Spin Echo Versus Gradient Echo

dephase

read out gradient

r.f.

gradients

signal

TE

90

180

dephase

read out gradient

r.f.

gradients

signal

TE

90

Spin echo

Gradient echo

- relatively insensitive to static field shifts

- sensitive to diffusion processes

- very sensitive to static field shifts

- less sensitive to diffusion processes

(T2)

(T2*)

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