公开(公告)号：US09696394B2

公开(公告)日：2017-07-04

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： G01R33/36

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.

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。

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。

公开(公告)号：US20130307538A1

公开(公告)日：2013-11-21

申请号：US13898667

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 system to correct phase errors in multidimensional, spatially selective radio-frequency excitation pulses in a pulse sequence used to operate the system to acquire magnetic resonance data, a multidimensional, spatially selective radio-frequency excitation pulse is radiated and multiple calibration gradient echoes are acquired. A phase correction and a time correction of the multidimensional, spatially selective radio-frequency excitation pulse is then calculated.

摘要翻译： 在用于操作系统以获取磁共振数据的脉冲序列中的多维空间选择性射频激励脉冲中校正相位误差的方法和磁共振系统中，多维空间选择性射频激励脉冲被辐射并且多个 获得校准梯度回波。 然后计算多维空间选择性射频激励脉冲的相位校正和时间校正。

公开(公告)号：US09753108B2

公开(公告)日：2017-09-05

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： G01V3/00 ,  G01R33/44 ,  G01R33/34 ,  G01R33/385 ,  G01R33/387 ,  G01R33/56 ,  G01R33/561 ,  G01R33/565

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.

公开(公告)号：US09329254B2

公开(公告)日：2016-05-03

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 ,  G01R33/565 ,  G01R33/561 ,  G01R33/567

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。

公开(公告)号：US20130253876A1

公开(公告)日：2013-09-26

申请号：US13847373

申请日：2013-03-19

申请人： Josef Pfeuffer ,  Rainer Schneider

发明人： Josef Pfeuffer ,  Rainer Schneider

IPC分类号： G01R33/44 ,  G01R33/38

CPC分类号： G01R33/443 ,  G01R33/38 ,  G01R33/4833 ,  G01R33/4836 ,  G01R33/5612 ,  G01R33/56563

摘要： A method and a control sequence determination device for the determination of a magnetic resonance system activation sequence including at least one high-frequency pulse sequence to be transmitted by a magnetic resonance system are provided. A current B0 map and optionally a target magnetization are acquired. In addition, a k-space trajectory type is determined. An error density is calculated in a k-space based on the current B0 map and optionally based on the target magnetization using an analytic function. This analytic function defines an error density in the k-space as a function of the current B0 map and optionally the target magnetization. Taking account of the error density in the k-space, a k-space trajectory of the specified k-space trajectory type is determined. The high-frequency pulse sequence is determined for the k-space trajectory in an HF pulse optimization process.

摘要翻译： 提供一种用于确定包括要由磁共振系统传送的至少一个高频脉冲序列的磁共振系统激活序列的方法和控制序列确定装置。 获取当前的B0图和可选的目标磁化。 另外，确定k空间轨迹类型。 基于当前B0图在k空间中计算误差密度，并且可选地基于使用分析函数的目标磁化。 该分析函数定义了k空间中的误差密度，作为当前B0映射和可选的目标磁化的函数。 考虑到k空间中的误差密度，确定了指定的k空间轨迹类型的k空间轨迹。 在HF脉冲优化过程中为k空间轨迹确定高频脉冲序列。

公开(公告)号：US08436610B2

公开(公告)日：2013-05-07

申请号：US12604273

申请日：2009-10-22

申请人： Josef Pfeuffer

发明人： Josef Pfeuffer

IPC分类号： G01R33/56366 ,  G01R33/563 ,  G01R33/5601 ,  G01R33/5635 ,  A61B5/055

CPC分类号： G01R33/56366 ,  G01R33/4833 ,  G01R33/4835 ,  G01R33/5601

摘要： A system adaptively processes MR image data to accommodate variation in perfusion time of a vessel fluid. An MR image data acquisition device initiates acquisition of a first image set comprising multiple different individual images having a set of corresponding different physical slice locations through a patient anatomical volume and being acquired at a corresponding first set of times and in a first order relative to a time of blood tagging of a patient. The MR image data acquisition device initiates acquisition of a second image set comprising multiple different individual images having the set of corresponding different physical slice locations through the patient anatomical volume and being acquired at substantially the corresponding first set of times and in a second order, different to the first order, relative to the time of blood tagging of the patient. At least one computer combines and averages image data representing the same corresponding image slice in both the first and second image sets and acquired at different times relative to the time of blood tagging of the patient and sends the combined and averaged image data representing the same corresponding image slice to a destination.

摘要翻译： 系统自适应地处理MR图像数据以适应血管流体的灌注时间的变化。 MR图像数据获取装置通过患者解剖体积开始获取包括具有一组对应的不同物理切片位置的多个不同单独图像的第一图像集，并且以对应的第一组和第一组相对于 血液标签的时间。 MR图像数据获取装置启动通过患者解剖体积开始包括具有对应不同物理切片位置的集合的多个不同单独图像的第二图像集，并且基本上在相应的第一组和第二阶段获取不同的 相对于患者的血液标记时间的第一顺序。 至少一台计算机在第一和第二图像集合中组合并平均表示相同对应图像切片的图像数据，并且相对于患者的血液标记时间在不同时间获取，并发送表示相同对应的组合和平均的图像数据 图像切片到目的地。

公开(公告)号：US08354843B2

公开(公告)日：2013-01-15

申请号：US12559753

申请日：2009-09-15

申请人： Stefan Huwer ,  Josef Pfeuffer

发明人： Stefan Huwer ,  Josef Pfeuffer

IPC分类号： G01V3/00

CPC分类号： G01R33/561 ,  G01R33/4833 ,  G01R33/485 ,  G01R33/5611

摘要： In a method and system to generate magnetic resonance (MR) images by MR data are acquired by a pure phase-coded imaging in k-space having a predetermined set of possible measurement points, with the MR data being acquired only for a predetermined subset of the measurement points of this set. An image is reconstructed from the acquired measurement points of the subset such that information about un-acquired measurement points of the set is also obtained.

摘要翻译： 在通过MR数据产生磁共振（MR）图像的方法和系统中，通过具有预定的可能测量点组的k空间中的纯相位编码成像来获取MR数据，其中MR数据仅被获取 该组的测量点。 从所述子集的所获取的测量点重建图像，使得还获得关于所述集合的未获取的测量点的信息。

公开(公告)号：US08195417B2

公开(公告)日：2012-06-05

申请号：US12219610

申请日：2008-07-24

申请人： Thorsten Feiweier ,  Ralf Ladebeck ,  Diana Martin ,  Hartwig Newiger ,  Josef Pfeuffer ,  Michael Szimtenings ,  Harald Werthner

发明人： Thorsten Feiweier ,  Ralf Ladebeck ,  Diana Martin ,  Hartwig Newiger ,  Josef Pfeuffer ,  Michael Szimtenings ,  Harald Werthner

IPC分类号： G01R35/00

CPC分类号： A61B6/032 ,  A61B5/11 ,  A61B5/7285 ,  A61B6/037 ,  A61B6/5247 ,  A61B6/541 ,  A61B8/00 ,  A61B8/4416 ,  A61B90/36 ,  A61B2090/364 ,  G06F19/00

摘要： Disclosed is a method and apparatus for recording measured data from a patient by taking movements into account by use of a medical device designed both for recording motion-related measured data and for recording nuclear medicine measured data. The method may include recording nuclear medicine measured data by use of the medical device, simultaneously recording motion-related measured data by use of the medical device, determining at least one motion information item relating to at least one movement of the patient and/or at least one movement inside the body of the patient during the ongoing measured data recording by evaluating at least a portion of the previously recorded motion-related measured data, and carrying out motion correction for at least a portion of the nuclear medicine measured data by use of the computational device in parallel with recording the measured data.

摘要翻译： 公开了一种通过使用设计用于记录运动相关测量数据和记录核医学测量数据的医疗装置来考虑运动来记录来自患者的测量数据的方法和装置。 该方法可以包括通过使用医疗装置记录核医学测量数据，同时通过使用医疗装置记录与运动有关的测量数据，确定与患者的至少一个运动有关的至少一个运动信息项和/或在 通过评估先前记录的运动相关测量数据的至少一部分，以及通过使用以下方式对至少一部分核医学测量数据执行运动校正，在进行中的测量数据记录期间在患者体内进行至少一次运动 计算设备并行记录测量数据。