公开(公告)号：US20130076356A1

公开(公告)日：2013-03-28

申请号：US13627273

申请日：2012-09-26

申请人： Vladimir Jellus ,  Lars Lauer ,  Mathias Nittka

发明人： Vladimir Jellus ,  Lars Lauer ,  Mathias Nittka

IPC分类号： G01R33/56 ,  G01R33/38

CPC分类号： A61B5/7217 ,  A61B5/055 ,  G01R33/56563

摘要： In a magnetic resonance method and system to correct spatial shifts in MR data, at least two measurement data sets are acquired, the additional measurement data set or sets being acquired while switching an additional gradient relative to acquisition of the first measurement data set. For respective corresponding measurement points of the measurement data sets, a phase difference is initially determined from the first measurement data set and at least one additional measurement data set acquired with the additional gradient, with a spatial shift of the measurement points of the first measurement data set being determined from the spatial shift. The magnitude values of the initially measured measurement points are distributed to their correct spatial position corresponding to the determined spatial shifts, so a corrected image data set is created.

摘要翻译： 在用于校正MR数据中的空间位移的磁共振方法和系统中，获取至少两个测量数据集，在相对于第一测量数据集的获取切换附加梯度的同时获取附加测量数据集或集合。 对于测量数据组的各个对应的测量点，首先从第一测量数据组和用附加梯度采集的至少一个附加测量数据集确定相位差，并且第一测量数据的测量点的空间位移 从空间位移确定。 将初始测量的测量点的幅度值分配到与确定的空间位移对应的正确的空间位置，从而创建校正的图像数据集。

公开(公告)号：US08917918B2

公开(公告)日：2014-12-23

申请号：US13782256

申请日：2013-03-01

申请人： Vladimir Jellus ,  Mathias Nittka

发明人： Vladimir Jellus ,  Mathias Nittka

IPC分类号： G06K9/00 ,  G01R33/565 ,  A61B5/00 ,  A61B5/055 ,  G01R33/48 ,  G01R33/483

CPC分类号： G01R33/56527 ,  A61B5/00 ,  A61B5/055 ,  A61B5/4872 ,  A61B5/4875 ,  G01R33/4828 ,  G01R33/4835

摘要： In a method processor and magnetic resonance (MR) system to generate MR slice exposures of an examination subject, measurement data for a stack of measurement slices through the examination subject are initially acquired using a series of slice measurement sequences. The series of slice measurement sequences is designed to allow a separation of a first material from a second material that has a defined chemical shift relative to said first material, and the position of a measurement slice with measurement data for the first material is spatially shifted relative to the position of a measurement slice with measurement data for the second material. Combination slice exposures are then formed by combining measurement data of the first material from at least a first slice measurement sequence with measurement data of the second material from at least one second slice measurement sequence, such that the image data of the first and second materials are spatially arranged with precise positioning relative to one another, at least within a predetermined degree of tolerance in the combination slice exposures.

摘要翻译： 在用于产生检查对象的MR切片曝光的方法处理器和磁共振（MR）系统中，首先通过一系列切片测量序列获取通过检查对象的测量切片堆叠的测量数据。 切片测量序列系列被设计成允许第一材料与相对于所述第一材料具有限定的化学位移的第二材料分离，并且具有第一材料的测量数据的测量切片的位置相对于空间偏移 到具有第二材料的测量数据的测量切片的位置。 然后通过将来自至少第一切片测量序列的第一材料的测量数据与来自至少一个第二切片测量序列的第二材料的测量数据组合，使得第一和第二材料的图像数据为 空间上布置成相对于彼此具有精确定位，至少在组合切片曝光中的预定公差范围内。

公开(公告)号：US20130230223A1

公开(公告)日：2013-09-05

申请号：US13782256

申请日：2013-03-01

申请人： Vladimir Jellus ,  Mathias Nittka

发明人： Vladimir Jellus ,  Mathias Nittka

IPC分类号： G01R33/565 ,  A61B5/00

CPC分类号： G01R33/56527 ,  A61B5/00 ,  A61B5/055 ,  A61B5/4872 ,  A61B5/4875 ,  G01R33/4828 ,  G01R33/4835

摘要： In a method processor and magnetic resonance (MR) system to generate MR slice exposures of an examination subject, measurement data for a stack of measurement slices through the examination subject are initially acquired using a series of slice measurement sequences. The series of slice measurement sequences is designed to allow a separation of a first material from a second material that has a defined chemical shift relative to said first material, and the position of a measurement slice with measurement data for the first material is spatially shifted relative to the position of a measurement slice with measurement data for the second material. Combination slice exposures are then formed by combining measurement data of the first material from at least a first slice measurement sequence with measurement data of the second material from at least one second slice measurement sequence, such that the image data of the first and second materials are spatially arranged with precise positioning relative to one another, at least within a predetermined degree of tolerance in the combination slice exposures.

摘要翻译： 在用于产生检查对象的MR切片曝光的方法处理器和磁共振（MR）系统中，首先通过一系列切片测量序列获取通过检查对象的测量切片堆叠的测量数据。 切片测量序列系列被设计成允许第一材料与相对于所述第一材料具有限定的化学位移的第二材料分离，并且具有第一材料的测量数据的测量切片的位置相对于空间偏移 到具有第二材料的测量数据的测量切片的位置。 然后通过将来自至少第一切片测量序列的第一材料的测量数据与来自至少一个第二切片测量序列的第二材料的测量数据组合，使得第一和第二材料的图像数据为 空间上布置成相对于彼此具有精确定位，至少在组合切片曝光中的预定公差范围内。

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：US20130200893A1

公开(公告)日：2013-08-08

申请号：US13757446

申请日：2013-02-01

申请人： Björn Heismann ,  Mathias Nittka ,  Peter Speier ,  Aurélien Stalder

发明人： Björn Heismann ,  Mathias Nittka ,  Peter Speier ,  Aurélien Stalder

IPC分类号： G01R33/54 ,  G01R33/38

CPC分类号： G01R33/543 ,  G01R33/38 ,  G01R33/3854 ,  G01R33/56518

摘要： A method and a measuring-sequence-determining device for determining a measuring sequence for a magnetic resonance system based on at least one intra-repetition-interval time parameter are provided. During the determination of the measuring sequence in a gradient-optimization method, gradient-pulse parameters of the measuring sequence are automatically optimized to reduce at least one gradient-pulse-parameter maximum value. As a boundary condition in the gradient-optimization method, the intra-repetition-interval time parameter is kept constant at least within a specified tolerance value.

摘要翻译： 提供了一种用于基于至少一个重复间隔时间参数确定磁共振系统的测量序列的方法和测量序列确定装置。 在梯度优化方法中确定测量序列期间，自动优化测量序列的梯度脉冲参数以减少至少一个梯度脉冲参数最大值。 作为梯度优化方法中的边界条件，重复间隔时间参数至少保持在规定的公差值以内。

公开(公告)号：US20120139539A1

公开(公告)日：2012-06-07

申请号：US13308723

申请日：2011-12-01

申请人： Mathias Nittka

发明人： Mathias Nittka

IPC分类号： G01R33/54 ,  G01R33/34

CPC分类号： G01R33/56563 ,  G01R33/5602 ,  G01R33/5607 ,  G01R33/56536 ,  G01R33/56572

摘要： In a method for generating a pulse sequence for operating a magnetic resonance (MR) system for acquiring data from an examination subject having an interfering object in the patient's body, the bandwidths of at least two of the RF (radio-frequency) pulses in the pulse sequence are matched such that the matched RF pulses respectively excite a congruent slice when they are radiated into an examination subject under the effect of a slice selection gradient of identical amplitude. The matching of the RF pulses in the manner ensures so that the respective slices excited by the at least two RF pulses are subject to the same nonlinearities and inhomogeneities, and therefore the same spatial distortions, and so that signal losses due to inconsistent excitations of the two pulses are avoided. The image data that can be acquired with the pulse sequence are therefore optimized.

摘要翻译： 在用于产生用于操作用于从患者身体中具有干扰对象的检查对象获取数据的磁共振（MR）系统的脉冲序列的方法中，所述脉冲序列中的至少两个RF（射频）脉冲的带宽 脉冲序列匹配，使得匹配的RF脉冲在相同幅度的切片选择梯度的影响下分别激发全等切片，当它们被辐射到检查对象中时。 以这种方式匹配RF脉冲确保使得由至少两个RF脉冲激发的各个片段遭受相同的非线性和不均匀性，并且因此遭受相同的空间失真，并且使得由于不稳定的激发引起的信号损失 避免了两个脉冲。 因此可以用脉冲序列获取的图像数据被优化。

公开(公告)号：US09645216B2

公开(公告)日：2017-05-09

申请号：US13757446

申请日：2013-02-01

申请人： Björn Heismann ,  Mathias Nittka ,  Peter Speier ,  Aurélien Stalder

发明人： Björn Heismann ,  Mathias Nittka ,  Peter Speier ,  Aurélien Stalder

IPC分类号： G01V3/00 ,  G01R33/54 ,  G01R33/38 ,  G01R33/385 ,  G01R33/565

CPC分类号： G01R33/543 ,  G01R33/38 ,  G01R33/3854 ,  G01R33/56518

摘要： A method and a measuring-sequence-determining device for determining a measuring sequence for a magnetic resonance system based on at least one intra-repetition-interval time parameter are provided. During the determination of the measuring sequence in a gradient-optimization method, gradient-pulse parameters of the measuring sequence are automatically optimized to reduce at least one gradient-pulse-parameter maximum value. As a boundary condition in the gradient-optimization method, the intra-repetition-interval time parameter is kept constant at least within a specified tolerance value.

公开(公告)号：US20160266222A1

公开(公告)日：2016-09-15

申请号：US15068552

申请日：2016-03-12

申请人： Mathias Nittka

发明人： Mathias Nittka

IPC分类号： G01R33/48 ,  G01R33/565 ,  G01R33/561

CPC分类号： G01R33/56536 ,  G01R33/543 ,  G01R33/5611

摘要： Generation of a preview image using magnetic resonance signals is provided. A method for the generation of a preview image using magnetic resonance signals includes acquiring a first part and a second part of magnetic resonance signals. During the acquisition of the first part of the magnetic resonance signals, a first k-space is regularly sampled, while, during the acquisition of the second part of the magnetic resonance signals, a second k-space is sampled in a pseudorandomized manner. The first part of the magnetic resonance signals is used to generate a preview image. The second part or the second part and a subset of the first part of the magnetic resonance signals are stored for the generation of a second image.

摘要翻译： 提供使用磁共振信号生成预览图像。 使用磁共振信号生成预览图像的方法包括获取磁共振信号的第一部分和第二部分。 在获取磁共振信号的第一部分期间，规则地采样第一k空间，而在获取第二部分磁共振信号期间，以伪随机方式对第二k空间进行采样。 磁共振信号的第一部分用于产生预览图像。 存储第二部分或第二部分以及磁共振信号的第一部分的子集，用于产生第二图像。

公开(公告)号：US20110043204A1

公开(公告)日：2011-02-24

申请号：US12859461

申请日：2010-08-19

申请人： Wolfgang Bielmeier ,  Gerhard Brinker ,  Swen Campagna ,  Thorsten Feiweier ,  Bernd Kuehn ,  Mathias Nittka ,  Carsten Prinz ,  Thorsten Speckner

发明人： Wolfgang Bielmeier ,  Gerhard Brinker ,  Swen Campagna ,  Thorsten Feiweier ,  Bernd Kuehn ,  Mathias Nittka ,  Carsten Prinz ,  Thorsten Speckner

IPC分类号： G01R33/44

CPC分类号： G01R33/546 ,  G01R33/543

摘要： In a magnetic resonance system according to a measurement protocol defined in advance and comprising multiple acquisition parameters, wherein given a non-compliance with at least one limit value (which is automatically established before the beginning of a subject-specific measurement data acquisition)—in particular a SAR limit value and/or a magneto-stimulation limit value and/or a hardware limit value—by the measurement protocol, an adaptation of at least one acquisition parameter ensues using at least one (in particular user-defined) protocol-specific rule for compliance with the limit value, and the measurement data acquisition ensues automatically according to the adapted acquisition parameters.

摘要翻译： 在根据预先定义并包括多个采集参数的测量协议的磁共振系统中，其中给定不符合至少一个限制值（其在对象特异性测量数据获取开始之前自动建立） - 在 特别是SAR限制值和/或磁刺激极限值和/或硬件限制值 - 通过测量协议，使用至少一个（特别是用户定义的）协议特定的随机序列来调整至少一个采集参数 根据适应的采集参数自动进行测量数据采集。

公开(公告)号：US11047945B2

公开(公告)日：2021-06-29

申请号：US15068552

申请日：2016-03-12

申请人： Mathias Nittka

发明人： Mathias Nittka

IPC分类号： G01R33/48 ,  G01R33/565 ,  G01R33/561 ,  G01R33/54

摘要： Generation of a preview image using magnetic resonance signals is provided. A method for the generation of a preview image using magnetic resonance signals includes acquiring a first part and a second part of magnetic resonance signals. During the acquisition of the first part of the magnetic resonance signals, a first k-space is regularly sampled, while, during the acquisition of the second part of the magnetic resonance signals, a second k-space is sampled in a pseudorandomized manner. The first part of the magnetic resonance signals is used to generate a preview image. The second part or the second part and a subset of the first part of the magnetic resonance signals are stored for the generation of a second image.