Spectroscopic Localization by Simultaneous Acquisition of the Double-Spin and Stimulated Echoes

Localization is an essential requirement for almost all proton magnetic resonance spectroscopy (MRS) acquisitions. Localization modules either acquire the spin echo (e.g., PRESS, LASER, semi-LASER, etc) or the stimulated echo (STEAM). We propose a localization module which acquires both coherence pathways. Compared to PRESS, this substantially reduces chemical shift displacements, specific absorption rates, minimum TE and increases B1+ immunity, much like STEAM, but at only a modest reduction in signal to noise (i.e. without the 50% signal loss associated with STEAM).

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