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11. 发明申请

US20130249550A1 METHOD AND MAGNETIC RESONANCE SYSTEM TO ACQUIRE MR DATA IN A PREDETERMINED VOLUME SEGMENT OF AN EXAMINATION SUBJECT 有权
标题翻译：方法和磁共振系统，用于在考察科目的预测量部分中获取MR数据
公开(公告)号：US20130249550A1
公开(公告)日：2013-09-26
申请号：US13848965
申请日：2013-03-22
申请人： Thorsten Feiweier , Christof Krellmann , Bernd Kuehn , Dominik Paul , Josef Pfeuffer , Elisabeth Preusche , Katrin Wohlfarth
发明人： Thorsten Feiweier , Christof Krellmann , Bernd Kuehn , Dominik Paul , Josef Pfeuffer , Elisabeth Preusche , Katrin Wohlfarth
IPC分类号： G01R33/563
CPC分类号： G01R33/563 , G01R33/4833 , G01R33/4838 , G01R33/56527
摘要： In a method and a magnetic resonance (MR) system, a marked area is determined that demarcates a predetermined volume segment of the subject relative to the regions adjacent thereto. Nuclei in the predetermined volume segment are excited, or nuclei in a region adjacent thereto are saturated with an RF excitation pulse at the same time a magnetic field gradient is activated. The center frequency of a frequency range of the RF excitation pulse and the direction of the magnetic field gradient are adjusted dependent on resonant frequencies of substances present within the predetermined volume segment in order, starting from the predetermined volume segment to shift an actual excitation volume segment excited by the RF excitation pulse toward the marked area, or to shift a saturation volume saturated by the RF excitation pulse away from the marked area. MR data are then acquired from the predetermined volume segment.
摘要翻译：在方法和磁共振（MR）系统中，确定标记的区域，其相对于与其相邻的区域划定对象的预定体积段。在预定体积段中的核被激发，或者与其相邻的区域中的核被RF激励脉冲饱和，同时磁场梯度被激活。 RF激励脉冲的频率范围和磁场梯度的方向的中心频率根据预定体积段中存在的物质的谐振频率依次调整，从预定的音量段开始，以使实际的励磁音量段通过RF激发脉冲激发到标记区域，或者使由RF激发脉冲饱和的饱和体积偏离标记区域。然后从预定的音量段获取MR数据。

12. 发明申请

US20120249138A1 MAGNETIC RESONANCE METHOD AND SYSTEM TO CORRECT PHASE INFORMATION IN MR IMAGES 有权
标题翻译：磁共振方法和系统，用于校正MR图像中的相位信息
公开(公告)号：US20120249138A1
公开(公告)日：2012-10-04
申请号：US13422271
申请日：2012-03-16
申请人： Josef Pfeuffer
发明人： Josef Pfeuffer
IPC分类号： G01R33/48
CPC分类号： G01R33/56563 , G01R33/5616 , G01R33/56509 , G01R33/5676
摘要： In a magnetic resonance (MR) method and system for correction of phase information in MR images of a predetermined volume segment of an examination subject, a basic magnetic field is applied and MR data of the predetermined volume segment are acquired and evaluated such that phase information is calculated for each image element of the predetermined volume segment. A navigator signal is acquired that detects an unintentional change of the basic magnetic field that is caused by movements of the examination subject or by the magnetic resonance system itself. The phase information is corrected with this navigator signal.
摘要翻译：在用于校正检查对象的预定体积段的MR图像中的相位信息的磁共振（MR）方法和系统中，施加基本磁场并获取和评估预定体积段的MR数据，使得相位信息对于预定体积段的每个图像元素计算。获取导航信号，其检测由检查对象的运动或磁共振系统本身引起的基本磁场的无意的变化。相位信息用该导航信号进行校正。

13. 发明授权

US08203340B2 Magnetic resonance method and apparatus for generating a perfusion image 有权
标题翻译：用于产生灌注图像的磁共振方法和装置
公开(公告)号：US08203340B2
公开(公告)日：2012-06-19
申请号：US12189241
申请日：2008-08-11
申请人： Josef Pfeuffer
发明人： Josef Pfeuffer
IPC分类号： G01V3/00
CPC分类号： G01R33/56366 , A61B5/055 , G01R33/4833 , G01R33/56333 , G01R33/5635 , G01R33/56509 , G06T5/50 , G06T7/0002 , G06T7/13 , G06T2207/10088 , G06T2207/30168
摘要： In a magnetic resonance method and apparatus for generating perfusion images, a perfusion series of magnetic resonance perfusion images is acquired that includes tag images and at least one control image, that are grouped in pairs. From each pair an initially processed perfusion image is obtained, such as by subtraction. Each initially processed image is subjected to a quality control review by analysis with respect to at least one image quality criterion. Any initially processed image that does not satisfy the quality criterion is rejected. Only initially processed images that satisfy the quality criterion are combined to form a resultant magnetic resonance perfusion image. Artifacts in the resultant perfusion image are thereby reduced or avoided.
摘要翻译：在用于产生灌注图像的磁共振方法和装置中，获取灌注系列的磁共振灌注图像，其包括成对分组的标签图像和至少一个控制图像。从每对中获得初始处理的灌注图像，例如通过减法获得。通过关于至少一个图像质量标准的分析对每个初始处理的图像进行质量控制审查。任何不符合质量标准的初始处理图像都被拒绝。仅组合满足质量标准的最初处理的图像，以形成合成的磁共振灌注图像。从而减少或避免了所得灌注图像中的人造物。

14. 发明授权

US09274195B2 Determination of a magnetic resonance system control sequence 有权
标题翻译：确定磁共振系统控制序列
公开(公告)号：US09274195B2
公开(公告)日：2016-03-01
申请号：US13847680
申请日：2013-03-20
申请人： Josef Pfeuffer , Rainer Schneider
发明人： Josef Pfeuffer , Rainer Schneider
IPC分类号： G01V3/00 , G01R33/54 , G01R33/28 , G01R33/483 , G01R33/561
CPC分类号： G01R33/543 , G01R33/28 , G01R33/4833 , G01R33/4836 , G01R33/5612
摘要： In method and a control sequence determination device to determine a magnetic resonance system control sequence that includes at least one radio-frequency pulse train to be emitted by a magnetic resonance system, a target magnetization (m) is initially detected, and an energy distribution function in k-space is determined on the basis of the target magnetization. A k-space trajectory is then determined under consideration of the energy distribution function in k-space, for which the radio-frequency pulse train is then determined in an RF pulse optimization method. The method is suitable for operation of a magnetic resonance system, and a magnetic resonance system includes such a control sequence determination device.
摘要翻译：在方法和控制序列确定装置中，确定包括由磁共振系统发射的至少一个射频脉冲串的磁共振系统控制序列，最初检测目标磁化（m），并且能量分布函数基于目标磁化确定k空间。然后考虑k空间中的能量分布函数来确定k空间轨迹，然后在RF脉冲优化方法中确定射频脉冲序列。该方法适用于磁共振系统的操作，并且磁共振系统包括这样的控制顺序确定装置。

15. 发明申请

US20150285877A1 Magnetic resonance imaging method for at least two separate radio-frequency transmit coils with time-delayed slice-selective excitation pulses 有权
标题翻译：用于具有时间延迟的切片选择性激发脉冲的至少两个分离的射频发射线圈的磁共振成像方法
公开(公告)号：US20150285877A1
公开(公告)日：2015-10-08
申请号：US14678484
申请日：2015-04-03
申请人： Josef Pfeuffer , Rainer Schneider
发明人： Josef Pfeuffer , Rainer Schneider
IPC分类号： G01R33/44 , G01R33/385 , G01R33/561 , G01R33/565 , G01R33/56 , G01R33/34 , G01R33/387
CPC分类号： G01R33/443 , G01R33/34092 , G01R33/385 , G01R33/387 , G01R33/5608 , G01R33/5613 , G01R33/5616 , G01R33/56536 , G01R33/56563 , G01R33/5659
摘要： A method for creating an image data set using a magnetic resonance system including at least two RF transmit coils includes, for each RF transmit coil, calculating a value for a susceptibility magnetic field gradient to be corrected from the Gs map in combination with the B1 map of the RF transmit coil. The method includes, for each RF transmit coil, calculating a time delay of the excitation pulse. The method also includes calculating a complex weighting factor for scaling the pulse profile for each RF transmit coil to achieve an as uniform as possible deflection of the magnetization by the excitation pulse over the area under examination, and passing through the imaging sequence. The RF transmit coils each emit an excitation pulse with the calculated time delay and with a pulse profile scaled according to the calculated complex weighting factors.
摘要翻译：用于使用包括至少两个RF发射线圈的磁共振系统创建图像数据集的方法包括：对于每个RF发射线圈，从与G图相结合的B1映射计算要校正的磁敏度磁场梯度的值的RF发射线圈。对于每个RF发射线圈，该方法包括计算激励脉冲的时间延迟。该方法还包括计算用于缩放每个RF发射线圈的脉冲分布的复合加权因子，以实现通过激励脉冲在被检测区域上的可能的磁化偏移的均匀并通过成像序列。 RF发射线圈各自发射具有计算的时间延迟的激励脉冲，并且根据计算的复加权因子对脉冲分布进行缩放。

16. 发明申请

US20130249549A1 DETERMINATION OF A MAGNETIC RESONANCE SYSTEM CONTROL SEQUENCE 有权
标题翻译：磁共振系统控制序列的确定
公开(公告)号：US20130249549A1
公开(公告)日：2013-09-26
申请号：US13847680
申请日：2013-03-20
申请人： Josef Pfeuffer , Rainer Schneider
发明人： Josef Pfeuffer , Rainer Schneider
IPC分类号： G01R33/54 , G01R33/28
CPC分类号： G01R33/543 , G01R33/28 , G01R33/4833 , G01R33/4836 , G01R33/5612
摘要： In method and a control sequence determination device to determine a magnetic resonance system control sequence that includes at least one radio-frequency pulse train to be emitted by a magnetic resonance system, a target magnetization (m) is initially detected, and an energy distribution function in k-space is determined on the basis of the target magnetization. A k-space trajectory is then determined under consideration of the energy distribution function in k-space, for which the radio-frequency pulse train is then determined in an RF pulse optimization method. The method is suitable for operation of a magnetic resonance system, and a magnetic resonance system includes such a control sequence determination device.
摘要翻译：在方法和控制序列确定装置中，确定包括由磁共振系统发射的至少一个射频脉冲串的磁共振系统控制序列，最初检测目标磁化（m），并且能量分布函数基于目标磁化确定k空间。然后考虑k空间中的能量分布函数来确定k空间轨迹，然后在RF脉冲优化方法中确定射频脉冲序列。该方法适用于磁共振系统的操作，并且磁共振系统包括这样的控制顺序确定装置。

17. 发明申请

US20130038329A1 MAGNETIC RESONANCE SYSTEM HAVING VARIABLE FREQUENCY TRANSMIT PULSES 有权
标题翻译：具有可变频率发射脉冲的磁共振系统
公开(公告)号：US20130038329A1
公开(公告)日：2013-02-14
申请号：US13569034
申请日：2012-08-07
申请人： Matthias Gebhardt , Josef Pfeuffer , Thorsten Speckner
发明人： Matthias Gebhardt , Josef Pfeuffer , Thorsten Speckner
IPC分类号： G01R33/32
CPC分类号： G01R33/3607
摘要： A controller of a magnetic resonance system outputs a low frequency base signal to a conversion device. While outputting the base signal to the conversion device, the controller outputs an oscillator control signal to an oscillator. The oscillator outputs a frequency signal corresponding to the oscillator control signal to the conversion device. The conversion device converts the frequency signal into a high frequency transmit pulse with the aid of the base signal and outputs the transmit pulse to a magnetic resonance transmit antenna. The magnetic resonance transmit antenna applies a high frequency field corresponding to a transmit pulse to an examination volume of the magnetic resonance system. The controller varies the oscillator control signal output to the oscillator while outputting the base signal to the modulator. The transmit pulse) has a larger bandwidth than the base signal.
摘要翻译：磁共振系统的控制器向转换装置输出低频基准信号。在将基本信号输出到转换装置的同时，控制器向振荡器输出振荡器控制信号。振荡器将与振荡器控制信号对应的频率信号输出到转换装置。转换装置借助于基本信号将频率信号转换成高频发射脉冲，并将发射脉冲输出到磁共振发射天线。磁共振发射天线将对应于发射脉冲的高频场施加到磁共振系统的检查体积。控制器将输出到振荡器的振荡器控制信号改变，同时将基本信号输出到调制器。发送脉冲）具有比基本信号更大的带宽。

18. 发明授权

US08233961B2 Magnetic resonance device and method for perfusion determination 有权
标题翻译：磁共振装置及灌注测定方法
公开(公告)号：US08233961B2
公开(公告)日：2012-07-31
申请号：US12143265
申请日：2008-06-20
申请人： Heiko Meyer , Josef Pfeuffer
发明人： Heiko Meyer , Josef Pfeuffer
IPC分类号： A61B5/055 , G01V3/00
CPC分类号： G01R33/56341 , A61B5/0263 , A61B5/055 , G01R33/4806 , G01R33/56366
摘要： In a method and a device for automatic determination of perfusion by using a magnetic resonance system, multiple first MR data sets are thereby acquired from a volume element over time with a perfusion-sensitive imaging sequence, and multiple second MR data sets of the same volume element are acquired over time with a control imaging sequence, in particular a perfusion-insensitive imaging sequence. These first MR data sets and the second MR data sets are subjected to a statistical time series analysis in order to determine the perfusion in the volume element.
摘要翻译：在通过使用磁共振系统自动确定灌注的方法和装置中，随后随着灌注敏感成像序列随时间地从体积元素获得多个第一MR数据集，以及相同体积的多个第二MR数据集随着时间的推移，通过控制成像序列，特别是灌注不敏感的成像序列获得元件。对这些第一MR数据集和第二MR数据集进行统计时间序列分析，以确定体积元素中的灌注。

19. 发明申请

US20090195247A1 METHOD AND APPARATUS FOR DYNAMIC DISTORTION CORRECTION IN EPI MEASUREMENTS IN MEDICAL MAGNETIC RESONANCE IMAGING 有权
标题翻译：医学磁共振成像中EPI测量中动态失真校正的方法与装置
公开(公告)号：US20090195247A1
公开(公告)日：2009-08-06
申请号：US12362574
申请日：2009-01-30
申请人： Josef Pfeuffer , Markus Vogler
发明人： Josef Pfeuffer , Markus Vogler
IPC分类号： G01V3/14
CPC分类号： G01R33/5616 , G01R33/56509 , G01R33/56536 , G01R33/56554 , G01R33/5676
摘要： In a magnetic resonance tomography method and apparatus (MRT), as employed in medicine for examination of patients, for dynamic distortion correction in EPI measurements, image acquisitions are acquired that are adjacent in a periodic/alternating manner differ with regard to phase information, phase coding direction or with regard to the echo time, and based on this difference a field map and/or a displacement map is calculated with which at least one distorted result image is corrected.
摘要翻译：在用于检查患者的药物中使用的磁共振断层摄影方法和装置（MRT）中，对于EPI测量中的动态失真校正，获取以周期/交替方式相邻的相位信息相位信息，相位编码方向或关于回波时间，并且基于该差异，计算校正至少一个失真的结果图像的场图和/或位移图。

20. 发明申请

US20130307539A1 MAGNETIC RESONANCE SYSTEM AND METHOD TO CONTINUOUSLY CORRECT PHASE ERRORS OF A MAGNETIC RESONANCE MEASUREMENT SEQUENCE 有权
标题翻译：磁共振测量系统和连续校正磁共振测量序列相位误差的方法
公开(公告)号：US20130307539A1
公开(公告)日：2013-11-21
申请号：US13898701
申请日：2013-05-21
申请人： Josef Pfeuffer , Thorsten Speckner
发明人： Josef Pfeuffer , Thorsten Speckner
IPC分类号： G01R33/58
CPC分类号： G01R33/583 , G01R33/4836 , G01R33/56509 , G01R33/56572 , G01R33/5659
摘要： In a method and magnetic resonance apparatus to continuously correct phase errors in a magnetic resonance measurement sequence in which multiple sequentially radiated, multidimensional, spatially-selective radio-frequency excitation pulses are used, multiple calibration gradient echoes are acquired in a calibration acquisition sequence and a correction value for a phase response and a correction value for a phase difference are calculated from the multiple calibration gradient echoes. Furthermore, an additional radio-frequency excitation pulse is radiated takes into account the correction values.
摘要翻译：在使用多个顺序辐射，多维，空间选择性射频激励脉冲的磁共振测量序列中连续校正相位误差的方法和磁共振装置中，在校准获取序列中获取多个校准梯度回波，从多个校准梯度回波计算相位响应的校正值和相位差的校正值。此外，辐射附加的射频激励脉冲考虑校正值。

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