Driven equilibrium and fast-spin echo scanning

摘要: An NMR imaging process utilizes both driven equilibrium and fast-spin echo techniques to acquire image data. The technique is a multi-echo sequence, where 90-degree RF pulse applied at the center of any turns magnetization back in direction static magnetic field. Within short waiting time after that pulse, spins are ready be excited again. sequence follows first by series n 180-degree pulses, followed echoes. A second nth returns magnetization. multiple single-slice mode utilized individual slice images one time. continuous automatically over region interest. In either mode, adjacent slices can made overlap degree ranging from 0% 100%.