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Analytical solution for phase modulation in BURST imaging with optimum sensitivity
P van Gelderen1, J H Duyn, C T Moonen
1NIH in Vivo NMR Research Center, BEIP, NCRR, Bethesda, Maryland 20892-1060, USA.
Journal of Magnetic Resonance. Series B
|April 1, 1995
Abstract:
In order to improve the efficiency of BURST imaging, a new phase-modulation scheme of the DANTE-type RF excitation is proposed. It is shown that analytical optimization of the phase-modulation scheme with optimal SNR can be found for an arbitrary number N of subpulses in the RF excitation. Both theory and experiment indicate a maximum attainable gain in efficiency of the square root of N, compared to nonmodulated (constant-phase) excitation schemes.