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1. 发明申请

US20130015854A1 METHOD AND PROCESSOR AND MAGNETIC RESONANCE APPARATUS FOR DESIGNING RF PULSES TO MITIGATE OFF-RESONANCE EFFECTS 有权
标题翻译：用于设计RF脉冲以减轻非共振效应的方法和处理器和磁共振装置
公开(公告)号：US20130015854A1
公开(公告)日：2013-01-17
申请号：US13181868
申请日：2011-07-13
申请人： Elfar Adalsteinsson , Hans-Peter Fautz , Kawin Setsompop , Lawrence Wald
发明人： Elfar Adalsteinsson , Hans-Peter Fautz , Kawin Setsompop , Lawrence Wald
IPC分类号： G01R33/44
CPC分类号： G01R33/56563 , G01R33/446 , G01R33/5607 , G01R33/5612 , G01R33/5614
摘要： In a magnetic resonance apparatus and operating method therefor, and in a processor that is programmed to design RF pulses for operating such a magnetic resonance apparatus, the RF pulses are designed to mitigate off-resonance effects caused by inhomogeneity of the basic (B0) magnetic field in the magnetic resonance apparatus. The RF pulses of a parallel transmit array are designed with different spatial phase distributions, that deviate from a constant phase from pulse-to-pulse, with the absolute value of the difference between respective spatial phase distributions of any two successively radiated RF pulses corresponding to the off-resonance that is caused by B0-inhomogeneity during the time between the radiation of the successive pulses. Additionally, or separately, currents supplied to the shim coils can be taken into account in the design of the RF pulses as an additional degree of freedom, with the shimming of the basic magnetic field produced by the shim currents deviating from shim currents designed to ideally produce a homogenous B0 field.
摘要翻译：在一种磁共振装置及其操作方法中，并且在被编程为设计用于操作这种磁共振装置的RF脉冲的处理器中，RF脉冲被设计成减轻由基本（B0）磁性的不均匀性引起的非共振效应磁场。平行发射阵列的RF脉冲被设计为具有不同的空间相位分布，其偏离了脉冲到脉冲的恒定相位，对应于任何两个相继辐射的RF脉冲的相应空间相位分布之间的差的绝对值在连续脉冲的辐射期间由B0不均匀性引起的非共振。此外，或者单独地，作为附加自由度，在RF脉冲的设计中可以考虑提供给垫片线圈的电流，同时由偏置电流产生的基本磁场的匀场偏离设计成理想的电流产生均匀的B0场。

2. 发明授权

US08866478B2 Method and processor and magnetic resonance apparatus for designing RF pulses to mitigate off-resonance effects 有权
标题翻译：用于设计RF脉冲以减轻非共振效应的方法和处理器和磁共振装置
公开(公告)号：US08866478B2
公开(公告)日：2014-10-21
申请号：US13181868
申请日：2011-07-13
申请人： Elfar Adalsteinsson , Hans-Peter Fautz , Kawin Setsompop , Lawrence Wald
发明人： Elfar Adalsteinsson , Hans-Peter Fautz , Kawin Setsompop , Lawrence Wald
IPC分类号： G01V3/00 , G01R33/565 , G01R33/561 , G01R33/56 , G01R33/44
CPC分类号： G01R33/56563 , G01R33/446 , G01R33/5607 , G01R33/5612 , G01R33/5614
摘要： In a magnetic resonance apparatus and operating method therefor, and in a processor that is programmed to design RF pulses for operating such a magnetic resonance apparatus, the RF pulses are designed to mitigate off-resonance effects caused by inhomogeneity of the basic (B0) magnetic field in the magnetic resonance apparatus. The RF pulses of a parallel transmit array are designed with different spatial phase distributions, that deviate from a constant phase from pulse-to-pulse, with the absolute value of the difference between respective spatial phase distributions of any two successively radiated RF pulses corresponding to the off-resonance that is caused by B0-inhomogeneity during the time between the radiation of the successive pulses. Additionally, or separately, currents supplied to the shim coils can be taken into account in the design of the RF pulses as an additional degree of freedom, with the shimming of the basic magnetic field produced by the shim currents deviating from shim currents designed to ideally produce a homogenous B0 field.
摘要翻译：在一种磁共振装置及其操作方法中，并且在被编程为设计用于操作这种磁共振装置的RF脉冲的处理器中，RF脉冲被设计成减轻由基本（B0）磁性的不均匀性引起的非共振效应磁场。平行发射阵列的RF脉冲被设计为具有不同的空间相位分布，其偏离了脉冲到脉冲的恒定相位，对应于任何两个相继辐射的RF脉冲的相应空间相位分布之间的差的绝对值在连续脉冲的辐射期间由B0不均匀性引起的非共振。此外，或者单独地，作为附加自由度，在RF脉冲的设计中可以考虑提供给垫片线圈的电流，同时由偏置电流产生的基本磁场的匀场偏离设计成理想的电流产生均匀的B0场。

3. 发明授权

US10345399B2 Method and local coil system for producing a magnetic resonance radio frequency field 有权
公开(公告)号：US10345399B2
公开(公告)日：2019-07-09
申请号：US14245181
申请日：2014-04-04
申请人： Hans-Peter Fautz , Wolfgang Renz , Franz Schmitt
发明人： Hans-Peter Fautz , Wolfgang Renz , Franz Schmitt
IPC分类号： G01R33/28 , G01R33/34 , G01R33/36 , G01R33/3415
摘要： A magnetic resonance RF field is produced in a magnetic resonance imaging system that includes a main magnetic field apparatus and an object-bearing table movable relative to the main magnetic field apparatus and on which a local coil system is arranged. The local coil system includes a plurality of transmission elements. A current location of the object-bearing table relative to the main magnetic field apparatus is established. The transmission elements are automatically connected based on the current location of the object-bearing table.

4. 发明授权

US10135549B2 Operation of a transmission device of a magnetic resonance device 有权
公开(公告)号：US10135549B2
公开(公告)日：2018-11-20
申请号：US14251595
申请日：2014-04-12
申请人： Holger Adolf , Thomas Benner , Hans-Peter Fautz , Joerg Ulrich Fontius , Rene Gumbrecht
发明人： Holger Adolf , Thomas Benner , Hans-Peter Fautz , Joerg Ulrich Fontius , Rene Gumbrecht
IPC分类号： H04B17/00 , G01R33/36 , H04B17/12 , G01R33/561 , G01R33/58
摘要： A method for operating a transmission device of a magnetic resonance device is provided. In order to actuate coil elements of a radiofrequency coil with different phases, phase differences in a reference plane are taken into consideration. In a first calibration measurement to be performed once for each transmission path, a first phase of a transmitted radiofrequency signal is measured by an internal measuring device installed permanently in the transmission device spaced apart from the reference plane. A second phase of the transmitted radiofrequency signal is measured by a second, external measuring device to be connected to the reference plane for the first calibration measurement. At least one phase of the first phase and the second phase is taken into consideration in the phase-accurate actuating of the coil elements and/or for correcting further measurements with the internal measuring device.

5. 发明授权

US09709643B2 Method and apparatus for SAR reduction using B0 specific RF excitation 有权
公开(公告)号：US09709643B2
公开(公告)日：2017-07-18
申请号：US14076017
申请日：2013-11-08
申请人： Hans-Peter Fautz , Rene Gumbrecht
发明人： Hans-Peter Fautz , Rene Gumbrecht
IPC分类号： G01V3/00 , G01R33/28 , G01R33/483
CPC分类号： G01R33/288 , G01R33/4833
摘要： A method for generation of a radio-frequency (RF) pulse for excitation of nuclear spins in a predetermined layer of a specimen for magnetic resonance imaging and a magnetic resonance imaging device for performing the method are provided. The method includes determining a variation of a magnetic field in a measuring volume, and defining a spectral frequency distribution of the RF pulse. The RF pulse with the spectral frequency distribution is configured to excite nuclear spins in the specimen. The nuclear spins are polarized by the magnetic field at a predetermined flip angle in the measuring volume under a boundary condition of a substantially minimum energy content. The method also includes generating the RF pulse with the defined spectral frequency distribution.

6. 发明授权

US09229083B2 Magnetic resonance method and system to generate an optimized MR image of an examination subject 有权
标题翻译：磁共振法和系统生成检查对象的优化MR图像
公开(公告)号：US09229083B2
公开(公告)日：2016-01-05
申请号：US13247428
申请日：2011-09-28
申请人： Hans-Peter Fautz
发明人： Hans-Peter Fautz
IPC分类号： G01R33/48 , G01R33/28 , G01R33/561 , A61B5/055 , G01R33/565
CPC分类号： G01R33/5612 , A61B5/055 , G01R33/5659
摘要： A magnetic resonance method and system for generation of an optimized MR image of an examination subject operate as follows. A pulse sequence including a series of at least two RF pulses is radiated into the examination subject to generate at least one optimized signal, wherein the second and possibly every additional RF pulse is radiated before the effect of the first or a preceding RF pulse on the spin system in the examination subject has decayed. The radiated RF pulses are generated by parallel transmission coils. At least the signal resulting after the last radiated RF pulse of the pulse sequence is acquired. The pulse sequence is repeated with modified spatial coding until signals have been generated and acquired in a desired positional space. The optimized MR image per pulse sequence is calculated from at least one of the acquired signals.
摘要翻译：用于产生检查对象的优化MR图像的磁共振方法和系统如下操作。包括一系列至少两个RF脉冲的脉冲序列被辐射到检查对象中以产生至少一个优化的信号，其中第二个可能的每个附加RF脉冲在第一个或之前的RF脉冲的影响之前被辐射考试科目的旋转体系已经衰退。辐射RF脉冲由并行传输线圈产生。至少获得在脉冲序列的最后辐射RF脉冲之后产生的信号。用修改的空间编码重复脉冲序列，直到在期望的位置空间中产生和获取信号。从所获取的信号中的至少一个计算每个脉冲序列的优化的MR图像。

7. 发明申请

US20140132262A1 Method and Apparatus for SAR Reduction Using B0 Specific RF Excitation 有权
标题翻译：使用B0特定RF激励的SAR减少的方法和装置
公开(公告)号：US20140132262A1
公开(公告)日：2014-05-15
申请号：US14076017
申请日：2013-11-08
申请人： Hans-Peter Fautz , Rene Gumbrecht
发明人： Hans-Peter Fautz , Rene Gumbrecht
IPC分类号： G01R33/36
CPC分类号： G01R33/288 , G01R33/4833
摘要： A method for generation of a radio-frequency (RF) pulse for excitation of nuclear spins in a predetermined layer of a specimen for magnetic resonance imaging and a magnetic resonance imaging device for performing the method are provided. The method includes determining a variation of a magnetic field in a measuring volume, and defining a spectral frequency distribution of the RF pulse. The RF pulse with the spectral frequency distribution is configured to excite nuclear spins in the specimen. The nuclear spins are polarized by the magnetic field at a predetermined flip angle in the measuring volume under a boundary condition of a substantially minimum energy content. The method also includes generating the RF pulse with the defined spectral frequency distribution.
摘要翻译：提供了一种用于产生用于磁共振成像用试样的预定层中的核自旋激发的射频（RF）脉冲的方法和用于执行该方法的磁共振成像装置。该方法包括确定测量体积中的磁场的变化，并且确定RF脉冲的频谱频率分布。具有频谱分布的RF脉冲被配置为激发样品中的核自旋。在基本上最小的能量含量的边界条件下，核自旋在测量体积中以预定翻转角的磁场进行极化。该方法还包括以定义的频谱分布产生RF脉冲。

8. 发明申请

US20130134973A1 Method for Determining a Control Sequence with Parallel Transmission 有权
标题翻译：用于确定并行传输的控制序列的方法
公开(公告)号：US20130134973A1
公开(公告)日：2013-05-30
申请号：US13686811
申请日：2012-11-27
申请人： Hans-Peter Fautz
发明人： Hans-Peter Fautz
IPC分类号： G01R33/54 , G01R33/341
CPC分类号： G01R33/543 , G01R33/341 , G01R33/583
摘要： A method for determining a set of control parameters of a control sequence for a magnetic resonance device is provided. The set of control parameters is chosen from a plurality of sets of basic parameters. The method includes determining a mean flip angle for each set of basic parameters in an imaging region where an object exists using the set of basic parameters with a first measuring method. For each set of basic parameters, a signal strength of a magnetic resonance signal generated in the case of a reference flip angle of a second measuring method distinguished by a signal maximum or a signal minimum is determined, and the set of basic parameters having a signal strength that is extremal in accordance with the choice of reference flip angle is chosen as the set of control parameters.
摘要翻译：提供了一种用于确定磁共振装置的控制序列的一组控制参数的方法。从多组基本参数中选择一组控制参数。该方法包括使用第一测量方法使用一组基本参数来确定存在对象的成像区域中的每组基本参数的平均翻转角度。对于每组基本参数，确定在由信号最大值或信号最小值区分的第二测量方法的参考翻转角的情况下产生的磁共振信号的信号强度，并且具有信号的基本参数集选择根据参考翻转角选择极值的强度作为控制参数的集合。

9. 发明申请

US20060261810A1 MRT imaging on the basis of conventional PPA reconstruction methods 有权
公开(公告)号：US20060261810A1
公开(公告)日：2006-11-23
申请号：US11409353
申请日：2006-04-21
申请人： Hans-Peter Fautz , Stephan Kannengiesser
发明人： Hans-Peter Fautz , Stephan Kannengiesser
IPC分类号： G01V3/00
CPC分类号： G01R33/56375 , G01R33/5611 , G01R33/56383
摘要： In a method for magnetic resonance imaging on the basis of a partially-parallel acquisition (PPA) reconstruction method and a magnetic resonance tomography apparatus, data for at least two two-dimensional slices of a patient are acquired (which two-dimensional slices are displaced in the direction of a slice-selection gradient (z-gradients) defining the slice-normal direction) with at least one data acquisition in k-space (which acquisition forms a partial data set) per slice with a number of component coils, with the sum of all partial data sets forming a complete data set in k-space. The coil sensitivities of each component coil are determined on the basis of the complete data set. At least one partial data set of each slice is completed with a PPA reconstruction method on the basis of the determined coil sensitivities. The completed slices in k-space are transformed into whole images in the spatial domain.

10. 发明授权

US06888349B2 Nuclear magnetic resonance (NMR) multi-slice imaging homogeneous preparation encoding (HoPE) 有权
标题翻译：核磁共振（NMR）多层成像均匀制备编码（HoPE）
公开(公告)号：US06888349B2
公开(公告)日：2005-05-03
申请号：US10255055
申请日：2002-09-24
申请人： Hans-Peter Fautz
发明人： Hans-Peter Fautz
IPC分类号： G01R33/54 , G01V3/00
CPC分类号： G01R33/4835 , G01R33/4828
摘要： A multi-slice NMR imaging method for recording N slices (N>1) from a measuring object, wherein for complete image reconstruction, an acquisition in m (m>1) repetition steps with different spatial encoding is used, with a magnetization preparation in the form of a saturation pulse which is selective with respect to chemical shift and which is applied P times (1≦P
摘要翻译：一种用于从测量对象记录N个切片（N> 1）的多切片NMR成像方法，其中对于完整图像重建，使用具有不同空间编码的m（m> 1）个重复步骤的采集，其中磁化准备相对于化学位移选择性的饱和脉冲的形式，并且在每个重复步骤中施加P次（1 <= P

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