公开(公告)号：US20120081115A1

公开(公告)日：2012-04-05

申请号：US13376615

申请日：2010-05-17

申请人： Arne Reykowski

发明人： Arne Reykowski

IPC分类号： G01R33/48 ,  G01R33/341

CPC分类号： G01R33/3415 ,  G01R33/3657 ,  G01R33/3664

摘要： A radiofrequency (RF) coil assembly (18,18′) for use in a magnetic resonance system (10) includes a radiofrequency coil (42) and a plurality of memory resistive elements (46,56,62,72) which each retains a selected resistive state after a control signal is removed. A detune circuit (44), part of the radiofrequency coil assembly, includes a memory resistive element (46) which switches the radiofrequency coil between a tuned and detuned state. Connected between the radiofrequency coil and a pre-amplifier (52), a blanking circuit (54) includes a memory resistive element (56) to short circuit an input of the pre-amplifier. A multiplexing circuit (60) includes a plurality of memory resistive elements (62) to selectively couple the selected outputs of the radiofrequency coils to a receiver (26). A biasing circuit (27) generates the control signal to set the memory resistive elements (46,56) to a first resistive state during a transmit mode and to a second resistive state during a receive mode magnetic resonance system.

摘要翻译： 用于磁共振系统（10）的射频（RF）线圈组件（18,18'）包括射频线圈（42）和多个存储电阻元件（46,56,62,72），每个存储电阻元件保持 控制信号被去除后选择的电阻状态。 射频线圈组件的一部分的失谐电路（44）包括在调谐和失谐状态之间切换射频线圈的存储电阻元件（46）。 消声电路（54）连接在射频线圈和前置放大器（52）之间，包括用于使前置放大器的输入短路的存储器电阻元件（56）。 多路复用电路（60）包括多个存储电阻元件（62），用于选择性地将所选射频线圈的输出耦合到接收器（26）。 偏置电路（27）产生控制信号，以在发射模式期间将存储电阻元件（46,56）设置为第一电阻状态，并在接收模式磁共振系统期间产生第二电阻状态。

公开(公告)号：US07608778B2

公开(公告)日：2009-10-27

申请号：US11679241

申请日：2007-02-27

申请人： Arne Reykowski

发明人： Arne Reykowski

IPC分类号： H01B11/06

CPC分类号： G01R33/36 ,  G01R33/288 ,  G01R33/3685

摘要： A coaxial cable comprises at least one internal conductor and a surrounding cable shield. A plurality of sheath wave barriers are arranged along the cable shield, each having two ends that are coupled to the cable shield at coupling points of the cable shield that are spaced from one another. The coaxial cable is exposed to a radio-frequency excitation field with an excitation frequency, due to which sheath waves can be excited on the cable shield. The excitation field is shielded from the at least one internal conductor via the cable shield. The sheath waves can be damped via the sheath wave barriers. A detection circuit is associated with at least one of the sheath wave barriers, from which detection circuit a measurement signal characteristic of a load of the respective sheath wave barrier due to the excitation field can be generated. The measurement signal can be tapped and evaluated.

摘要翻译： 同轴电缆包括至少一个内部导体和周围的电缆屏蔽。 沿着电缆屏蔽层布置多个鞘波屏障，每个护套波阻挡件具有两个端部，该端部在彼此间隔开的电缆屏蔽件的耦合点处联接到电缆屏蔽层。 同轴电缆暴露于具有激发频率的射频激励场，由此可以在电缆屏蔽层上激发鞘波。 励磁场通过电缆屏蔽与至少一个内部导体屏蔽。 护套波可以通过鞘波屏蔽来阻尼。 检测电路与至少一个护套波屏障相关联，从而可以产生检测电路由于激励场引起的相应护套波屏障的负载的测量信号特性。 可以对测量信号进行抽头和评估。

公开(公告)号：US07450984B2

公开(公告)日：2008-11-11

申请号：US10439123

申请日：2003-05-15

申请人： Karl Engelhard ,  Rainer Kuth ,  Arne Reykowski

发明人： Karl Engelhard ,  Rainer Kuth ,  Arne Reykowski

IPC分类号： A61B5/055 ,  G01V3/00

CPC分类号： G01R33/341 ,  G01R33/34084

摘要： A local coil arrangement for a magnetic resonance system has an antenna arrangement that is arranged in a retainer structure. The retainer structure has a waistband and a perineum element. A person to be examined dons the local coil arrangement like trousers.

摘要翻译： 用于磁共振系统的本地线圈装置具有布置在保持架结构中的天线装置。 保持架结构具有腰带和会阴元件。 一个被检查的人像裤子一样排在当地的线圈上。

公开(公告)号：US07432711B2

公开(公告)日：2008-10-07

申请号：US11540622

申请日：2006-09-29

申请人： Jian-Jun Du ,  Arne Reykowski ,  Markus Vester ,  Jian Min Wang

发明人： Jian-Jun Du ,  Arne Reykowski ,  Markus Vester ,  Jian Min Wang

IPC分类号： G01V3/00 ,  H01P7/00

CPC分类号： G01R33/3415 ,  G01R33/365

摘要： A coil arrangement for a magnetic resonance apparatus has a number of coil elements that are capable of being operated independently of one another and are situated around a common central area. Each coil element of the coil arrangement is capacitively or inductively decoupled from the coil elements of the coil arrangement that are immediately adjacent to this coil element. In the central area, there is situated a capacitor network that connects the coil elements of the coil arrangement to one another. The capacitor network is fashioned and dimensioned such that it at least reduces the coupling of each coil element of the coil arrangement to at least one additional coil element of the coil arrangement that is not immediately adjacent to the respective coil element.

摘要翻译： 用于磁共振装置的线圈装置具有能够彼此独立地操作并且位于公共中心区域周围的多个线圈元件。 线圈装置的每个线圈元件与线圈装置的线圈元件电容性地或电感地解耦，该线圈元件紧邻该线圈元件。 在中央区域中，设置有将线圈装置的线圈元件彼此连接的电容器网络。 电容器网络的形状和尺寸使得其至少将线圈装置的每个线圈元件的耦合减小到线圈装置的至少一个附加线圈元件，其不直接邻近相应的线圈元件。

公开(公告)号：US20070236219A1

公开(公告)日：2007-10-11

申请号：US11679235

申请日：2007-02-27

申请人： Michael Deimling ,  Arne Reykowski

发明人： Michael Deimling ,  Arne Reykowski

IPC分类号： G01V3/00 ,  A61B5/05

CPC分类号： H01Q23/00 ,  G01R33/34046 ,  G01R33/341 ,  G01R33/3628 ,  G01R33/3657 ,  H01Q1/22 ,  H01Q9/16 ,  H01Q21/20 ,  H01Q21/26

摘要： A radio-frequency antenna for acquisition of a magnetic resonance signal has two electrodes that are connected with one another via a discrete tuning device. The first radio-frequency antenna) is tuned to a resonance frequency by the tuning device. The tuning device has a first tuning element influencing the resonance frequency of the radio-frequency antenna and a second tuning element influencing the resonance frequency of the first radio-frequency antenna. The tuning elements are connected in series and fashioned as inductors. The radio-frequency antenna also has two tap points at which an acquisition signal representative of the acquired magnetic resonance signal is tapped and conducted away via feed lines. The tap points are respectively arranged between the electrodes and the tuning element and one of said tap points is between the first and second tuning elements.

摘要翻译： 用于获取磁共振信号的射频天线具有通过离散调谐装置彼此连接的两个电极。 第一个射频天线）通过调谐装置调谐到谐振频率。 调谐装置具有影响射频天线的谐振频率的第一调谐元件和影响第一射频天线的谐振频率的第二调谐元件。 调谐元件串联连接并形成为电感器。 射频天线还具有两个抽头点，在该点处，代表所获取的磁共振信号的采集信号被抽头并通过馈送线导通。 分接点分别布置在电极和调谐元件之间，并且所述抽头点中的一个位于第一和第二调谐元件之间。

公开(公告)号：US20140225613A1

公开(公告)日：2014-08-14

申请号：US14233274

申请日：2012-07-05

申请人： Arne Reykowski

发明人： Arne Reykowski

IPC分类号： G01R33/36

CPC分类号： G01R33/36 ,  G01R33/3628 ,  G01R33/3642 ,  G01R33/3692 ,  G01R33/5612 ,  G01R33/5659

摘要： A local radio frequency (RF) transmitting coil (26) of a magnetic resonance imaging system (5) has a plurality of coil elements (100). Each coil element (100) has an adjustable load (62) which is adjusted by a control unit (60) to adjust a transmitted B1 field distribution. The load can be adjusted to shim for a uniform B1 field distribution. Non-uniform B1 field distributions can be selected to perform magnetic resonance sequences that use such B1 field distributions, such as parallel imaging. The B1 field distribution can be changed during the magnetic resonance sequence to track a moving region of interest, time division multiplex parallel imaging, and the like.

摘要翻译： 磁共振成像系统（5）的本地射频（RF）发射线圈（26）具有多个线圈元件（100）。 每个线圈元件（100）具有可调负载（62），其由控制单元（60）调节以调整发送的B1场分布。 可以将负载调整为均匀的B1场分布。 可以选择不均匀的B1场分布来执行使用这样的B1场分布的磁共振序列，例如并行成像。 可以在磁共振序列期间改变B1场分布以跟踪感兴趣的移动区域，时分多路并行成像等。

公开(公告)号：US20120062233A1

公开(公告)日：2012-03-15

申请号：US13375490

申请日：2010-05-17

申请人： Arne Reykowski

发明人： Arne Reykowski

IPC分类号： G01R33/341 ,  H03F3/16

CPC分类号： H03F1/086 ,  H03F1/10 ,  H03F3/193

摘要： A preamplifier (46) comprises a field effect transistor (64) in common source configuration. While the gate of the field effect transistor is coupled to an amplifier input circuit (e.g. MRI coil), the drain of the field effect transistor (64) is coupled to an amplifier output. The preamplifier comprises furthermore a first (66) and a second (68) source-ground connection. The first source-ground lead (66) couples the source of the field effect transistor to the ground node of the amplifier input circuit, while the second source-ground lead (68) couples the source of the field effect transistor to the ground node of the amplifier output circuit. As a result, amplifier output currents generate basically a voltage drop across the second source-ground lead (68). Thus, the amplifier input circuit is less influenced by any common voltage drop across any common source-ground connection.

摘要翻译： 前置放大器（46）包括具有共同源配置的场效应晶体管（64）。 当场效应晶体管的栅极耦合到放大器输入电路（例如，MRI线圈）时，场效应晶体管（64）的漏极耦合到放大器输出端。 前置放大器还包括第一（66）和第二（68）源 - 接地连接。 第一源极 - 接地引线（66）将场效应晶体管的源极耦合到放大器输入电路的接地节点，而第二源极 - 接地引线（68）将场效应晶体管的源极耦合到 放大器输出电路。 结果，放大器输出电流基本上产生跨越第二源极 - 接地引线（68）的电压降。 因此，放大器输入电路较少受到任何公共源极 - 接地连接上的任何公共电压降的影响。

公开(公告)号：US07551147B2

公开(公告)日：2009-06-23

申请号：US11884978

申请日：2006-02-21

申请人： Arne Reykowski

发明人： Arne Reykowski

IPC分类号： H01Q9/30 ,  G01R33/34

CPC分类号： G01R33/34046 ,  G01R33/34053

摘要： An antenna for a magnetic resonance unit has a number of antenna rods arranged substantially regularly around an antenna axis, and being axially oriented relative to said antenna axis. Each antenna rod has two opposite ends with a central portion therebetween. The ends of each rod are electrically connected with the ends of at least one adjacent antenna rod by connecting elements oriented tangentially relative to the antenna axis. The rods are symmetrical relative to a plane of symmetry that proceeds perpendicularly relative to the antenna axis. Each point of each antenna rod defines a radial direction with the antenna axis, and the central portion defines a reference direction with respect to the antenna axis. Each radial direction forms a tangential angle with the reference direction, which is a non-constant function of the axial spacing of each point from the central portion of that rod.

摘要翻译： 用于磁共振单元的天线具有多个天线杆，天线杆基本上围绕天线轴线规则地布置，并且相对于所述天线轴线轴向定向。 每个天线杆具有两个相对端，其间具有中心部分。 每个杆的端部通过相对于天线轴线切向定向的连接元件与至少一个相邻的天线杆的端部电连接。 杆相对于垂直于天线轴线延伸的对称平面是对称的。 每个天线杆的每个点定义与天线轴线的径向方向，并且中心部分限定相对于天线轴线的参考方向。 每个径向方向与参考方向形成切线角，该角是从该杆的中心部分的每个点的轴向间隔的非常数函数。

公开(公告)号：US20090009414A1

公开(公告)日：2009-01-08

申请号：US12137714

申请日：2008-06-12

申请人： Arne Reykowski

发明人： Arne Reykowski

IPC分类号： H01Q11/12

CPC分类号： G01R33/3415 ,  G01R33/365 ,  H01Q1/521 ,  H01Q7/04 ,  H01Q21/061

摘要： An antenna array has multiple individual antennas arranged next to one another. The individual antennas are respectively arranged within a radio-frequency, closed conductor loop, with capacitors inserted in each conductor loop.

摘要翻译： 天线阵列具有彼此相邻布置的多个单独天线。 各个天线分别布置在射频闭合导体环路中，每个导体环路中插入电容器。

公开(公告)号：US07098659B2

公开(公告)日：2006-08-29

申请号：US10685883

申请日：2003-10-15

申请人： Arne Reykowski ,  Markus Vester

发明人： Arne Reykowski ,  Markus Vester

IPC分类号： G01V3/00

CPC分类号： G01R33/54

摘要： A reception unit for an MR device with at least two local antennas has a combination network to which the antennas are connected separately for combination of the antenna signals. The combination network generates at least two different modes that are linear combinations of the antenna signals, and at least two of which are present at an output of the combination network.

摘要翻译： 具有至少两个本地天线的MR设备的接收单元具有组合网络，天线单独连接到天线信号的组合。 组合网络生成作为天线信号的线性组合的至少两种不同模式，并且其中至少两个模式存在于组合网络的输出端。