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[Developmental changes in proton MR spectroscopy of the brain]
T Hashimoto1, M Tayama, M Miyazaki
1Department of Pediatrics, University of Tokushima, School of Medicine.
Insights
Proton MR spectroscopy (1H-MRS) reveals brain metabolite changes in children. N-acetylaspartate (NAA) levels increase with age, suggesting neuronal maturation, with frontal lobe development lagging behind the parietal lobe.
Area of Science:
- Neuroimaging
- Biochemistry
- Pediatrics
Context:
- Brain development in children is a complex process.
- Magnetic Resonance Spectroscopy (MRS) is a non-invasive technique to study brain metabolism.
- Understanding typical developmental trajectories is crucial for identifying atypical development.
Purpose:
- To investigate age-related changes in brain metabolites using proton Magnetic Resonance Spectroscopy (1H-MRS) in healthy children.
- To compare metabolite ratios in different brain regions (frontal vs. parietal) to assess regional maturation differences.
Summary:
- Volume-selective 1H-MRS was performed on 31 healthy children (1 month to 15 years) and one adult using a 1.5 T magnet.
- N-acetylaspartate (NAA), choline (Cho), and creatine (Cr) peaks were observed; lactate was not detected.
- Advancing age correlated with increased NAA/Cho and NAA/Cr ratios and decreased Cho/Cr ratios in the parietal region, with the most rapid changes occurring within the first 1-3 years of life.
- The frontal region showed a lower NAA/Cho ratio compared to the parietal region, suggesting delayed neuronal maturation in the frontal lobe.
Impact:
- Provides normative data for brain metabolite development in children.
- Highlights regional differences in brain maturation, with potential implications for understanding developmental disorders.
- Establishes 1H-MRS as a valuable tool for pediatric neurodevelopmental research.
Abstract:
Volume-selective proton MR spectroscopy (1H-MRS) of the brain was performed on a 1.5 T magnet in 31 healthy children aged from 1 month to 15 years and one healthy adult. Peaks of N-acetylaspartate (NAA), choline (Cho) and creatine (Cr) were observed in all cases on 1H-MRS, but not lactate. On 1H-MRS of the right parietal region, with advancing age, 1H-MRS revealed an increase in the ratios of NAA to Cho and NAA to Cr and a decrease in Cho to Cr. The most rapid change was noted during the first one to three years of life. 1H-MRS of the right frontal region was also performed in eleven cases. The ratio of NAA/Cho was smaller in the right frontal region than in the right parietal region. From this result, it may be suggested that the neuronal maturation in the frontal region delays as compared with the parietal region.