Method for optimizing radio frequency pulses in fast spin echo pulse sequence

The invention discloses a method for optimizing a radio frequency pulse in a fast spin echo pulse sequence. According to the method, the spin echo and the stimulated echo are separated by using the difference of the effects of the phase-disturbing gradient on the spin echo and the stimulated echo, and the stimulated echo or the spin echo disappears respectively by combining with reverse pulses with the same flip angle [theta] and different phases, so that the spin echo and the stimulated echo are independently adjusted; and the method further includes optimizing the phase of the reverse pulseby utilizing the relationship between the spin echo and the stimulated echo and the phase of the reverse pulse. The invention aims to solve the problem that the FSE sequence optimization process is affected due to the fact that pi pulses are not adopted in reverse pulses. The flip angle theta used in actual scanning is directly adopted to optimize the reverse pulse, the efficiency and accuracy ofradio frequency pulse opti