173 / 1363
Acoustic Noise
Lorentz force causes
gradient coils to vibrate
Sequence dependent
Increases with B
0
Manufacturer
Field
Strength (T)
SPL
(dB(A))
Philips
1.5
112
Siemens
1.5
106
GE
1.5
110
Varian
3.0
118
Bruker
3.0
113
0
B lId F
L
seCond
thuMb
First
Field
Motion
Current
Painful at 134 dB
Permanent damage at 120 dB