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T2 relaxation values in the developing preterm brain.

Serena J Counsell1, Nigel L Kennea, Amy H Herlihy

  • 1Robert Steiner MR Unit, Imaging Sciences Department, MRC Clinical Sciences Centre, Hammersmith Campus, Imperial College, DuCane Road, London, England.

AJNR. American Journal of Neuroradiology
|September 19, 2003
PubMed
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T2 values in the preterm brain decrease as postmenstrual age (PMA) increases. This finding aids in understanding brain maturation and disease using MR imaging in infants.

Area of Science:

  • Neuroimaging
  • Developmental Neuroscience
  • Pediatric Radiology

Background:

  • Magnetic Resonance (MR) imaging is crucial for assessing preterm infant brain development.
  • Understanding T2 value changes with postmenstrual age (PMA) is key for accurate interpretation of MR images.

Purpose of the Study:

  • To determine T2 values in the preterm brain from 25 weeks' gestational age (GA) to term-equivalent age.
  • To correlate T2 values with increasing PMA in infants with normal neurodevelopmental outcomes.

Main Methods:

  • MR imaging T2 measurements were performed on 18 preterm infants (born ≤33 weeks GA).
  • T2 values were acquired using a 1.0-T MR system with a four-echo pulse sequence.
  • Measurements were taken in specific brain regions: thalami, lentiform nuclei, and white matter areas.

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Main Results:

  • A significant negative linear correlation between T2 values and PMA was observed in the lentiform nuclei, frontal white matter, occipital white matter, and central white matter.
  • T2 values did not show a significant reduction with increasing PMA in the thalami.

Conclusions:

  • T2 values in the preterm brain demonstrate a decrease with advancing postmenstrual age.
  • These findings support the use of T2 values as an objective measure of brain maturation in preterm infants.