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    • 32. 发明授权
    • Method to determine a predetermined signal amplitude in MR measurements
    • 确定MR测量中预定信号幅度的方法
    • US08427157B2
    • 2013-04-23
    • US12635165
    • 2009-12-10
    • Hans-Peter FautzFranz Schmitt
    • Hans-Peter FautzFranz Schmitt
    • G01V3/00A61B5/055
    • G01R33/583G01R33/246G01R33/543
    • In a method and apparatus to determine a predetermined signal amplitude of an examination subject in an MR measurement in which multiple RF pulses are radiated into the examination subject in a pulse sequence in a pulse series with a repetition time TR that is smaller than the T2 times of the examination subject, a target magnetization is established for a predetermined point in time after radiation of the respective RF pulse for essentially all RF pulses from the pulse series, a target flip angle and a target phase are determined for different regions of the examination subject for essentially all RF pulses depending on the respective target magnetization, a respective amplitude and phase response is determined for essentially all RF pulses to generate the respective target magnetization after radiation of the respective RF pulse, and the RF pulses with the respective determined amplitude and phase response are radiated into the examination subject.
    • 在MR测量中确定检查对象的预定信号幅度的方法和装置中,其中多个RF脉冲以脉冲序列以脉冲序列辐射到检查对象中,其中重复时间TR小于T2次 对于检查对象的不同区域,针对基本上所有来自脉冲序列的所有RF脉冲的辐射之后的预定时间点建立目标磁化,针对检查对象的不同区域确定目标翻转角和目标相位 对于基本上所有的RF脉冲取决于相应的目标磁化,对于基本上所有的RF脉冲确定相应的幅度和相位响应,以在相应RF脉冲的辐射之后产生相应的目标磁化,并且具有相应确定的幅度和相位的RF脉冲 回应被辐射到考试科目。
    • 34. 发明申请
    • METHOD TO DETERMINE A PREDETERMINED SIGNAL AMPLITUDE IN MR MEASUREMENTS
    • 确定MR测量中预测信号振幅的方法
    • US20100141252A1
    • 2010-06-10
    • US12635165
    • 2009-12-10
    • Hans-Peter FautzFranz Schmitt
    • Hans-Peter FautzFranz Schmitt
    • G01R33/44
    • G01R33/583G01R33/246G01R33/543
    • In a method and apparatus to determine a predetermined signal amplitude of an examination subject in an MR measurement in which multiple RF pulses are radiated into the examination subject in a pulse sequence in a pulse series with a repetition time TR that is smaller than the T2 times of the examination subject, a target magnetization is established for a predetermined point in time after radiation of the respective RF pulse for essentially all RF pulses from the pulse series, a target flip angle and a target phase are determined for different regions of the examination subject for essentially all RF pulses depending on the respective target magnetization, a respective amplitude and phase response is determined for essentially all RF pulses to generate the respective target magnetization after radiation of the respective RF pulse, and the RF pulses with the respective determined amplitude and phase response are radiated into the examination subject.
    • 在MR测量中确定检查对象的预定信号幅度的方法和装置中,其中多个RF脉冲以脉冲序列以脉冲序列辐射到检查对象中,其中重复时间TR小于T2次 对于检查对象的不同区域,针对基本上所有来自脉冲序列的所有RF脉冲的辐射之后的预定时间点建立目标磁化,针对检查对象的不同区域确定目标翻转角和目标相位 对于基本上所有的RF脉冲取决于相应的目标磁化,对于基本上所有的RF脉冲确定相应的幅度和相位响应,以在相应RF脉冲的辐射之后产生相应的目标磁化,并且具有相应确定的幅度和相位的RF脉冲 回应被辐射到考试科目。
    • 38. 发明授权
    • MR tomography apparatus and method for suppressing stimulation of an examination subject
    • MR断层摄影装置和抑制检查对象刺激的方法
    • US06418336B1
    • 2002-07-09
    • US09632789
    • 2000-08-04
    • Ralph KimmlingenFranz Schmitt
    • Ralph KimmlingenFranz Schmitt
    • A61B5055
    • G01R33/3852
    • In an MR tomography system and a method for operating an MR tomography system for the purpose of executing both fast and conventional measuring sequences with high image resolution without triggering stimulations in a living subject and with a high degree of freedom in the selection of imaging regions, a gradient coil is provided with at least two independently controllable potions, so that it is possible to set up gradient fields for a first imaging subregion and for a second imaging subregion that is not a subset of the first region and does not contain it, as well as an aggregate imaging region that contains at least the first and second imaging regions. The gradient fields for different regions can be set up in chronological succession, the various possibilities for setting up the gradient fields allows a selection dependent on the set measuring sequences to be determined prior to the execution of data acquisition with an examination subject present, so that stimulations do not occur in the actual execution of measuring sequences for image data acquisition.
    • 在MR断层摄影系统和用于操作MR断层摄影系统的方法中,为了执行具有高图像分辨率的快速和常规测量序列,而不在活体中触发刺激,并且在成像区域的选择中具有高自由度, 梯度线圈设置有至少两个可独立控制的药水,使得可以为第一成像子区域和不是第一区域的子集而不包含第一成像子区域的第二成像子区域设置梯度场,如 以及至少包含第一和第二成像区域的聚集成像区域。 可以按时间顺序设置不同区域的梯度场,用于设置梯度场的各种可能性允许在使用检查对象存在的数据采集执行之前确定依赖于所设置的测量序列的选择,使得 在图像数据采集的测量序列的实际执行中不会发生刺激。
    • 39. 发明授权
    • Switchable gradient coil arrangement
    • 可切换梯度线圈布置
    • US6157280A
    • 2000-12-05
    • US436519
    • 1999-11-09
    • Winfried ArzLothar RegenfusFranz Schmitt
    • Winfried ArzLothar RegenfusFranz Schmitt
    • G01R33/385H01F5/00
    • G01R33/385
    • A switchable gradient coil arrangement for a magnetic resonance tomography apparatus, has conductor ends in the primary plane (or planes) that can be differently connected to one another and/or to conductor ends in the secondary plane (or planes) to form respective coil arrangements having different field qualities/performance features. The connections are produced by a switch system composed of standard switches for the logical interconnection of the individual sub-coils, in the form of at least four bipolar switches. One of these switches, as a power connection switch connects the ends of each sub-coil to the power terminals, one switch is connected parallel to the sub-coil, and at least one switch is arranged in a connection branch that branches for optional connection to other sub-coils.
    • 用于磁共振断层摄影装置的可切换梯度线圈装置具有在主平面(或平面)中的导体端,其可以在二次平面(或平面)中彼此不同地连接和/或导体端,以形成相应的线圈装置 具有不同的场质量/性能特征。 连接由至少四个双极开关形式的由各个子线圈的逻辑互连的标准开关组成的开关系统产生。 这些开关中的一个作为电源连接开关将每个子线圈的端部连接到电源端子,一个开关并联到子线圈,并且至少一个开关布置在连接分支中,用于可选连接 到其他子线圈。