公开(公告)号：US5256971A

公开(公告)日：1993-10-26

申请号：US884676

申请日：1992-05-18

申请人： Eddy B. Boskamp

发明人： Eddy B. Boskamp

IPC分类号： G01R33/341 ,  G01R33/36 ,  G01V3/00

CPC分类号： G01R33/365 ,  G01R33/3628 ,  G01R33/3678

摘要： A quadrature coil for receiving NMR signals in magnetic resonance imaging employs as few as two substantially coplanar overlapping loops having sensitivity along perpendicular lines in a region of sensitivity. Each loop is sensitive to a fluctuating uniform magnetic field but is decoupled by a decoupling network. A common ground point shared between the two loops allows the combination of the signals produced by the two loops with a hybrid combiner without the coupling of the loops through the signal's grounds. A third loop may be added to the two loops to produce a third signal to further improve the signal-to-noise ratio of the coil.

摘要翻译： 用于在磁共振成像中接收NMR信号的正交线圈在灵敏度区域中使用具有沿着垂直线的灵敏度的两个基本上共面的重叠环路。 每个回路对波动的均匀磁场敏感，但是通过去耦网络去耦。 两个回路之间共用的共同点是允许将两个回路产生的信号与混合组合器相结合，而不会通过信号接地的环路耦合。 可以将第三回路添加到两个回路中以产生第三信号，以进一步提高线圈的信噪比。

公开(公告)号：US4943775A

公开(公告)日：1990-07-24

申请号：US339030

申请日：1989-04-14

申请人： Eddy B. Boskamp ,  Wilhelmus R. M. Mens

发明人： Eddy B. Boskamp ,  Wilhelmus R. M. Mens

IPC分类号： G01R33/341 ,  G01R33/3415 ,  G01R33/36

CPC分类号： G01R33/365 ,  G01R33/341 ,  G01R33/3415 ,  G01R33/34007

摘要： In a magnetic resonance apparatus with an rf detection coil system constructed from overlapping coils the extent of overlap has been chosen to be so that the mutual inductance between overlapping coils is restricted to a non-disturbing minimum by flux compensation. As a result of this the coils of the cascade can be operated simultaneously for the measurement of coronal and sagittal slices without detrimental mutual influence.

摘要翻译： 在具有由重叠线圈构成的rf检测线圈系统的磁共振装置中，重叠的程度被选择为使得重叠线圈之间的互感通过磁通补偿被限制在不干扰的最小值。 作为其结果，级联的线圈可以同时操作用于测量冠状和矢状切片而没有有害的相互影响。

公开(公告)号：US07692427B2

公开(公告)日：2010-04-06

申请号：US11746504

申请日：2007-05-09

申请人： Wonje Lee ,  Krishna N. Kurpad ,  Eddy B. Boskamp

发明人： Wonje Lee ,  Krishna N. Kurpad ,  Eddy B. Boskamp

IPC分类号： G01V3/00

CPC分类号： G01R33/365 ,  G01R33/3415 ,  G01R33/5659

摘要： A RF transmit coil decoupling circuit in a parallel drive configuration comprises a power amplifier and an output matching network to shim the B1 field in response to inhomogeneities therein. The separate coil segments in a transmit array are effectively decoupled from each other despite inherent mutual inductance between coil segments by the decoupling circuit. The output matching network forms a high impedance block seen by the coil elements, while it provides a load line impedance at the output of the power amplifier. The transmission line transformer in the output matching network suppresses higher order harmonics for clearer RF wave forms. It also dampen the Q factor of the output matching network allowing stable operation with a series tuned coil element.

摘要翻译： 并联驱动配置中的RF发射线圈去耦电路包括功率放大器和输出匹配网络，以便响应于其中的不均匀性来使B1场振荡。 发射阵列中的分离的线圈段有效地相互分离，尽管线圈段之间由去耦电路固有的互感。 输出匹配网络形成线圈元件所看到的高阻抗块，同时在功率放大器的输出端提供负载线阻抗。 输出匹配网络中的传输线变压器抑制更高阶谐波，以获得更清晰的RF波形。 它还可以抑制输出匹配网络的Q系数，从而使串联调谐线圈元件稳定工作。

公开(公告)号：US07309989B2

公开(公告)日：2007-12-18

申请号：US10907582

申请日：2005-04-06

申请人： Eddy B. Boskamp ,  Ronald D. Watkins ,  Glen P. Koste

发明人： Eddy B. Boskamp ,  Ronald D. Watkins ,  Glen P. Koste

IPC分类号： G01V3/00

CPC分类号： G01R33/3692

摘要： A system wirelessly supplies electrical power to an RF coil and an analog-to-digital converter (ADC) for an MRI system. The system supplies power to at least operate the RF coil and ADC without the use of a battery and without use of a wired connection external to the bore of the magnet.

摘要翻译： 系统向MRI系统向RF线圈和模数转换器（ADC）无线地提供电力。 系统提供电源，至少在不使用电池的情况下操作RF线圈和ADC，而不需要使用磁铁外部的有线连接。

公开(公告)号：US07109712B2

公开(公告)日：2006-09-19

申请号：US11033071

申请日：2005-01-10

申请人： Eddy B. Boskamp

发明人： Eddy B. Boskamp

IPC分类号： G01V3/00

CPC分类号： G01R33/385 ,  G01R33/422

摘要： A method and apparatus are provided which reduce coupling between a Z-axis gradient coil and an rf coil in magnetic resonance imaging systems and an rf shield disposed between the Z-axis gradient coil and the remaining gradient coils. The reduction in coupling is accomplished by novel windings of conductor forming the Z-axis gradient coil.

公开(公告)号：US07088100B2

公开(公告)日：2006-08-08

申请号：US10708567

申请日：2004-03-11

申请人： Eddy B. Boskamp ,  Armen Kocharian ,  LeRoy Blawat

发明人： Eddy B. Boskamp ,  Armen Kocharian ,  LeRoy Blawat

IPC分类号： G01V3/00

CPC分类号： G01R33/34046

摘要： An RF coil assembly is presented that incorporates balun networks to eliminate standing waves from cables used to apply a voltage to multiple drive ports of the coil. Each drive port is driven by an applied voltage that is shifted 90 degrees in the tangential direction. Further, all drive ports are located on one end-ring of the coil, e.g. the superior end-ring. The inequality of the efficiency of the drive ports is reduced such that a substantially circular polarization in the volume of the coil is maintained. The present invention reduces asymmetrical loading by a patient as a result of patient asymmetry and patient contact with the opposite end-ring of the coil that normally negatively affects circular polarization and conventional coil configurations.

摘要翻译： 提出了一种RF线圈组件，其包括平衡 - 不平衡变换器网络，以消除用于将电压施加到线圈的多个驱动端口的电缆的驻波。 每个驱动端口由沿切线方向偏移90度的施加电压驱动。 此外，所有驱动端口位于线圈的一个端环上，例如， 上端端环。 减小驱动端口的效率的不等式，使得维持线圈体积中的基本圆形极化。 本发明由于患者不对称和患者与线圈的相对端环接触而导致患者的不对称负荷，其通常负面地影响圆偏振和常规线圈构造。

公开(公告)号：US06885194B2

公开(公告)日：2005-04-26

申请号：US10138858

申请日：2002-05-03

申请人： Eddy B. Boskamp

发明人： Eddy B. Boskamp

IPC分类号： A61B5/055 ,  G01R33/385 ,  G01R33/422 ,  G01S3/00

CPC分类号： G01R33/385 ,  G01R33/422

摘要： A method and apparatus are provided which reduce coupling between a Z-axis gradient coil and an rf coil in magnetic resonance imaging systems and an rf shield disposed between the Z-axis gradient coil and the remaining gradient coils. The reduction in coupling is accomplished by novel windings of conductor forming the Z-axis gradient coil.

摘要翻译： 提供一种降低磁共振成像系统中的Z轴梯度线圈和rf线圈之间的耦合的方法和装置，以及设置在Z轴梯度线圈和剩余梯度线圈之间的rf屏蔽。 通过形成Z轴梯度线圈的导体的新颖绕组实现耦合的减小。

公开(公告)号：US06411090B1

公开(公告)日：2002-06-25

申请号：US09681970

申请日：2001-07-02

申请人： Eddy B. Boskamp

发明人： Eddy B. Boskamp

IPC分类号： G01V300

CPC分类号： G01R33/34046 ,  G01R33/3614 ,  G01R33/3621

摘要： A magnetic resonance imaging (MRI) coil system is provided which comprises an RF coil element comprising a plurality of electrically conductive members spaced to form a generally tubular structure and defining an imaging volume. The coil element is adapted to receive a RF signal and apply a magnetic field to the imaging volume. A signal generator generates the RF signal, and a power splitter is adapted to distribute the RF signal across each of the plurality of electrically conductive members in signals of equal power. A phase shifter receives the split signals from the signal splitter and equally phase shifts each of the split RF signals across each of the plurality of electrically conductive members such that each conductor carries the signal at a different phase angle with respect to each other conductor. An amplifier is coupled to each of the conductors for independently controlling the current amplitude of the signal carried on the respective conductor.

摘要翻译： 提供磁共振成像（MRI）线圈系统，其包括RF线圈元件，RF线圈元件包括间隔开的多个导电构件，以形成大致管状结构并限定成像体积。 线圈元件适于接收RF信号并将磁场施加到成像体积。 信号发生器产生RF信号，并且功率分配器适于在相等功率的信号中分布在多个导电构件中的每一个上的RF信号。 移相器接收来自信号分离器的分离信号，并且跨越多个导电构件中的每一个均等地移位每个分离RF信号，使得每个导体相对于每个其它导体以不同的相位角承载信号。 放大器耦合到每个导体，用于独立地控制在相应导体上承载的信号的电流幅度。

公开(公告)号：US06404201B1

公开(公告)日：2002-06-11

申请号：US09681972

申请日：2001-07-02

申请人： Eddy B. Boskamp

发明人： Eddy B. Boskamp

IPC分类号： G01V300

CPC分类号： G01R33/34076

摘要： A radio frequency (RF) coil system for resonance imaging/analysis comprising a primary coil element having a plurality of axial conductors spaced to form a generally tubular structure having two ends and defining a coil volume, and a first pair of spoiler coils. The first pair of spoiler coils each comprising a plurality of axial conductors spaced to form a generally tubular structure and defining a coil volume. Each of the spoiler coils is positioned adjacent to and overlapping an end of the primary coil. Each of the primary and spoiler coils is also adapted to carry an RF signal, wherein the signal in the spoiler coils is 180 degrees out of phase with the signal in the primary coil. The counter-phased spoiler coils act to rapidly drive down the RF magnetic field generated by the primary coil in the region of the ends of the primary coil to reduce the occurrence of aliasing artifacts from outside the imaging field of view.

摘要翻译： 一种用于共振成像/分析的射频（RF）线圈系统，包括具有间隔开的多个轴向导体的初级线圈元件，以形成具有两端并限定线圈体积的大致管状结构，以及第一对扰流线圈。 第一对扰流板线圈每个包括多个轴向导体，间隔开以形成大致管状结构并限定线圈体积。 每个扰流板线圈定位成与初级线圈的端部相邻并重叠。 主要和扰流线圈中的每一个也适于承载RF信号，其中扰流线圈中的信号与初级线圈中的信号相差180度。 反相扰流器线圈用于在初级线圈的端部的区域内快速地降低由初级线圈产生的RF磁场，以减少来自成像视场外部的混叠伪影的出现。

公开(公告)号：US06249121B1

公开(公告)日：2001-06-19

申请号：US09313339

申请日：1999-05-17

申请人： Eddy B. Boskamp ,  John F. Schenck

发明人： Eddy B. Boskamp ,  John F. Schenck

IPC分类号： G01V300

CPC分类号： G01R33/34061 ,  G01R33/341 ,  G01R33/3678 ,  G01R33/3806

摘要： The present invention comprises a whole body RF coil system for use with an open magnetic resonance (MR) imaging system. The RF coil system comprises first and second quadrature RF coil sets positioned on opposing sides of an imaging volume. Each RF coil set comprises similarly-structured, multiple RF coils. Each quadrature RF coil comprises a first and second plurality of primary path conductor segments, and first and second return path conductors, symmetrically disposed about a centerline at specified distances. The first and second plurality of primary path conductor segments are positioned in a first plane that is substantially spaced apart from a second plane, further from the imaging volume, containing the first and second return path conductors. The conductors within each of the first and second set of primary path conductor segments are adapted to have a predetermined current amplitude ratio. Upon energization of the first and second RF coil sets in quadrature to generate a circular, polarized B1 field, the positioning of the conductors and the predetermined current amplitude ratio provide a desired homogeneity within the imaging volume and a desired sensitivity drop-off outside of the imaging volume.

摘要翻译： 本发明包括与开放磁共振（MR）成像系统一起使用的全身RF线圈系统。 RF线圈系统包括定位在成像体积的相对侧上的第一和第二正交RF线圈组。 每个RF线圈组包括类似结构的多个RF线圈。 每个正交RF线圈包括第一和第二多个主路径导体段，以及第一和第二返回路径导体，以指定距离对称地设置在中心线附近。 第一和第二多个主路径导体段位于与第二平面基本间隔开的第一平面中，该第二平面与成像体积更远，包含第一和第二返回路径导体。 第一和第二组主要路径导体段内的导体适于具有预定的电流幅度比。 在正交的第一和第二RF线圈组通电以产生圆形的极化B1场时，导体的定位和预定的电流振幅比在成像体积内提供所需的均匀性，并且在 成像体积。