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1.发明授权公开(公告)号：US08421462B2
公开(公告)日：2013-04-16
申请号：US12528536
申请日：2008-01-30
IPC分类号： G01V3/00
CPC分类号： G01R33/34046 , G01R33/3635 , G01R33/422
摘要： A radio frequency coil assembly includes an annular conductor (20, 22, 120) configured to support a sinusoidal electrical current distribution at a magnetic resonance frequency, and a radio frequency shield (30, 32, 34, 52, 60, 61, 130) shielding the annular conductor in at least one direction, the radio frequency shield including at least one of (i) a cylindrical shield portion (30, 60, 61, 130) surrounding a perimeter of the annular conductor, and (ii) a planar shield portion (32, 34, 52) arranged generally parallel with the annular conductor. In a magnetic resonance scanner embodiment, a magnet (10) generates a static magnetic field (B0), a magnetic field gradient system (14) is configured to superimpose selected magnetic field gradients on the static magnetic field, and said radio frequency coil assembly is arranged with the annular conductor generally transverse to the static magnetic field (B0).
摘要翻译： 射频线圈组件包括被配置为支持磁共振频率的正弦电流分布的环形导体（20,22，120）和射频屏蔽（30,32,34,52,60,61,130） 在至少一个方向上屏蔽环形导体，射频屏蔽包括以下至少一个：（i）围绕环形导体的周边的圆柱形屏蔽部分（30,60,61,130），和（ii）平面屏蔽 大体平行于环形导体布置的部分（32,34,52）。 在磁共振扫描器实施例中，磁体（10）产生静磁场（B0），磁场梯度系统（14）被配置为将选定的磁场梯度叠加在静磁场上，而所述射频线圈组件 与环形导体布置成大体横向于静磁场（B0）。
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公开(公告)号：US08013607B2
公开(公告)日：2011-09-06
申请号：US12369311
申请日：2009-02-11
IPC分类号： G01V3/00
CPC分类号： G01R33/28 , G01R33/3875 , G01R33/421 , G01R33/422 , G01R33/481 , G01R33/4812 , G01T1/1603
摘要： A positron emission tomography (PET) detector ring comprising: a radiation detector ring comprising scintillators (74) viewed by photomultiplier tubes (72); and a magnetic field shielding enclosure (83, 84) surrounding sides and a back side of the annular radiation detector ring so as to shield the photomultiplier tubes of the radiation detector ring. Secondary magnetic field shielding (76′) may also be provided, comprising a ferromagnetic material having higher magnetic permeability and lower magnetic saturation characteristics as compared with the magnetic field shielding enclosure, the second magnetic field shielding also arranged to shield the photomultiplier tubes of the radiation detector ring. The secondary magnetic field shielding may comprise a mu-metal. The PET detector ring may be part of a hybrid imaging system also including a magnetic resonance (MR) scanner, the PET detector ring being arranged respective to the MR scanner such that a stray magnetic field from the MR scanner impinges on the PET detector ring.
摘要翻译： 一种正电子发射断层摄影（PET）检测器环，包括：由光电倍增管（72）观察的包括闪烁体（74）的辐射检测器环; 以及围绕环形辐射探测器环的侧面和背面的磁场屏蔽罩（83,84），以屏蔽辐射探测器环的光电倍增管。 还可以提供二次磁场屏蔽（76'），其包括与磁场屏蔽外壳相比具有较高磁导率和较低磁饱和特性的铁磁材料，第二磁场屏蔽也被布置成屏蔽光电倍增管的辐射 探测器环。 次级磁场屏蔽可以包括多金属。 PET检测器环可以是还包括磁共振（MR）扫描仪的混合成像系统的一部分，PET检测器环被布置为相应于MR扫描器，使得来自MR扫描仪的杂散磁场照射在PET检测器环上。
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公开(公告)号：US07852084B2
公开(公告)日：2010-12-14
申请号：US12297652
申请日：2007-04-03
IPC分类号： G01V3/00
CPC分类号： G01R33/5659 , G01R33/246 , G01R33/3415
摘要： In a magnetic resonance scanner, a main magnet (20, 22) generates a static magnetic field at least in an examination region. A magnetic field gradient system (30, 54) selectively superimposes magnetic field gradients on the static magnetic field at least in the examination region. A magnetic resonance excitation system (36, 36′) includes at least one radio frequency coil (30, 301, 302, 303) arranged to inject radio frequency B1 fields into the examination region and at least two radio frequency amplifiers (38, 40, 40′) coupled with different input ports of the at least one radio frequency coil. A controller (66, 70) controls the magnetic resonance excitation system to produce a time varying spatial B1 field distribution in a subject (16) in the examination region that time integrates to define a spatial tip angle distribution in the subject having reduced spatial non uniformity.
摘要翻译： 在磁共振扫描器中，主磁体（20,22）至少在检查区域中产生静磁场。 磁场梯度系统（30,54）至少在检查区域中选择性地将磁场梯度叠加在静磁场上。 磁共振激励系统（36,36'）包括至少一个射频线圈（30,301,302,303），其布置成将射频B1场注入检查区域，并且至少两个射频放大器（38,40,303） 40'）耦合到所述至少一个射频线圈的不同输入端口。 控制器（66,70）控制磁共振激励系统以在检查区域中的对象（16）中产生时变空间B1场分布，该时间积分以限定被摄体中的具有降低的空间非均匀性的空间尖角分布 。
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公开(公告)号：US20100253333A1
公开(公告)日：2010-10-07
申请号：US12742973
申请日：2008-12-12
IPC分类号： G01R33/44
CPC分类号： G01R33/34046 , G01R33/34076 , G01R33/345 , G01R33/3453 , G01R33/3635 , G01R33/422
摘要： A magnetic resonance coil includes parallel elongate conductive elements (32) arranged to define a cylinder, and end rings (34, 35) disposed at opposite ends of the parallel elongate conductive elements and oriented transverse to the parallel elongate conductive elements. The end rings are configured to support a sinusoidal 1H or other first species magnetic resonance at a magnetic field strength. The end rings and the parallel elongate conductive elements are configured to cooperatively support a second species birdcage magnetic resonance at the same magnetic field strength, the second species being different from 1H or other first species.
摘要翻译： 磁共振线圈包括布置成限定圆柱体的平行细长导电元件（32）和设置在平行细长导电元件的相对端并且横向于平行细长导电元件定向的端环（34,35）。 端环被配置成在磁场强度下支持正弦1H或其它第一种磁共振。 端环和平行细长导电元件构造成协同地支撑具有相同磁场强度的第二物种鸟笼磁共振，第二物种不同于1H或其它第一物种。
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5.发明申请SINUSOIDALLY RESONANT RADIO FREQUENCY VOLUME COILS FOR HIGH FIELD MAGNETIC RESONANCE APPLICATIONS 失效用于高场磁共振应用的SINUSOIDALLY谐振无线电频率线圈公开(公告)号：US20100117642A1
公开(公告)日：2010-05-13
申请号：US12528536
申请日：2008-01-30
IPC分类号： G01R33/44
CPC分类号： G01R33/34046 , G01R33/3635 , G01R33/422
摘要： A radio frequency coil assembly includes an annular conductor (20, 22, 120) configured to support a sinusoidal electrical current distribution at a magnetic resonance frequency, and a radio frequency shield (30, 32, 34, 52, 60, 61, 130) shielding the annular conductor in at least one direction, the radio frequency shield including at least one of (i) a cylindrical shield portion (30, 60, 61, 130) surrounding a perimeter of the annular conductor, and (ii) a planar shield portion (32, 34, 52) arranged generally parallel with the annular conductor. In a magnetic resonance scanner embodiment, a magnet (10) generates a static magnetic field (B0), a magnetic field gradient system (14) is configured to superimpose selected magnetic field gradients on the static magnetic field, and said radio frequency coil assembly is arranged with the annular conductor generally transverse to the static magnetic field (B0).
摘要翻译： 射频线圈组件包括被配置为支持磁共振频率的正弦电流分布的环形导体（20,22，120）和射频屏蔽（30,32,34,52,60,61,130） 在至少一个方向上屏蔽环形导体，射频屏蔽包括以下至少一个：（i）围绕环形导体的周边的圆柱形屏蔽部分（30,60,61,130），和（ii）平面屏蔽 大体平行于环形导体布置的部分（32,34,52）。 在磁共振扫描器实施例中，磁体（10）产生静磁场（B0），磁场梯度系统（14）被配置为将选定的磁场梯度叠加在静磁场上，而所述射频线圈组件 与环形导体布置成大体横向于静磁场（B0）。
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公开(公告)号：US20100060282A1
公开(公告)日：2010-03-11
申请号：US12302343
申请日：2007-05-09
IPC分类号： G01R33/44
CPC分类号： G01R33/385 , G01R33/421 , G01R33/4215
摘要： A transverse magnetic field gradient coil includes a set of primary coil loops (62) defining an operative coil end (66) and a distal coil end (68). The set of primary coil loops are configured to generate a magnetic field gradient in a selected region asymmetrically disposed relatively closer to the operative coil end and relatively further from the distal coil end. A set of shield coil loops (64) are disposed outside the set of primary coil loops and are configured to substantially shield the set of primary coil loops. Two or more current jumps (70) are disposed at the distal end. Each current jump electrically connects an incomplete loop of the set of primary coil loops with an incomplete loop of the set of shield coil loops.
摘要翻译： 横向磁场梯度线圈包括限定操作线圈端（66）和远端线圈端（68）的一组初级线圈环（62）。 一组初级线圈环被配置为在选择的区域中生成磁场梯度，所述选择区域非对称地布置成相对更靠近操作线圈端并且远离远侧线圈端。 一组屏蔽线圈环（64）设置在初级线圈环组之外，并被配置为基本上屏蔽该组初级线圈环。 在远端设置两个或多个电流跳跃（70）。 每个电流跳跃将一组初级线圈回路的不完整回路与该组屏蔽线圈回路的不完整回路电连接。
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公开(公告)号：US20090102483A1
公开(公告)日：2009-04-23
申请号：US12297652
申请日：2007-04-03
IPC分类号： G01R33/32
CPC分类号： G01R33/5659 , G01R33/246 , G01R33/3415
摘要： In a magnetic resonance scanner, a main magnet (20, 22) generates a static magnetic field at least in an examination region. A magnetic field gradient system (30, 54) selectively superimposes magnetic field gradients on the static magnetic field at least in the examination region. A magnetic resonance excitation system (36, 36′) includes at least one radio frequency coil (30, 301, 302, 303) arranged to inject radio frequency B1 fields into the examination region and at least two radio frequency amplifiers (38, 40, 40′) coupled with different input ports of the at least one radio frequency coil. A controller (66, 70) controls the magnetic resonance excitation system to produce a time varying spatial B1 field distribution in a subject (16) in the examination region that time integrates to define a spatial tip angle distribution in the subject having reduced spatial non uniformity.
摘要翻译： 在磁共振扫描器中，主磁体（20,22）至少在检查区域中产生静磁场。 磁场梯度系统（30,54）至少在检查区域中选择性地将磁场梯度叠加在静磁场上。 磁共振激励系统（36,36'）包括至少一个射频线圈（30,301,302,303），其布置成将射频B1场注入检查区域，并且至少两个射频放大器（38,40,303） 40'）耦合到所述至少一个射频线圈的不同输入端口。 控制器（66,70）控制磁共振激励系统以在检查区域中的对象（16）中产生时变空间B1场分布，该时间积分以限定被摄体中的具有降低的空间非均匀性的空间尖角分布 。
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公开(公告)号：US20080129292A1
公开(公告)日：2008-06-05
申请号：US10595862
申请日：2004-11-03
申请人： Christoph G. Leussler , Christian Findeklee , Michael A. Morich , Zhiyong Zhai , Gordon D. DeMeester
发明人： Christoph G. Leussler , Christian Findeklee , Michael A. Morich , Zhiyong Zhai , Gordon D. DeMeester
IPC分类号： G01R33/422 , G01R33/34
CPC分类号： G01R33/3415 , G01R33/34046 , G01R33/34076 , G01R33/345 , G01R33/3453 , G01R33/3635 , G01R33/3642 , G01R33/365 , G01R33/3678 , G01R33/422 , G01R33/5659
摘要： A radio frequency coil system (38) for magnetic resonance imaging includes a plurality of parallel spaced apart rungs (60) which each includes rung capacitors (68). An end cap (64) is disposed at a closed end (66) of the coil system (38). An RF shield (62) is connected to the end cap (64) and surrounds the rungs (60), extending in a direction substantially parallel to rungs (60). The RF coil system (38) may be used as birdcage, TEM, hybrid, combination birdcage and TEM, or other.
摘要翻译： 一种用于磁共振成像的射频线圈系统（38）包括多个平行隔开的梯级（60），每个梯级包括梯级电容器（68）。 端盖（64）设置在线圈系统（38）的封闭端（66）处。 RF屏蔽（62）连接到端盖（64）并且围绕梯级（60）沿着基本平行于梯级（60）的方向延伸。 RF线圈系统（38）可以用作鸟笼，TEM，混合，组合鸟笼和TEM等。
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9.发明授权Efficiently shielded MRI gradient coil with discretely or continuously variable field of view 失效具有离散或连续可变视野的高效屏蔽MRI梯度线圈公开(公告)号：US06479999B1
公开(公告)日：2002-11-12
申请号：US09874773
申请日：2001-06-05
IPC分类号： G01V300
CPC分类号： G01R33/4215 , G01R33/3875
摘要： A gradient coil assembly generates magnetic field gradients across the main magnetic field of a magnetic resonance imaging apparatus and includes a primary gradient coil (22p) switchable between a first configuration which generates magnetic field gradients which are substantially linear over a first useful imaging volume, and a second configuration which generates magnetic field gradients which are substantially linear over a second useful imaging volume. A first shield coil set (22s1) is complimentary to the primary gradient coil in one of the first and second configurations, and a second shield coil set (22s2), when either used alone or in combination with the first shield coil, is complimentary to the other of the first and second configurations.
摘要翻译： 梯度线圈组件在磁共振成像设备的主磁场上产生磁场梯度，并且包括可在第一配置之间切换的主梯度线圈（22p），所述第一配置产生在第一有用成像体积上基本上线性的磁场梯度;以及 产生在第二有用成像体积上基本上线性的磁场梯度的第二配置。 第一屏蔽线圈组（22s1）在第一和第二配置之一中与主梯度线圈互补，并且当单独使用或与第一屏蔽线圈组合使用时，第二屏蔽线圈组（22s2）与 第一和第二配置中的另一个。
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公开(公告)号：US06441615B1
公开(公告)日：2002-08-27
申请号：US09473072
申请日：1999-12-28
IPC分类号： G01V300
CPC分类号： G01R33/3415 , G01R33/34 , G01R33/34061
摘要： A crossed-ladder RF coil assembly (48) is employed for quadrature excitation and/or reception in an open or vertical field magnetic resonance apparatus. The RF coil assembly (48, 70, 90) includes a pair of coil assemblies (50, 52; 70, 72; 100, 102) which are disposed in a parallel relationship. Coil arrays (50, 52; 100, 102) include at least two ladder RF coils (501, 502, 503; 521, 522, 523; 1001 . . . , 1008; 1021, . . . , 1028) which are disposed in an overlapping relationship and are rotated by 90° relative to one another. Each ladder RF coil of one coil array is rotated by 90° relative to adjoining ladder coils and each corresponding ladder RF coil of the other coil array. The crossed-ladder RF coil assembly provides better B1 field uniformity and elongated anatomical coverage for spine and neck imaging. In addition, the RF coil assembly reduces noise from the body at higher fields in vertical field magnetic resonance systems.
摘要翻译： 交叉梯形RF线圈组件（48）用于开放或垂直场磁共振装置中的正交激励和/或接收。 RF线圈组件（48,70,90）包括以平行关系设置的一对线圈组件（50,52; 70,72; 100,102）。 线圈阵列（50,52; 100,102）包括至少两个梯形RF线圈（501,502,503; 521,522,523; 1001 ... 1008; 1021，...，1028） 重叠关系并相对于彼此旋转90°。 一个线圈阵列的每个梯形RF线圈相对于邻接的梯形线圈和另一个线圈阵列的每个对应的梯形RF线圈旋转90°。 交叉梯形RF线圈组件为脊柱和颈部成像提供更好的B1场均匀性和细长的解剖学覆盖。 此外，RF线圈组件在垂直场磁共振系统中在较高场中减少来自身体的噪声。
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