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.

公开(公告)号：US06639406B1

公开(公告)日：2003-10-28

申请号：US10141417

申请日：2002-05-08

申请人： Eddy B. Boskamp ,  Ceylan Celil Guclu ,  Ricardo Becerra

发明人： Eddy B. Boskamp ,  Ceylan Celil Guclu ,  Ricardo Becerra

IPC分类号： G01V300

CPC分类号： G01R33/365 ,  G01R33/3415 ,  G01R33/3678

摘要： A method and apparatus are disclosed for combining the respective readout signals for a loop and butterfly coil pair of a quadrature phased array used for magnetic resonance imaging. The technique used to combine the signals introduces a 180 degree phase shift, or multiple thereof, to the loop coil signal, thereby allowing the loop coil signal to be decoupled from other loop coil signals by a low input impedance preamplifier in series with the signal.

摘要翻译： 公开了用于组合用于磁共振成像的正交相控阵列的环路和蝶形线圈对的各个读出信号的方法和装置。 用于组合信号的技术将环路线圈信号引入180度相移或其多个相位，从而允许环路线圈信号通过与该信号串联的低输入阻抗前置放大器与其它环路线圈信号去耦。

公开(公告)号：US06538442B2

公开(公告)日：2003-03-25

申请号：US09747542

申请日：2000-12-22

申请人： Eddy B. Boskamp

发明人： Eddy B. Boskamp

IPC分类号： G01V300

CPC分类号： G01R33/4215

摘要： A combination gradient coil/RF shield is provided for magnetic resonance imaging systems. The coil may be adapted from any of the existing gradient coil structures, but is preferably an X-axis or Y-axis coil, with an inner Z-axis coil being inherently decoupled from the RF magnetic field due to its design. Capacitive circuits are provided between conductive paths of the selected gradient coil to adapt the gradient coil to the RF frequencies used during operation, such as 64 MHz. The technique permits the gradient coil assembly to be affectively moved closer to the patient while providing an enhanced distance between the RF coil and the RF shield defined by the adapted gradient coil.

摘要翻译： 为磁共振成像系统提供组合梯度线圈/ RF屏蔽。 线圈可以适用于任何现有的梯度线圈结构，但是优选地是X轴或Y轴线圈，由于其设计，内部Z轴线圈固有地与RF磁场解耦。 在所选择的梯度线圈的导电路径之间提供电容电路，以使梯度线圈适应于在操作期间使用的RF频率，例如64MHz。 该技术允许梯度线圈组件被感动地靠近患者移动，同时在由适配的梯度线圈限定的RF线圈和RF屏蔽之间提供增强的距离。

公开(公告)号：US06522144B2

公开(公告)日：2003-02-18

申请号：US09746931

申请日：2000-12-22

申请人： Eddy B. Boskamp

发明人： Eddy B. Boskamp

IPC分类号： G01V300

CPC分类号： G01R33/422 ,  G01R33/3806

摘要： An RF shielding technique is provided for open MRI systems. The RF shield includes a first portion disposed over a gradient field generating set, and a skirt-like second portion that wraps around lateral structures, such as the primary magnet and support. The two portions are joined to one another to form an integral RF shield that limits loss of RF energy both through the gradient field elements and through the primary magnet and support structures.

公开(公告)号：US06498947B2

公开(公告)日：2002-12-24

申请号：US09791307

申请日：2001-02-23

申请人： Eddy B. Boskamp ,  Richard P. Mallozzi ,  William A. Edelstein

发明人： Eddy B. Boskamp ,  Richard P. Mallozzi ,  William A. Edelstein

IPC分类号： A61B505

CPC分类号： G01R33/422

摘要： A technique is disclosed for shielding rf magnetic fields in MRI systems. An rf shield is embedded in a gradient coil structure including X-, Y- and Z-axis coils. The rf shield is positioned between an inner gradient coil which is inherently decoupled from the rf field, and the remaining coils which require rf shielding. The inner gradient coil may be a Z-axis coil wound as a solenoid, the field of which is generally orthogonal with respect to the rf magnetic field. The rf shield is thereby placed at an enhanced distance from the rf coil, providing greater efficiency and permitting energy levels to be reduced to obtain the desired rf magnetic field strength.

摘要翻译： 公开了一种用于屏蔽MRI系统中的rf磁场的技术。 rf屏蔽嵌入包括X，Y和Z轴线圈的梯度线圈结构中。 rf屏蔽位于固有地与rf场分离的内部梯度线圈和需要rf屏蔽的剩余线圈之间。 内部梯度线圈可以是卷绕成螺线管的Z轴线圈，其磁场大致与rf磁场正交。 因此，rf屏蔽件被放置在距离rf线圈增强的距离处，提供更高的效率并且允许减小能量水平以获得期望的rf磁场强度。

公开(公告)号：US06318734B1

公开(公告)日：2001-11-20

申请号：US09469134

申请日：1999-12-21

申请人： Eddy B. Boskamp

发明人： Eddy B. Boskamp

IPC分类号： F16J1506

CPC分类号： F01N13/1805 ,  F01N13/10 ,  F01N13/102 ,  F01N13/1827 ,  F01N2260/20 ,  F01N2450/24 ,  F16J15/061

摘要： A gasket having an integral support is provided that is suitable for use in connection with a heat shield in a gasket-heat shield assembly. The integral support may include a receiving cavity designed to accurately position and retain a portion of the heat shield. The integral support and gasket may further incorporate additional integral features to improve the positioning and connection of the heat shield to the gasket. A method for assembling a gasket-heat shield assembly is also disclosed.

摘要翻译： 提供了一种具有整体支撑件的垫圈，其适于与垫圈 - 热屏蔽组件中的隔热罩相结合使用。 整体支撑件可以包括设计成准确地定位和保持隔热罩的一部分的接收腔。 整体支撑件和衬垫可以进一步包括附加的整体特征以改善隔热件与衬垫的定位和连接。 还公开了一种用于组装垫圈 - 热屏蔽组件的方法。

公开(公告)号：US06313633B1

公开(公告)日：2001-11-06

申请号：US09469434

申请日：1999-12-27

申请人： Eddy B. Boskamp

发明人： Eddy B. Boskamp

IPC分类号： G01V300

CPC分类号： G01R33/34053 ,  G01R33/34076

摘要： A short radio frequency coil for magnetic resonance imaging of the head to provide a homogeneous magnetic field including parallel conductors forming a first cylindrical portion with end rings supporting the conductors which then continue at an angle to form the frustum of a cone and further continuing to form a reduced diameter second cylindrical portion. A third conductive end ring of reduced diameter positioned at the open end of the second cylindrical portion supports the end of the conductors and provides a reduced diameter opening. An asymmetrical coil surrounds portions of the radio frequency coil including the first cylindrical and frustum of a cone portions.

摘要翻译： 一种用于头部磁共振成像以提供均匀磁场的短的射频线圈，以提供均匀的磁场，包括形成第一圆柱形部分的平行导体，端部环支撑导体，然后导体以一定角度继续以形成锥体的平截头体并进一步连续形成 减径的第二圆柱形部分。 定位在第二圆柱形部分的开口端处的直径减小的第三导电端环支撑导体的端部并提供减小直径的开口。 不对称线圈环绕包括锥形部分的第一圆柱形和截头锥体的射频线圈的部分。