公开(公告)号：US09018955B2

公开(公告)日：2015-04-28

申请号：US13163440

申请日：2011-06-17

Applicant: Dashen Chu ,  Robert Stormont ,  Scott Lindsay ,  Ricardo Matias

Inventor： Dashen Chu ,  Robert Stormont ,  Scott Lindsay ,  Ricardo Matias

IPC: G01R33/36

CPC classification number: G01R33/365 ,  G01R33/3621

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US06975115B1

公开(公告)日：2005-12-13

申请号：US10164664

申请日：2002-06-07

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

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

IPC: G01R33/3415 ,  G01V3/00

CPC classification number: G01R33/3415

Abstract: A partially parallel acquisition RF coil array for imaging a sample includes at least a first, a second and a third coil adapted to be arranged circumambiently about the sample and to provide both contrast data and spatial phase encoding data.

Abstract translation: 用于对样本进行成像的部分平行采集RF线圈阵列包括至少第一，第二和第三线圈，其适于围绕样本周边布置并提供对比度数据和空间相位编码数据。

公开(公告)号：US07109710B2

公开(公告)日：2006-09-19

申请号：US10756592

申请日：2004-01-13

Applicant: Dashen Chu ,  Recardo Matias ,  Travis Monke ,  Phillip E. Steen ,  Fraser J. L. Robb

Inventor： Dashen Chu ,  Recardo Matias ,  Travis Monke ,  Phillip E. Steen ,  Fraser J. L. Robb

IPC: G01V3/00

CPC classification number: G01R33/54 ,  G01R33/3415

Abstract: A method and apparatus is disclosed to analogically combine MR signals from RF coils to form multiple sets of analogically combined MR signals, and then digitally combine the analogically combined sets of MR signals to provide a digitized signal set for image reconstruction. The analogical combining followed by the digital combining of acquired MR signals improves intrinsic SNR of the RF coils used for data acquisition from a field-of-view (FOV) without compromising FOV for simultaneous MR data acquisition.

Abstract translation: 公开了一种方法和装置，以模拟地组合来自RF线圈的MR信号以形成多组模拟组合MR信号，然后数字地组合MR信号的模拟组合以提供用于图像重建的数字化信号集。 所采用的MR信号的数字组合之后的模拟组合提高了用于从视场（FOV）进行数据采集的RF线圈的固有SNR，而不会影响同时MR数据采集的FOV。

公开(公告)号：US06930480B1

公开(公告)日：2005-08-16

申请号：US10187353

申请日：2002-06-28

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

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

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

CPC classification number: G01R33/34046 ,  G01R33/5611

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US08207736B2

公开(公告)日：2012-06-26

申请号：US12570759

申请日：2009-09-30

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

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

IPC: G01V3/00

CPC classification number: G01R33/365 ,  G01R33/3621 ,  G01R33/3657

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US20110074415A1

公开(公告)日：2011-03-31

申请号：US12570807

申请日：2009-09-30

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

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

IPC: G01R33/48 ,  G01R33/44

CPC classification number: G01R33/3415 ,  G01R33/3621 ,  G01R33/3635 ,  G01R33/365

Abstract: A method, system, and apparatus including a radio-frequency (RF) phased coil array for a magnetic resonance (MR) imaging apparatus that includes a first RF coil element tuned to a first frequency and configured to receive MR signals and a second RF coil element tuned to a second frequency different than the first frequency and configured to receive MR signals.

Abstract translation: 一种包括用于磁共振（MR）成像装置的射频（RF）相控线圈阵列的方法，系统和装置，其包括被调谐到第一频率并被配置为接收MR信号的第一RF线圈元件和第二RF线圈 元件调谐到与第一频率不同的第二频率并被配置为接收MR信号。

公开(公告)号：US07348778B2

公开(公告)日：2008-03-25

申请号：US10908490

申请日：2005-05-13

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

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

IPC: G01V3/00

CPC classification number: G01R33/3415 ,  G01R33/3678

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US06900635B1

公开(公告)日：2005-05-31

申请号：US10320997

申请日：2002-12-17

Applicant: Labros S. Petropoulos ,  Hiroyuki Fujita ,  Mark Xueming Zou ,  Yun-Jeong Yang ,  Dan K. Spence ,  Joseph Murphy-Boesch ,  Pei H. Chan ,  Dashen Chu

Inventor： Labros S. Petropoulos ,  Hiroyuki Fujita ,  Mark Xueming Zou ,  Yun-Jeong Yang ,  Dan K. Spence ,  Joseph Murphy-Boesch ,  Pei H. Chan ,  Dashen Chu

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

CPC classification number: G01R33/34046 ,  G01R33/5611

Abstract: A partially parallel acquisition RF coil array for imaging a human head having a summit and a lower portion includes at least a first, a second and a third quadrature coil pair adapted to be arranged circumambiently about the lower portion of the head; and at least a forth, a fifth and a sixth quadrature coil pair adapted to be conformably arranged about the summit of the head.

Abstract translation: 用于对具有顶部和下部的人头进行成像的部分平行采集RF线圈阵列包括至少第一，第二和第三正交线圈对，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第四，第五和第六正交线圈对。

公开(公告)号：US09354287B2

公开(公告)日：2016-05-31

申请号：US11851961

申请日：2007-09-07

Applicant: Robert S. Stormont ,  Dashen Chu

Inventor： Robert S. Stormont ,  Dashen Chu

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

CPC classification number: G01R33/365 ,  A61B5/055 ,  G01R33/3621

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US09000766B2

公开(公告)日：2015-04-07

申请号：US13276127

申请日：2011-10-18

Applicant: Dashen Chu ,  Robert Stormont ,  Scott Lindsay ,  Ricardo Mathias ,  Craig Culver

Inventor： Dashen Chu ,  Robert Stormont ,  Scott Lindsay ,  Ricardo Mathias ,  Craig Culver

IPC: G01R33/44 ,  H01F17/00 ,  H01F41/00 ,  H01F5/00 ,  G01R33/34 ,  G01R33/36 ,  G01R33/3415

CPC classification number: G01R33/34084 ,  G01R33/34007 ,  G01R33/3415 ,  G01R33/365 ,  Y10T29/4902

Abstract: A radio frequency (RF) coil array that includes an RF coil support structure, and a plurality of RF coils coupled to the RF coil support structure, the RF coil support structure configured to enable the plurality of RF coils to be positioned in an underlap configuration and repositioned to an overlap configuration. A medical imaging system and a method of manufacturing the RF coil array are also described herein.

Abstract translation: 包括RF线圈支撑结构的射频（RF）线圈阵列和耦合到RF线圈支撑结构的多个RF线圈，所述RF线圈支撑结构被配置为使得所述多个RF线圈能够被定位在底部配置 并重新定位到重叠配置。 本文还描述了医疗成像系统和RF线圈阵列的制造方法。