Purpose To measure in vivo transverse relaxation times (T2) of gamma-aminobutyric acid (GABA) at 7T using the experimental spectral-editing method. Materials and Methods Experiments were performed at 7T in a 10 mM GABA phantom to determine the intrinsic TE-dependence of the edited signal. Then the same method was applied with editing-based suppression of coedited macromolecular signals to five healthy volunteers to determine T2 of GABA in vivo. Results From in vivo data acquired at multiple echo times, the in vivo GABA T2 relaxation time was estimated to be 63 ± 19 msec. Conclusion We present a measurement of the T2 of edited GABA signal at 7T by first using phantom measurements to determine the echo time-dependence of edited signal. The method is purely experimental and does not rely on prior knowledge of coupling constants or simulation of realistic experiments. J. Magn. Reson. Imaging 2013;38:1224-1229. © 2013 Wiley Periodicals, Inc.
- magnetic resonance spectroscopy
- transverse relaxation
ASJC Scopus subject areas
- Radiology Nuclear Medicine and imaging