REDUCED POWER SELECTIVE EXCITATION RF PULSES

摘要

A method far limiting the peak power and total energy of an input pulse without degrading the resulting excitation. This is accomplished by recognizing that the total energy of the pulse is encoded in the lowest order Fourier series coefficients of the frequency response and then specifying the total energy of the pulse as a design parameter to the RF pulse synthesis algorithm. Peak power of the pulse may also be limited by selecting the proper roots for the frequency response describing the magnetization in the z-direction.