mohoso
SE Hard Pulse Echo Sequence
Introducción
If we put another 180-degree pulse after 90-degree pulse, it will become the spin echo sequence which is also
called hard pulse echo sequence.
Pulse sequence parameter
SE sequence is shown in figure 1.
Higo 1 SE sequence
RFD: The sampling time of the first sampling point is controlled by the delay time of the 90° pulse, in ms;
P1: hard pulse 90° pulse width, unit us;
P2: hard pulse 180° pulse width, unit us;
TE: echo time, in ms, the time interval between the 180° pulse and the adjacent 180° pulse;
TW: repeat sampling waiting time, eso es, the time between the end of the previous sampling and the start of the
next sampling, in ms;
ACQ: The total time of signal acquisition, in ms