2016_Imaging for Physicists

Distortion mapping

ν

Gradient reversal and subtraction

Frequency encoding:

G ΔB

x G ΔB

G

x

x

x + +=′

0

x

Phase encoding:

G ΔB

G

y

y +=′ y

Residual gradient

B 0

component

y

Walker et al. Med Phys 2015;42:1982-1991