公开(公告)号：US20050083055A1

公开(公告)日：2005-04-21

申请号：US10756592

申请日：2004-01-13

Applicant: Dashen Chu ,  Ricardo Matias ,  Travis Monke ,  Phillip Steen ,  Fraser Robb

Inventor： Dashen Chu ,  Ricardo Matias ,  Travis Monke ,  Phillip Steen ,  Fraser Robb

IPC: G01R33/34 ,  A61B5/055 ,  G01R33/3415 ,  G01R33/36 ,  G01R33/54 ,  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：US20130093425A1

公开(公告)日：2013-04-18

申请号：US13276127

申请日：2011-10-18

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

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

IPC: G01R33/44 ,  H01F17/00 ,  H01F41/00 ,  H01F5/00

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。

公开(公告)号：US08362776B2

公开(公告)日：2013-01-29

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: G01V3/00

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：US20120319687A1

公开(公告)日：2012-12-20

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: G01R33/44

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：US20110074425A1

公开(公告)日：2011-03-31

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: G01R33/44

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：US07855559B2

公开(公告)日：2010-12-21

申请号：US12241257

申请日：2008-09-30

Applicant: Anthony D. DeFranco ,  Matthew M. Meiller ,  Robert S. Stormont ,  Dashen Chu ,  Paul D. Haig

Inventor： Anthony D. DeFranco ,  Matthew M. Meiller ,  Robert S. Stormont ,  Dashen Chu ,  Paul D. Haig

IPC: G01V3/00

CPC classification number: G01R33/3657

Abstract: A decoupling circuit for a radio frequency (RF) surface coil having a plurality of tuning capacitors includes at least two decoupling points and a DC source coupled to the at least two decoupling points. Each decoupling point is associated with one of the plurality of tuning capacitors. Each decoupling point includes a decoupling inductor connected in parallel with a tuning capacitor, a diode connected in series with the decoupling inductor and in parallel with the tuning capacitor, a resistor connected in parallel with the diode and at least one isolating inductor connected between the resistor and the diode to RF isolate the resistor. The value of the resistor in each decoupling point is selected to maintain a high quality factor (Q) of the RF surface coil and to reduce the switching speed of the decoupling circuit.

Abstract translation: 用于具有多个调谐电容器的射频（RF）表面线圈的去耦电路包括至少两个去耦点和耦合到该至少两个解耦点的DC源。 每个去耦点与多个调谐电容器中的一个相关联。 每个去耦点包括与调谐电容器并联连接的去耦电感器，与去耦电感器串联并与调谐电容器并联的二极管，与二极管并联连接的电阻器和连接在电阻器之间的至少一个隔离电感器 并且二极管以RF隔离电阻。 选择每个去耦点中的电阻器的值以保持RF表面线圈的高质量因子（Q）并降低去耦电路的开关速度。

公开(公告)号：US20100079139A1

公开(公告)日：2010-04-01

申请号：US12241257

申请日：2008-09-30

Applicant: Anthony D. DeFranco ,  Matthew M. Meiller ,  Robert S. Stormont ,  Dashen Chu ,  Paul D. Haig

Inventor： Anthony D. DeFranco ,  Matthew M. Meiller ,  Robert S. Stormont ,  Dashen Chu ,  Paul D. Haig

IPC: G01R33/44

CPC classification number: G01R33/3657

Abstract: A decoupling circuit for a radio frequency (RF) surface coil having a plurality of tuning capacitors includes at least two decoupling points and a DC source coupled to the at least two decoupling points. Each decoupling point is associated with one of the plurality of tuning capacitors. Each decoupling point includes a decoupling inductor connected in parallel with a tuning capacitor, a diode connected in series with the decoupling inductor and in parallel with the tuning capacitor, a resistor connected in parallel with the diode and at least one isolating inductor connected between the resistor and the diode to RF isolate the resistor. The value of the resistor in each decoupling point is selected to maintain a high quality factor (Q) of the RF surface coil and to reduce the switching speed of the decoupling circuit.

Abstract translation: 用于具有多个调谐电容器的射频（RF）表面线圈的去耦电路包括至少两个去耦点和耦合到该至少两个解耦点的DC源。 每个去耦点与多个调谐电容器中的一个相关联。 每个去耦点包括与调谐电容器并联连接的去耦电感器，与去耦电感器串联并与调谐电容器并联的二极管，与二极管并联连接的电阻器和连接在电阻器之间的至少一个隔离电感器 并且二极管以RF隔离电阻。 选择每个去耦点中的电阻器的值以保持RF表面线圈的高质量因子（Q）并降低去耦电路的开关速度。

公开(公告)号：US20060255804A1

公开(公告)日：2006-11-16

申请号：US11129197

申请日：2005-05-13

Applicant: Dashen Chu ,  Ricardo Matias ,  Robert Stormont

Inventor： Dashen Chu ,  Ricardo Matias ,  Robert Stormont

IPC: G01V3/00

CPC classification number: G01R33/3678

Abstract: The present invention provides for a multiple station RF coil array comprised of multiple three concentric surface coil arrays for achieving a large field of view and high imaging resolution. Yet another embodiment of the invention provides for an RF coil array comprising three coil elements without sharing the same plane.

Abstract translation: 本发明提供了一种由多个三个同心面线圈阵列组成的多站RF线圈阵列，用于实现大的视场和高的成像分辨率。 本发明的另一个实施例提供一种包括三个线圈元件而不共享同一平面的RF线圈阵列。

公开(公告)号：US20060255803A1

公开(公告)日：2006-11-16

申请号：US10908490

申请日：2005-05-13

Applicant: Dashen Chu ,  Ricardo Matias ,  Robert Stormont ,  Fraser Robb

Inventor： Dashen Chu ,  Ricardo Matias ,  Robert Stormont ,  Fraser 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。