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Zusammenfassung:
Single voxel MRS techniques employ at least three RF-pulses to generate an echo in the selected volume and gradients to dephase magnetization in the outer region. During the time between excitation and acquisition, relaxation effects and phase modulation by J-couplings affect the NMR signal. The STEAM sequence can be applied with very short echo times to obtain localized spectra containing fast decaying components and peaks from all detectable coupled resonances. We show in vivo spectra from the rat brain acquired at 16.4 T with localized spectroscopy using echo times below 2 ms and compare them to results from the literature.
