公开(公告)号：US20130082704A1

公开(公告)日：2013-04-04

申请号：US13630232

申请日：2012-09-28

申请人： David Grodzki

发明人： David Grodzki

IPC分类号： G01R33/44

CPC分类号： G01R33/5659 ,  A61B5/055 ,  G01R33/4816 ,  G01R33/482 ,  G01R33/4824

摘要： In a method for non-selective excitation of nuclear spin signals in an examination subject with a magnetic resonance system, RF excitation pulses are radiated to excite nuclear spin signals in the examination subject with simultaneous switching of gradients for spatial coding of the excited nuclear spin signals, wherein the RF excitation pulses are designed such that the base frequency of a radiated RF excitation pulse is adapted to the simultaneously switched gradient. By the dynamic adaptation of the radiated RF excitation pulses to the respective simultaneously switched gradients, artifacts due to insufficiently excited nuclear spins in an examination region to be examined (in particular even in examination regions that are arranged off-center) are avoided.

摘要翻译： 在用磁共振系统在检查对象中非选择性地激发核自旋信号的方法中，辐射RF激发脉冲以在检测对象中激发核自旋信号，同时切换激发的核自旋信号的空间编码的梯度 其中RF激励脉冲被设计成使得辐射RF激励脉冲的基本频率适应于同时切换的梯度。 通过将辐射的RF激励脉冲动态地适应于相应的同时切换的梯度，避免了待检查的检查区域（特别是甚至在偏心布置的检查区域）中的核自旋不充分激发的伪像）。

公开(公告)号：US20120076383A1

公开(公告)日：2012-03-29

申请号：US13245216

申请日：2011-09-26

申请人： David Grodzki

发明人： David Grodzki

IPC分类号： G06K9/00

CPC分类号： G01R33/4816 ,  G01R33/4824 ,  G01R33/4828

摘要： In a magnetic resonance method and system for automatic generation of a selective MR image from a first MR image (corresponding to raw data acquired at a first echo time after excitation pulses) and a second MR image (corresponding to raw data acquired at a second echo time after the same excitation pulses), for each image point of the MR images, a time constant is calculated for tissue to be imaged at the respective image point depending on the intensity values of the corresponding image points of the first and second MR images. The calculated time constant is compared with at least one threshold in order to associate a weighting factor with that image point. The selective MR image is generated by processing the intensity values of the image points of the first and/or second MR image with the associated weighting factors.

摘要翻译： 在用于从第一MR图像（对应于在激励脉冲之后的第一回波时间获取的原始数据）和第二MR图像（对应于在第二回波处获取的原始数据）自动生成选择性MR图像的磁共振方法和系统中， 在相同激发脉冲之后的时间），对于MR图像的每个图像点，根据第一和第二MR图像的相应图像点的强度值，计算针对要在各个图像点成像的组织的时间常数。 将计算的时间常数与至少一个阈值进行比较，以便将加权因子与该图像点相关联。 通过用相关联的加权因子处理第一和/或第二MR图像的图像点的强度值来生成选择性MR图像。

公开(公告)号：US20110215804A1

公开(公告)日：2011-09-08

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：US10422844B2

公开(公告)日：2019-09-24

申请号：US15407141

申请日：2017-01-16

申请人： Thorsten Feiweier ,  Andreas Greiser ,  Uvo Hölscher ,  Thorsten Speckner ,  David Grodzki ,  Mathias Nittka ,  Daniel Nico Splitthoff

发明人： Thorsten Feiweier ,  Andreas Greiser ,  Uvo Hölscher ,  Thorsten Speckner ,  David Grodzki ,  Mathias Nittka ,  Daniel Nico Splitthoff

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

摘要： A method for setting a MRI sequence, a magnetic resonance device, and a computer program product are provided. The method includes providing, by a limitation unit, at least one limitation; providing, by a parameter provision unit, a plurality of parameters of the sequence, wherein at least one parameter of the plurality of parameters is assigned to a default parameter value; selecting, by a selection unit, a parameter of the plurality of parameters; determining, by a simulation unit, at least one sequential pattern based on at least one default parameter value of the default parameter values; determining, by an analysis unit, a permissible range of parameter values of the selected parameter based on at least one sequential pattern and the at least one limitation; and establishing, by an establishment unit, a new parameter value of the selected parameter within the permissible range of the parameter values.

公开(公告)号：US09934357B2

公开(公告)日：2018-04-03

申请号：US14936785

申请日：2015-11-10

申请人： David Grodzki ,  Björn Heismann

发明人： David Grodzki ,  Björn Heismann

IPC分类号： G06K9/00 ,  G06F19/00

CPC分类号： G16H30/20 ,  G06F19/00 ,  G06F19/321

摘要： A method and a device for protocol adjustment for medical imaging, and a medical imaging device and a computer program product for carrying out the method, wherein the method includes providing a location-specific feature of an imaging device, ascertaining at least one location-dependent protocol boundary condition from a comparison with at least one database, and creating at least one protocol adjusted to the at least one location-dependent protocol boundary condition. At least one of the providing, ascertaining, or creating occurs automatically.

公开(公告)号：US20180052212A1

公开(公告)日：2018-02-22

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： G01R33/54 ,  G01R33/30 ,  G01R33/385

CPC分类号： G01R33/543 ,  G01R33/288 ,  G01R33/307 ,  G01R33/36 ,  G01R33/385 ,  G01R33/546

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：US20170024911A1

公开(公告)日：2017-01-26

申请号：US15218023

申请日：2016-07-23

申请人： David Grodzki

发明人： David Grodzki

IPC分类号： G06T11/00

CPC分类号： G06T11/005 ,  A61B5/055 ,  G01R33/20 ,  G01R33/543

摘要： Preparation of a scan protocol of a medical imaging apparatus is provided. A first parameter set that includes one or more first scan parameters is provided. One or more first scan parameter values that are assigned to the one or more first scan parameters are set. Based on these set one or more first scan parameter values, a second parameter set that includes one or more second scan parameters is determined. The second parameter set is provided, and one or more second scan parameter values that are assigned to the one or more second scan parameters are set. Based on the one or more first scan parameter values and/or the one or more second scan parameter values, a scan protocol is prepared. Based on the scan protocol prepared, scan data is acquired by the medical imaging apparatus.

摘要翻译： 提供了医疗成像设备的扫描协议的准备。 提供了包括一个或多个第一扫描参数的第一参数集。 设置分配给一个或多个第一扫描参数的一个或多个第一扫描参数值。 基于这些设置一个或多个第一扫描参数值，确定包括一个或多个第二扫描参数的第二参数集。 提供第二参数组，并且分配给一个或多个第二扫描参数的一个或多个第二扫描参数值被设置。 基于一个或多个第一扫描参数值和/或一个或多个第二扫描参数值，准备扫描协议。 基于准备的扫描协议，医疗成像装置获取扫描数据。

公开(公告)号：US09506998B2

公开(公告)日：2016-11-29

申请号：US14068202

申请日：2013-10-31

申请人： David Grodzki

发明人： David Grodzki

IPC分类号： G01R33/48 ,  G01R33/561

CPC分类号： G01R33/4816 ,  G01R33/5611 ,  G01R33/5616

摘要： In a method and magnetic resonance apparatus to create two raw data sets from double echo exposures of an imaging area located in a measurement volume of the magnetic resonance system, two echo signals are acquired in the form of raw data sets at different times, and k-space corresponding to the imaging area is either scanned completely only for the first raw data set and incompletely for the second raw data set, or is scanned completely only for the second raw data set and incompletely for the first raw data set. The completion of the incomplete raw data set takes place using a model that is based on the completely scanned raw data set.

摘要翻译： 在一种方法和磁共振装置中，从位于磁共振系统的测量体积中的成像区域的双回波曝光创建两个原始数据集，在不同时间以原始数据集的形式获取两个回波信号，并且k 对应于成像区域的空间对于第一原始数据集完全扫描，或者完全扫描第二原始数据集，或者完全扫描仅针对第二原始​​数据集，并且对于第一原始数据集不完全扫描。 使用基于完全扫描的原始数据集的模型完成不完整的原始数据集。

公开(公告)号：US20160238681A1

公开(公告)日：2016-08-18

申请号：US15043620

申请日：2016-02-14

申请人： Stephan Biber ,  David Grodzki

发明人： Stephan Biber ,  David Grodzki

IPC分类号： G01R33/385 ,  G01R33/561 ,  G01R33/48

CPC分类号： G01R33/3852 ,  G01R33/543

摘要： A magnetic resonance device includes at least one gradient amplifier and at least one gradient coil. The magnetic resonance device also includes a switching matrix unit that is embodied flexibly to connect the at least one gradient amplifier to the at least one gradient coil. A preliminary pulse sequence for the magnetic resonance device provides that in the optimized pulse sequence, a sufficient number of gradient amplifiers is available at any point for operating the gradient coils used.

摘要翻译： 磁共振装置包括至少一个梯度放大器和至少一个梯度线圈。 磁共振装置还包括灵活实现的开关矩阵单元，以将至少一个梯度放大器连接到至少一个梯度线圈。 用于磁共振装置的初步脉冲序列提供了在优化的脉冲序列中，足够数量的梯度放大器可用于任何点用于操作所使用的梯度线圈。

公开(公告)号：US09395429B2

公开(公告)日：2016-07-19

申请号：US14050613

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： G01R33/4828 ,  A61B5/055 ,  G01R33/4816 ,  G01R33/4824 ,  G01R33/5602

摘要： In a method and magnetic resonance apparatus for acquiring image data using a sequence in which k-space corresponding to the imaging area is scanned in a first region of k-space, which does not include the center of k-space, radially along spokes emanating from the center of k-space, with at least two phase coding gradients being completely ramped up before the excitation pulse, and in a second central region of k-space, which remains without the first region, in a Cartesian manner. For contrast increase, a pre-pulse is provided before a predetermined number of individual measurements. A portion of the measurement points of the second region of k-space, which portion is situated nearest the center of k-space, is scanned as central measurement points after the first administration of the pre-pulse immediately following a zero crossing of the contrast-relevant magnetization of one of at least two materials in the image.

摘要翻译： 在一种方法和磁共振装置中，使用在不包括k空间的中心的k空间的第一区域中扫描与成像区域相对应的k空间的序列来获取图像数据，沿径向辐射辐射 从k空间的中心开始，至少两个相位编码梯度在激发脉冲之前完全斜坡，并且在以笛卡尔方式保持没有第一区域的k空间的第二中心区域中。 为了对比度增加，在预定数量的单独测量之前提供预脉冲。 在紧随着对比度零交叉之后的第一次施加预脉冲之后，将k部分位于最靠近k空间中心的k空间的第二区域的一部分测量点作为中心测量点被扫描 图像中的至少两种材料之一的相关磁化强度。