Postmenstrual age (PMA) is used as a time-scale to evaluate brain development, but it contains inaccuracy with regards to the estimated time of conception because the duration from the last menstrual period to conception varies. To address this variation, we designed a developmental score (DevS) that aligned individuals with similar development patterns together, and provides a linear trajectory of DTI-measurement as a function of an underlying brain developmental index. Compared to PMA, DevS showed an improved the regression with DTI-measurements, and it better separated the developmental differences between term- and preterm-born infants.
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