A rephasing or refocusing, which occurs when constant velocity spins return to the same starting phase they had directly after the initial exciting RF pulse, as a result of the application of an even number of gradient pulses. This may also result from the application of multiple gradient echo pulses following the RF pulse. The even echo rephasing phenomenon is one of the flow effects observed in MR imaging.

See Gradient Echo Sequence.

(LASE) See Gradient Echo Sequence and Spin Echo Sequence.

(Dual/FFE) A FFE technique with simultaneously acquired in and out of phase gradient echoes.

See Dual Echo Fast Gradient Echo.

(DFSE) Simultaneously acquired T2 and density weighted TE in FSE echo images.