METHOD AND DEVICE FOR ACQUIRING DATA FOR DIFFUSION-WEIGHTED MAGNETIC RESONANCE IMAGING

摘要

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.