✍ Scribed by Jian-Ming Zhu; Ian C.P. Smith
No coin nor oath required. For personal study only.
Spectral localization using the stimulated-echo acquisition mode (STEAM) is one of the most popular methods in volume-localized in vivo NMR spectroscopy. The localized volume signal is generated via stimulated echoes from spins excited by three 90 degrees 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 from in vivo rat brain.
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## Abstract A new method which combines localized high‐resolution proton NMR spectroscopy with two‐dimensional correlated spectroscopy using stimulated echoes is presented. Stimulated‐echo correlated spectroscopy (STECSY) is a straightforward extension of the STEAM method. Experiments with phantoms
## Abstract This study describes a new single spin‐echo spatial localization sequence, BASSALE or BAnd‐Selective Spin echo Acquisition for Localized Editing, that overcomes a number of the limitations of the STEAM and PRESS volume selection pulse sequences. It achieves __conformal__ volume localiza
Localized proton NMR spectroscopy using stimulated echoes (STEAM) has been used to study metabolites in different proximal skeletal muscles of normal volunteers at rest. Single scan water-suppressed proton NMR spectra obtained at 1.5 and 2.0 T (Siemens Magnetom) from a 64-ml volume-of-interest (VOI)
Water-suppressed localized proton NMR spectroscopy using stimulated echoes has been successfully applied to detect metabolites in the human brain in vivo. The STEAM spectroscopy sequence allows single-step localization by exciting three intersecting slices. Water suppression is achieved by preceding