Reduced Echo Time Dualband Spatial-Spectral Pulse Sequence for Brain MRSI at 3T
Balchandani P, Spielman D
1H MRSI is a useful technique for measuring metabolite levels in the brain. In this study, the use of a PRESS sequence with only one dualband spatial-spectral (SPSP) linear phase 90 pulse and two standard spatial 180 pulses is proposed for brain MRSI. This sequence provides spectral selectivity while allowing significantly lower echo times than existing SPSP PRESS sequences for the brain. At 3T, shorter echo times result in higher metabolite SNRs. In vivo data shows that the linear phase dualband SPSP 90 pulse successfully suppresses fat when compared to the standard GE PRESS sequence at the same echo time.