T1 and T2 measurements were made in 8 neonates (median age 42+1 weeks) scanned on a 7 Tesla MRI system, using inversion recovery and spin echo methods respectively. The aim of this study is to help to establish expected ranges, to prepare for systematic relaxometry studies, and to identify optimal operating points for imaging neonates at ultra-high field. Region of interest measurements show strong age dependence of T1, and some variation in T2 (particularly in frontal white matter). The measured T1 times are longer than in adults at 7T, and also longer than in neonates imaged on lower field systems.
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Malik et al. (2024) studied this question.
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