In-room imaging and MR planning

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

112

Siemens

1.5

106

GE

1.5

110

Varian

3.0

118

Bruker

3.0

113

First

Painful at 134 dB Permanent damage at 120 dB

Field

thuMb

Motion

seCond

Current

F

= I dl  B 0

L