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1. 发明公开

CN102549446A 具有可自由访问的检查体积的MR成像系统无效
公开(公告)号：CN102549446A
公开(公告)日：2012-07-04
申请号：CN201080043029.8
申请日：2010-09-14
申请人：皇家飞利浦电子股份有限公司
发明人： C·洛斯勒 , D·维尔茨
IPC分类号： G01R33/343 , G01R33/345
CPC分类号： G01R33/345 , G01R33/341 , G01R33/343 , G01R33/4802
摘要：本发明涉及一种磁共振成像系统(1)，包括：主磁体，其用于在检查体积(21)之内生成均匀稳定的磁场；RF波导(19)，其用于在所述RF波导(19)的至少一种行进模式中沿着所述检查体积(21)的轴引导RF行波；至少一个RF天线(9)，其用于定向位于所述检查体积(21)中的患者的身体(10)发射RF脉冲和/或从所述身体(10)接收MR信号，其中，所述RF天线(9)被配置成与所述RF波导(19)的至少一种行进模式耦合，并且其中，所述RF天线(9)位于所述成像系统上，使得所述检查体积(21)能够被自由访问；控制单元(15)，其用于控制RF脉冲的时间相继性，以及重建单元(17)，其用于从所接收的MR信号重建MR图像。此外，本发明涉及一种用于MR成像系统(1)的RF天线(9)，其中，RF天线(9)由包括至少一个凹陷(23)的导电板(22)形成。

2. 发明申请

US20130200897A1 METAMATERIAL LINERS FOR HIGH-FIELD-STRENGTH TRAVELING-WAVE MAGNETIC RESONANCE IMAGING 有权
标题翻译：高强度行走波磁共振成像用金属线
公开(公告)号：US20130200897A1
公开(公告)日：2013-08-08
申请号：US13757459
申请日：2013-02-01
申请人： TEC Edmonton , Alberta Health Services
发明人： Iyer Ashwin , Justin Pollock , Nicola de Zanche
IPC分类号： G01R33/28 , H01P11/00
CPC分类号： G01R33/28 , G01R33/4802 , H01P11/00 , Y10T29/49016
摘要： A liner for a bore of a waveguide is provided. The liner as an aperture passing through it and is formed of a metamaterial that has a relative electrical permittivity that is negative and near zero. When the liner is installed in the waveguide, it lowers the cutoff frequency of the waveguide while allowing the waveguide to remain hollow. This liner can be used in the bore of an MRI machine to lower the cutoff frequency of the bore of the MRI machine to allow the MRI machine to operate using waves having a lower frequency that if the liner was not used.
摘要翻译：提供了一种用于波导孔的衬套。衬垫作为通过它的孔，并且由具有负和接近零的相对电容率的超材料形成。当衬套安装在波导管中时，它降低波导的截止频率，同时允许波导保持中空。该衬垫可用于MRI机器的孔中，以降低MRI机器的孔的截止频率，以允许MRI机器使用具有较低频率的波，如果不使用衬垫，则使用该波形。

3. 发明公开

EP2500739A1 Transmission line apparatus for travelling wave MRI 审中-公开
标题翻译： ÜbertragungsleitungsvorrichtungfürWanderwellen-MRI
公开(公告)号：EP2500739A1
公开(公告)日：2012-09-19
申请号：EP11158206.0
申请日：2011-03-15
申请人： Deutsches Krebsforschungszentrum , Karlsruher Institut für Technologie
发明人： Müller, Marco , Umathum, Reiner , Alt, Stefan , Bock, Michael , Werner, Wiesbeck
IPC分类号： G01R33/345 , G01R33/48
CPC分类号： G01R33/3453 , G01R33/3456 , G01R33/4802
摘要： A transmission line array (106, 106', 106") for magnetic resonance imaging of an object (100) to be imaged comprising a plurality of transmission line elements (118) is proposed, wherein the plurality of transmission line elements (118) are arranged in a generally cylindrical configuration having an arbitrarily chosen longitudinal (Z) length (108, 112, 124). Furthermore, a method for creating a radio-frequency excitation field for magnetic resonance imaging using a transmission line array (106, 106', 106") comprising transmission line elements (118) in a generally cylindrical configuration is proposed, wherein the method includes the steps:
a) positioning said transmission line array (106, 106', 106") having an arbitrarily chosen longitudinal (Z) length around an object (100) to be imaged or selectively around a section of said object (100) to be imaged,
b) coupling-in a radio-frequency signal to said transmission line array (106, 106', 106"),
c) transmitting and/or receiving travelling radio-frequency waves through said transmission line array (106, 106', 106").
摘要翻译：提出一种传输线阵列（106,106'，106“），用于对包含多个传输线元件（118）的成像对象（100）进行磁共振成像，其中多个传输线元件（118）是布置成具有任意选择的纵向（Z）长度（108,112,124）的大致圆柱形构造。此外，使用传输线阵列（106,106'，...）创建用于磁共振成像的射频激励场的方法，提出了包括大致圆柱形结构的传输线元件（118）的方法，其中该方法包括以下步骤：a）将具有任意选择的纵向（Z）长度的所述传输线阵列（106,106'，106“）定位围绕要成像的所述物体（100）的一部分成像或选择性地围绕物体（100），b）将射频信号耦合到所述传输线阵列（106,106'，106“），c ）发送和/或接收travellin g的射频波通过所述传输线阵列（106,106'，106“）。

4. 发明公开

EP2483702A2 MR IMAGING SYSTEM WITH FREELY ACCESSIBLE EXAMINATION VOLUME 审中-公开
标题翻译：与无障碍调查VOLUME MR成像系统
公开(公告)号：EP2483702A2
公开(公告)日：2012-08-08
申请号：EP10760084.3
申请日：2010-09-14
申请人： Koninklijke Philips Electronics N.V. , Philips Intellectual Property & Standards GmbH
发明人： LEUSSLER, Christoph , WIRTZ, Daniel
IPC分类号： G01R33/343
CPC分类号： G01R33/345 , G01R33/341 , G01R33/343 , G01R33/4802
摘要： The invention relates to a magnetic resonance imaging system (1) comprising: a main magnet for generating a uniform, steady magnetic field within an examination volume (21), an RF waveguide (19) for guiding travelling RF waves along an axis of the examination volume (21) in at least one travelling mode of the RF waveguide (19), at least one RF antenna (9) for transmitting RF pulses to and/or receiving MR signals from a body (10) of a patient positioned in the examination volume (21), wherein the RF antenna (9) is configured to couple to the at least one travelling mode of the RF waveguide (19), and wherein the RF antenna (9) is located on the imaging system such that the examination volume (21) is freely accessible, a control unit (15) for controlling the temporal succession of RF pulses, and a reconstruction unit (17) for reconstructing an MR image from the received MR signals. Further, the invention relates to an RF antenna (9) for an MR imaging system (1), wherein the RF antenna (9) is formed by an electrically conductive plate (22) comprising at least one recess (23).

5. 发明申请

WO2012152618A1 ANTENNA ASSEMBLY FOR ULTRA-HIGH FIELD MRI 审中-公开
标题翻译：用于超声场MRI的天线装置
公开(公告)号：WO2012152618A1
公开(公告)日：2012-11-15
申请号：PCT/EP2012/057990
申请日：2012-05-02
申请人： DEUTSCHES KREBSFORSCHUNGSZENTRUM , UMATHUM, Reiner
发明人： UMATHUM, Reiner
IPC分类号： G01R33/3415 , G01R33/561
CPC分类号： G01R33/3415 , G01R33/4802 , G01R33/5612
摘要： The invention relates to an antenna assembly (1) comprising at least one input port (10) and a plurality of antenna elements (20 - 24'). The plurality of antenna elements (20 - 24') is supplied by the at least one input port (10) via a circuitry (7). The antenna elements (20 - 24') are arranged along a circumference around an inner area (90) of the antenna assembly (1). At least two of the antenna elements (20 - 24') have distinct characteristic impedances. According to the invention, the impedance of an antenna element is varied with respect to that of another antenna element in order to achieve the desired spatial rf field distribution. The invention further relates to a radio transmitter (5) comprising at least one of the inventive antenna assemblies (1) as well as a RF source (11). In addition, the invention relates to a method for operating the inventive antenna assembly (1).
摘要翻译：本发明涉及一种包括至少一个输入端口（10）和多个天线元件（20-24'）的天线组件（1）。所述多个天线元件（20-24'）由所述至少一个输入端口（10）经由电路（7）提供。天线元件（20-24'）沿着围绕天线组件（1）的内部区域（90）的圆周布置。至少两个天线元件（20-24'）具有明显的特征阻抗。根据本发明，天线元件的阻抗相对于另一个天线元件的阻抗而变化，以便实现所需的空间射频场分布。本发明还涉及包括本发明的天线组件（1）中的至少一个以及RF源（11）的无线电发射机（5）。另外，本发明涉及一种用于操作本发明的天线组件（1）的方法。

6. 发明申请

WO2012030548A1 TRAVELING WAVE MRI IN HIGH BO FIELD STRENGTHS 审中-公开
标题翻译：高波场强度旅行波
公开(公告)号：WO2012030548A1
公开(公告)日：2012-03-08
申请号：PCT/US2011/048240
申请日：2011-08-18
申请人： PRESIDENT AND FELLOWS OF HARVARD COLLEGE , KIRULUTA, Andrew
发明人： KIRULUTA, Andrew
IPC分类号： G01R33/48
CPC分类号： G01R33/32 , G01R33/445 , G01R33/4802
摘要： In an MRI scanner, the transmission and reception of RF excitation and detected signal waves is accomplished using far field excitation instead of conventional near field excitation. By superimposing two counter-propagating waves from the same source in the MRI sample interference fringes are recorded in the sample in such a way that the relative phase between the two propagation wave vectors determines the periodicity of the maxima and minima in the interference fringe pattern. The complete fringe pattern, known as a spatial hologram, contains both the phase and amplitude information of the information-bearing wave. When exposed to a replica of the original reference wave, the fringe pattern acts as a diffraction grating, reproducing the information-bearing field propagating at the same relative phase.
摘要翻译：在MRI扫描仪中，RF激发和检测信号波的发射和接收使用远场激励而不是传统的近场激励来实现。通过在MRI样本中叠加来自相同源的两个反向传播波，将干涉条纹记录在样本中，使得两个传播波矢量之间的相对相位确定干涉条纹图案中的最大值和最小值的周期性。称为空间全息图的完整条纹图案包含信息承载波的相位和幅度信息。当暴露于原始参考波的复制品时，条纹图案用作衍射光栅，再现在相同相对相位传播的信息承载场。

7. 发明申请

WO2009127431A1 TRAVELLING-WAVE NUCLEAR MAGNETIC RESONANCE METHOD 审中-公开
标题翻译：行波磁核磁共振方法
公开(公告)号：WO2009127431A1
公开(公告)日：2009-10-22
申请号：PCT/EP2009/002846
申请日：2009-04-17
申请人： EIDGENÖSSISCHE TECHNISCHE HOCHSCHULE (ETH) , UNIVERSITÄT ZÜRICH , FRÖHLICH, Jürg , BRUNNER, David , PRÜSSMANN, Klaas , DE ZANCHE, Nicola
发明人： FRÖHLICH, Jürg , BRUNNER, David , PRÜSSMANN, Klaas , DE ZANCHE, Nicola
IPC分类号： G01R33/345
CPC分类号： G01R33/345 , G01R33/4802
摘要： A method for acquiring an image or spectrum of a subject or object residing within the magnetic field of a magnetic resonance apparatus, comprises the steps of: executing a predetermined pulse sequence for applying gradient magnetic fields and for coupling in electromagnetic excitation pulses to induce nuclear magnetic resonance within the subject or object; detecting an electromagnetic signal resulting from said magnetic resonance; and constructing at least one image or magnetic resonance spectrum of said subject or object from said detected electromagnetic signal. According to the invention, said coupling in of the electromagnetic excitation pulse and/or said detecting of the electromagnetic signal are carried out substantially by means of travelling electromagnetic waves.
摘要翻译：一种用于获取驻留在磁共振装置的磁场内的被摄体或物体的图像或光谱的方法，包括以下步骤：执行用于施加梯度磁场的预定脉冲序列，并用于在电磁激励脉冲中耦合以诱导核磁受试者或物体内的共振; 检测由所述磁共振产生的电磁信号; 以及从所述检测到的电磁信号构建所述被摄体或物体的至少一个图像或磁共振谱。根据本发明，电磁激励脉冲的所述耦合和/或所述电磁信号的检测基本上通过行进的电磁波来执行。

8. 发明授权

US08653821B2 HF attenuation 有权
标题翻译： HF衰减
公开(公告)号：US08653821B2
公开(公告)日：2014-02-18
申请号：US13172803
申请日：2011-06-29
申请人： Wolfgang Renz , Karsten Wicklow
发明人： Wolfgang Renz , Karsten Wicklow
IPC分类号： G01V3/00
CPC分类号： G01R33/422 , G01R33/4802
摘要： The present embodiments relate to a device and a method for attenuating a high-frequency field of a magnetic resonance tomography system, where at least one attenuation element attenuating high-frequency fields is provided outside a magnetic resonance tomography field of view.
摘要翻译：本实施例涉及用于衰减磁共振断层摄影系统的高频场的装置和方法，其中至少一个衰减高频场的衰减元件设置在磁共振断层摄影视野外。

9. 发明申请

US20130241549A1 TRAVELING WAVE MRI IN HIGH BO FIELD STRENGTHS 有权
标题翻译：高波场强度旅行波
公开(公告)号：US20130241549A1
公开(公告)日：2013-09-19
申请号：US13819275
申请日：2011-08-18
申请人： Andrew Kiruluta
发明人： Andrew Kiruluta
IPC分类号： G01R33/32 , G01R33/44
CPC分类号： G01R33/32 , G01R33/445 , G01R33/4802
摘要： In an MRI scanner, the transmission and reception of RF excitation and detected signal waves is accomplished using far field excitation instead of conventional near field excitation. By superimposing two counter-propagating waves from the same source in the MRI sample interference fringes are recorded in the sample in such a way that the relative phase between the two propagation wave vectors determines the periodicity of the maxima and minima in the interference fringe pattern. The complete fringe pattern, known as a spatial hologram, contains both the phase and amplitude information of the information-bearing wave. When exposed to a replica of the original reference wave, the fringe pattern acts as a diffraction grating, reproducing the information-bearing field propagating at the same relative phase.
摘要翻译：在MRI扫描仪中，RF激发和检测信号波的发射和接收使用远场激励而不是传统的近场激励来实现。通过在MRI样本中叠加来自相同源的两个反向传播波，将干涉条纹记录在样本中，使得两个传播波矢量之间的相对相位确定干涉条纹图案中的最大值和最小值的周期性。称为空间全息图的完整条纹图案包含信息承载波的相位和幅度信息。当暴露于原始参考波的复制品时，条纹图案用作衍射光栅，再现在相同相对相位传播的信息承载场。

10. 发明申请

US20130082710A1 SYSTEM FOR TRAVELLING WAVE MR IMAGING AT LOW FREQUENCIES AND METHOD OF MAKING SAME 有权
标题翻译：用于在低频下行波成像的系统及其制造方法
公开(公告)号：US20130082710A1
公开(公告)日：2013-04-04
申请号：US13250202
申请日：2011-09-30
申请人： James S. Tropp
发明人： James S. Tropp
IPC分类号： G01R33/345 , H01F41/02 , G01R33/28
CPC分类号： G01R33/4802 , G01R33/345
摘要： A system for travelling wave MR imaging includes an MR imaging apparatus having a magnet coil assembly having a magnet coil bore extending therethrough, a gradient coil assembly positioned within the magnet coil bore and having a gradient coil bore extending therethrough, and a waveguide positioned within the gradient coil bore. The waveguide has a waveguide bore extending therethrough. A computer is programmed to access a scan sequence comprising an RF pulse sequence and execute the scan sequence. During execution of the scan sequence, the computer is programmed to operate the waveguide in a hybrid mode to transmit an RF pulse of the RF pulse scan sequence as a travelling wave at a frequency lower than a cutoff frequency of a principal mode of the waveguide absent a dielectric core and to acquire MR signals from an imaging subject positioned within the waveguide bore.
摘要翻译：用于行波MR成像的系统包括具有磁铁线圈组件的MR成像装置，磁体线圈组件具有延伸穿过其中的磁体线圈孔，位于磁体线圈孔内的梯度线圈组件，并且具有延伸穿过其中的梯度线圈孔，梯度线圈孔。波导具有延伸穿过其中的波导孔。计算机被编程以访问包括RF脉冲序列的扫描序列并执行扫描序列。在执行扫描序列期间，计算机被编程为以混合模式操作波导，以将RF脉冲扫描序列的RF脉冲作为行波以低于波导的主模式的截止频率的频率传输介质芯并且从位于波导孔内的成像对象获取MR信号。

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