公开(公告)号：WO2014133548A1

公开(公告)日：2014-09-04

申请号：PCT/US2013/028673

申请日：2013-03-01

Applicant: HALLIBURTON ENERGY SERVICES, INC.

Inventor： CHEN, Songhua ,  JACHMANN, Rebecca, Corina

IPC: G01N24/08

CPC classification number: G01R33/302 ,  G01N24/081 ,  G01R33/305 ,  G01R33/3678 ,  G01R33/383 ,  G01R33/422 ,  G01R33/448

Abstract: A nuclear magnetic resonance (NMR) sample analyzer has a plurality of NMR units arrayed in a predetermined relationship to each other. Each of the NMR units includes a sample chamber having a sensitive volume for containing a sample to be analyzed; a radio frequency (RF) transmitting and receiving device proximal the sample chamber; and a magnet surrounding the RF transmitting and receiving device and sample chamber for generating a substantially uniform magnetic field within the sensitive volume and substantially no magnetic field beyond an outside wall of the magnet.

Abstract translation: 核磁共振（NMR）样品分析仪具有以预定关系彼此排列的多个NMR单元。 每个NMR单元包括具有用于容纳要分析的样品的灵敏体积的样品室; 位于样品室附近的射频（RF）发射和接收装置; 以及围绕RF发射和接收装置和样品室的磁体，用于在敏感体积内产生基本均匀的磁场，并且基本上不超过磁体外壁的磁场。

公开(公告)号：WO2007062227A3

公开(公告)日：2009-05-07

申请号：PCT/US2006045444

申请日：2006-11-27

Applicant: MR INSTR INC ,  VAUGHAN JOHN THOMAS JR ,  WATSON MARK ,  BRADSHAW KENNETH ,  WAKS MATTHEW ,  HOLWELL JOSHUA

Inventor： VAUGHAN JOHN THOMAS JR ,  WATSON MARK ,  BRADSHAW KENNETH ,  WAKS MATTHEW ,  HOLWELL JOSHUA

IPC: G01V3/00

CPC classification number: G01R33/34046 ,  G01R33/3453 ,  G01R33/3678

Abstract: An magnetic resonance apparatus in embodiments of the invention may include one or more of the following features: (a) a coil having at least two sections, (b) the at least two sections having a resonant circuit, (c) the at least two sections being reactively coupled or decoupled, (d) the at least two sections being separable, (e) the coil having openings allowing a subject to see or hear and to be accessed through the coil, (f) a cushioned head restraint, and (g) a subject inpul/output device providing visual data to the subject, the input/output device being selected from the group consisting of mirrors, prisms, video monitors, LCD devices, and optical motion trackers.

Abstract translation: 在本发明的实施例中的磁共振装置可以包括以下特征中的一个或多个：（a）具有至少两个部分的线圈，（b）所述至少两个部分具有谐振电路，（c）所述至少两个部分 （d）所述至少两个部分是可分离的，（e）所述线圈具有允许受试者看到或听到并通过所述线圈进入的开口，（f）缓冲的头枕，和 g）向对象提供视觉数据的主题插入/输出设备，所述输入/输出设备从由镜子，棱镜，视频监视器，LCD设备和光学运动跟踪器组成的组中选择。

公开(公告)号：WO2009044361A2

公开(公告)日：2009-04-09

申请号：PCT/IB2008/054030

申请日：2008-10-02

Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V. ,  PHILIPS INTELLECTUAL PROPERTY & STANDARDS GMBH ,  WEISS, Steffen

Inventor： WEISS, Steffen

CPC classification number: G01R33/287 ,  G01R33/3678 ,  G01R33/3692

Abstract: The invention relates to a system (1) for MR imaging of a body (14) placed in an examination volume (7). The system (1) comprises means (2) for establishing a substantially homogeneous main magnetic field in the examination volume, means (3, 4, 5) for generating switched magnetic field gradients superimposed upon the main magnetic field, transmission means for radiating RF signals towards the body (14), control means (20) for controlling the generation of the magnetic field gradients and the RF signals, means (17) for receiving and sampling MR signals, reconstruction means (21) for forming MR images from the signal samples, and auxiliary means (23) having an RF antenna (24) for receiving RF signals generated by the transmission means. In order to provide an MR system that enables a safe, reliable and non-interfering transmission of signals and/or power to the auxiliary means (23) located within the examination volume (7), the invention proposes that the system (1) is arranged to generate circularly polarised RF signals via the transmission means, which RF signals have a selectable sense of rotation.

Abstract translation: 本发明涉及一种用于放置在检查体积（7）中的身体（14）的MR成像的系统（1）。 系统（1）包括用于在检查体积中建立基本均匀的主磁场的装置（2），用于产生叠加在主磁场上的开关磁场梯度的装置（3,4,5），用于辐射RF信号的传输装置 朝向身体（14），用于控制磁场梯度和RF信号的产生的控制装置（20），用于接收和采样MR信号的装置（17），用于从信号样本形成MR图像的重建装置（21） 和具有用于接收由发送装置产生的RF信号的RF天线（24）的辅助装置（23）。 为了提供能够对位于检查体积（7）内的辅助装置（23）进行信号和/或功率的安全，可靠和不干扰的MR系统，本发明提出系统（1）是 被布置成经由传输装置产生圆偏振RF信号，该RF信号具有可选择的旋转感。

公开(公告)号：WO2005072250A3

公开(公告)日：2006-01-19

申请号：PCT/US2005000192

申请日：2005-01-06

Applicant: WORCESTER POLYTECH INST ,  LUDWIG REINHOLD ,  BOGDANOV GENE ,  OBI AGHOGHO

Inventor： LUDWIG REINHOLD ,  BOGDANOV GENE ,  OBI AGHOGHO

IPC: G01R33/341 ,  G01V3/00

CPC classification number: G01R33/3678

Abstract: Multi-modal coils for coupling MRI RF signals from an anatomical region(s) to be imaged. The coil includes a segmented annular base ring conductor including a plurality of capacitances disposed between the segments, and at least one arcuate conductor symmetrically connected at each end to the base ring, one end terminating in direct contact with the base ring, the other end electrically connected to the base ring via two of the capacitive electrical connections. The RF coil is operable in multiple receiving modes in phase quadrature to establish a rotating magnetic field phasor orthogonal to the temporally constant uniform magnetic field of the magnetic resonance instrument. The RF coil can be combined with a second RF coil to simultaneously image two anatomical regions.

Abstract translation: 用于耦合待成像的解剖区域的MRI RF信号的多模式线圈。 线圈包括分段的环形基环导体，其包括设置在所述段之间的多个电容，以及至少一个弓形导体，每个端部对称地连接到所述基环，一端终止于与所述基环直接接触，所述另一端电连接 通过两个电容电连接连接到基座环。 RF线圈以相位正交的多个接收模式操作，以建立与磁共振仪器的时间上恒定的均匀磁场正交的旋转磁场相量。 RF线圈可以与第二RF线圈组合以同时成像两个解剖区域。

公开(公告)号：WO2004038442A3

公开(公告)日：2004-08-26

申请号：PCT/US0333316

申请日：2003-10-21

Applicant: GEN HOSPITAL CORP ,  ACKERMAN JEROME L ,  WEDEEN VAN J

Inventor： ACKERMAN JEROME L ,  WEDEEN VAN J

IPC: G01R33/28 ,  G01R33/34

CPC classification number: G01R33/287 ,  G01R33/34046 ,  G01R33/34084 ,  G01R33/3628 ,  G01R33/3657 ,  G01R33/3678 ,  G01R33/422

Abstract: In one aspect, the present invention provides a cylindrical meanderline coil that can significantly improve the performance and usefulness of nuclear magnetic resonance (NMR) catheter radiofrequency (RF) coils by shaping the spatial dimensions of the volume of excitation and reception of signal. This can provide improved accuracy in defining the volume of excitation and reception of the subject or specimen, and increase the signal to noise ratio of a received signal. In another aspect, the invention provides an intravascular catheter having a coil at its tip for generating and/or detecting magnetic excitations. A preamplifer coupled to the catheter in proximity of the coil allows amplifying signals generated and/or detected by the coil. Although in one application, a coil and/or a catheter of the invention can be employed, for example, for MR spectroscopy or imaging of biological tissue, such as atherosclerotic plaques arterial walls in the human body, the invention provides similar advantages in any situation where a magnetic resonance or other magnetic induction signal is to be received from a thin cylindrical shell or sector of a cylindrical shell.

Abstract translation: 在一个方面，本发明提供一种圆柱形曲折线圈，其可以通过整形信号的激励和接收体积的空间尺寸来显着提高核磁共振（NMR）导管射频（RF）线圈的性能和有用性。 这可以提供确定对象或样本的激发和接收的量的改进的精度，并且增加接收信号的信噪比。 在另一方面，本发明提供一种血管内导管，其在其尖端具有线圈以产生和/或检测磁激励。 耦合到线圈附近的导管的前置放大器允许放大由线圈产生和/或检测的信号。 尽管在一个应用中，本发明的线圈和/或导管可以用于例如用于MR光谱学或生物组织成像，例如人体动脉粥样硬化斑块动脉壁，本发明在任何情况下提供类似的优点 其中磁性谐振或其他磁感应信号将从圆柱形壳体的薄圆柱形壳体或扇形区域接收。

公开(公告)号：WO2004038442A2

公开(公告)日：2004-05-06

申请号：PCT/US2003/033316

申请日：2003-10-21

Applicant: THE GENERAL HOSPITAL CORPORATION D/B/A MASSACHUSETTS GENERAL HOSPITAL ,  ACKERMAN, Jerome, L. ,  WEDEEN, Van, J.

Inventor： ACKERMAN, Jerome, L. ,  WEDEEN, Van, J.

IPC: G01R33/28

CPC classification number: G01R33/287 ,  G01R33/34046 ,  G01R33/34084 ,  G01R33/3628 ,  G01R33/3657 ,  G01R33/3678 ,  G01R33/422

Abstract: In one aspect, the present invention provides a cylindrical meanderline coil that can significantly improve the performance and usefulness of nuclear magnetic resonance (NMR) catheter radiofrequency (RF) coils by shaping the spatial dimensions of the volume of excitation and reception of signal. This can provide improved accuracy in defining the volume of excitation and reception of the subject or specimen, and increase the signal to noise ratio of a received signal. In another aspect, the invention provides an intravascular catheter having a coil at its tip for generating and/or detecting magnetic excitations. A preamplifer coupled to the catheter in proximity of the coil allows amplifying signals generated and/or detected by the coil. Although in one application, a coil and/or a catheter of the invention can be employed, for example, for MR spectroscopy or imaging of biological tissue, such as atherosclerotic plaques arterial walls in the human body, the invention provides similar advantages in any situation where a magnetic resonance or other magnetic induction signal is to be received from a thin cylindrical shell or sector of a cylindrical shell.

Abstract translation: 在一个方面，本发明提供一种圆柱形曲折线圈，其可以通过整形信号的激励和接收体积的空间尺寸来显着提高核磁共振（NMR）导管射频（RF）线圈的性能和有用性。 这可以提供确定对象或样本的激发和接收的量的改进的精度，并且增加接收信号的信噪比。 在另一方面，本发明提供一种血管内导管，其在其尖端具有线圈以产生和/或检测磁激励。 耦合到线圈附近的导管的前置放大器允许放大由线圈产生和/或检测的信号。 尽管在一个应用中，本发明的线圈和/或导管可用于例如用于MR光谱学或生物组织的成像，例如人体动脉粥样硬化斑块动脉壁，本发明在任何情况下提供类似的优点 其中磁性谐振或其他磁感应信号将从圆柱形壳体的薄圆柱形壳体或扇形区域接收。

公开(公告)号：WO02041020A2

公开(公告)日：2002-05-23

申请号：PCT/EP2001/013259

申请日：2001-11-14

IPC: G01R33/34 ,  A61B5/055 ,  G01R33/341 ,  G01R33/422 ,  H01F5/00 ,  G01R33/00

CPC classification number: G01R33/3678 ,  G01R33/422

Abstract: The invention relates to a flat quadrature RF surface resonator for a vertical field MRI magnet. Various steps are proposed so as to achieve a desired variation of the field strength. These steps concern the selection of the number, the shape and the length of radially extending conductor structures (30x, 31x, 32x, 33x; 40x, 41x, 42x, 43x) as well as of conductor loops (310 to 390; 410 to 490) for the return current, the shape of RF shields (12, 13) and the insertion of capacitive elements (Cix, Cax) between the conductor structures and the conductor loops on the one side and a reference potential on the other side, and also capacitive elements (Clx) in the conductor structures and/or conductor loops. Finally, a desirable variation of the field strength can also be achieved by the separation of parts of the surface resonator by means of switchable diodes (Dx).

Abstract translation: 本发明涉及用于垂直磁场MRI磁体的平面正交RF表面谐振器。 提出了各种步骤，以实现场强的期望变化。 这些步骤涉及径向延伸的导体结构（30x，31x，32x，33x; 40x，41x，42x，43x）以及导体环（310至390,410至490）的数量，形状和长度的选择 ），RF屏蔽（12,13）的形状以及在一侧的导体结构和导体环之间的电容元件（Cix，Cax）的插入以及另一侧的基准电位，以及 导体结构和/或导体环中的电容元件（Clx）。 最后，也可以通过借助于可切换二极管（Dx）分离表面谐振器的部分来实现场强的理想变化。

公开(公告)号：WO9927846A3

公开(公告)日：1999-07-22

申请号：PCT/IB9802111

申请日：1998-11-25

Applicant: HITACHI MEDICAL CORP

Inventor： RICHARD MARK ADRIAN ,  KORMOS DONALD WILLIAM

IPC: G01R33/36 ,  A61B5/055 ,  G01R33/34 ,  G01R33/341

CPC classification number: G01R33/34084 ,  G01R33/34053 ,  G01R33/34069 ,  G01R33/3678

Abstract: A coil assembly for use in MRI imaging includes a harness (26) having a base (28). First and second arm members (30a) extend from a first side of the base and above and over the base and third and fourth arm members (30b) extend from a second side of the base and above and over the base. A first cross member (34a) extends between the first arm member and the second arm member and a second cross member (34b) extends between the third arm member and the fourth arm member. An end of the first arm member is aligned with and detachably connected to an end of the third arm member and an end of the second arm member is aligned with and detachably connected to an end of the fourth arm member. First and second coil members each extend along the harness. The first coil member may be a saddle coil and the second coil member may be a solenoid coil configured to establish a quadrature arrangement.

Abstract translation: 用于MRI成像的线圈组件包括具有基座（28）的线束（26）。 第一和第二臂构件（30a）从基座的第一侧和基座的上方延伸，第三和第四臂构件（30b）从基座的第二侧和基部的上方延伸。 第一横向构件（34a）在第一臂构件和第二臂构件之间延伸，并且第二横向构件（34b）在第三臂构件和第四臂构件之间延伸。 第一臂构件的端部与第三臂构件的端部对准并可拆卸地连接，并且第二臂构件的端部与第四臂构件的端部对准并可拆卸地连接。 第一和第二线圈构件各自沿着线束延伸。 第一线圈构件可以是鞍形线圈，并且第二线圈构件可以是构造成建立正交布置的螺线管线圈。

公开(公告)号：WO99015914A1

公开(公告)日：1999-04-01

申请号：PCT/IL1998/000463

申请日：1998-09-24

IPC: A61B5/055 ,  G01R33/34 ,  G01R33/38 ,  G01R33/383 ,  G01R33/385 ,  H01F1/00 ,  H01F7/02 ,  G01V3/00

CPC classification number: G01R33/3806 ,  G01R33/34061 ,  G01R33/341 ,  G01R33/3678 ,  G01R33/383 ,  G01R33/385 ,  G01R33/3858 ,  G01R33/422 ,  H01F7/0278

Abstract: A MRI probe (150) includes two permanent magnet assemblies (162 and 164). The permanent magnet assemblies produce a region of substantially homogeneous magnetic field (114). Probe (150) also includes multi-layer printed circuit assemblies (172 and 174) that produce X, Y and Z gradient fields and shim currents.

Abstract translation: MRI探头（150）包括两个永磁体组件（162和164）。 永磁体组件产生基本上均匀的磁场（114）的区域。 探头（150）还包括产生X，Y和Z梯度场和垫片电流的多层印刷电路组件（172和174）。

公开(公告)号：WO98038732A1

公开(公告)日：1998-09-03

申请号：PCT/CA1998/000148

申请日：1998-02-27

IPC: G01R33/36 ,  H03D7/16 ,  H03H19/00 ,  H03D7/00

CPC classification number: H03D7/163 ,  G01R33/3607 ,  G01R33/3621 ,  G01R33/3678 ,  H03D7/166

Abstract: A circuit is disclosed which can be used in quadrature analysis of modulated waveform, in a modulation system for generating the waveform or in a filter circuit which uses both demodulation and modulation. The demodulation system generates in-phase and quadrature-phase values respectively of the waveform, by repeatedly sampling in respective ones of a plurality of sampling time periods an amplitude of the waveform and generating a series of sequential output values dependent upon the sampled amplitude, with each output value being associated with a respective one of the sampling time periods. The sampling means comprises a switch which is responsive to a periodic timing signal to determine said sampling time periods. Further switches are provided for switching communication of the output values for switched time periods alternately between output terminals, the switches also being responsive to a periodic timing signal to determine said switched time periods. The timing signals are generated such that the sampling switch is actuated such that each sampling time period is shorter than the respective switched time period, commences after the start time of the respective switched time period and ceases prior to the end time of the respective switched time period.

Abstract translation: 公开了可用于调制波形的正交分析的电路，用于产生波形的调制系统或使用解调和调制的滤波电路。 解调系统分别产生波形的同相和正交相位值，通过在多个采样周期中的相应的采样周期中对波形的振幅进行反复采样，并根据采样幅度产生一系列顺序输出值， 每个输出值与采样时间段中的相应一个相关联。 采样装置包括响应于周期性定时信号以确定所述采样时间段的开关。 提供了另外的开关，用于交替地在输出端子之间交换切换时间段的输出值的通信，开关还响应于周期性定时信号来确定所述切换的时间段。 生成定时信号，使得采样开关被致动使得每个采样时间段比相应的切换时间段短，在相应的切换时间段的开始时间之后开始，并且在相应的切换时间的结束时间之前停止 期。