방사선사나라 Radiographer Nara

(영어/영문/English) The gradient echo (GRE) does not use two RF pulse waveforms, 90º and 180º, like spin-echo, but mainly uses one RF pulse waveform smaller than 90º to obtain an image from the FID signal. First, place the longitudinal magnetization with the transverse magnetization with the RF pulse waveform of aº, then dephase the spins by applying a negative gradient in the frequency direction, a..