coil element has its maximum sensitivity near the centre of the cylindrical space, so that the subject under study is located in a region of maximum sensitivity.
摘要翻译： 射频（RF）线圈阵列用于位于其中沿轴向方向（z）可操作地施加磁场的圆柱形空间内的被摄体的共振成像和/或分析。 线圈阵列包括围绕圆柱形空间的轴线相对于彼此成角度的多个线圈元件（10,11,12,13），每个线圈元件具有大致平行于磁场方向延伸的一对主导体 并且位于圆柱形空间的径向相对侧上，并且连接在主导体的各个端部之间的一对连接导体。 每个线圈元件在圆柱形空间的中心附近具有最大灵敏度，使得被研究对象位于最大灵敏度的区域。
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公开(公告)号：US08390287B2
公开(公告)日：2013-03-05
申请号：US12593237
申请日：2008-03-26
申请人： Stuart Crozier , Bing Keong Li , Ewald Weber
发明人： Stuart Crozier , Bing Keong Li , Ewald Weber
IPC分类号： G01V3/00
CPC分类号： G01R33/34046 , A61B5/055 , G01R33/34076 , G01R33/365 , G01R33/5611
摘要： A Magnetic Resonance Imaging (MRI) phased array head coil (10) comprises an array of coils (1, 2, 3, 4) a decoupling circuit (7) and a decoupling base (14). Counter wound inductors from adjoining coils (1, 2, 3, 4) in the decoupling circuit (7) are interlaced to achieve mutual decoupling between adjoining coils. Each separate coil (1, 2, 3, 4) includes a pair of spaced parallel main conductors (12) located on opposite sides of a cylindrical space (5) enclosed by the coils (1, 2, 3, 4). The decoupling base (14) comprises two meandering conductor bases (8, 9) which are interlaced. Orthogonal main conductors (12) of the coil (1, 2, 3, 4) share a common conductor base (8, 9). The multiple crossings of the paths of the conductor bases (8, 9) reduces mutual coupling effects.
摘要翻译： 磁共振成像（MRI）相控阵列头线圈（10）包括线圈（1,2,3,4）阵列，去耦电路（7）和去耦基座（14）。 在去耦电路（7）中来自相邻线圈（1,2,3,4）的反绕绕电感器交织以实现相邻线圈之间的相互去耦。 每个分离的线圈（1,2,3,4）包括位于由线圈（1,2,3,4）包围的圆柱形空间（5）的相对侧上的一对隔开的平行主导体（12）。 去耦基座（14）包括两个交织的曲折导体基座（8,9）。 线圈（1,2,3,4）的正交主导体（12）共用公共导体基座（8,9）。 导体基座（8,9）的路径的多个交叉点减少了相互耦合效应。
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公开(公告)号：US20100079144A1
公开(公告)日：2010-04-01
申请号：US12447070
申请日：2007-10-26
申请人： Stuart Crozier , Huawei Zhao , Feng Liu
发明人： Stuart Crozier , Huawei Zhao , Feng Liu
IPC分类号： G01R33/24
CPC分类号： G01R33/3815 , G01R33/421
摘要： A magnetic resonance system uses a shielded superconducting magnet to produce a dsv useful for specialist imaging in an overall short magnet system at field strengths 1.5 Tesla and above. The magnet includes at least a first central coil C1, which has a length of at least 25% of the overall length of the magnet, and is used in concert with a series of symmetric primary coils, at least one set of which carry current in a direction opposite to that of the central coil. Force balancing is advantageously used in the design of the coils. The primary coils are shielded by at least one shielding coil, which carries current in a direction opposite to the majority of the primary coils. The magnet resonance system can be used for orthopedic imaging.
摘要翻译： 磁共振系统使用屏蔽超导磁体产生一个dsv，用于整个短磁体系统中的专家成像，场强为1.5特斯拉及以上。 该磁体包括至少一个第一中心线圈C1，该中心线圈C1的长度至少为磁铁整体长度的25％，并与一系列对称的初级线圈一致使用，至少一组载体电流 与中心线圈相反的方向。 力平衡有利地用于线圈的设计中。 初级线圈由至少一个屏蔽线圈屏蔽，该屏蔽线圈沿与大部分初级线圈相反的方向承载电流。 磁共振系统可用于矫形成像。
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