Diffusion-weighted magnetic resonance imaging in infants with periventricular leukomalacia

Area of Science:

• Neonatal neurology
• Pediatric radiology
• Neuroimaging

Background:

• Periventricular leukomalacia (PVL) is a common neonatal brain injury.
• Early detection of PVL is crucial for timely intervention.
• Conventional MRI may not detect subtle PVL changes early.

Purpose of the Study:

• To investigate diffusion-weighted imaging (DWI) findings in neonatal periventricular leukomalacia (PVL).
• To assess the correlation between mean apparent diffusion coefficient (ADC) values and PVL characteristics.
• To evaluate the relationship between DWI findings and clinical outcomes.

Main Methods:

• Studied 98 infants (gestational age 27-33 weeks) between April 2006 and July 2007.
• Performed DWI in the first week of life for infants with electroencephalography-indicated PVL.
• Analyzed mean ADC values in periventricular white matter, posterior limbs of internal capsules (PLICs), and other brain regions.

Main Results:

• DWI identified PVL in three of four infants with electroencephalography findings.
• Decreased diffusivity was observed throughout the white matter, predominantly posteriorly.
• DWI detected broader abnormalities, including in the corpus callosum and PLICs, compared to later conventional MRI.
• ADC value changes in the PLICs correlated with PVL severity.

Conclusions:

• DWI provides valuable early information on PVL.
• Decreased diffusivity in the corticospinal tract on DWI is associated with later motor impairment.
• DWI findings enhance the understanding and detection of PVL.