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1. 发明授权

US09989617B2 B1 field-based regulation within a sequence for NMR 有权
公开(公告)号：US09989617B2
公开(公告)日：2018-06-05
申请号：US13781199
申请日：2013-02-28
申请人： Jürgen Nistler , David Andrew Porter , Thorsten Speckner , Christian Wünsch
发明人： Jürgen Nistler , David Andrew Porter , Thorsten Speckner , Christian Wünsch
IPC分类号： G01R33/58 , G01R33/565 , G01R33/36
CPC分类号： G01R33/586 , G01R33/36 , G01R33/5659
摘要： A B1 magnetic field may be regulated during a magnetic resonance tomography (MRT) imaging sequence.

2. 发明授权

US09739857B2 Method and magnetic resonance apparatus for echo planar imaging with data entry into k-space along a zigzag trajectory 有权
公开(公告)号：US09739857B2
公开(公告)日：2017-08-22
申请号：US14154364
申请日：2014-01-14
申请人： David Andrew Porter , Robin Heidemann
发明人： David Andrew Porter , Robin Heidemann
IPC分类号： G01V3/00 , G01R33/48 , G01R33/561
CPC分类号： G01R33/4818 , G01R33/4824 , G01R33/5611 , G01R33/5616
摘要： In a method and apparatus for echo planar magnetic resonance (MR) imaging sequence of phase encoding gradient fields and a sequence of readout gradient fields are applied in order to produce a well-defined zigzag-type trajectory for entering raw data into k-space. Zigzag-type trajectories can be achieved that have flanks without curvature, or without significant curvature. Cartesian methods for image reconstruction of parallel MR imaging are applied to echo planar MR imaging with such zigzag-type trajectories.

3. 发明授权

US09316712B2 Magnetic resonance method and apparatus using dual echoes for data acquisition 有权
标题翻译：磁共振方法和装置采用双回波进行数据采集
公开(公告)号：US09316712B2
公开(公告)日：2016-04-19
申请号：US12425563
申请日：2009-04-17
申请人： David Andrew Porter , Christian Schwarzbauer
发明人： David Andrew Porter , Christian Schwarzbauer
IPC分类号： G01R33/565 , A61B5/055 , G01R33/48 , G01R33/561 , A61B18/00
CPC分类号： G01R33/56563 , A61B5/055 , A61B2018/00446 , G01R33/4806 , G01R33/5618
摘要： In a method and system for acquiring magnetic resonance image data from a subject, using a data acquisition unit in which a basic magnetic field is generated, a division is designated in a planar section through the subject that divides the planar section into a first section and a second section, with the homogeneity of the basic magnetic field being better in said first section than in said second section. An echo planar imaging sequence is implemented to acquire the magnetic resonance imaging data, with magnetic resonance data being acquired from the first section only from gradient echo signals in the echo planar imaging sequence, and magnetic resonance data from said the second section being acquired from both gradient echo signals and spin echo signals in the echo planar imaging sequence. The method and apparatus are particularly suited for acquiring functional magnetic resonance imaging (fMRI) data from the brain of a subject, in which the first section is an upper portion of the brain and the second section is a lower portion of the brain.
摘要翻译：在用于从对象获取磁共振图像数据的方法和系统中，使用其中产生基本磁场的数据获取单元，通过将平面部分划分成第一部分的对象在平面部分中指定划分，第二部分，基本磁场的均匀性在所述第一部分中比在所述第二部分中更好。实现回波平面成像序列以获取磁共振成像数据，其中磁共振数据仅从回波平面成像序列中的梯度回波信号从第一部分获取，并且来自所述第二部分的磁共振数据从两个回波平面成像序列中的梯度回波信号和自旋回波信号。该方法和装置特别适用于从受试者的脑中获取功能磁共振成像（fMRI）数据，其中第一部分是脑的上部，第二部分是脑的下部。

4. 发明授权

US08729897B2 Method and magnetic resonance apparatus for dynamic phase correction in a multi channel RF transmission 有权
标题翻译：用于多通道RF传输中的动态相位校正的方法和磁共振装置
公开(公告)号：US08729897B2
公开(公告)日：2014-05-20
申请号：US13196135
申请日：2011-08-02
申请人： David Andrew Porter
发明人： David Andrew Porter
IPC分类号： G01V3/00
CPC分类号： G01R33/5617 , G01R33/4836 , G01R33/56341 , G01R33/565
摘要： In a method and magnetic resonance (MR) apparatus to acquire spin echo-based MR signals of an examination subject with a multi-spin echo sequence with multiple refocusing pulses after a single excitation pulse in an MR system that has a multichannel RF transmission and reception module: detect a spatial, two-dimensional phase distribution in the examination subject is detected by acquiring navigator signals, a phase and amplitude distribution for the individual transmission channels of the RF transmission and reception module is calculated to generate a magnetic field B1 for one of the RF refocusing pulses to generate the spin echo-based MR signal under consideration of the spatial phase distribution of the navigator signals, and this RF refocusing pulse is radiated via the multichannel RF transmission and reception module with the calculated phase and amplitude distributions of the individual transmission channels.
摘要翻译：在具有多通道RF发射和接收的MR系统中的单个激励脉冲之后，利用具有多个重聚焦脉冲的多自旋回波序列获取检查对象的基于自旋回波的MR信号的方法和磁共振（MR）装置中模块：通过获取导航信号检测检查对象中的空间二维相位分布，计算RF发送和接收模块的各个传输信道的相位和幅度分布，以产生一个磁场B1 RF再聚焦脉冲，以在考虑导航信号的空间相位分布的情况下产生基于自旋回波的MR信号，并且该RF重聚焦脉冲经由多通道RF发射和接收模块以所计算的个体的相位和幅度分布被辐射传输通道。

5. 发明申请

US20140091790A1 METHOD AND MAGNETIC RESONANCE SYSTEM FOR TIME-DEPENDENT INTENSITY CORRECTION OF DIFFUSION-WEIGHTED MR IMAGES 有权
标题翻译：用于时间依赖强度校正的扩散加权MR图像的方法和磁共振系统
公开(公告)号：US20140091790A1
公开(公告)日：2014-04-03
申请号：US14043985
申请日：2013-10-02
申请人： Stefan Huwer , David Andrew Porter
发明人： Stefan Huwer , David Andrew Porter
IPC分类号： G01R33/56
CPC分类号： G01R33/56 , G01R33/56341 , G01R33/5659
摘要： In a method and magnetic resonance (MR) apparatus for time-dependent intensity correction of diffusion-weighted MR images that are acquired with a sequence of different diffusion gradient fields, different diffusion gradient fields are associated with at least one group, with the association with groups being established so that the diffusion gradient fields that are associated with the same group satisfy an orthogonality criterion. For each group, an MR result image is created from the MR images associated with the group, such that the MR result image has a suppressed direction dependency of the diffusion weighting in comparison to the constituent MR images. An intensity correction can be made based on the multiple MR result images and used to correct the constituent MR images.
摘要翻译：在用不同扩散梯度场的序列获取的扩散加权MR图像的时间依赖性强度校正的方法和磁共振（MR）装置中，不同的扩散梯度场与至少一个组相关联，与使得与相同组相关联的扩散梯度场满足正交性标准。对于每个组，从与组相关联的MR图像创建MR结果图像，使得与成像MR图像相比，MR结果图像具有抑制的扩散加权的方向依赖性。可以基于多个MR结果图像进行强度校正，并用于校正组成的MR图像。

6. 发明授权

US08508226B2 Method and magnetic resonance system to reduce distortions in diffusion imaging 有权
标题翻译：方法和磁共振系统，以减少扩散成像中的失真
公开(公告)号：US08508226B2
公开(公告)日：2013-08-13
申请号：US13020302
申请日：2011-02-03
申请人： Thorsten Feiweier , Stefan Huwer , Tony Hyun Kim , David Andrew Porter , Thorsten Speckner
发明人： Thorsten Feiweier , Stefan Huwer , Tony Hyun Kim , David Andrew Porter , Thorsten Speckner
IPC分类号： G01V3/00
CPC分类号： G01R33/44
摘要： In a method and magnetic resonance apparatus to reduce distortions in magnetic resonance diffusion imaging, a magnetic resonance data acquisition system is operated to acquire magnetic resonance data in a first measurement with a first diffusion weighting, and to acquire magnetic resonance data in a second measurement with a second, different diffusion weighting. A non-linear, system-specific distortion-correcting function is determined on the basis of system-specific information that is specific to said magnetic resonance data acquisition system. Correction parameters are calculated to correct distortions in subsequently-acquired diffusion-weighted magnetic resonance images, based on the data acquired in the first and second measurements with the system-specific distortion-correcting function applied thereto. The subsequently-acquired diffusion-weighted magnetic resonance images are corrected using the correction parameters to at least reduce distortions therein.
摘要翻译：在减小磁共振扩散成像中的失真的方法和磁共振装置中，磁共振数据采集系统被操作以在具有第一扩散加权的第一测量中采集磁共振数据，并且在第二测量中采集磁共振数据，第二个不同的扩散加权。基于特定于所述磁共振数据采集系统的系统特定信息来确定非线性系统特定的失真校正功能。基于在第一和第二测量中采集的数据与应用于其的系统特定的失真校正功能，计算校正参数以校正随后获取的扩散加权磁共振图像中的失真。使用校正参数来校正后续获取的扩散加权磁共振图像，以至少减少其中的失真。

7. 发明授权

US08487617B2 Magnetic resonance method and apparatus to reduce distortions in diffusion images 有权
标题翻译：减少扩散图像失真的磁共振方法和装置
公开(公告)号：US08487617B2
公开(公告)日：2013-07-16
申请号：US13076763
申请日：2011-03-31
申请人： Thorsten Feiweier , Tony Hyun Kim , David Andrew Porter
发明人： Thorsten Feiweier , Tony Hyun Kim , David Andrew Porter
IPC分类号： G01V3/00
CPC分类号： G01R33/56341 , G01R33/4835 , G01R33/56518
摘要： In a method and apparatus to reduce distortions in diffusion imaging, at least one first measurement is implemented with a first diffusion weighting for a number of slices that are spatially separated from one another and at least one second measurement is implemented with a second diffusion weighting for the number of slices that are spatially separated from one another. A deskewing function is determined as are correction parameters to deskew diffusion-weighted magnetic resonance images on the basis of the measurements, so that image information and/or correction parameters of different slices are linked with one another. The diffusion-weighted magnetic resonance images are distortion-corrected on the basis of the deskewing function and the correction parameters.
摘要翻译：在减少扩散成像中的失真的方法和装置中，通过第一扩散加权来实现至少一个第一测量，所述第一扩散加权用于彼此空间上分离的多个片段，并且至少一个第二测量用第二扩散加权来实现，在空间上彼此分离的切片的数量。基于测量，确定去偏移功能，作为对偏移扩散加权磁共振图像的校正参数，使得不同切片的图像信息和/或校正参数相互链接。扩散加权磁共振图像基于去偏置函数和校正参数进行失真校正。

8. 发明授权

US07205763B2 Movement-corrected multi-shot method for diffusion-weighted imaging in magnetic resonance tomography 有权
标题翻译：在磁共振断层扫描中用于扩散加权成像的运动校正多镜法
公开(公告)号：US07205763B2
公开(公告)日：2007-04-17
申请号：US11104940
申请日：2005-04-13
申请人： David Andrew Porter
发明人： David Andrew Porter
IPC分类号： G01V3/00
CPC分类号： G01R33/56341 , G01R33/56509
摘要： In a multi-shot method for diffusion-weighted imaging in magnetic resonance tomography, the sampling of the k-matrix in the readout direction ensues in segments, and immediately after acquisition of an image data set by readout of one segment by means of echo signals, a navigation data set is acquired by readout of the middle region of the k-matrix at virtually the same time. A movement-corrected diffusion-weighted MRT image is generated by combining of the image data sets with the corresponding navigation data sets and subsequent Fourier transformation.
摘要翻译：在用于磁共振断层成像中的扩散加权成像的多重方法中，读出方向上的k矩阵的采样在段中发生，并且在通过回波信号读出一个段之后立即获取图像数据集之后通过在几乎相同的时间读出k矩阵的中间区域来获取导航数据集。通过将图像数据组与相应的导航数据集合和随后的傅里叶变换组合来生成运动校正的扩散加权MRT图像。

9. 发明授权

US06946839B2 Magnetic resonance imaging method and apparatus with spatial coding using readout segmentation 失效
标题翻译：磁共振成像方法和使用读出分割的空间编码的装置
公开(公告)号：US06946839B2
公开(公告)日：2005-09-20
申请号：US10830511
申请日：2004-04-23
申请人： David Andrew Porter
发明人： David Andrew Porter
IPC分类号： G01R33/561 , G01V3/00
CPC分类号： G01R33/5615
摘要： In a method and apparatus for magnet resonance imaging, and RF excitation pulse is emitted for the excitation of spins in an object to be examined and simultaneously a slice-selection gradient is activated during the RF excitation pulse, a pulse series of refocusing pulses is emitted, a slice-selection gradient pulse is activated during each refocusing pulse, and alternating readout gradient pulse series are activated, each series being in the pulse between two refocusing pulses, with a de-phasing pulse being activated immediately before each readout gradient pulse series and a re-phasing pulse being activated immediately after the each readout gradient pulse series such that a corresponding offset is produced in the readout direction so that each readout gradient pulse series scans a part of the k-matrix in the kx direction in a serpentine-like manner, with the serpentine-like scanning of each partial section being implemented by activating short phase-coding gradient pulses during each zero point of the corresponding readout-gradient pulse series.
摘要翻译：在用于磁共振成像的方法和装置中，发射RF激发脉冲用于激发被检查物体中的自旋，并且同时在RF激励脉冲期间激活切片选择梯度，发射脉冲序列的重聚焦脉冲在每个再聚焦脉冲期间激活切片选择梯度脉冲，并激活交替读出梯度脉冲序列，每个串联在两个重聚焦脉冲之间的脉冲中，在每个读出梯度脉冲序列之前立即激活去相位脉冲，在每个读出梯度脉冲序列之后立即激活重定相脉冲，使得在读出方向上产生相应的偏移，使得每个读出梯度脉冲序列扫描k个x轴中的k个矩阵的一部分， SUB>方向以蛇形状方式进行，每个部分部分的蛇形样扫描通过激活短相位编码梯度脉冲在相应的读出梯度脉冲序列的每个零点。

10. 发明授权

US09632161B2 Method and magnetic resonance system for time-dependent intensity correction of diffusion-weighted MR images 有权
公开(公告)号：US09632161B2
公开(公告)日：2017-04-25
申请号：US14043985
申请日：2013-10-02
申请人： Stefan Huwer , David Andrew Porter
发明人： Stefan Huwer , David Andrew Porter
IPC分类号： G01V3/00 , G01R33/56 , G01R33/563 , G01R33/565
CPC分类号： G01R33/56 , G01R33/56341 , G01R33/5659
摘要： In a method and magnetic resonance (MR) apparatus for time-dependent intensity correction of diffusion-weighted MR images that are acquired with a sequence of different diffusion gradient fields, different diffusion gradient fields are associated with at least one group, with the association with groups being established so that the diffusion gradient fields that are associated with the same group satisfy an orthogonality criterion. For each group, an MR result image is created from the MR images associated with the group, such that the MR result image has a suppressed direction dependency of the diffusion weighting in comparison to the constituent MR images. An intensity correction can be made based on the multiple MR result images and used to correct the constituent MR images.

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