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Sonographic detection of the optic radiation
Annemieke Boxma1, Maarten Lequin, Luca A Ramenghi
1Neonatal Intensive Care Unit, Sophia Children's Hospital, Rotterdam, The Netherlands.
Acta Paediatrica (Oslo, Norway : 1992)
|November 22, 2005
Summary
This study identified a hyperechoic para-atrial region (PAROI) in preterm infants, likely representing optic radiation. Its absence may indicate white matter injury in neonates.
Area of Science:
- Neonatal neuroimaging
- Pediatric neurology
- White matter development
Background:
- Premature infants are susceptible to white matter injury.
- Early detection of white matter abnormalities is crucial for prognosis.
- The para-atrial region (PAROI) in preterm infants requires further characterization.
Purpose of the Study:
- To describe a hyperechoic white matter region adjacent to the lateral ventricle atrium in preterm infants.
- To investigate the potential relevance of this finding for detecting preterm white matter injury.
Main Methods:
- Cranial ultrasound images of 92 preterm infants (gestational age ≤32 weeks) were analyzed.
- Grey values of the PAROI were measured relative to the choroid plexus.
- Comparison with MRI and anatomical atlases was performed.
- The presence of PAROI was examined in nine preterms with known white matter damage.
Main Results:
- A hyperechoic para-atrial area (PAROI) was detected in 84% of preterm infants.
- The PAROI's location corresponds to the optic radiation.
- No correlation was found between PAROI grey value and gestational age (26-31 weeks).
- Infants with white matter damage lacked clearly distinguishable PAROIs.
Conclusions:
- The consistent acoustic characteristics suggest the PAROI is a normal anatomical structure.
- The PAROI's location supports its identification as part of the optic radiation.
- Further research is needed to determine if the absence of PAROI can predict the severity of white matter injury.