A time shifted Fast Spin
Echo (FSE) thermometry sequence which is insensitive to B0 inhomogeneity is
used in conjunction with restricted FOV module and parallel imaging to reduce
scan time and increase the number of slices. Up to 5 slices are acquired in 3
sec. This sequence works well on a clinical Focused Ultrasound brain system. The
temperature signal to noise ratio (TSNR) of this FSE sequence is approximately
2 times higher than the conventional Gradient Echo (GRE) sequence used today. 3
to 5 slices are acquired in 3 sec, rather than 1 slice with GRE.