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发明授权
CN1987510B 用于调整高频脉冲的场强的方法和为此的磁共振测量系统 失效 - 权利终止 转让

用于调整高频脉冲的场强的方法和为此的磁共振测量系统
摘要：
本发明描述了一种用于调整在磁共振测量中由磁共振测量系统(1)的高频天线(4)发出的高频脉冲的场强的方法。在此，首先通过由有关高频天线(4)发出带有确定脉冲幅度的高频脉冲(HFA，HFR1，HFR2)对一个试验体积层(VP)进行激励，并且沿该试验体积层(VP)的一个伸展方向(x)确定一维位置分辨的特征值(α(x))，这些特征值分别代表了该试验体积层(VP)的垂直于该伸展方向(x)延伸的条(S)中的B1场的局部场强。然后，至少在一个确定的片段(a，a′，a″)上沿所述试验体积层(VP)的伸展方向(x)上求出所确定的特征值的平均值(αM)。最后，在该平均值(αM)的基础上确定为待实施的磁共振测量的、待设置的高频脉冲的脉冲幅度。此外，本发明还描述了一种对应的磁共振测量系统(1)，其中，可以利用这种方法进行调整。
摘要（英）：

The invention concerns a method for adjustment of radio-frequency pulses which are emitted by a radio-frequency antenna (4) of a magnetic resonance measurement system (1) in a magnetic resonance measurement. A test volume slice (VP) is initially excited by emission of radio-frequency pulses (HFA, HFR1, HFR2) with a defined pulse amplitude by the radio-frequency antenna (4). Along an extent direction (x) of an extent of the test volume slice (VP), one-dimensional, spatially resolved characteristic values (alpha(x)) are determined which respectively represent the local field strength of the B1 field in strips of the test volume slice (VP) running perpendicularly to the spatial direction (x). An average value (alphaM) of the determined characteristic values (alpha(x)) is then formed over at least over one determined segment (a, a', a'') along the extent direction (x) of the test volume slice (VP). A pulse amplitude of the radio-frequency pulses that is to be set for the magnetic resonance measurement to be implemented is determined on the basis of the average value (alphaM). Moreover, the invention also describes a corresponding magnetic resonance measurement system (1), wherein the method above can be used for adjustment.

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