Stimulated Anti-Echo Selection in Spatially Localized NMR Spectroscopy
1999; Elsevier BV; Volume: 136; Issue: 1 Linguagem: Inglês
10.1006/jmre.1998.1621
ISSN1096-0856
AutoresJian‐Ming Zhu, Ian C. P. Smith,
Tópico(s)Advanced NMR Techniques and Applications
ResumoSpectral localization using the stimulated-echo acquisition mode (STEAM) is one of the most popular methods in volume-localizedin vivoNMR spectroscopy. The localized volume signal is generated via stimulated echoes from spins excited by three 90° RF pulses, and the conventional STEAM sequence detects the stimulated-echo signal. From an analysis of the STEAM pulse sequence using the coherence transfer pathway formalism, stimulated anti-echoes are also formed by the same pulse sequence, which constitute the other half of the localized signal in the STEAM experiment. A new scheme of pulsed field gradients for the selection of stimulated anti-echoes was proposed, and localized spectroscopy in the stimulated anti-echo selection mode was achieved on a phantom and fromin vivorat brain.
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