2016_Imaging for Physicists
Result: geometrical distortion in spin-echo imaging
zyx B ) , ,(
G zyxB x x x ) , ,( ∆
∆ +=
+
0
1
G
G
x
x
In the frequency-encoding direction, both the non-linearity of the frequency- encoding gradient and static field inhomogeneity cause geometric distortions
G B y y y ∆ +=
1
G
y
In the phase-encoding direction, distortions are solely caused by the non- linearity of the phase-encoding gradient
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