title: Neonatal brain metabolite concentrations: an in vivo magnetic resonance spectroscopy study with a clinical MR system at 3 Tesla.
abstract: Brain metabolite concentrations change dynamically throughout development, especially during early childhood. The purpose of this study was to investigate the brain metabolite concentrations of neonates (postconceptional age (PCA): 30 to 43 weeks) using single-voxel magnetic resonance spectroscopy (MRS) and to discuss the relationships between the changes in the concentrations of such metabolites and brain development during the neonatal period. A total of 83 neonatal subjects were included using the following criteria: the neonates had to be free of radiological abnormalities, organic illness, and neurological symptoms; the MR spectra had to have signal-to-noise ratios ≥ 4; and the estimated metabolite concentrations had to display Cramér-Rao lower bounds of ≤ 30%. MRS data (echo time/repetition time, 30/5000 ms; 3T) were acquired from the basal ganglia (BG), centrum semiovale (CS), and the cerebellum. The concentrations of five metabolites were measured: creatine, choline, N-acetylaspartate, myo-inositol, and glutamate/glutamine complex (Glx). One hundred and eighty-four MR spectra were obtained (83 BG, 77 CS, and 24 cerebellum spectra). Creatine, N-acetylaspartate, and Glx displayed increases in their concentrations with PCA. Choline was not correlated with PCA in any region. As for myo-inositol, its concentration decreased with PCA in the BG, whereas it increased with PCA in the cerebellum. Quantitative brain metabolite concentrations and their changes during the neonatal period were assessed. Although the observed changes were partly similar to those detected in previous reports, our results are with more subjects (n = 83), and higher magnetic field (3T). The metabolite concentrations examined in this study and their changes are clinically useful indices of neonatal brain development.
authors: Research Center for Charged Particle Therapy, National Institute of Radiological Sciences, Chiba, Japan ; Department of Radiology, Kanagawa Children's Medical Center, Yokohama, Japan ; Research Center for Child Mental Development, Chiba University Graduate School of Medicine, Chiba, Japan.
authors: Moyoko
authors: M
authors: Tomiyasu
authors: Noriko
authors: N
authors: Aida
authors: Mamiko
authors: M
authors: Endo
authors: Jun
authors: J
authors: Shibasaki
authors: Kumiko
authors: K
authors: Nozawa
authors: Eiji
authors: E
authors: Shimizu
authors: Hiroshi
authors: H
authors: Tsuji
authors: Takayuki
authors: T
authors: Obata
mesh_terms: D001921:Brain / Q000378:metabolism*; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D009682:Magnetic Resonance Spectroscopy / Q000379:methods*; D008297:Male; D025341:Principal Component Analysis; D012189:Retrospective Studies