On the generation of Half-Sinc pulses for optimal excitation profile

Introduction It has been noted in a number of reports that the response of species with rapid T2 decay to excitation pulses (or inversion pulses, for that matter) is more complex than for their longer-lived counterparts. More specifically, it has been shown that even for infinite TR, the nominal flip angle that produces the greatest amount of signal is not 90 degrees but an increasingly smaller fraction of 90 degrees that decreases with the product of T2×B1, where T2 is the transverse decay constant of the species, and B1 is the amplitude of the RF pulse.