. Author manuscript; available in PMC: 2011 Nov 11.

Published in final edited form as: J Magn Reson. 2010 Jan 28;203(2):283–293. doi: 10.1016/j.jmr.2010.01.010

Table 2.

Summary of experimental performance in MRSI and SVS 3T measurements (except of the RF pulses, the same acquisition parameters were used, in particular TE = 45 ms and TR = 1.5s)

RF pulse	CSDE	Uniformity of excitation	Lipid contamination	Eddy currents	SNR	SAR (%)^a
GOIA-W(16,4)^b	+++	+++	−	−	++++	72
GOIA-HS(8,4)^b	+++	++	+	+	+++	55
FOCI^b	+++	+	+	++	++	100^d
Mao^c	−	−	++++	−	+	20

^a)

percentage from the maximum allowed of 3W/kg, measured by the SAR watchdog monitor in the volunteer case;

^b)

LASER sequence;

^c)

PRESS sequence;

^d)

SAR for 1 kHz FOCI pulse. In the case of the optimal 1.463 kHz RF amplitude for FOCI the SAR would be 214 % (TR > 3 s would be necessary to reduce SAR below 100 %). Plus (+) and (−) symbols are given as a qualitative measure of the performance: i) for CSDE, uniformity of excitation and SNR the number of +/− is related to better/worse performance (ie. reduced CSDE and increased uniformity, which are the desired features, are specified by the number of +); ii) for lipid contamination and eddy currents the number of +/− relates to worse/better performance (ie. + means presence of lipids and eddy currents artifacts, which are not the desired features).