Background: Brain injury in premature infants (BIPI) seriously affects the growth and development of preterm infants. Magnetic resonance imaging (MRI) has become an important method of assessing brain development. The aim of this study was to explore the correlation between clinical features and total maturation score (TMS) by MRI in very low birth weight (VLBW) preterm infants with brain injury at term postmenstrual age (PMA).
Methods: A retrospective cohort of 65 cases of BIPI with VLBW and 40 normal control cases were included, and all cases underwent MRI examination. The 2 groups were assessed in terms of TMS and sub-parameters (myelination, cortical infolding, germinal matrix, bands of migrating glial cells), and the correlation between TMS and term PMA was also analyzed.
Results: The TMS of the BIPI group was lower than that of the control group (P<0.01). The differences in myelination and cortical infolding were statistically significant (P<0.01). No significant differences in the germinal matrix and bands of migrating glial cells were found. The linear regression equation showing a positive correlation between TMS and term PMA in normal preterm infants was y=1.164x-28.888 (t=9.478, P=0.000).
Conclusions: TMS by conventional cranial MRI can objectively reflect the brain maturity and brain damage of premature infants, and is related to the term PMA.
Keywords: Brain injury; brain development; magnetic resonance imaging (MRI); premature infants with very low birth weight; total maturational scores.