2016_Imaging for Physicists

Gradients

Manufacturer

Field Strength (T)

SPL (dB(A))

• Eddy currents degrade imaging pre-emphasis (compensation) Active shielding • Lorentz force causes vibrations Noise & reduction methods

Philips

1.5 1.5 1.5 3.0 3.0

112

Siemens

106 110 118 113

GE

Varian

Bruker

First Field

thuMb

Motion

seCond

Current