A Structure Design Method for Reduction of MRI Acoustic Noise

Figure 13

Acoustic field distribution with single-frequency gradient pulse input at 110 Hz: (a) acoustic field distribution in the split MRI system without horn, (b) acoustic field distribution in the split MRI system with horn of 55 cm length, and (c) acoustic field distribution in and around the split MRI system with horn of 55 cm length. For (c), it has the same result with different legend scale from (b) so as to clearly display the wave guide effect by applying horn structure.

(a)

(b)

(c)