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    • 3. 发明授权
    • Method and device for acquiring data for diffusion-weighted magnetic resonance imaging
    • 用于获取扩散加权磁共振成像数据的方法和装置
    • US06842000B2
    • 2005-01-11
    • US10468159
    • 2002-02-21
    • David NorrisWolfgang Driesel
    • David NorrisWolfgang Driesel
    • G01R33/48A61B5/055G01R33/563G01R33/567G01V3/00
    • G01R33/56509G01R33/56341
    • The invention relates to a magnetic resonance imaging method which is characterized in that the transversal magnetization excited in the object to be imaged is diffusion-weighted before the useful echo (E) used for the reconstruction of an image is induced. When the object is moved, phase changes in the diffusion-weighted transversal magnetization can occur that lead to artifacts in the reconstructed image. These disturbing phase changes are measured by analyzing a navigation signal (N1, N2) that is generated before the useful signal is generated. The result of the measurement is used to change the phase characteristics of the transversal magnetization online by a correctional intervention (C0, C1, C2) in such a way that the measured phase changes are compensated. The invention further relates to a magnetic resonance device for carrying out said method.
    • 本发明涉及一种磁共振成像方法,其特征在于,在用于重建图像的有用回波(E)被诱导之前,在待成像对象中激发的横向磁化被扩散加权。 当物体移动时,扩散加权横向磁化的相位变化可能会导致重构图像中的伪像。 通过分析在生成有用信号之前产生的导航信号(N1,N2)来测量这些干扰相位变化。 测量结果用于通过校正干预(C0,C1,C2)在线改变横向磁化的相位特性,使得测量的相位变化得到补偿。 本发明还涉及一种用于执行所述方法的磁共振装置。