In vivo measurement of brain metabolites using two-dimensional double-quantum MR spectroscopy - Exploration of GABA levels in a ketogenic diet

Zhiyue J. Wang, Christina Bergqvist, Jill V. Hunter, Dongzhu Jin, Dah Jyuu Wang, Suzanne Wehrli, Robert A. Zimmerman

Research output: Contribution to journalArticle

53 Scopus citations

Abstract

A localized proton 2D double-quantum (DQ) spin-echo spectroscopy technique was implemented on 1.5 T clinical MRI scanners for the detection of γ-aminobutyrate (GABA) in the brain. The 2D approach facilitates separation of peaks overlapping with GABA in 1D DQ-filtered (DQF) spectra. This technique was applied to four normal adult volunteers and four children with intractable epilepsy. The coefficient of variation of the level of GABA and overlapping macromolecules at F2 = 3.0 ppm and F1 = 4.8 ppm was 0.08 in normal subjects. Three patients received 2D MRS scans before and after initiation of the ketogenic diet (KD): one patient showed a trend of decreasing GABA throughout the study, and two patients showed low initial GABA levels that increased over time. In addition to major metabolites and GABA, low-level metabolites (valine, leucine, and glutathione) were also identified in the 2D spectra.

Original languageEnglish (US)
Pages (from-to)615-619
Number of pages5
JournalMagnetic resonance in medicine
Volume49
Issue number4
DOIs
StatePublished - Apr 1 2003

Keywords

  • 2D double-quantum spectroscopy
  • Brain
  • Epilepsy
  • GABA
  • Ketogenic diet
  • Magnetic resonance

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

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