公开(公告)号：US06437567B1

公开(公告)日：2002-08-20

申请号：US09455430

申请日：1999-12-06

申请人： John Frederick Schenck ,  Ronald Dean Watkins ,  William Alan Edelstein ,  Sayed-Amr El-Hamamsy ,  Eddy B. Boskamp ,  Randy Otto John Giaquinto ,  John Andrew Mallick

发明人： John Frederick Schenck ,  Ronald Dean Watkins ,  William Alan Edelstein ,  Sayed-Amr El-Hamamsy ,  Eddy B. Boskamp ,  Randy Otto John Giaquinto ,  John Andrew Mallick

IPC分类号： G01V300

CPC分类号： G01R33/3415 ,  G01R33/34061 ,  G01R33/3806

摘要： A quadrature coil suitable for use with an open frame MRI system provides crossing pairs of arrays of parallel conductor elements, respectively. Compact configuration is provided through use of an isolating circuit for incorporating parasitic capacitances at the resonance frequency of the coil into a blocking parallel resonance. Termination of the parallel conductor elements may be accomplished by equal impedance node connectors formed from branching pairs of conductors or a triangular least resistance connection form. RF shields are provided by pairs of conductive sheets containing eddy current reducing slots aligned with the parallel conductors elements of the coil.

摘要翻译： 适用于开放式框架MRI系统的正交线圈分别提供平行导体元件的交叉对阵列。 通过使用用于将线圈的谐振频率处的寄生电容并入阻塞并联谐振的隔离电路来提供紧凑配置。 平行导体元件的端接可以通过由分支对导体或三角形最小电阻连接形式形成的等阻抗节点连接器来实​​现。 RF屏蔽件由包含与线圈的平行导体元件对准的涡流减小槽的导电片构成。

公开(公告)号：US5006803A

公开(公告)日：1991-04-09

申请号：US31064

申请日：1987-03-26

申请人： Eddy B. Boskamp ,  Rudolf Kemner

发明人： Eddy B. Boskamp ,  Rudolf Kemner

IPC分类号： G01R33/20 ,  A61B5/055 ,  A61B10/00 ,  G01R33/341 ,  G01R33/36 ,  G01R33/48

CPC分类号： G01R33/3657 ,  G01R33/341

摘要： For measurements with increased accuracy in a nuclear magnetic resonance apparatus, the detection device is equipped with one or more surface coils which act as measuring coils. To avoid mutual interference between a radio-frequency transmitting coil and the measuring coil, the measuring coil is provided with a decoupling circuit. The surface coil and the decoupling circuit form a part of a tuned circuit which is tuned to a significantly higher natural frequency during activation of the transmitting coil. On the other hand, the transmitting coil is shorted during detection with the surface coil by a low resistance shorting circuit, thereby avoiding interference with the radio-frequency transmission signals.

摘要翻译： 对于在核磁共振装置中具有更高精度的测量，检测装置配备有一个或多个作为测量线圈的表面线圈。 为了避免射频发射线圈与测量线圈之间的相互干扰，测量线圈设有去耦电路。 表面线圈和去耦电路形成调谐电路的一部分，该调谐电路在激励发射线圈期间调谐到显着更高的固有频率。 另一方面，在通过低电阻短路电路与表面线圈的检测期间发送线圈短路，从而避免与射频发送信号的干扰。

公开(公告)号：US4859947A

公开(公告)日：1989-08-22

申请号：US117003

申请日：1987-11-04

申请人： Eddy B. Boskamp

发明人： Eddy B. Boskamp

IPC分类号： G01R33/32 ,  A61B5/055 ,  A61B10/00 ,  G01R33/34 ,  G01R33/341 ,  G01R33/3415 ,  H01F7/20

CPC分类号： G01R33/3415 ,  G01R33/341

摘要： A magnetic resonance imaging apparatus includes a cascade of surface coils for detection so that larger objects can be measured while the attractive signal-to-noise ratio of surface coils is retained without mutual re-orientation of coils with respect to the object being required. By introducing a partial overlap between successive coils, suitable homogeneity can be achieved for the detection.

公开(公告)号：US20100033185A1

公开(公告)日：2010-02-11

申请号：US12188266

申请日：2008-08-08

申请人： Saikat Saha ,  Eddy B. Boskamp

发明人： Saikat Saha ,  Eddy B. Boskamp

IPC分类号： G01R33/44 ,  G01R33/3815 ,  A61B5/055

CPC分类号： G01R33/34076

摘要： A radio frequency (RF) coil for a magnetic resonance imaging (MRI) system includes a first end ring section containing a plurality of openings and a second end ring section containing a plurality of openings. A plurality of rungs is disposed between the first end ring section and the second end ring section. Each rung has a first end connected to the first end ring section and a second end connected to the second end ring section. Each rung can also include a plurality of openings. The openings in the end rings and rungs reduces eddy currents and improves RF performance of the RF coil.

摘要翻译： 用于磁共振成像（MRI）系统的射频（RF）线圈包括包含多个开口的第一端环部分和包含多个开口的第二端环部分。 多个梯级设置在第一端环部分和第二端环部分之间。 每个梯级具有连接到第一端环部分的第一端和连接到第二端环部分的第二端。 每个梯级还可以包括多个开口。 端环和梯级的开口减少了涡流，提高了RF线圈的射频性能。

公开(公告)号：US07285957B2

公开(公告)日：2007-10-23

申请号：US11623386

申请日：2007-01-16

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.

公开(公告)号：US07173425B2

公开(公告)日：2007-02-06

申请号：US11275685

申请日：2006-01-24

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型。

公开(公告)号：US06952100B1

公开(公告)日：2005-10-04

申请号：US10709354

申请日：2004-04-29

申请人： Graeme C. McKinnon ,  Eddy B. Boskamp ,  Shumin Wang

发明人： Graeme C. McKinnon ,  Eddy B. Boskamp ,  Shumin Wang

IPC分类号： G01R33/3415 ,  G01V3/00

CPC分类号： G01R33/3415

摘要： A magnetic resonance imaging assembly is provided. The assembly includes a magnet assembly defining a scanning bore along a z-direction. The assembly further includes a surface coil assembly positioned within the scanning bore. The surface coil assembly receives an imaging field. The surface coil assembly comprises a first surface coil positioned along the z-direction. The first surface coil is induced with a first coil current comprised of a first coil amplitude and a first coil phase. The surface coil assembly includes a second surface coil positioned along said z-direction. The second surface coil is induced with a second coil current comprised of a second coil amplitude and a second coil phase. The second coil phase is varied from the first coil phase to correct asymmetries within the imaging field.

摘要翻译： 提供磁共振成像组件。 组件包括沿z方向限定扫描孔的磁体组件。 组件还包括位于扫描孔内的表面线圈组件。 表面线圈组件接收成像场。 表面线圈组件包括沿z方向定位的第一表面线圈。 用第一线圈振幅和第一线圈相位的第一线圈电流感应第一表面线圈。 表面线圈组件包括沿着z方向定位的第二表面线圈。 第二表面线圈由包括第二线圈振幅和第二线圈相的第二线圈电流感应。 第二线圈相位从第一线圈相位变化，以校正成像场内的不对称性。

公开(公告)号：US5361765A

公开(公告)日：1994-11-08

申请号：US57939

申请日：1993-05-07

申请人： David J. Herlihy ,  Eddy B. Boskamp

发明人： David J. Herlihy ,  Eddy B. Boskamp

IPC分类号： A61B5/055 ,  G01R33/34 ,  G01R33/36

CPC分类号： A61B5/0555 ,  G01R33/34046 ,  G01R33/34007 ,  G01R33/34061 ,  G01R33/34084 ,  G01R33/3415 ,  G01R33/365 ,  G01R33/3664 ,  G01R33/3678

摘要： A quadrature local coil includes a bifurcated first loop positioned on one side of the patient and sensitive to RF magnetic flux generally parallel to the surface of the loop and a second loop positioned on the other side of the patient, opposed to the first loop and sensitive to RF magnetic flux within the patient perpendicular to that to which the first loop is sensitive. In one embodiment, the first and second loops are mounted in opposing concave shells held against and supported by the patient.

摘要翻译： 正交局部线圈包括位于患者一侧的分叉第一环，并且对通常平行于环的表面的RF磁通敏感，并且第二环位于患者的另一侧，与第一环相对并且敏感 到垂直于第一回路敏感的患者内的RF磁通量。 在一个实施例中，第一和第二环安装在保持抵靠患者身上并由患者支撑的相对的凹形外壳中。

公开(公告)号：US5030915A

公开(公告)日：1991-07-09

申请号：US483187

申请日：1990-02-20

申请人： Eddy B. Boskamp ,  Ching T. Lee

发明人： Eddy B. Boskamp ,  Ching T. Lee

IPC分类号： A61B5/055 ,  G01R33/34 ,  G01R33/341

CPC分类号： G01R33/3678 ,  G01R33/3415

摘要： A magnetic resonance imaging detection coil includes an outer coil divided into two symmetrical coils by a transverse central conductor. A 180.degree. phase shift network is coupled across the junction of the central transverse conductor with the outer conductor for providing the central conductor with a virtual ground potential when a magnetic field normal to the general plane of the coil system is present. The two coils formed by the central conductor and the outer conductor form parallel coils functioning similarly as a butterfly coil. The currents in the central conductor are cumulative, flowing in the same direction. The parallel coil system induces current on the central conductor which is 90.degree. out of phase with the current induced in the outer conductor. The signals corresponding to the parallel coil and series coil arrangement are then phase shift combined to place these signals in phase.

公开(公告)号：US4816765A

公开(公告)日：1989-03-28

申请号：US117118

申请日：1987-11-04

申请人： Eddy B. Boskamp

发明人： Eddy B. Boskamp

IPC分类号： G01R33/32 ,  A61B5/055 ,  A61B10/00 ,  G01R33/34 ,  G01R33/341 ,  G01R33/20

CPC分类号： G01R33/3678 ,  G01R33/341

摘要： The detection coil of a magnetic resonance imaging apparatus comprises a stack of two coils with locally mutually perpendicularly directed B Fields. The first coil is formed as a butterfly coil having a B field extending parallel to the plane of the coil, the second coil being formed by a single flat coil having a B field extending transversely of the plane of the coil. The coils are arranged in a fixed mutual orientation so that for each of the coils reciprocally applied fluxes are always compensated for.