R. Deichmann et al., CALCULATION OF SIGNAL INTENSITIES IN HYBRID SEQUENCES FOR FAST NMR IMAGING, Magnetic resonance in medicine, 34(3), 1995, pp. 481-489
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.