The multislice RF pulse excitation is required in some simultaneous multi-slice (SMS) methods. The aim of this study was to investigate the synthesis method and SAR (Specific Absorption Rate) of multislice PINS (Power Independent of Number of Slices) SLR RF pulses for Wideband MRI and other SMS methods.
The relative values of SAR of the standard SLR and PINS SLR RF pulses with different number of slices W are presented. It can be found that the values of SAR of PINS SLR pulses were greatly reduced compared to that of the standard SLR pulses. For example, The SAR of PINS SLR with W = 5 is only 38% of that of standard SLR with W = 5. And The SAR of PINS SLR with W = 5 is only 1.9 times of that of standard SLR with W = 1.