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Abstract #1355

Towards a multi-parametric MRI-based myelin marker for detecting enhanced myelination in the Gli1-/- mouse brain

Choong Heon Lee1, Mara Holloman2, Jacob Brady3, James L. Salzer2, and Jiangyang Zhang1
1Bernard and Irene Schwartz Center for Biomedical Imaging, Department of Radiology, New York University School of Medicine, New York, NY, United States, 2Department of Neuroscience and Physiology, Neuroscience Institute, New York University School of Medicine, New York, NY, United States, 3UConn Health, Farmington, CT, United States

Synopsis

Keywords: Multi-Contrast, MicrostructureAlthough multiple MRI-based myelin marker have been introduced, their sensitivity and specificity remained limited. Multi-parametric MRI can potentially enhance myelin mapping, but validation remains challenging. In this study, we compared myelin histology from the Gli1-/- mouse brain, which has enhanced myelination, with MRI markers based on relaxation, magnetization transfer, and diffusion properties from the same animals. We found varying degrees of correlation between MRI markers and myelin basic protein signals in multiple brain regions. Partial least square regression analysis demonstrated that multi-parametric MRI can indeed improve myelin mapping and provided information for further optimization.

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Keywords