Localized diffusion magnetic resonance micro-imaging of the live mouse brain.

Abstract:

:High-resolution diffusion MRI (dMRI) is useful for resolving complex microstructures in the mouse brain, but technically challenging for in vivo studies due to the long scan time. In this study, selective excitation and a three-dimensional fast imaging sequence were used to achieve in vivo high-resolution dMRI of the mouse brain at 11.7Tesla. By reducing the field of view using spatially selective radio frequency pulses, we were able to focus on targeted brain structures and acquire high angular resolution diffusion imaging (HARDI) data at an isotropic resolution of 0.1mm and 30 diffusion encoding directions in approximately 1h. We investigated the complex tissue microstructures of the mouse hippocampus, cerebellum, and several cortical areas using this localized dMRI approach, and compared the results with histological sections stained with several axonal and dendritic markers. In the mouse visual cortex, the results showed predominately radially arranged structures in an outer layer and tangentially arranged structures in an inner layer, similar to observations from postmortem human brain specimens.

journal_name

Neuroimage

journal_title

NeuroImage

authors

Wu D,Reisinger D,Xu J,Fatemi SA,van Zijl PC,Mori S,Zhang J

doi

10.1016/j.neuroimage.2014.01.014

subject

Has Abstract

pub_date

2014-05-01 00:00:00

pages

12-20

eissn

1053-8119

issn

1095-9572

pii

S1053-8119(14)00025-1

journal_volume

91

pub_type

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