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Preterm EEG: A Multimodal Neurophysiological Protocol
Published on: February 18, 2012
Observer variability assessing US scans of the preterm brain: the ELGAN study
Karl Kuban1, Ira Adler, Elizabeth N Allred
1Division of Pediatric Neurology, Boston University Medical Center, Boston University School of Medicine, Boston, MA, USA.
Pediatric Radiology
|September 29, 2007
Summary
Neurosonography reliability for diagnosing brain lesions in premature infants varies. While intraventricular hemorrhage and ventriculomegaly showed good agreement, hyperechoic lesions had poor reliability, impacting research quality.
Area of Science:
- Neonatal Neurology
- Medical Imaging
- Pediatric Radiology
Background:
- Neurosonography is crucial for documenting brain lesions in neonates.
- The diagnostic reliability of neurosonography needs further investigation.
Purpose of the Study:
- To assess observer variability among experienced neurosonologists.
- To evaluate the reliability of specific neurosonographic findings in preterm infants.
Main Methods:
- Analysis of 1,450 ultrasound scans from infants born before 28 weeks postmenstrual age.
- Two independent sonologists assessed scans for intraventricular hemorrhage (IVH), ventriculomegaly, and white matter lesions (hyperechoic/hypoechoic).
- A third sonologist resolved discordant readings.
Main Results:
- High agreement was found for IVH, ventriculomegaly, and hypoechoic lesions (kappa 0.62-0.68).
- Hyperechoic lesions demonstrated significantly lower agreement (kappa 0.32).
- Tie-breaking reader agreement was ~40% for most findings, but only ~25% for hyperechoic lesions.
Conclusions:
- Concordance among readers is essential for ensuring high-quality neurosonographic images for clinical research.
- Specific findings like hyperechoic lesions require further refinement in diagnostic criteria or training.
