公开(公告)号：US06252405B1

公开(公告)日：2001-06-26

申请号：US09440813

申请日：1999-11-15

申请人： Ronald Dean Watkins ,  William Daniel Barber ,  Peter George Frischmann

发明人： Ronald Dean Watkins ,  William Daniel Barber ,  Peter George Frischmann

IPC分类号： G01V300

CPC分类号： G01R33/389 ,  G01R33/3804

摘要： An MRI system includes a magnet which produces the main polarizing magnetic field. Variations in strength of this field are corrected by a temperature compensation system that calculates a compensating flux needed to maintain the field at constant strength. The compensating flux is calculated from changes in sensed magnet temperature and a magnet temperature coefficient. One or more correction coils are wound around the magnet and driven with the current necessary to produce the compensating flux.

摘要翻译： MRI系统包括产生主极化磁场的磁体。 通过温度补偿系统校正该领域的强度变化，该系统计算将场保持在恒定强度所需的补偿通量。 补偿通量是根据感应磁体温度和磁体温度系数的变化计算的。 一个或多个校正线圈绕在磁体周围并用产生补偿磁通所需的电流驱动。

公开(公告)号：US07705701B2

公开(公告)日：2010-04-27

申请号：US11183274

申请日：2005-07-15

申请人： Xianrui Huang ,  William Daniel Barber ,  Paul St. Mark Shadforth Thompson ,  Evangelos Trifon Laskaris ,  Kiruba Sivasubramaniam

发明人： Xianrui Huang ,  William Daniel Barber ,  Paul St. Mark Shadforth Thompson ,  Evangelos Trifon Laskaris ,  Kiruba Sivasubramaniam

IPC分类号： H01F7/00 ,  H01F1/00 ,  H01F6/00

CPC分类号： G01R33/3815 ,  Y10T428/13

摘要： A composite sealed vessel is provided. The vessel includes a non-metallic, generally cylindrical inner containment piece, a non-metallic, generally cylindrical outer containment piece disposed around the inner containment piece. A pair of non-metallic flanges are disposed at ends of the inner and outer containment pieces to form a closed structure defining a cavity therein. The vessel also includes a metallic external lining disposed over the closed structure to form a leak-tight pressure boundary.

摘要翻译： 提供复合密封容器。 容器包括非金属的，大致圆柱形的内部容纳件，设置在内部容纳件周围的非金属的，大致圆柱形的外部容纳件。 一对非金属凸缘设置在内部和外部容纳件的端部处以形成在其中限定空腔的封闭结构。 容器还包括设置在封闭结构上的金属外衬，以形成密封压力边界。

公开(公告)号：US07167000B2

公开(公告)日：2007-01-23

申请号：US11023140

申请日：2004-12-22

申请人： Kathleen Melanie Amm ,  Ronald Dean Watkins ,  William Daniel Barber ,  Christopher Judson Hardy ,  Kenneth William Rohling

发明人： Kathleen Melanie Amm ,  Ronald Dean Watkins ,  William Daniel Barber ,  Christopher Judson Hardy ,  Kenneth William Rohling

IPC分类号： G01V3/00

CPC分类号： G01R33/3415 ,  G01R33/34007 ,  G01R33/34023 ,  G01R33/341

摘要： A cryogenically cooled radiofrequency (RF) coil structure for use in Magnetic Resonance Imaging (MRI) and method for cryogenically cooling RF coils are provided. The cryogenically cooled RF coil structure comprises a sealed structure constructed of non-conducting material and adapted for containing a cooling substance and at least one RF coil disposed integrally in contact with the sealed structure such that sealed structure and integrally disposed RF coil are disposed about an object to be imaged.

摘要翻译： 提供了用于磁共振成像（MRI）的低温冷却射频（RF）线圈结构和用于低温冷却RF线圈的方法。 低温冷却的RF线圈结构包括由非导电材料构成并适于容纳冷却物质的密封结构和与密封结构一体地设置的至少一个RF线圈，使得密封结构和整体设置的RF线圈围绕 要成像的对象。

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：US06937018B2

公开(公告)日：2005-08-30

申请号：US10699185

申请日：2003-10-31

申请人： William Daniel Barber ,  Bulent Aksel ,  Peter George Frischmann

发明人： William Daniel Barber ,  Bulent Aksel ,  Peter George Frischmann

IPC分类号： G01R33/383 ,  A61B5/055 ,  G01R33/38 ,  G01V3/00

CPC分类号： G01R33/3806

摘要： An imaging system including at least one pole piece is described. The at least one pole piece includes at least two grain-oriented sheets that are stacked together, where a direction of easy magnetization of a first of the at least two grain-oriented sheets is different than a direction of easy magnetization of a second of the at least two grain-oriented sheets.

摘要翻译： 描述了包括至少一个极靴的成像系统。 所述至少一个极靴包括堆叠在一起的至少两个晶粒取向片材，其中所述至少两个晶粒取向片材中的第一个的容易磁化方向不同于所述至少两个晶粒取向片材中的第二个的容易磁化的方向 至少两个晶粒取向片材。

公开(公告)号：US06906517B1

公开(公告)日：2005-06-14

申请号：US10951469

申请日：2004-09-28

申请人： Xianrui Huang ,  Paul St. Mark Shadforth Thompson ,  Kathleen Melanie Amm ,  William Daniel Barber

发明人： Xianrui Huang ,  Paul St. Mark Shadforth Thompson ,  Kathleen Melanie Amm ,  William Daniel Barber

IPC分类号： G01R33/38 ,  G01R33/383 ,  G01R33/385 ,  G01R33/3873 ,  G01V3/00

CPC分类号： G01R33/3856 ,  G01R33/3802 ,  G01R33/3804 ,  G01R33/383 ,  G01R33/3873

摘要： Briefly in accordance with one aspect, the present technique provides a method for heating a permanent magnet in a magnetic resonance imaging system. The method for heating a permanent magnet includes directly heating a surface of the permanent magnet using a surface heater. The present technique also provides a system for heating a permanent magnet in a magnetic resonance imaging system. The system includes a surface heater configured to directly heat a surface of the permanent magnet.

摘要翻译： 简单地说，根据一个方面，本技术提供了一种在磁共振成像系统中加热永磁体的方法。 用于加热永磁体的方法包括使用表面加热器直接加热永磁体的表面。 本技术还提供了一种用于加热磁共振成像系统中的永磁体的系统。 该系统包括配置成直接加热永磁体表面的表面加热器。

公开(公告)号：US6150818A

公开(公告)日：2000-11-21

申请号：US143960

申请日：1998-08-31

申请人： William Daniel Barber

发明人： William Daniel Barber

IPC分类号： A61B5/055 ,  A61B5/00 ,  G01R33/383 ,  G01R33/385 ,  G01R33/565 ,  H01F7/20 ,  G01V3/00

CPC分类号： H01F7/202 ,  G01R33/383 ,  G01R33/56518

摘要： Pole faces for an open magnetic resonance (MR) imaging system are constructed from a number of blocks having laminate sheets. The laminate sheets of the blocks are aligned, such that they are parallel to the flux of an applied time-changing magnetic field. Each laminate sheet is constructed of an amorphous material such that there is no predominant magnetic field alignment. This construction reduces eddy currents induced in the pole faces, and reduces residual magnetization, thereby reducing artifacts in an acquired image.

摘要翻译： 用于开放磁共振（MR）成像系统的极面由多个具有层叠片的块构成。 块的层叠片被对准，使得它们平行于所施加的时变磁场的通量。 每个层压板由非晶材料构成，使得不存在主要的磁场对准。 这种结构减少了磁极面中引起的涡电流，并且减少了剩余磁化，从而减少了获得的图像中的伪像。