Method of magnetic resonance imaging for the production of rare images with additional preparation of the magnetization for contrast variation

摘要

An improved rapid acquisition relaxation enhanced (RARE) imaging method for measuring nuclear magnetic resonance in selected regions of a body is disclosed. The improved RARE imaging method includes introducing an evolution phase of time duration t2 between the excitation pulse and the first refocusing pulse of the multi-echo train. The evolution phase is introduced to influence the magnetization of the observed nuclei in such a fashion that the intensity and/or phase of the subsequent signals are influenced as a function of this evolution phase. This allows the effects of flow, motion, diffusion and local magnetic field inhomogenities to be measured.