Fig. 1.

A pulse sequence diagram of spoiled gradient echo imaging displaying the timing of all major events during imaging. These are slice selective (Gslice), phase encoding (Gphase), and readout (Gread) gradients, applied RF pulses for excitation (RF), and acquisition (AQ) of induced signals, or echoes. Spatial encoding is for a 2-D Cartesian grid: Gread is on during the acquisition window; encoding in the orthogonal, phase encoding direction is accomplished by repeating this acquisition step multiple times with phase encode gradient pulses of increasing amplitudes.