公开(公告)号：US06538441B1

公开(公告)日：2003-03-25

申请号：US09682741

申请日：2001-10-12

申请人： Ronald Dean Watkins ,  John Frederick Schenck ,  Randy Otto John Giaquinto

发明人： Ronald Dean Watkins ,  John Frederick Schenck ,  Randy Otto John Giaquinto

IPC分类号： G01V300

CPC分类号： G01R33/34046

摘要： A radio frequency (RF) coil assembly for a very high field Magnetic Resonance Imaging (MRI) system is provided. The RF coil assembly comprises a plurality of conductors arranged cylindrically and disposed about a patient bore tube of the MRI system. Each of the conductors is configured for the RF coil assembly to resonate at substantially high frequencies. Further, the RF coil assembly comprises a plurality of capacitive elements disposed between and connecting respective ends of the conductors and further disposed in a spaced-apart relationship with the patient bore tube. The capacitive elements are for electrically interconnecting the plurality of conductors at the respective ends of the conductors.

摘要翻译： 提供了用于非常高场磁共振成像（MRI）系统的射频（RF）线圈组件。 RF线圈组件包括多个导体，其布置成圆柱形并围绕MRI系统的患者孔管设置。 每个导体被配置为用于RF线圈组件以基本上高的频率谐振。 此外，RF线圈组件包括多个电容元件，其设置在导体的相应端之间并连接到导体的相应端部，并且还与患者孔管以间隔开的关系设置。 电容元件用于在导体的相应端部处电连接多个导体。

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：US06982552B2

公开(公告)日：2006-01-03

申请号：US10445684

申请日：2003-05-27

申请人： Christopher Judson Hardy ,  John Frederick Schenck ,  William Daniel Barber ,  Cornelius Jan Von Morze

发明人： Christopher Judson Hardy ,  John Frederick Schenck ,  William Daniel Barber ,  Cornelius Jan Von Morze

IPC分类号： G01V3/00

CPC分类号： G01R33/385

摘要： Methods and apparatus for fabricating a magnetic resonance imaging (MRI) gradient coil for generating magnetic field gradients are provided. The method includes determining a pattern of gradient current paths on a surface using a set of stream functions oriented in at least one of a z-gradient, a y-gradient; and an x-gradient, and arranging conductive material to define a current path that conforms to the determined gradient current paths.

摘要翻译： 提供了用于制造用于产生磁场梯度的磁共振成像（MRI）梯度线圈的方法和装置。 该方法包括使用在z-梯度，y-梯度中的至少一个中定向的一组流函数来确定表面上的梯度电流路径的模式; 和x梯度，并且布置导电材料以限定符合所确定的梯度电流路径的电流路径。

公开(公告)号：US06822448B2

公开(公告)日：2004-11-23

申请号：US09839940

申请日：2001-04-20

申请人： Ronald Dean Watkins ,  John Frederick Schenck

发明人： Ronald Dean Watkins ,  John Frederick Schenck

IPC分类号： G01V300

CPC分类号： G01R33/34046

摘要： A radio frequency (RF) coil assembly for a very high field Magnetic Resonance Imaging (MRI) system is provided comprising a plurality of conductors arranged cylindrically and disposed about a cylindrical patient bore tube of the MRI system and a plurality of capacitive elements for electrically interconnecting the plurality of conductors at respective ends of the conductors. The conductors have a width selected for the RF coil assembly to resonate at substantially high frequencies. A very high field Magnetic Resonance Imaging (MRI) system is provided that comprises a RF coil assembly adapted to resonate at substantially high frequencies, a RF coil shield assembly and a plurality of RF drive power cables.

摘要翻译： 提供了一种用于非常高场磁共振成像（MRI）系统的射频（RF）线圈组件，其包括围绕MRI系统的圆柱形患者钻孔管圆柱形布置的多个导体和用于电互连的多个电容元件 在导体的相应端部处的多个导体。 导体具有选择用于RF线圈组件的宽度以基本上高的频率谐振。 提供了一种非常高的场磁共振成像（MRI）系统，其包括适于基本上高频率谐振的RF线圈组件，RF线圈屏蔽组件和多个RF驱动电力电缆。

公开(公告)号：US5705014A

公开(公告)日：1998-01-06

申请号：US620143

申请日：1996-03-22

申请人： John Frederick Schenck ,  Kenneth William Rohling

发明人： John Frederick Schenck ,  Kenneth William Rohling

IPC分类号： A61B18/20 ,  A61B5/055 ,  A61B10/02 ,  A61B17/00 ,  A61B17/28 ,  A61B19/00 ,  A61M5/32 ,  A61M25/095 ,  G01R33/28 ,  B32B31/00

CPC分类号： G01R33/28 ,  A61B2017/00911 ,  A61B2090/3954

摘要： Instruments are constructed of a carbon fiber material optionally doped with a doping agent such as iron oxide, the instrument having a magnetic susceptibility being adjusted to a portion of a subject being imaged. Therefore there is little effect upon the lines of magnetic flux and the magnetic field homogeneity, reducing distortion in an MR image. These carbon fiber instruments exhibit virtually no magnetic torsional forces when inserted into a magnetic field. This is important, for example when the instrument is a scalpel. Doped carbon fiber has minimal affect on radiofrequency fields. The instruments do not affect the homogeneity of an applied homogeneous magnetic field or an applied radiofrequency field. Doped carbon fiber exhibits a rigidity large enough to allow construction of high strength instruments such as biopsy needles. It also has the ability to retain a sharp edge, allowing construction of scalpels and cutting instruments. Doped carbon fiber surgical instruments may be used inside a magnetic field during magnetic resonance imaging, thereby allowing interactive internal images to be produced and displayed to a surgeon during surgery. A method is also disclosed for imaging a control material and then the instrument to determine the type and amount of doping agent required.

摘要翻译： 仪器由任选掺杂有掺杂剂如氧化铁的碳纤维材料构成，该仪器的磁化率被调整到被成像对象的一部分。 因此，磁通量线和磁场均匀性几乎没有影响，减少了MR图像的失真。 当插入到磁场中时，这些碳纤维仪器实际上表现出无磁力的扭转力。 这很重要，例如当仪器是手术刀时。 掺杂碳纤维对射频场的影响很小。 仪器不影响所施加的均匀磁场或应用的射频场的均匀性。 掺杂碳纤维表现出足够大的刚性，可以构建高强度仪器如活检针。 它还具有保留锋利边缘的能力，允许构建解剖刀和切割工具。 掺杂碳纤维外科器械可以在磁共振成像期间的磁场内使用，从而允许交互式内部图像在外科手术期间产生并显示给外科医生。 还公开了一种用于对对照材料成像并随后用于确定所需掺杂剂的类型和量的仪器的方法。