2017 Imaging for Physicists Coursebook

Acoustic Noise

Manufacturer

Field Strength (T)

SPL (dB(A))

Lorentz force causes gradient coils to vibrate Sequence dependent Increases with B 0

Philips

1.5 1.5 1.5 3.0 3.0

112

Siemens

106 110 118 113

GE

Varian

Bruker

First

Painful at 134 dB Permanent damage at 120 dB

Field

thuMb

Motion

0 B lId F   

seCond

 

Current

L