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

Applicant: KONINKL PHILIPS ELECTRONICS NV ,  VERNICKEL PETER ,  MAZURKEWITZ PETER ,  LEUSSLER CHRISTOPH ,  FINDEKLEE CHRISTIAN ,  WIRTZ DANIEL ,  KATSCHER ULRICH ,  PHILIPS INTELLECTUAL PROPERTY

Inventor： VERNICKEL PETER ,  MAZURKEWITZ PETER ,  LEUSSLER CHRISTOPH ,  FINDEKLEE CHRISTIAN ,  WIRTZ DANIEL ,  KATSCHER ULRICH

IPC: H01Q19/10 ,  A61B5/05 ,  H01Q21/28

CPC classification number: H01Q21/28 ,  A61B5/0522 ,  A61B5/0536 ,  H01Q19/104

Abstract: 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.

Abstract translation: 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。

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

Applicant: KONINKL PHILIPS ELECTRONICS NV ,  PHILIPS INTELLECTUAL PROPERTY ,  NEHRKE KAY ,  BOERNERT PETER ,  VOIGT TOBIAS RATKO ,  KATSCHER ULRICH

Inventor： NEHRKE KAY ,  BOERNERT PETER ,  VOIGT TOBIAS RATKO ,  KATSCHER ULRICH

IPC: G01R33/3415 ,  G01R33/565

CPC classification number: G01R33/586 ,  G01R33/246 ,  G01R33/3415 ,  G01R33/5612 ,  G01R33/56518 ,  G01R33/5659

Abstract: 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.

Abstract translation: 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。

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

Applicant: KONINKL PHILIPS ELECTRONICS NV ,  PHILIPS INTELLECTUAL PROPERTY ,  KATSCHER ULRICH ,  FINDEKLEE CHRISTIAN ,  VERNICKEL PETER ,  LEUSSLER CHRISTOPH

Inventor： KATSCHER ULRICH ,  FINDEKLEE CHRISTIAN ,  VERNICKEL PETER ,  LEUSSLER CHRISTOPH

IPC: G01R33/36

CPC classification number: G01R33/3607 ,  G01R33/5611

Abstract: 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.

Abstract translation: 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。