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1. 发明申请

WO2010023586A3 RF ANTENNA ARRANGEMENTS FOR A MIT APPARATUS 审中-公开
标题翻译：射频天线安装麻省理工学院设备
公开(公告)号：WO2010023586A3
公开(公告)日：2010-06-10
申请号：PCT/IB2009053589
申请日：2009-08-14
申请人： KONINKL PHILIPS ELECTRONICS NV , VERNICKEL PETER , MAZURKEWITZ PETER , LEUSSLER CHRISTOPH , FINDEKLEE CHRISTIAN , WIRTZ DANIEL , KATSCHER ULRICH , PHILIPS INTELLECTUAL PROPERTY
发明人： VERNICKEL PETER , MAZURKEWITZ PETER , LEUSSLER CHRISTOPH , FINDEKLEE CHRISTIAN , WIRTZ DANIEL , KATSCHER ULRICH
IPC分类号： H01Q19/10 , A61B5/05 , H01Q21/28
CPC分类号： H01Q21/28 , A61B5/0522 , A61B5/0536 , H01Q19/104
摘要： Several RF antenna arrangements are disclosed, particularly for use as RF transmitter and/or receiver antenna arrangements in a MIT apparatus, with which an increased signal-to-noise ratio, an improved MIT imaging performance, an increased spatial and temporal resolution of the generated images, a reduced acquisition time and greater measurement reliability can be obtained.
摘要翻译：公开了几种RF天线装置，特别是用作MIT装置中的RF发射器和/或接收器天线装置，利用该RF天线装置增加了信噪比，提高了MIT成像性能，增加了所生成的空间和时间分辨率图像，可以获得缩短的采集时间和更高的测量可靠性。

2. 发明申请

WO2010018504A3 METHOD AND MONITORING DEVICE FOR PERFORMING AN RF-SAFE MIT SCAN 审中-公开
标题翻译：用于执行RF-SAFE MIT扫描的方法和监视设备
公开(公告)号：WO2010018504A3
公开(公告)日：2010-06-10
申请号：PCT/IB2009053453
申请日：2009-08-07
申请人： KONINKL PHILIPS ELECTRONICS NV , VERNICKEL PETER , MAZURKEWITZ PETER , WIRTZ DANIEL , LEUSSLER CHRISTOPH , KATSCHER ULRICH , PHILIPS INTELLECTUAL PROPERTY
发明人： VERNICKEL PETER , MAZURKEWITZ PETER , WIRTZ DANIEL , LEUSSLER CHRISTOPH , KATSCHER ULRICH
IPC分类号： A61B5/05 , G01V3/10
CPC分类号： A61B5/0536 , A61B5/0522
摘要： A method and a monitoring device for performing an RF-safe MIT scan is disclosed in which it is prevented that an RF exposure, especially a specific absorption rate (SAR), imposed on an examination object, especially a patient, exceeds certain limit values during a magnetic induction tomography (MIT) scan. This is achieved on the one hand by an RF simulation method for simulating intended MIT operating parameters and calculating a resulting RF exposure of the object, and on the other hand by a monitoring device for monitoring the RF power which is applied to the object.
摘要翻译：公开了一种用于执行RF安全MIT扫描的方法和监视设备，其中防止施加在检查对象，特别是患者上的RF暴露量，特别是特定吸收率（SAR）在期间超过特定极限值磁感应断层扫描（MIT）扫描。这一方面通过用于模拟预期MIT操作参数并计算物体的最终RF暴露的RF模拟方法来实现，另一方面通过用于监测施加到物体的RF功率的监测装置来实现。

3. 发明申请

WO2006067727A3 MAGNETIC RESONANCE IMAGING SYSTEM AND METHOD 审中-公开
标题翻译：磁共振成像系统和方法
公开(公告)号：WO2006067727A3
公开(公告)日：2006-10-05
申请号：PCT/IB2005054312
申请日：2005-12-19
申请人： KONINKL PHILIPS ELECTRONICS NV , PHILIPS INTELLECTUAL PROPERTY , KATSCHER ULRICH , FINDEKLEE CHRISTIAN , VERNICKEL PETER , LEUSSLER CHRISTOPH
发明人： KATSCHER ULRICH , FINDEKLEE CHRISTIAN , VERNICKEL PETER , LEUSSLER CHRISTOPH
IPC分类号： G01R33/36
CPC分类号： G01R33/3607 , G01R33/5611
摘要： The present invention relates to a magnetic resonance imaging system (1) comprising a plurality of RF coils (4) forming a multi-coil array and furthermore to a magnetic resonance imaging method for such a system. In order to provide an MR imaging system and method in which a desired excitation pattern is achieved in a simple way, it is suggested to utilize an analytical procedure how to combine the single coil elements to obtain the most homogeneous Bl excitation possible with a given coil array. In other words, the homogeneity of the Bl field is improved in a very simple way. The sensitivity of each RF coil (4) of the coil array is scaled or weighted by a complex factor, i.e. phase and amplitude of each coil drive signal is adjusted accordingly. These complex factors are determined analytically utilizing the sensitivities S (8) of the coil elements (4) and the desired excitation pattern P (IO, 11). The invention allows an optimized control of the field distribution (RF shimming) for arbitrary RF coil arrays. With the invention a fast and easy independent phase and amplitude control of the coil elements (4) is provided for reducing body- induced RF non- uniformities, which appear in high field MR systems.
摘要翻译：本发明涉及一种磁共振成像系统（1），其包括形成多线圈阵列的多个RF线圈（4），并且还涉及用于这种系统的磁共振成像方法。为了提供其中以简单的方式实现期望的激励模式的MR成像系统和方法，建议利用分析过程如何组合单个线圈元件以获得可能具有给定线圈的最均匀的B1激励阵列。换句话说，B1场的同质性以非常简单的方式得到改善。线圈阵列的每个RF线圈（4）的灵敏度由一个复数因子缩放或加权，即相应地调整每个线圈驱动信号的相位和幅度。利用线圈元件（4）的灵敏度S（8）和期望的激励模式P（IO，11）来分析确定这些复杂因素。本发明允许对任意RF线圈阵列的场分布（RF匀场）进行优化控制。通过本发明，线圈元件（4）的快速且容易的独立相位和振幅控制被提供用于减少出现在高场MR系统中的身体诱发的RF不均匀性。

4. 发明申请

WO2007017779A3 ELECTRIC IMPEDANCE IMAGING SYSTEM 审中-公开
标题翻译：电阻成像系统
公开(公告)号：WO2007017779A3
公开(公告)日：2007-10-11
申请号：PCT/IB2006052501
申请日：2006-07-21
申请人： KONINKL PHILIPS ELECTRONICS NV , PHILIPS INTELLECTUAL PROPERTY , KATSCHER ULRICH , FINDEKLEE CHRISTIAN , VERNICKEL PETER
发明人： KATSCHER ULRICH , FINDEKLEE CHRISTIAN , VERNICKEL PETER
IPC分类号： A61B5/053
CPC分类号： A61B5/0536 , A61B5/055 , A61B5/7239
摘要： An electric impedance imaging system is presented in which the electrical permittivity and/or conductivity distribution is derived on the basis of magnetic resonance signals. The magnetic resonance signals are generated due to an excitation electro-magnetic field. Notably, a magnetic induction field strength is derived from the acquired magnetic resonance signals. Also the electrical field strength associated with the excitation electro-magnetic field is computed. The electrical permittivity and/or conductivity distribution is computed on the basis of the electric field strength and the magnetic induction field strength.
摘要翻译：提出了一种电阻抗成像系统，其中基于磁共振信号导出介电常数和/或电导率分布。由于激励电磁场而产生磁共振信号。值得注意的是，从获取的磁共振信号导出磁感应场强。此外，计算与激励电磁场相关联的电场强度。基于电场强度和磁感应场强计算电介电常数和/或电导率分布。

5. 发明申请

WO2011039692A3 MR IMAGING USING MULTI-CHANNEL RF EXCITATION 审中-公开
标题翻译：使用多通道射频激励成像
公开(公告)号：WO2011039692A3
公开(公告)日：2011-11-10
申请号：PCT/IB2010054339
申请日：2010-09-27
申请人： KONINKL PHILIPS ELECTRONICS NV , PHILIPS INTELLECTUAL PROPERTY , FUDERER MIHA , ROZIJN THOMAS HENDRIK , KATSCHER ULRICH , NEHRKE KAY , HARVEY PAUL ROYSTON
发明人： FUDERER MIHA , ROZIJN THOMAS HENDRIK , KATSCHER ULRICH , NEHRKE KAY , HARVEY PAUL ROYSTON
IPC分类号： G01R33/561
CPC分类号： G01R33/5612 , G01R33/246 , G01R33/5659
摘要： The invention relates to a magnetic resonance imaging apparatus comprising an array of two or more RF antennas(9) for transmitting RF pulses to and receiving MR signals from a body(7) of a patient positioned in an examination volume (2), the RF antennas (9) having spatial transmit and receive sensitivity profiles. The apparatus is arranged to: -control the temporal succession, the phase, and the amplitude of the RF feeding of each individual RF antenna (9), the phases and amplitudes being determined from the spatial transmit sensitivity profiles of the RF antennas(9), and -reconstruct a MR image from a combination of the received MR signals received via the individual RF antennas(9) and from the spatial receive sensitivity profiles of the RF antennas(9). The invention proposes that the apparatus is further arranged to: -determine the spatial transmit sensitivity profiles of the RF antennas (9) from the spatial receive sensitivity profiles of the RF antennas (9), or -determine the spatial receive sensitivity profiles of the RF antennas (9) from the spatial transmit sensitivity profiles of the RF antennas (9).
摘要翻译：本发明涉及一种磁共振成像设备，其包括用于向位于检查体积（2）中的患者的身体（7）发送RF脉冲并从其接收MR信号的两个或更多个RF天线（9）的阵列，RF 天线（9）具有空间发射和接收灵敏度分布。该装置被设置为： - 控制每个单独RF天线（9）的RF馈送的时间序列，相位和幅度，根据RF天线（9）的空间发射灵敏度分布确定相位和幅度，，并且从经由各个RF天线（9）接收的接收的MR信号和RF天线（9）的空间接收灵敏度分布的组合重构MR图像。本发明提出，该装置进一步被布置成： - 根据RF天线（9）的空间接收灵敏度分布来确定RF天线（9）的空间发射灵敏度分布，或者确定RF的空间接收灵敏度分布天线（9）从RF天线（9）的空间发射灵敏度分布图。

6. 发明申请

WO2009118702A2 FLIP ANGLE IMAGING WITH IMPROVED B1 MAPPING FOR MULTI-RF TRANSMIT SYSTEMS 审中-公开
标题翻译：具有改进的用于多射频发射系统的B1映射的翻转角成像
公开(公告)号：WO2009118702A2
公开(公告)日：2009-10-01
申请号：PCT/IB2009051258
申请日：2009-03-26
申请人： KONINKL PHILIPS ELECTRONICS NV , PHILIPS INTELLECTUAL PROPERTY , NEHRKE KAY , BOERNERT PETER , VOIGT TOBIAS RATKO , KATSCHER ULRICH
发明人： NEHRKE KAY , BOERNERT PETER , VOIGT TOBIAS RATKO , KATSCHER ULRICH
IPC分类号： G01R33/3415 , G01R33/565
CPC分类号： G01R33/586 , G01R33/246 , G01R33/3415 , G01R33/5612 , G01R33/56518 , G01R33/5659
摘要： A magnetic resonance method includes performing a plurality of magnetic resonance excitation operations each using a different sub-set of a set of radio frequency transmit coils (30), each sub-set including more than one radio frequency transmit coil, acquiring magnetic resonance data responsive to each said magnetic resonance excitation operation, and computing a B1 or flip angle map for each radio frequency transmit coil of the set of radio frequency transmit coils based on the acquired magnetic resonance data. A magnetic resonance method includes performing an actual flip angle mapping (AFI) sequence using a radio frequency transmit coil (32) with a ratio TR1 : TR2 of the TR times of the AFI sequence selected to be rational, acquiring magnetic resonance data responsive to said AFI sequence, and computing a B1 or flip angle map for the radio frequency transmit coil based on the acquired magnetic resonance data.
摘要翻译：磁共振方法包括使用一组射频发射线圈（30）的不同子集执行多个磁共振激励操作，每个子集包括多于一个射频发射线圈，响应于磁共振数据到每个所述磁共振激励操作，以及基于所获取的磁共振数据计算所述射频发射线圈组中的每个射频发射线圈的B1或翻角图。磁共振方法包括使用射频发射线圈（32）执行实际的翻转角映射（AFI）序列，其中AFI序列的TR次的比值TR1：TR2被选择为合理，获取响应于所述的 AFI序列，并且基于获取的磁共振数据计算用于射频发射线圈的B1或翻转角图。

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