2017 Imaging for Physicists Coursebook

Imaging Gradients

isocentre

• 3 orthogonal or in combination

B 0

G z

= dB 0

/dz

 Spatially encode image

• Higher amplitudes mean:  Better resolution  greater diffusion weighting • Faster switching rates mean:  Faster scans

180 °

90 °

RF

G z G y

G x