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

Applicant: KONINKL PHILIPS ELECTRONICS NV ,  PHILIPS INTELLECTUAL PROPERTY ,  FUDERER MIHA ,  ROZIJN THOMAS HENDRIK ,  KATSCHER ULRICH ,  NEHRKE KAY ,  HARVEY PAUL ROYSTON

Inventor： FUDERER MIHA ,  ROZIJN THOMAS HENDRIK ,  KATSCHER ULRICH ,  NEHRKE KAY ,  HARVEY PAUL ROYSTON

IPC: G01R33/561

CPC classification number: G01R33/5612 ,  G01R33/246 ,  G01R33/5659

Abstract: 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).

Abstract translation: 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。

公开(公告)号：WO2009112987A8

公开(公告)日：2010-09-23

申请号：PCT/IB2009050925

申请日：2009-03-06

Applicant: KONINKL PHILIPS ELECTRONICS NV ,  PHILIPS INTELLECTUAL PROPERTY ,  JURRISSEN MICHEL P J ,  BOERNERT PETER ,  DONEVA MARIYA I ,  FUDERER MIHA

Inventor： JURRISSEN MICHEL P J ,  BOERNERT PETER ,  DONEVA MARIYA I ,  FUDERER MIHA

IPC: G01R33/561 ,  G01R33/3415

CPC classification number: G01R33/022 ,  G01R33/3415 ,  G01R33/3664 ,  G01R33/543 ,  G01R33/5611 ,  G01R33/5659

Abstract: The invention relates to a method of selecting a set of coil elements from a multitude of physical coil elements comprised in a coil array for performing a magnetic resonance imaging scan of a region of interest.

Abstract translation: 本发明涉及从包括在线圈阵列中的多个物理线圈元件中选择一组线圈元件的方法，用于对感兴趣区域执行磁共振成像扫描。

公开(公告)号：WO2005111649A1

公开(公告)日：2005-11-24

申请号：PCT/IB2005/051559

申请日：2005-05-12

Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V. ,  HAM, Cornelis, L., G. ,  FUDERER, Miha ,  VAN DEN BRINK, Johan, S.

Inventor： HAM, Cornelis, L., G. ,  FUDERER, Miha ,  VAN DEN BRINK, Johan, S.

IPC: G01R33/563

CPC classification number: G01R33/56375

Abstract: The invention relates to a MRI system and to a method for producing an image with such an system. In order to provide a MR imaging technique with a high efficient MR signal acquisition, which provides a high level of comfort to a patient, a MRI system and method are suggested, where image data from an object are acquired while the object is moving with variable speed relative to the MRI system, and where the image data are combined and an image of the object is reconstructed.

Abstract translation: 本发明涉及一种MRI系统和一种用这种系统生产图像的方法。 为了提供具有高效MR信号采集的MR成像技术，其为患者提供了高水平的舒适性，建议了MRI系统和方法，其中在物体运动时获取来自对象的图像数据， 相对于MRI系统的速度，并且其中图像数据被组合并且重建对象的图像。

公开(公告)号：WO2004106959A1

公开(公告)日：2004-12-09

申请号：PCT/IB2004/050779

申请日：2004-05-26

Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V. ,  VAN DEN BRINK, Johan, S. ,  FUDERER, Miha ,  HARVEY, Paul, R.

Inventor： VAN DEN BRINK, Johan, S. ,  FUDERER, Miha ,  HARVEY, Paul, R.

IPC: G01R33/28

CPC classification number: G01R33/56375 ,  G01R33/5601

Abstract: A system is described for the acquisition of a magnetic resonance scan of a subject. The system is particularly useful when the subject which contains a volume of interest which is larger than the field of view of the system and when the scan includes a time dependent signal. The system also comprising a subject support capable of movement relative to the field of view. The system presented is arranged to perform at least a first scan and a second scan, the first scan being arranged so that signal is acquired from the central region of k-space as the subject support is moved through the field of view in a first direction and the second scan being arranged so that signal is acquired from the periphery of k -space as the subject support is moved through the field of view in a second direction.

Abstract translation: 描述了用于获取对象的磁共振扫描的系统。 当包含感兴趣的体积大于系统视野的主体以及扫描包括时间相关信号时，该系统特别有用。 该系统还包括能够相对于视场移动的对象支撑。 所呈现的系统被布置成执行至少第一扫描和第二扫描，第一扫描被布置成使得当主体支架沿第一方向移动通过视场时从k空间的中心区域获取信号 并且第二扫描被布置成使得当主体支架沿着第二方向移动通过视场时，从k空间的周边获取信号。

公开(公告)号：WO2004053514A1

公开(公告)日：2004-06-24

申请号：PCT/IB2003/005015

申请日：2003-11-04

Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V. ,  HAM, Cornelis, L., G. ,  FUDERER, Miha

Inventor： HAM, Cornelis, L., G. ,  FUDERER, Miha

IPC: G01R33/36

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

Abstract: The invention relates to an MRI system (1) for nuclear magnetic resonance imaging which comprises a plurality of transmit coils (11, 12). Each coil receives a coil drive signal (SD1, SD2). The respective coil drive signals have the same shape, but may have a different amplitude and phase, controlled by a controller (103) on the basis of characteristic information in a memory (104) as well as user input information. The controller is designed to set the respective amplitudes and phases in such a way that the resultant overall B1 field is as homogeneous as possible in a volume of interest.

Abstract translation: 本发明涉及用于核磁共振成像的MRI系统（1），其包括多个发射线圈（11,12）。 每个线圈接收线圈驱动信号（SD1，SD2）。 相应的线圈驱动信号具有相同的形状，但是可以具有不同的幅度和相位，其基于存储器（104）中的特征信息以及用户输入信息由控制器（103）控制。 控制器设计成以相应的方式设置相应的幅度和相位，使得所得到的总体B1场在感兴趣的体积中尽可能均匀。

公开(公告)号：WO2011077321A3

公开(公告)日：2011-09-01

申请号：PCT/IB2010055834

申请日：2010-12-15

Applicant: KONINKL PHILIPS ELECTRONICS NV ,  FUDERER MIHA

Inventor： FUDERER MIHA

IPC: G01R33/563

CPC classification number: G01R33/56358 ,  A61B5/0051 ,  A61B5/055

Abstract: A magnetic resonance elastography method includes application of mechanical oscillations to an object to be examined to generate mechanical waves in the object. Vibration sensitising gradient magnetic field pulses are applied with an RF-set of RF excitation pulses to excite spins in the object. Gradient magnetic fields are applied so as to spatially encode magnetic resonance signals from the object. The vibration sensitising gradient pulses are surrounded in time by RF excitation pulses of the RF-set the RF pulses of the RF-set have no net flip angle or a net flip angle less than a predetermined threshold. This enable to reduce the echo time TE to be shorter than the oscillation time (Tosc) of the mechanical oscillations.

Abstract translation: 磁共振弹性成像方法包括将机械振荡应用于被检查物体以在物体中产生机械波。 振动敏化梯度磁场脉冲被施加RF射频激发脉冲，以激发物体中的自旋。 施加梯度磁场以便对来自物体的磁共振信号进行空间编码。 振动敏化梯度脉冲在RF集合的RF激励脉冲的时间内被包围，RF集合的RF脉冲没有净翻转角或小于预定阈值的净翻转角。 这使得能够将回波时间TE减小到比机械振荡的振荡时间（Tosc）更短。

公开(公告)号：WO2011077355A1

公开(公告)日：2011-06-30

申请号：PCT/IB2010/055950

申请日：2010-12-20

Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V. ,  FUDERER, Miha

Inventor： FUDERER, Miha

IPC: G01R33/563

CPC classification number: G01R33/56358

Abstract: A magnetic resonance elastography method includes application of mechanical oscillations with an oscillation period (T) to an object to be examined to generate mechanical waves in the object. A motion sensitive magnetic resonance acquisition sequence with repetition time T R issued to acquire magnetic resonance signals from the object. This acquisition sequence including application of one or more phase encoding steps within an individual repetition time. The repetition time times the number of phase encodings within one repetition time is not equal to an integer multiple of the oscillation period. Thus a magnetic resonance image of the wave pattern is reconstructed from the magnetic resonance signals assembled in a sample space spanned by the phase of the mechanical oscillation and the phase encoding.

Abstract translation: 磁共振弹性成像方法包括将振荡周期（T）施加到待检查对象的机械振荡以在物体中产生机械波。 发出具有重复时间TR的运动敏感磁共振采集序列，以从物体采集磁共振信号。 该采集序列包括在单独的重复时间内应用一个或多个相位编码步骤。 重复时间乘以一个重复时间内的相位编码数不等于振荡周期的整数倍。 因此，从组装在由机械振荡和相位编码的相位所跨越的采样空间中的磁共振信号来重建波形图案的磁共振图像。

公开(公告)号：WO2006120594A1

公开(公告)日：2006-11-16

申请号：PCT/IB2006/051331

申请日：2006-04-28

Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V. ,  HAM, Cornelis, L., G. ,  FUDERER, Miha ,  VRINTEN, Marinus, L., A.

Inventor： HAM, Cornelis, L., G. ,  FUDERER, Miha ,  VRINTEN, Marinus, L., A.

IPC: G01R33/38 ,  G01R33/36

CPC classification number: G01R33/422 ,  G01R33/36 ,  G01R33/3628 ,  G01R33/3806

Abstract: The present invention relates to a system and method magnetic resonance (MR) imaging. Furthermore the invention relates to the use of a material and to a computer program. In order to provide a technique which allows to prevent standing waves in an RF cage (3) of a MR imaging system (1) in a very cheap and simple way a MR imaging system (1) is suggested, which comprises a MR imaging apparatus (2) comprising an open magnet system (7), wherein operation of the MR imaging apparatus (2) creates a magnetic resonance field having a MR frequency, and which further comprises an RF cage (3), configured to enclose the MR imaging apparatus (2), wherein the walls (6) of the RF cage (3) are at least partly provided with a covering (5, 10), said covering (5, 10) is adapted in a way that the wavelength of the MR frequency within the covering (5, 10) is reduced.

Abstract translation: 本发明涉及一种系统和方法磁共振（MR）成像。 此外，本发明涉及材料和计算机程序的使用。 为了提供允许以非常便宜和简单的方式在MR成像系统（1）的RF笼（3）中防止驻波的技术，建议MR成像系统（1），其包括MR成像装置 （2），其包括开放磁体系统（7），其中所述MR成像装置（2）的操作产生具有MR频率的磁共振场，并且还包括RF笼（3），其被配置为包围所述MR成像装置 （2），其中所述RF笼（3）的壁（6）至少部分地设置有覆盖物（5,10），所述覆盖物（5,10）以使得MR频率的波长 在覆盖物（5,10）内减少。

公开(公告)号：WO2005093450A1

公开(公告)日：2005-10-06

申请号：PCT/IB2005/050960

申请日：2005-03-21

Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V. ,  FUDERER, Miha ,  DONDERS, Frans, P., A., J., M.

Inventor： FUDERER, Miha ,  DONDERS, Frans, P., A., J., M.

IPC: G01R33/422

CPC classification number: G01R33/34076 ,  G01R33/246

Abstract: The invention relates to a system for magnetic resonance imaging (MRI). Such systems face an additional contribution to the inhomogeneity of the radio frequency (RF) field when high magnetic fields are applied. The invention tries to improve the homogeneity of the RF field for high field strengths, particularly for field strengths at or above 3 tesla. To improve the homogeneity an electrically conducting material (4) is positioned within the cavity (2) of the system. The material has a conductivity and a thickness which ensure that the total radial conductance in an xy-plane perpendicular to the symmetry axis of the cavity becomes isotropic.

Abstract translation: 本发明涉及一种用于磁共振成像（MRI）的系统。 当施加高磁场时，这样的系统对射频（RF）场的不均匀性有额外的贡献。 本发明试图提高高场强的RF场的均匀性，特别是对于3特斯拉以上的场强。 为了提高均匀性，导电材料（4）位于系统的空腔（2）内。 该材料具有导电性和厚度，其确保垂直于腔的对称轴的xy平面中的总径向电导变为各向同性。

公开(公告)号：WO2005078470A2

公开(公告)日：2005-08-25

申请号：PCT/IB2005/050458

申请日：2005-02-03

Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V. ,  PHILIPS INTELLECTUAL PROPERTY & STANDARDS GMBH ,  FUDERER, Miha ,  EGGERS, Holger

Inventor： FUDERER, Miha ,  EGGERS, Holger

IPC: G01R33/561

CPC classification number: G01R33/5611

Abstract: A novel magnetic resonance imaging method and apparatus is described wherein an image is derived from sub-sampled magnetic resonance signals and on the basis of the spatial sensitivity profile of each receiving antenna. A sequence of RF-pulses and gradients is applied, which sequence corresponds to a set of trajectories containing at least one substantially non-linear trajectory in k-space, wherein the density of said trajectory set being substantially lower than the density corresponding to the object size. Each signal along said trajectory set is sampled at least at two different receiver antenna positions. The image is reconstructed by converting the data of said signals to a Cartesian grid by convolution with a gridding kernel, whereby the gridding kernel is specific for each antenna, differs between one region and another in k-space, and is a Fourier-transform of a pattern weighted for each antenna with respect to the Cartesian grid.

Abstract translation: 描述了一种新颖的磁共振成像方法和装置，其中根据次采样的磁共振信号并基于每个接收天线的空间灵敏度分布导出图像。 应用RF脉冲和梯度的序列，该序列对应于在k空间中包含至少一个基本非线性轨迹的一组轨迹，其中所述轨迹集的密度基本上低于对应于物体的密度 尺寸。 至少在两个不同的接收机天线位置对沿着所述轨迹组的每个信号进行采样。 通过与网格内核卷积将所述信号的数据转换为笛卡尔网格来重建图像，由此网格核对于每个天线是特定的，在k空间中在一个区域和另一个区域之间是不同的，并且是傅立叶变换 对于每个天线相对于笛卡尔网格加权的图案。