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    Head coil arrays for parallel imaging in magnetic resonance imaging
    3.
    发明授权
    Head coil arrays for parallel imaging in magnetic resonance imaging 有权
    用于磁共振成像中的并行成像的头部线圈阵列

    公开(公告)号：US06930480B1

    公开(公告)日：2005-08-16

    申请号：US10187353

    申请日：2002-06-28

    申请人： Hiroyuki Fujita ,  Labros S. Petropoulos ,  Mark Xueming Zou ,  Pei H. Chan ,  Dashen Chu ,  Joseph Murphy-Boesch

    发明人： Hiroyuki Fujita ,  Labros S. Petropoulos ,  Mark Xueming Zou ,  Pei H. Chan ,  Dashen Chu ,  Joseph Murphy-Boesch

    IPC分类号： G01R33/34 ,  G01R33/561 ,  G01V3/00

    CPC分类号： G01R33/34046 ,  G01R33/5611

    摘要： A partially parallel acquisition RF coil array for imaging a human head includes at least a first, a second and a third loop coil adapted to be arranged circumambiently about the lower portion of the head; and at least a forth, a fifth and a sixth coil adapted to be conformably arranged about the summit of the head. A partially parallel acquisition RF coil array for imaging a human head includes at least a first, a second, a third and a fourth loop coil adapted to be arranged circumambiently about the lower portion of the head; and at least a first and a second Figure-8 or saddle coil adapted to be conformably arranged about the summit of the head.

    摘要翻译： 用于对人头进行成像的部分并行采集RF线圈阵列包括至少第一，第二和第三环形线圈，其适于围绕头部的下部周边布置; 以及适于围绕头部的顶点顺应地布置的至少一个第四，第五和第六线圈。 用于对人头进行成像的部分并行采集RF线圈阵列包括至少第一，第二，第三和第四环形线圈，其适于围绕头部的下部周边布置; 以及至少第一和第二图8或鞍形线圈，其适于围绕头部的顶点顺应地布置。

    System and method for receiving magnetic resonance (MR) signals with an FET electrically between preamplifier terminals
    4.
    发明授权
    System and method for receiving magnetic resonance (MR) signals with an FET electrically between preamplifier terminals 有权
    在前置放大器端子之间用FET接收磁共振（MR）信号的系统和方法

    公开(公告)号：US09018955B2

    公开(公告)日：2015-04-28

    申请号：US13163440

    申请日：2011-06-17

    申请人： Dashen Chu ,  Robert Stormont ,  Scott Lindsay ,  Ricardo Matias

    发明人： Dashen Chu ,  Robert Stormont ,  Scott Lindsay ,  Ricardo Matias

    IPC分类号： G01R33/36

    CPC分类号： G01R33/365 ,  G01R33/3621

    摘要： A preamplifier is provided for a radio frequency (RF) receiver coil in a magnetic resonance imaging (MRI) system. The preamplifier includes an amplifier configured to receive at least one magnetic resonance (MR) signal from the RF receiver coil and configured to generate an amplified MR signal. An input circuit is electrically connected to the amplifier. The input circuit is configured to be electrically connected to an output of the RF receiver coil for transmitting the at least one MR signal from the RF receiver coil to the amplifier. The input circuit includes an impedance transformer and a field effect transistor (FET). The FET is electrically connected between the impedance transformer and the amplifier. The FET has an FET impedance. The impedance transformer is configured to transform a source impedance of at least approximately 100 ohms. The impedance transformer is further configured to transform the FET impedance into a preamplifier input impedance of less than approximately 5 ohms.

    摘要翻译： 为磁共振成像（MRI）系统中的射频（RF）接收器线圈提供前置放大器。 前置放大器包括放大器，其被配置为从RF接收器线圈接收至少一个磁共振（MR）信号，并被配置为产生放大的MR信号。 输入电路电连接到放大器。 输入电路被配置为电连接到RF接收器线圈的输出端，用于将来自RF接收器线圈的至少一个MR信号传输到放大器。 输入电路包括阻抗变换器和场效应晶体管（FET）。 FET电连接在阻抗变换器和放大器之间。 FET具有FET阻抗。 阻抗变换器被配置成转换至少约100欧姆的源阻抗。 阻抗变换器还被配置成将FET阻抗变换成小于约5欧姆的前置放大器输入阻抗。

    Apparatus for feeding a magnetic resonance coil element and method of making same
    6.
    发明授权
    Apparatus for feeding a magnetic resonance coil element and method of making same 有权
    用于馈送磁共振线圈元件的装置及其制造方法

    公开(公告)号：US08207736B2

    公开(公告)日：2012-06-26

    申请号：US12570759

    申请日：2009-09-30

    申请人： Dashen Chu ,  Robert S. Stormont ,  Saban Kurucay ,  Scott A. Lindsay ,  Ricardo M. Matias ,  Anthony D. Defranco

    发明人： Dashen Chu ,  Robert S. Stormont ,  Saban Kurucay ,  Scott A. Lindsay ,  Ricardo M. Matias ,  Anthony D. Defranco

    IPC分类号： G01V3/00

    CPC分类号： G01R33/365 ,  G01R33/3621 ,  G01R33/3657

    摘要： A method, system, and apparatus including a magnetic resonance (MR) coil system that includes an MR coil element, a high input Pre-amplifier having a high input impedance field-effect-transistor (FET) with an impedance of one of substantially equal to 500 ohms and greater than 500 ohms, and a conductive path. The conductive path has a first end coupled to the MR coil element and a second end coupled to the high input Pre-amplifier such that the MR coil element is coupled in series with the high input Pre-amplifier. Further, the conductive path is free of a matching network intervening between the MR coil element and the high input Pre-amplifier.

    摘要翻译： 包括具有MR线圈元件的磁共振（MR）线圈系统的方法，系统和装置，具有高输入阻抗场效应晶体管（FET）的高输入前置放大器，其阻抗基本相等 至500欧姆且大于500欧姆，以及导电路径。 导电路径具有耦合到MR线圈元件的第一端和耦合到高输入前置放大器的第二端，使得MR线圈元件与高输入前置放大器串联耦合。 此外，导电路径没有介于MR线圈元件和高输入前置放大器之间的匹配网络。

    System and apparatus for a high resolution peripheral vascular coil array
    8.
    发明授权
    System and apparatus for a high resolution peripheral vascular coil array 有权
    用于高分辨率外周血管线圈阵列的系统和装置

    公开(公告)号：US07348778B2

    公开(公告)日：2008-03-25

    申请号：US10908490

    申请日：2005-05-13

    申请人： Dashen Chu ,  Ricardo Marcal Matias ,  Robert Steven Stormont ,  Fraser R. L. Robb

    发明人： Dashen Chu ,  Ricardo Marcal Matias ,  Robert Steven Stormont ,  Fraser R. L. Robb

    IPC分类号： G01V3/00

    CPC分类号： G01R33/3415 ,  G01R33/3678

    摘要： A peripheral vascular coil array for providing images of a region of interest includes a first section including a first coil array and a second coil array in electrical communication with each other. The first and second coil arrays are disposed at opposite sides of the region of interest to produce a magnetic field in the region of interest. Each of the first and second coil arrays includes a butterfly coil and a loop coil.

    摘要翻译： 用于提供感兴趣区域的图像的外周血管线圈阵列包括包括彼此电连通的第一线圈阵列和第二线圈阵列的第一部分。 第一和第二线圈阵列设置在感兴趣区域的相对侧，以在感兴趣的区域中产生磁场。 第一和第二线圈阵列中的每一个包括蝶形线圈和环形线圈。

    System and apparatus for receiving magnetic resonance (MR) signals from an imaging subject
    9.
    发明授权
    System and apparatus for receiving magnetic resonance (MR) signals from an imaging subject 有权
    用于从成像对象接收磁共振（MR）信号的系统和装置

    公开(公告)号：US09354287B2

    公开(公告)日：2016-05-31

    申请号：US11851961

    申请日：2007-09-07

    申请人： Robert S. Stormont ,  Dashen Chu

    发明人： Robert S. Stormont ,  Dashen Chu

    IPC分类号： A61B5/05 ,  G01R33/36 ,  A61B5/055

    CPC分类号： G01R33/365 ,  A61B5/055 ,  G01R33/3621

    摘要： An apparatus for receiving magnetic resonance (MR) signals emitted by an imaging subject includes a receiver coil configured to detect the MR signals and a frequency translating preamplifier coupled to the receiver coil. The frequency translating preamplifier is configured to amplify the MR signals and to convert a frequency of the MR signals to an intermediate frequency. The frequency translating preamplifier may include an amplifier having a predefined gain, a frequency filter configured to filter at least one predetermined frequency and a mixer configured to convert the frequency of the MR signals to the intermediate frequency.

    摘要翻译： 用于接收由成像对象发射的磁共振（MR）信号的装置包括被配置为检测MR信号的接收器线圈和耦合到接收器线圈的频率转换前置放大器。 频率转换前置放大器被配置为放大MR信号并将MR信号的频率转换为中频。 频率转换前置放大器可以包括具有预定增益的放大器，被配置为对至少一个预定频率进行滤波的频率滤波器和配置成将MR信号的频率转换为中频的混频器。