专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明申请

US20080129292A1 Rf Coil System for Super High Field (Shf) Mri 有权
标题翻译：用于超高场（Shf）的Rf线圈系统
公开(公告)号：US20080129292A1
公开(公告)日：2008-06-05
申请号：US10595862
申请日：2004-11-03
申请人： Christoph G. Leussler , Christian Findeklee , Michael A. Morich , Zhiyong Zhai , Gordon D. DeMeester
发明人： Christoph G. Leussler , Christian Findeklee , Michael A. Morich , Zhiyong Zhai , Gordon D. DeMeester
IPC分类号： G01R33/422 , G01R33/34
CPC分类号： G01R33/3415 , G01R33/34046 , G01R33/34076 , G01R33/345 , G01R33/3453 , G01R33/3635 , G01R33/3642 , G01R33/365 , G01R33/3678 , G01R33/422 , G01R33/5659
摘要： A radio frequency coil system (38) for magnetic resonance imaging includes a plurality of parallel spaced apart rungs (60) which each includes rung capacitors (68). An end cap (64) is disposed at a closed end (66) of the coil system (38). An RF shield (62) is connected to the end cap (64) and surrounds the rungs (60), extending in a direction substantially parallel to rungs (60). The RF coil system (38) may be used as birdcage, TEM, hybrid, combination birdcage and TEM, or other.
摘要翻译：一种用于磁共振成像的射频线圈系统（38）包括多个平行隔开的梯级（60），每个梯级包括梯级电容器（68）。端盖（64）设置在线圈系统（38）的封闭端（66）处。 RF屏蔽（62）连接到端盖（64）并且围绕梯级（60）沿着基本平行于梯级（60）的方向延伸。 RF线圈系统（38）可以用作鸟笼，TEM，混合，组合鸟笼和TEM等。

2. 发明授权

US07495443B2 RF coil system for super high field (SHF) MRI 有权
标题翻译：射频线圈系统用于超高场（SHF）MRI
公开(公告)号：US07495443B2
公开(公告)日：2009-02-24
申请号：US10595862
申请日：2004-11-03
申请人： Christoph G. Leussler , Christian Findeklee , Michael A. Morich , Zhiyong Zhai , Gordon D. DeMeester
发明人： Christoph G. Leussler , Christian Findeklee , Michael A. Morich , Zhiyong Zhai , Gordon D. DeMeester
IPC分类号： G01V3/00
CPC分类号： G01R33/3415 , G01R33/34046 , G01R33/34076 , G01R33/345 , G01R33/3453 , G01R33/3635 , G01R33/3642 , G01R33/365 , G01R33/3678 , G01R33/422 , G01R33/5659
摘要： A radio frequency coil system (38) for magnetic resonance imaging includes a plurality of parallel spaced apart rungs (60) which each includes rung capacitors (68). An end cap (64) is disposed at a closed end (66) of the coil system (38). An RF shield (62) is connected to the end cap (64) and surrounds the rungs (60), extending in a direction substantially parallel to rungs (60). The RF coil system (38) may be used as birdcage, TEM, hybrid, combination birdcage and TEM, or other.
摘要翻译：一种用于磁共振成像的射频线圈系统（38）包括多个平行隔开的梯级（60），每个梯级包括梯级电容器（68）。端盖（64）设置在线圈系统（38）的封闭端（66）处。 RF屏蔽（62）连接到端盖（64）并且围绕梯级（60）沿着基本平行于梯级（60）的方向延伸。 RF线圈系统（38）可以用作鸟笼，TEM，混合，组合鸟笼和TEM等。

3. 发明申请

US20120019250A1 NOISE MATCHING IN COUPLET ANTENNA ARRAYS 有权
标题翻译：耦合天线阵列噪声匹配
公开(公告)号：US20120019250A1
公开(公告)日：2012-01-26
申请号：US13258612
申请日：2010-03-26
申请人： Christian Findeklee
发明人： Christian Findeklee
IPC分类号： G01R33/36 , H01Q1/50 , G01R33/34
CPC分类号： G01R33/3415 , G01R33/3628 , G01R33/3642
摘要： The invention relates to a system comprising an array of two or more receiving antennas (11, 12, 13) for receiving RF signals, each receiving antenna being connected, via a matching network (19, 20, 21), to a low-noise amplifier (22, 23, 24) presenting an input impedance to the matching network (19, 20, 21), each chain consisting of a receiving antenna (11, 12, 13), a matching network (19, 20, 21) and a low-noise amplifier (22, 23, 24) constituting a part of a receiving channel of the system, the matching networks (19, 20, 21) transforming optimum impedances of the low-noise amplifiers (22, 23, 24), the optimum impedances providing optimum noise performance of the low-noise amplifiers (22, 23, 24), wherein each receiving channel comprises at least one switchable impedance (28, 29, 30) at the input of each low-noise amplifier (22, 23, 24) for switching the input impedance as presented to each matching network (19, 20, 21) to a value being the complex conjugate of the optimum impedance of the respective low-noise amplifier (22, 23, 24). The system is arranged to perform an optimization procedure comprising the following steps: a) switching the input impedance presented to the matching network (19, 20, 21) in each receiving channel to the complex conjugate of the optimum impedance of the respective low-noise amplifier (22, 23, 24); b) receiving RF signals via the receiving antennas (11, 12, 13); c) forming a weighted sum of the signal power of the received RF signals; d) modifying the matching networks (19, 20, 21) of all receiving channels so as to find an optimum matching condition by maximizing the weighted power sum; c) switching the input impedance in each receiving channel back to a value for regular operation of the system.
摘要翻译：本发明涉及一种系统，其包括用于接收RF信号的两个或更多个接收天线（11,12,13）的阵列，每个接收天线经由匹配网络（19,20,21）被连接到低噪声放大器（22,23,24）向匹配网络（19,20,21）呈现输入阻抗，每条链由接收天线（11,12,13），匹配网络（19,20,21）和构成系统的接收信道的一部分的低噪声放大器（22,23,24），匹配网络（19,20,21）对低噪声放大器（22,23,24）的最佳阻抗进行变换，所述最佳阻抗提供所述低噪声放大器（22,23,24）的最佳噪声性能，其中每个接收通道包括在每个低噪声放大器（22,23,24）的输入处的至少一个可切换阻抗（28,29,30） 23,24），用于将呈现的输入阻抗切换到每个匹配网络（19,20,21），其值为最佳阻抗o的复共轭 f各个低噪声放大器（22,23,24）。该系统被布置为执行优化过程，该过程包括以下步骤：a）将呈现给每个接收信道中的匹配网络（19,20,21）的输入阻抗切换到相应低噪声的最佳阻抗的复共轭放大器（22,23,24）; b）经由所述接收天线（11,12,13）接收RF信号; c）形成所接收的RF信号的信号功率的加权和; d）修改所有接收信道的匹配网络（19,20,21），以便通过最大化加权功率和来找到最佳匹配条件; c）将每个接收通道中的输入阻抗切换回系统的常规操作的值。

4. 发明授权

US07973531B2 Detuning a radio-frequency coil 有权
标题翻译：解除射频线圈
公开(公告)号：US07973531B2
公开(公告)日：2011-07-05
申请号：US12302354
申请日：2007-05-29
申请人： Christian Findeklee , Daniel Wirtz
发明人： Christian Findeklee , Daniel Wirtz
IPC分类号： G01V3/00
CPC分类号： G01R33/34046 , G01R33/34007 , G01R33/345 , G01R33/3453 , G01R33/3635 , G01R33/3657
摘要： For detuning of radio-frequency coils (in magnetic resonance imaging and spectroscopy, for example), a conducting element (102) of a transmission cable is configured to form a primary resonant circuit tunable to at least one first resonance frequency. A second conducting element (104) of the transmission cable is configured to form a switching circuit that is electrically insulated from and reactively coupled via inductive coupling and/or capacitive coupling to the primary resonant circuit, and is adapted to tune the primary resonant circuit to at least one second resonance frequency, thereby detuning the primary resonant circuit.
摘要翻译：对于射频线圈的失谐（例如在磁共振成像和光谱学中），传输电缆的导电元件（102）被配置为形成可调谐至少一个第一共振频率的主谐振电路。传输电缆的第二导电元件（104）被配置为形成开关电路，该开关电路通过电感耦合和/或电容耦合与主谐振电路电绝缘并且通过其反应耦合，并且适于将主谐振电路调谐到至少一个第二谐振频率，从而使主谐振电路失谐。

5. 发明授权

US07602187B2 Integrated power supply for surface coils 失效
标题翻译：表面线圈集成电源
公开(公告)号：US07602187B2
公开(公告)日：2009-10-13
申请号：US11570893
申请日：2005-06-07
申请人： Kai-Michael Luedeke , Christian Findeklee , Peter H. Notten , Marinus J. A. M. van Helvoort , Hans H. Tuithof
发明人： Kai-Michael Luedeke , Christian Findeklee , Peter H. Notten , Marinus J. A. M. van Helvoort , Hans H. Tuithof
IPC分类号： G01V3/00
CPC分类号： H01M10/46 , G01R33/34 , G01R33/34007 , G01R33/34076 , G01R33/341 , G01R33/3415 , G01R33/422 , H01M2/1094 , H01M8/00 , H01M10/052 , H01M10/0525 , H01M10/0565 , H01M10/345 , H01M10/425 , H01M10/482 , H01Q7/00
摘要： A radio frequency receive coil for receiving a magnetic resonance signal includes a radio frequency antenna. The radio frequency antenna includes one or more electrical conductors (72, 74, 76, 78, 172, 173, 176, 180, 252, 254), at least one of which is a substantially hollow conductor (72, 78, 172, 252, 254). At least one electrical component (100, 110, 110′, 110″, 140, 160, 200) is mounted to be shielded from interfering with the MR signal by disposing it inside the substantially hollow conductor. The at least one electrical component can be, for example, a battery (100, 160, 200), a storage capacitor (140), or coil electronics (110, 110′,110″).
摘要翻译：用于接收磁共振信号的射频接收线圈包括射频天线。射频天线包括一个或多个电导体（72,74,76,78,172,173,176,180,252,254），其中至少一个是基本中空的导体（72,78,172,252 ，254）。安装至少一个电气部件（100,110,110'，110“，140,160,200）以通过将其布置在基本中空的导体内而被屏蔽以防止MR信号的干扰。至少一个电气部件可以是例如电池（100,160,200），存储电容器（140）或线圈电子器件（110,110'，110“）。

6. 发明授权

US06870453B2 MR apparatus provided with an open magnet system and a quadrature coil system 失效
标题翻译： MR设备具有开放磁体系统和正交线圈系统
公开(公告)号：US06870453B2
公开(公告)日：2005-03-22
申请号：US10135820
申请日：2002-04-30
申请人： Volkmar Schulz , Christian Findeklee , Christoph Guenther Leussler
发明人： Volkmar Schulz , Christian Findeklee , Christoph Guenther Leussler
IPC分类号： A61B5/055 , G01R33/34 , G01R33/422 , H01F1/00
CPC分类号： G01R33/34046 , G01R33/34061
摘要： The invention relates to an MR apparatus that is provided with an open magnet system and a quadrature coil system that includes a resonator that is tuned by tuning capacitors on at least one of the two sides of the steady magnetic field, said resonator including two large-area electrical conductors that are situated at a distance from one another and are connected to one another in a number of connection points that are distributed along the circumference, and are also provided with at least two terminals that are distributed along the circumference in order to receive or generate RF magnetic fields that are mutually offset in phase. The invention also relates to a corresponding quadrature coil system.
摘要翻译：本发明涉及一种具有开放磁体系统和正交线圈系统的MR装置，该系统包括通过在稳定磁场的两侧中的至少一个上的调谐电容器进行调谐的谐振器，所述谐振器包括两个大电流，区域电导体彼此间隔一定距离并且沿着圆周分布的多个连接点彼此连接，并且还设置有至少两个沿着圆周分布的端子，以便接收或产生相位相互偏移的RF磁场。本发明还涉及相应的正交线圈系统。

7. 发明申请

US20140139218A1 MAGNETIC RESONANCE IMAGING SYSTEM WITH A MULTI-CHANNEL IMPEDANCE MATCHING NETWORK 有权
标题翻译：具有多通道阻抗匹配网络的磁共振成像系统
公开(公告)号：US20140139218A1
公开(公告)日：2014-05-22
申请号：US14130379
申请日：2012-06-21
申请人： Christian Findeklee , Peter Vernickel
发明人： Christian Findeklee , Peter Vernickel
IPC分类号： G01R33/36
CPC分类号： G01R33/3628 , G01R33/3415 , G01R33/3635 , G01R33/365 , G01R33/5659
摘要： The Magnetic Resonance Imaging (MRI) system includes a radio-frequency transmitter with multiple transmit channels. The MRI system includes an impedance matching network (320, 1402, 1502, 1602) for matching the radio-frequency transmitter to a remotely adjustable radio-frequency antenna (310, 1504, 1602) with multiple antenna elements (312, 314, 316, 318, 1404). The MRI system includes a processor (336) for controlling the MRI system. The execution of the instructions by the processor causes it to: measure (100, 200) a set of radio-frequency properties (352) of the radio-frequency antenna, calculate (102, 202) a matching network command (354) using the set of radio-frequency properties and a radio frequency model (366), and adjust (104, 204) the impedance matching network by sending the matching network command to the impedance matching network, thereby enabling automatic remote impedance matching.
摘要翻译：磁共振成像（MRI）系统包括具有多个发射通道的射频发射机。 MRI系统包括用于将射频发射机与具有多个天线元件（312,314,316和1602）的远程可调射频天线（310,1504,1602）匹配的阻抗匹配网络（320,1402,1502,1602） 318，1404）。 MRI系统包括用于控制MRI系统的处理器（336）。由处理器执行指令使其：测量（100,200）一组射频天线的射频特性（352），使用该方法计算（102,202）匹配的网络命令（354）射频特性组和射频模型（366），并通过将匹配网络命令发送到阻抗匹配网络来调整（104,204）阻抗匹配网络，从而实现自动远程阻抗匹配。

8. 发明申请

US20120306493A1 ELECTRIC PROPERTIES TOMOGRAPHY IMAGING METHOD AND SYSTEM 有权
标题翻译：电性质地图成像方法与系统
公开(公告)号：US20120306493A1
公开(公告)日：2012-12-06
申请号：US13522367
申请日：2011-01-13
申请人： Tobias Ratko Voigt , Ulrich Katscher , Thomas Hendrik Rozijn , Paul Royston Harvey , Hanno Homann , Christian Findeklee , Eberhard Sebastian Hansis
发明人： Tobias Ratko Voigt , Ulrich Katscher , Thomas Hendrik Rozijn , Paul Royston Harvey , Hanno Homann , Christian Findeklee , Eberhard Sebastian Hansis
IPC分类号： G01R33/54 , G01R33/341
CPC分类号： G01R33/48 , A61B5/0536 , A61B5/055 , G01R33/246 , G01R33/443
摘要： The invention relates to a magnetic resonance method of electric properties tomography imaging of an object, the method comprising: applying an excitation RF field to the object via a coil at a first spatial coil position (402), acquiring resulting magnetic resonance signals via a receiving channel from the object, determining from the acquired magnetic resonance signals a first phase distribution and a first amplitude of a given magnetic field component of the excitation RF field of the coil at the first coil position (402), repeating these steps with a coil at a second different spatial coil position (404), to obtain a second phase distribution, determining a phase difference between the first and second phase distribution, determining a first and a second complex permittivity of the object, the first complex permittivity comprising the first amplitude of the given magnetic field component and the second complex permittivity comprising the second amplitude of the given magnetic field component and the phase difference, equating the first complex permittivity and the second complex permittivity for receiving a final equation and determining from the final equation a phase of the given magnetic field component for the first coil position (402).
摘要翻译：本发明涉及一种物体的电性能断层摄影成像的磁共振方法，该方法包括：经由第一空间线圈位置（402）的线圈将激发RF场施加到物体，经由接收器获得产生的磁共振信号从所述对象中确定所述线圈在所述第一线圈位置（402）处的所述磁共振信号的第一相位分布和所述线圈的激励RF场的给定磁场分量的第一幅度，并将线圈重复这些步骤第二不同的空间线圈位置（404），以获得第二相位分布，确定所述第一和第二相位分布之间的相位差，确定所述对象的第一和第二复介电常数，所述第一复介电常数包括所述第一和第二相位分布的第一幅度给定的磁场分量和包括给定磁场的第二振幅的第二复数介电常数分量和相位差，将第一复数介电常数和第二复数介电常数相等以接收最终方程，并从最终方程确定用于第一线圈位置（402）的给定磁场分量的相位。

9. 发明授权

US07239139B2 RF coil system for a magnetic resonance imaging apparatus 失效
标题翻译：用于磁共振成像装置的RF线圈系统
公开(公告)号：US07239139B2
公开(公告)日：2007-07-03
申请号：US10536286
申请日：2003-11-26
申请人： Christian Findeklee
发明人： Christian Findeklee
IPC分类号： G01V3/00
CPC分类号： G01R33/341 , G01R33/34046 , G01R33/3628
摘要： A device for the transmission and/or reception of RF signals for magnetic resonance imaging (RF coil system) is constructed as an RF coil (body coil) which is permanently mounted in a magnetic resonance imaging apparatus or as a so-called dedicated RF coil (that is, as a separate RF coil which is to be arranged on or around a region to be examined, for example, a head coil, a shoulder coil, a flexible surface coil etc.). A magnetic resonance imaging apparatus includes an RF coil system of this kind. The RF coil system includes a plurality of resonant conductor elements (201, 202, . . . , 208; 211, 212, . . . , 218), notably □/4 monopole elements. In comparison with known RF coil systems of the same length, a substantially larger field of view as well as a constant variation and a steeper drop of the field characteristic are thus achieved at the edges of the RF coil system while the construction remains comparatively simple and economical nevertheless.
摘要翻译：用于磁共振成像（RF线圈系统）的RF信号的发送和/或接收的装置被构造为RF线圈（体线圈），其被永久地安装在磁共振成像装置中或者作为所谓的专用RF线圈（即，作为要被布置在待检查区域上或周围的单独的RF线圈，例如，头部线圈，肩部线圈，柔性表面线圈等）。磁共振成像装置包括这种RF线圈系统。 RF线圈系统包括多个谐振导体元件（201,202 ...，208; 211,212 ... ... 218），特别是□/ 4单极元件。与已知的相同长度的RF线圈系统相比，在RF线圈系统的边缘处实现了大幅度的视野以及场特性的恒定变化和更陡的下降，同时结构保持相当简单，但经济。

10. 发明申请

US20060038564A1 Rf coil system for a magnetic resonance imaging apparatus 失效
标题翻译：用于磁共振成像装置的Rf线圈系统
公开(公告)号：US20060038564A1
公开(公告)日：2006-02-23
申请号：US10536286
申请日：2003-11-26
申请人： Christian Findeklee
发明人： Christian Findeklee
IPC分类号： G01V3/00
CPC分类号： G01R33/341 , G01R33/34046 , G01R33/3628
摘要： The invention relates to a device for the transmission and/or reception of RF signals for magnetic resonance imaging (RF coil system) which is constructed as an RF coil (body coil) which is permanently mounted in a magnetic resonance imaging apparatus or as a so-called dedicated RF coil (that is, as a separate RF coil which is to be arranged on or around a region to be examined, for example, a head coil, a shoulder coil, a flexible surface coil etc.), as well as to a magnetic resonance imaging apparatus which comprises an RF coil system of this kind. The RF coil system is characterized in that it consists of a plurality of resonant conductor elements (201, 202, . . . , 208; 211, 212, . . . , 218), notably ¼ monopole elements. In comparison with known RF coil systems of the same length, a substantially larger field of view as well as a constant variation and a steeper drop of the field characteristic are thus achieved at the edges of the RF coil system while the construction remains comparatively simple and economical nevertheless.
摘要翻译：本发明涉及用于磁共振成像（RF线圈系统）的RF信号的发送和/或接收的装置，其被构造为永久地安装在磁共振成像装置中的RF线圈（体线圈）专用RF线圈（即，作为要被布置在待检查区域上或周围的单独的RF线圈，例如，头线圈，肩线圈，柔性表面线圈等）以及涉及一种包括这种RF线圈系统的磁共振成像设备。 RF线圈系统的特征在于它由多个谐振导体元件（201,202 ... ... 208,211,212 ... ... 218）组成，特别是1/4单极元件。与已知的相同长度的RF线圈系统相比，在RF线圈系统的边缘处实现了大幅度的视场以及场特性的恒定变化和更陡的下降，同时结构保持相当简单，但经济。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式