Exact(27)
The PRESS sequence was simulated with NMR-SCOPE.
Five exemplary pulses were implemented into a PRESS sequence and validated by acquiring images of a water oil phantom and lactate spectra at TE = 144 ms.
MRI (magnetic resonance imaging) was performed with a 1.5 T system; spectral acquisition was performed with a single-voxel technique and a PRESS sequence.
The MEGA-PRESS sequence is able to highlight the GSH signal by adding two editing pulses with a normal PRESS sequence.
Using a PRESS sequence with parameters: TR, 10 s; TE, 9 ms and 64 averages, localised 1H MRS from the voxels were collected.
Full credit (a score of 1) was given for each correct, 5-key press sequence; partial credit was given for sequences with four consecutive key presses (score of 0.8) and three consecutive key presses (score of 0.6).
Similar(33)
Proton magnetic resonance spectroscopy data were acquired from sensorimotor and parietal regions of the brains' left cerebral hemisphere using a MEGA-PRESS sequence.
GSH spectra were acquired by the MEGA-PRESS sequence [25].
One possibility may be due to the difference of technique (MEGA-PRESS sequence vs. a double quantum coherence filter) for GSH measurement.
In this study, we found no alteration in GSH concentrations in the brains of schizophrenic patients, which was consistent with a previous report using the MEGA-PRESS sequence [12], but not a previous report using a double quantum coherence filter technique [10].
Edited GABA spectra were acquired using the MEGA-PRESS sequence (TR/TE = 2000/68 ms, 144 averages, TA = 4 56 blocks) with 20 ms double-banded Gaussian inversion pulses for simultaneous spectral editing and water suppression (Mescher et al., 1998).
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