公开(公告)号：US10466325B2

公开(公告)日：2019-11-05

申请号：US15657343

申请日：2017-07-24

申请人： Andreas Greiser ,  David Grodzki ,  Daniel Nico Splitthoff

发明人： Andreas Greiser ,  David Grodzki ,  Daniel Nico Splitthoff

IPC分类号： G01V3/00 ,  G01R33/54 ,  G01R33/30 ,  G01R33/385 ,  G01R33/28 ,  G01R33/36

摘要： The disclosure relates to a method for determining a sequence information element of a magnetic resonance sequence, a computer program product and an evaluation unit for performing such a method, and also a magnetic resonance device having such an evaluation unit. The method includes a determination of the sequence information element based on at least one pattern of the magnetic resonance sequence.

公开(公告)号：US10297023B2

公开(公告)日：2019-05-21

申请号：US15285626

申请日：2016-10-05

申请人： David Grodzki ,  Arne Hengerer ,  Michael Kaus ,  Elena Nioutsikou ,  Sebastian Schmidt

发明人： David Grodzki ,  Arne Hengerer ,  Michael Kaus ,  Elena Nioutsikou ,  Sebastian Schmidt

IPC分类号： G06K9/00 ,  G06T7/00 ,  G06T11/00

摘要： The embodiments relate to a reconstructing an image of an examination object, a medical imaging apparatus, and a computer program product where a first image data record is acquired with a first imaging modality and at least one further image data record of at least one further imaging modality is provided. At least one first image is reconstructed on the basis of the first image data record using the at least one further image data record.

公开(公告)号：US09696400B2

公开(公告)日：2017-07-04

申请号：US14057361

申请日：2013-10-18

申请人： David Grodzki ,  Mathias Nittka

发明人： David Grodzki ,  Mathias Nittka

IPC分类号： G01V3/00 ,  G01R33/54 ,  G01R33/483 ,  G01R33/385 ,  G01R33/561

CPC分类号： G01R33/543 ,  G01R33/3854 ,  G01R33/4833 ,  G01R33/5617

摘要： A method and a pulse sequence optimization device to optimize a pulse sequence for a magnetic resonance system, wherein the pulse sequence includes at least one refocusing pulse, one slice selection gradient pulse, and one gradient spoiler pulse. The pulse duration of the refocusing pulse is shortened, and the pulse duration of the slice selection gradient pulse is adapted to the shortened pulse duration of the refocusing pulse. The amplitude of the slice selection gradient pulse is increased so that the same slice thickness is selected as before the shortening of the pulse duration of the refocusing pulse. The pulse shape of the gradient spoiler pulse is adapted without changing a total spoiler moment, and an optimally shortened pulse duration of the refocusing pulse is achieved when, with the adaptation of the pulse shape of the gradient spoiler pulse, the maximum amplitude of the gradient spoiler pulse equals the amplitude of the slice selection gradient pulse, and an edge steepness of the gradient spoiler pulse is minimized.

公开(公告)号：US09696399B2

公开(公告)日：2017-07-04

申请号：US14050580

申请日：2013-10-10

申请人： David Grodzki

发明人： David Grodzki

IPC分类号： G01V3/00 ,  G01R33/48 ,  G01R33/56 ,  A61B5/055

CPC分类号： G01R33/482 ,  A61B5/055 ,  G01R33/4816 ,  G01R33/5602

摘要： In a method and magnetic resonance apparatus for image acquisition using a magnetic resonance sequence in which k-space corresponding to the imaging area is scanned, a first region of k-space, which does not include the center of k-space, is scanned radially along a number of spokes emanating from the k-space center, and at least two phase coding gradients are completely ramped up before the excitation pulse. A second central region of k-space, which remains without the first region, is scanned in a Cartesian manner. For contrast increase a pre-pulse is provided before a predetermined number of individual measurements. The number of spokes is selected so a measurement point nearest to the k-space center is measured at a predetermined point in time after the pre-pulse, which is optimal for signal-to-noise ratio and/or contrast.

公开(公告)号：US20170045594A1

公开(公告)日：2017-02-16

申请号：US15230674

申请日：2016-08-08

申请人： David Grodzki ,  Thorsten Speckner

发明人： David Grodzki ,  Thorsten Speckner

IPC分类号： G01R33/385 ,  G01R33/56 ,  G01B7/31 ,  G01R33/54

CPC分类号： G01R33/4833 ,  G01R33/385 ,  G01R33/543

摘要： A method for optimizing a slice orientation for an examination using a magnetic resonance machine is provided. One or more device limitation of the magnetic resonance machine is provided. The device limitation includes, for at least one of the one or more gradient axes, a maximum gradient strength and/or a maximum gradient slew rate. At least one measurement parameter value of the examination and an original slice orientation are also provided. Rotational-angle information is determined from device limitations, measurement parameter values, and the original slice orientation. The rotational-angle information is used to optimize the original slice orientation, and the magnetic resonance machine captures measurement data on the basis of the optimized slice orientation.

摘要翻译： 提供了使用磁共振机优化用于检查的切片取向的方法。 提供磁共振机器的一个或多个装置限制。 对于所述一个或多个梯度轴中的至少一个，所述装置限制包括最大梯度强度和/或最大坡度转换速率。 还提供了检查的至少一个测量参数值和原始切片方位。 从设备限制，测量参数值和原始切片方向确定旋转角度信息。 旋转角度信息用于优化原始切片方向，磁共振机器基于优化的切片方向捕获测量数据。

公开(公告)号：US20160356871A1

公开(公告)日：2016-12-08

申请号：US15151313

申请日：2016-05-10

申请人： David Grodzki

发明人： David Grodzki

IPC分类号： G01R33/50 ,  G01R33/30 ,  G01R33/54 ,  G01R33/385

CPC分类号： G01R33/50 ,  G01R33/483 ,  G01R33/546

摘要： Disclosed herein are a method for the quantification of a volume element composition and a magnetic resonance device and computer program product for carrying out the method. The method for the quantification of a volume element composition of an object under examination using magnetic resonance signals, which are generated by the interaction of electromagnetic waves with at least one component of the volume element, includes providing of a plurality of signal evolutions including an evaluation signal evolution of the magnetic resonance signals and at least one database signal evolution. The signal evolutions are used to determine weighting factors for the at least one component of the volume element. Each signal evolution includes a plurality of corresponding evaluation points, where each evaluation point is assigned a signal value.

摘要翻译： 本文公开了用于量化体积元素组成的方法和用于实施该方法的磁共振装置和计算机程序产品。 使用由电磁波与体积元件的至少一个分量的相互作用产生的使用磁共振信号来量化被检查物体的体积元素组成的方法包括提供多个信号演变，包括评价 磁共振信号的信号演化和至少一个数据库信号演化。 信号演进用于确定体积元素的至少一个分量的加权因子。 每个信号演进包括多个相应的评估点，其中每个评估点被分配信号值。

公开(公告)号：US20140091794A1

公开(公告)日：2014-04-03

申请号：US14039238

申请日：2013-09-27

申请人： David Grodzki

发明人： David Grodzki

IPC分类号： G01R33/48

CPC分类号： G01R33/4816 ,  A61B5/055 ,  G01R33/4824

摘要： In a method to operate a magnetic resonance apparatus with a magnetic resonance sequence—in particular a PETRA sequence—in which k-space is radially scanned for an image acquisition in a first region of k-space that does not include the center of k-space, and in which an excitation pulse is radiated as the full strength of at least two phase coding gradients is reached, and in which k-space is scanned in a Cartesian manner—in particular by single point imaging—in a second region of k-space remaining without the first region, the gradient strength corresponding to a shortest total acquisition time is determined automatically from predetermined sequence parameters and/or sequence parameters defined by a user. The sequence parameters parameterize the magnetic resonance sequence and describe the number of acquisitions for the regions of k-space and the repetition time, and the gradient strength is indicated to a user as a recommendation and/or is set automatically in the implementation of the magnetic resonance sequence.

摘要翻译： 在具有磁共振序列（特别是PETRA序列）的操作磁共振装置的方法中，其中k空间被径向扫描以在不包括k-空心的中心的k空间的第一区域中进行图像采集， 空间，并且其中激发脉冲被辐射为达到至少两个相位编码梯度的全部强度，并且其中k空间以笛卡尔方式扫描，特别是通过单点成像在k的第二区域中扫描 - 没有第一区域的空间，从用户定义的预定序列参数和/或序列参数自动确定对应于最短总采集时间的梯度强度。 顺序参数参数化磁共振序列，并描述k空间和重复时间的区域的采集次数，梯度强度作为推荐指示给用户，和/或自动设置在磁场的实现中 共振序列。

公开(公告)号：US08604785B2

公开(公告)日：2013-12-10

申请号：US13040426

申请日：2011-03-04

申请人： Michael Deimling ,  David Grodzki

发明人： Michael Deimling ,  David Grodzki

IPC分类号： G01R33/44

CPC分类号： G01R33/561 ,  G01R33/4816

摘要： In a method to create an image data set by operating a magnetic resonance system, at least two phase coding gradients are switched in respective spatial directions, an RF excitation pulse is radiated and a raw data point in a k-space data set belonging to the image data set is read out a predetermined time period after the radiation of the RF excitation pulse. The predetermined time period thereby corresponds to the maximum of a set of a respective minimum time period for each of the at least two phase coding gradients. The minimum time period of the respective at least one of the at least two phase coding gradients is determined depending on the strength of the respective phase coding gradient such that the Nyquist theorem is complied with.

摘要翻译： 在通过操作磁共振系统创建图像数据集的方法中，至少两个相位编码梯度在相应的空间方向上切换，RF激励脉冲被辐射，并且在k空间数据集中原始数据点属于 在RF激励脉冲的辐射之后的预定时间段读出图像数据组。 因此，预定时间段对应于至少两个相位编码梯度中的每一个的相应最小时间段的集合的最大值。 根据各相位编码梯度的强度来确定至少两个相位编码梯度中的相应的至少一个相位编码梯度的最小时间周期，使得遵守奈奎斯特定理。

公开(公告)号：US08497679B2

公开(公告)日：2013-07-30

申请号：US13020306

申请日：2011-02-03

申请人： David Grodzki

发明人： David Grodzki

IPC分类号： G01V3/00

CPC分类号： G01R33/4816 ,  G01R33/5616

摘要： In a magnetic resonance method and system to create a difference image, essentially only one k-space point in a k-space data set belonging to the difference image is acquired at least twice in the form of k-space measurement values after a radiation of an RF excitation pulse. The difference image is thereby created depending on acquired k-space data set by means of taking the difference of the respective at least two results acquired per k-space point. For each essentially only one k-space point shift multiple phase coding gradients are activated in respective spatial directions, followed by a first readout of the essentially only one k-space point for an acquisition of a first of the k-space measurement values. The phase coding gradients are subsequently modified such that a gradient moment for each of the phase coding gradients is zero for a time period from the first readout of the essentially only one k-space point up to a second readout of the essentially only one k-space point. The essentially only one k-space point is subsequently read out a second time.

摘要翻译： 在用于产生差分图像的磁共振方法和系统中，属于差分图像的k空间数据集中基本上只有一个k空间点以k空间测量值的形式获取至少两次， RF激励脉冲。 因此，通过取得每k空间点获取的各个至少两个结果的差异，根据所获取的k空间数据来创建差异图像。 对于每个基本上只有一个k空间点移位，在相应的空间方向上激活多相位编码梯度，接着是基本上只有一个k空间点的第一次读出，用于获取第一个k空间测量值。 随后修改相位编码梯度，使得在从基本上只有一个k空间点的第一次读出到基本上仅一个k-空间点的第二次读出的时间段内，每个相位编码梯度的梯度矩为零， 空间点 随后第二次读出基本上只有一个k空间点。

公开(公告)号：US08482283B2

公开(公告)日：2013-07-09

申请号：US12835846

申请日：2010-07-14

申请人： David Grodzki

发明人： David Grodzki

IPC分类号： G01R33/48

CPC分类号： G01R33/56536 ,  G01R33/5601

摘要： In a method and magnetic resonance system to determine the strength of a magnetic interference field that is caused by an interference object in a magnetic resonance image data acquisition, the interference object having a magnetic susceptibility that differs from the magnetic susceptibility of the material that surrounds the interference object image data acquired with the imaging magnetic resonance measurement that depict an examination subject that contains the interference object are made available in a form that allows the determination of at least one geometric variable of an image artifact in the image data that was caused by the magnetic interference field. The strength of the magnetic interference field that is caused by the interference object is then determined on the basis of the determined geometric variable of the image artifact.

摘要翻译： 在用于确定由磁共振图像数据采集中的干扰对象引起的磁干扰场的强度的方法和磁共振系统中，所述干扰对象具有不同于围绕所述磁共振图像的材料的磁化率的磁化率 使用描绘包含干涉对象的检查对象的成像磁共振测量获取的干涉物体图像数据可以以允许在由图像数据引起的图像数据中确定图像伪像的至少一个几何变量的形式获得 磁干扰场。 然后根据确定的图像伪像的几何变量来确定由干涉对象引起的磁干扰场的强度。