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Abstract #4980

Detection of intracranial hemorrhage in healthy neonatal mice by T2*-weighted 7T MRI

Rena Kono1, Maiko Ono2, Raj Kumar Parajuli2,3, Ryuta Koyama1, and Yuhei Takado2
1Graduate School of Pharmaceutical Sciences, The University of Tokyo, Tokyo, Japan, 2Institute for Quantum Life Science, National Institutes for Quantum Science and Technology, Chiba, Japan, 3Sydney Imaging Core Research Facility, The University of Sydney, Sydney, Australia

Synopsis

Keywords: Blood Vessels, Normal development, high-field MRI

Motivation: Neonatal brain hemorrhage, which are observed in premature and even in full-term infants, could cause adverse neurological damage, however, the mechanism of hemorrhages is unknown and the validated information for neonatal hemorrhages, especially in asymptomatic neonates, is lacking.

Goal(s): Our goal was to detect hemorrhages in the brains of untreated postnatal mice and evaluate the spatiotemporal information.

Approach: T2*-weighted MR images were obtained from records of C57BL/6J mice at P0-1 and acquired hemorrhages were cross-validated by histological analysis.

Results: We found that hemorrhages occur throughout the brain of healthy neonatal mice.

Impact: In vivo MRI of untreated postnatal mice may serve as a useful tool to further investigate asymptomatic hemorrhages in full-term infants and will deepen our understanding of not only the mechanism of neonatal hemorrhages but also the brain development.

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