CALCULATION OF SIGNAL INTENSITIES IN HYBRID SEQUENCES FOR FAST NMR IMAGING

A number of techniques that recently have been used for fast NMR-imagi ng are based on a hybrid sequence of echo planar imaging (EPI) and FLA SH imaging: after each NMR excitation several k-space lines are measur ed, The complete k-space is covered by performance of several excitati ons, It has been observed that there is usually an optimal hybrid sequ ence that maximizes the signal-to-noise ratio, In this work, a method is presented that allows a determination of the optimal sequence as a function of the relaxation times T-1 and T-2.