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Updated: May 14, 2025
Diffusion Tensor Magnetic Resonance Imaging in the Analysis of Neurodegenerative Diseases
Published on: July 28, 2013
Diffusion MRI tractography with along-tract profiling reveals subtle neurodevelopmental differences between moderate
Anouk S Verschuur1, Chantal M W Tax2, Ingrid M Nijholt3
1Department of Radiology, Isala Hospital, Dokter van Heesweg 2, 8025 AB Zwolle, The Netherlands; Image Sciences Institute, University Medical Center Utrecht, Heidelberglaan 100, 3584 CX Utrecht, The Netherlands; Department of Pediatrics, Section of Newborn Critical Care, University of Calgary, 3330 Hospital Drive NW, Calgary AB T2N 4N1, Canada.
Moderately preterm infants show subtle white matter differences compared to late preterm infants, suggesting variability in maturation. Further research is needed to understand these early brain development changes.
Area of Science:
- Neuroscience
- Developmental Pediatrics
- Medical Imaging
Background:
- Moderately preterm (MP) infants (32-33 weeks' gestation) face higher developmental risks than late preterm (LP) infants (34-36 weeks' gestation).
- Understanding the neurobiological basis for these differing risks is crucial for targeted interventions.
- Fiber bundle tractography offers a novel approach to investigate white matter development in preterm infants.
Purpose of the Study:
- To compare along-tract white matter profile differences between MP and LP infants at term-equivalent age (TEA).
- To explore the utility of fiber bundle tractography in identifying maturational variations in preterm infants.
Main Methods:
- Diffusion MRI (dMRI) was performed on 95 infants (31 MP, 64 LP) around TEA (40-44 weeks postmenstrual age).
- TractSeg was used to reconstruct 15 major fiber bundles.
- Along-tract profiles of fractional anisotropy (FA) and mean diffusivity (MD) were analyzed using tractometry.
Main Results:
- Fiber bundle reconstructions were anatomically consistent.
- No significant differences in FA and MD profiles were found between MP and LP infants.
- Trends towards along-tract differences were observed, with substantial inter-individual variability noted.
Conclusions:
- Along-tract differences, though not statistically significant, suggest subtle alterations in white matter maturation between MP and LP infants.
- The study highlights the potential of along-tract variability as a focus for future research into preterm infant neurodevelopment.
- Further investigation is warranted to link these early maturational differences to later neurodevelopmental outcomes.
