2017 Imaging for Physicists Coursebook

Homogeneity (Inside the Magnet)

Uniform imaging volume at isocentre

e.g. DSV 40cm

= 0.2 ppm

40 cm

(at 1.5 T): 0.2 x 63.87 MHz = 12.8 Hz

• Magnet is shimmed at installation- additional (dynamic) shimming may be required