公开(公告)号：US20170315187A1

公开(公告)日：2017-11-02

申请号：US15653911

申请日：2017-07-19

申请人： TOSHIBA MEDICAL SYSTEMS CORPORATION

发明人： Masaaki UMEDA ,  Takahiro ISHIHARA

IPC分类号： G01R33/36 ,  G01R33/565 ,  G01R33/561 ,  G01R33/24

CPC分类号： G01R33/3628 ,  G01R33/246 ,  G01R33/3678 ,  G01R33/5612 ,  G01R33/5659

摘要： A magnetic resonance imaging apparatus includes an imaging unit configured to carry out magnetic resonance imaging of a patient using a transmitting QD coil that allows at least one of phase and amplitude of a radio-frequency transmit pulse on at least one input channel of the transmitting QD coil to be adjusted independently of each other, and an adjustment unit arranged to adjust at least one of the phase and the amplitude of the radio-frequency transmit pulse according to imaging conditions.

公开(公告)号：US09753105B2

公开(公告)日：2017-09-05

申请号：US14229896

申请日：2014-03-29

申请人： Hou Quan Lin ,  Yu Tang ,  JianMin Wang ,  Qiu Yi Zhang

发明人： Hou Quan Lin ,  Yu Tang ,  JianMin Wang ,  Qiu Yi Zhang

IPC分类号： G01V3/00 ,  G01R33/36 ,  G01R33/34

CPC分类号： G01R33/365 ,  G01R33/34046 ,  G01R33/3678

摘要： A debugging device for a body coil of a magnetic resonance imaging (MRI) system includes a pair of output ports connected to a pair of input ports of the body coil. The debugging device also includes a pair of input ports connected to a pair of output ports of the MRI system. The debugging device includes a pair of extension circuits, separately connected between the pair of input ports and the pair of output ports; and a first adjustment capacitor for reducing or eliminating coupling between the pair of input ports. The first adjustment capacitor is bridged between the pair of input ports, and the capacitance of the first adjustment capacitor is variable.

公开(公告)号：US09588196B2

公开(公告)日：2017-03-07

申请号：US13977930

申请日：2011-12-27

申请人： Paul Royston Harvey ,  Wilhelmus Reinerius Maria Mens

发明人： Paul Royston Harvey ,  Wilhelmus Reinerius Maria Mens

IPC分类号： G01V3/00 ,  G01R33/34 ,  G01R33/36 ,  G01R33/561 ,  G01R33/565

CPC分类号： G01R33/34 ,  G01R33/3678 ,  G01R33/5612 ,  G01R33/5659

摘要： The invention relates to a multi-channel (e.g. quadrature) MRI transmit system in which RF power amplifiers having different power capabilities are used in different transmit channels. This results in reduced system costs, due to the avoidance of an unused excess of RF power capability when the power demand for obtaining a homogeneous B1-field (RF shimming) is asymmetric and the asymmetry is qualitatively the same for different imaging applications. The multi-channel transmit unit may also comprise a commutator which enables to selectively connect each RF power amplifier to each drive port of transmit coil arrangement (e.g. a birdcage coil).

摘要翻译： 本发明涉及一种多通道（例如正交）MRI发射系统，其中具有不同功率能力的RF功率放大器用于不同的发射信道。 这导致了当获得均匀B1场（RF匀场）的功率需求是不对称的且不对称性对于不同的成像应用在质量上是相同的时，由于避免了RF功率能力的未使用过量而导致系统成本降低。 多通道发射单元还可以包括换向器，其能够将每个RF功率放大器选择性地连接到发射线圈装置（例如鸟笼线圈）的每个驱动端口。

公开(公告)号：US09386939B1

公开(公告)日：2016-07-12

申请号：US12152139

申请日：2008-05-12

申请人： Lawrence A. Minkoff

发明人： Lawrence A. Minkoff

IPC分类号： A61B5/055 ,  G01R33/28 ,  G01R33/563 ,  G01R33/54 ,  G01R33/36 ,  G01R33/3415

CPC分类号： A61B5/0555 ,  A61B5/4561 ,  A61B5/4566 ,  G01R33/28 ,  G01R33/3415 ,  G01R33/3642 ,  G01R33/3657 ,  G01R33/3664 ,  G01R33/3678 ,  G01R33/54 ,  G01R33/56375 ,  G01R33/56383

摘要： In one aspect, the present invention is a method for detecting spinal abnormalities using magnet resonance imaging. The method comprises positioning a patient in an upright posture in an imaging volume of a magnet resonance imaging magnet with the spine of the patient adjacent to an antenna and capturing magnetic resonance imaging signals from a first portion of the patient's spine using the antenna with the patient positioned in a first position. The method may further comprise adjusting the patient position along a substantially vertical direction to a second position and capturing magnetic resonance imaging signals from a second portion of the patient's spine using the antenna with the patient positioned in the second position.

摘要翻译： 一方面，本发明是使用磁共振成像检测脊柱异常的方法。 该方法包括将患者以垂直姿势定位在磁体共振成像磁体的成像体积中，患者的脊柱与天线相邻，并且使用患者的天线从患者脊柱的第一部分捕获磁共振成像信号 位于第一位置。 该方法可以进一步包括沿着基本上垂直的方向将患者位置调整到第二位置，并且使用患者定位在第二位置的天线从患者脊柱的第二部分捕获磁共振成像信号。

公开(公告)号：US09274189B2

公开(公告)日：2016-03-01

申请号：US13512090

申请日：2010-11-29

申请人： Yoshihisa Soutome ,  Hideta Habara ,  Yoshitaka Bito ,  Hiroyuki Takeuchi ,  Tetsuhiko Takahashi ,  Hisaaki Ochi

发明人： Yoshihisa Soutome ,  Hideta Habara ,  Yoshitaka Bito ,  Hiroyuki Takeuchi ,  Tetsuhiko Takahashi ,  Hisaaki Ochi

IPC分类号： G01R33/34 ,  G01R33/48 ,  G01R33/345 ,  G01R33/36

CPC分类号： G01R33/34046 ,  G01R33/34053 ,  G01R33/34076 ,  G01R33/3453 ,  G01R33/3657 ,  G01R33/3678

摘要： There is provided a technique for securing a large examination space in a tunnel type MRI device without inviting increase of manufacturing cost and without significantly reducing irradiation efficiency or uniformity of the irradiation intensity distribution in an imaging region. Between rungs of a partially cylindrical RF coil, which coil corresponds to a cylindrical RF coil of which part is removed, there are disposed half-loops generating magnetic fields, which are synthesized with magnetic fields generated by loops constituted by adjacent rungs of the partially cylindrical RF coil and rings connecting the rungs to generate a circularly polarized or elliptically polarized magnetic field. Further, high-frequency signals of the same reference frequency having a desired amplitude ratio and phase difference are supplied to the partially cylindrical RF coils and half-loops.

摘要翻译： 提供了一种用于在隧道式MRI装置中确保大的检查空间的技术，而不会增加制造成本，并且不显着降低成像区域中的照射强度分布的照射效率或均匀性。 在部分圆柱形RF线圈的两个梯级之间，该线圈对应于部分被去除的圆柱形RF线圈，设置有产生磁场的半环，该磁场由具有由部分圆柱形的相邻梯级构成的环产生的磁场合成 RF线圈和环连接梯级以产生圆偏振或椭圆偏振磁场。 此外，具有期望幅度比和相位差的相同参考频率的高频信号被提供给部分圆柱形RF线圈和半环。

公开(公告)号：US08830008B2

公开(公告)日：2014-09-09

申请号：US13381363

申请日：2010-06-30

申请人： Bernard Darges

发明人： Bernard Darges

IPC分类号： H03C3/38 ,  H03F1/02 ,  H03F3/217 ,  G01R33/565 ,  G01R33/58 ,  G01R33/36

CPC分类号： H03F1/0294 ,  G01R33/3607 ,  G01R33/3614 ,  G01R33/3678 ,  G01R33/5659 ,  G01R33/583 ,  H03F1/0205 ,  H03F3/2176

摘要： A generator of a high-power modulated signal, a method for calibrating the generator, and a magnetic resonance imaging system. The generator includes means for generating a sinewave signal phase-shifted by a first variable value relative to a phase reference and a sinewave signal phase-shifted by a given fixed value added to a second variable value relative to the phase reference, the second variable value opposite to the first variable value relative to the phase reference, the variable values representative of the modulation of the radiofrequency signal, the two sinewave signals being of constant amplitude, two amplifiers each amplifying one of the sinewave signals in a congested regime, and a fixed phase shifter with a value equal to the given value of the means to generate the two sinewave signals, the fixed phase shifter coupling the signals originating from the two amplifiers to deliver the modulated radiofrequency signal.

摘要翻译： 高功率调制信号的发生器，用于校准发生器的方法和磁共振成像系统。 发生器包括用于产生相对于相位基准相移相位移第一可变值的正弦波信号和相对于相位基准相加于给定固定值相对于第二可变值的正弦波信号的第二变量值 与第一可变值相对于相位参考相反的变量值表示射频信号的调制，两个正弦波信号是恒定幅度，两个放大器各自放大拥塞状态下的正弦波信号之一，以及固定的 移相器具有等于用于产生两个正弦波信号的装置的给定值的值，固定移相器耦合来自两个放大器的信号以传送调制的射频信号。

公开(公告)号：US20130314091A1

公开(公告)日：2013-11-28

申请号：US13984855

申请日：2012-02-01

申请人： Yosuke Otake ,  Yoshihisa Soutome ,  Ryota Sato ,  Yoshitaka Bito ,  Koji Hirata

发明人： Yosuke Otake ,  Yoshihisa Soutome ,  Ryota Sato ,  Yoshitaka Bito ,  Koji Hirata

IPC分类号： G01R33/36

CPC分类号： G01R33/365 ,  G01R33/34053 ,  G01R33/34069 ,  G01R33/34076 ,  G01R33/3415 ,  G01R33/3635 ,  G01R33/3657 ,  G01R33/3678 ,  G01R33/422

摘要： To provide a technique for sufficiently eliminating magnetic coupling between RF coils and improving image quality when a multi-element multi-tuned RF coil is used as a receive RF coil for an MRI device. In the invention, each of RF coils which constitute a multi-element multi-tuned RF coil which is used as a receive RF coil for an MRI device is provided with an inter-coil magnetic coupling prevention circuit which resonates at each frequency to which each RF coil is tuned and provides a high impedance. The inter-coil magnetic coupling prevention circuit adjusts an inductor and a capacitor so that both of a circuit on the side of a pre-amplifier viewed from both ends of a signal reception circuit and a circuit on the side of the signal reception circuit viewed from both ends of a serial resonance circuit connected to the pre-amplifier resonate at a plurality of frequencies to which the respective RF coils are tuned.

摘要翻译： 提供一种用于充分消除RF线圈之间的磁耦合并且当多元素多调谐RF线圈用作MRI装置的接收RF线圈时提高图像质量的技术。 在本发明中，构成用作MRI装置的接收RF线圈的多元素多调谐RF线圈的每个RF线圈都设置有线圈间磁耦合防止电路，该电路在每个频率下共振， RF线圈被调谐并提供高阻抗。 线圈间磁耦合防止电路调整电感器和电容器，使得从信号接收电路的两端观看的前置放大器侧的电路和从信号接收电路侧观察的电路 连接到前置放大器的串联谐振电路的两端以相应的RF线圈调谐到的多个频率谐振。

公开(公告)号：US08560051B2

公开(公告)日：2013-10-15

申请号：US13112208

申请日：2011-05-20

申请人： Cameron Anthony Piron ,  Christopher Alexander Luginbuhl ,  Donald B. Plewes

发明人： Cameron Anthony Piron ,  Christopher Alexander Luginbuhl ,  Donald B. Plewes

IPC分类号： A47B13/00

CPC分类号： G01R33/3415 ,  A61B5/0035 ,  A61B5/415 ,  A61B5/418 ,  A61B5/4312 ,  A61B8/0825 ,  A61B8/0841 ,  A61B8/406 ,  A61B8/5238 ,  A61B90/11 ,  A61B90/14 ,  A61B90/17 ,  A61B2017/3411 ,  A61B2017/3413 ,  A61B2090/374 ,  A61B2562/17 ,  G01R33/34084 ,  G01R33/3678

摘要： Apparatus and method for using radio frequency coil systems for magnetic resonance imaging within an open architecture apparatus is provided. The MRI coil system includes a support structure with an open architecture in which secondary support structures, compression systems and plates containing RF coil systems may be introduced. These structures and RF coils can be moved relative to the patient, or removed entirely from the system. In one embodiment the system consists of a tabletop coil system, while another embodiment consists of a dedicated stretcher design.

摘要翻译： 提供了一种在开放式架构设备内使用射频线圈系统进行磁共振成像的装置和方法。 MRI线圈系统包括具有开放结构的支撑结构，其中可以引入包含RF线圈系统的辅助支撑结构，压缩系统和板。 这些结构和RF线圈可以相对于患者移动，或者完全从系统移除。 在一个实施例中，系统由桌面线圈系统组成，而另一实施例由专用的担架设计组成。

公开(公告)号：US20120306497A1

公开(公告)日：2012-12-06

申请号：US13577241

申请日：2011-01-26

申请人： Yukio Kaneko ,  Hideta Habara ,  Yoshihisa Soutome ,  Yosuke Otake ,  Hisaaki Ochi ,  Yoshitaka Bito

发明人： Yukio Kaneko ,  Hideta Habara ,  Yoshihisa Soutome ,  Yosuke Otake ,  Hisaaki Ochi ,  Yoshitaka Bito

IPC分类号： G01R33/34

CPC分类号： G01R33/5659 ,  G01R33/34076 ,  G01R33/3415 ,  G01R33/3657 ,  G01R33/3664 ,  G01R33/3678

摘要： There is provided a technique for improving quality of images obtained with an MRI apparatus by using the geometric structures of the conventional RF transmission coil and RF reception coil and without increasing burden on patients or MRI technicians. A conductor loop of an RF reception coil disposed between a subject and an RF transmission coil is used also as a loop for magnetic field adjustment in order to shield or enhance a rotating magnetic field B1 generated by the RF transmission coil. Further, the conductor loop operated as a conductor loop for magnetic field adjustment among the conductor loops constituting the RF reception coil is driven so that inhomogeneity of the rotating magnetic field B1 is reduced.

摘要翻译： 提供了一种通过使用常规RF传输线圈和RF接收线圈的几何结构来提高使用MRI装置获得的图像质量并且不增加患者或MRI技术人员负担的技术。 设置在被检体和RF传输线圈之间的RF接收线圈的导体环也用作用于磁场调整的环路，以便屏蔽或增强由RF传输线圈产生的旋转磁场B1。 此外，作为构成RF接收线圈的导体环路之间用于磁场调整的导体回路的导体回路被驱动，使得旋转磁场B1的不均匀性降低。

公开(公告)号：US20120293174A1

公开(公告)日：2012-11-22

申请号：US13110611

申请日：2011-05-18

申请人： VICTOR TARACILA ,  TAYLAN DALVEREN ,  DAVID BERENDT

发明人： VICTOR TARACILA ,  TAYLAN DALVEREN ,  DAVID BERENDT

IPC分类号： G01R33/44

CPC分类号： G01R33/34084 ,  A61B5/055 ,  G01R33/34069 ,  G01R33/3678

摘要： A Radio Frequency (RF) coil apparatus for generating a Magnetic Resonance (MR) image includes a body adapted to be worn by a subject being scanned, the body comprising an anterior portion, a posterior portion, and a transition portion coupled between the anterior and posterior portions, a first RF receive-only saddle coil including a first coil positioned in the anterior portion and a second coil positioned in the anterior portion, the first RF saddle coil configured to be positioned on the anterior and posterior sides of the subject. An MRI imaging system and method are also described herein.

摘要翻译： 用于产生磁共振（MR）图像的射频（RF）线圈装置包括适于被被扫描的被摄体佩戴的主体，所述主体包括前部，后部和过渡部， 后部，第一RF接收仅鞍形线圈，其包括位于前部中的第一线圈和位于前部中的第二线圈，所述第一RF鞍形线圈被配置为定位在所述对象的前侧和后侧。 本文还描述了MRI成像系统和方法。