Super-Resolution Track-Density Imaging Reveals Fine Anatomical Features in Tree Shrew Primary Visual Cortex and Hippocampus.
10.1007/s12264-017-0199-x
- Author:
Jian-Kun DAI
1
;
Shu-Xia WANG
1
;
Dai SHAN
1
;
Hai-Chen NIU
2
;
Hao LEI
3
Author Information
1. National Center for Magnetic Resonance in Wuhan, State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan, 430071, China.
2. Xuzhou Medical University, Xuzhou, 221004, China.
3. National Center for Magnetic Resonance in Wuhan, State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan, 430071, China. leihao@wipm.ac.cn.
- Publication Type:Journal Article
- Keywords:
Diffusion tensor imaging;
Hippocampus;
Primary visual cortex;
Track-density imaging;
Tree shrew
- MeSH:
Animals;
Brain Mapping;
Diffusion Tensor Imaging;
methods;
Hippocampus;
diagnostic imaging;
Image Processing, Computer-Assisted;
methods;
Male;
Neural Pathways;
diagnostic imaging;
Tupaiidae;
anatomy & histology;
Visual Cortex;
diagnostic imaging
- From:
Neuroscience Bulletin
2018;34(3):438-448
- CountryChina
- Language:English
-
Abstract:
Diffusion-weighted magnetic resonance imaging (dMRI) is widely used to study white and gray matter (GM) micro-organization and structural connectivity in the brain. Super-resolution track-density imaging (TDI) is an image reconstruction method for dMRI data, which is capable of providing spatial resolution beyond the acquired data, as well as novel and meaningful anatomical contrast that cannot be obtained with conventional reconstruction methods. TDI has been used to reveal anatomical features in human and animal brains. In this study, we used short track TDI (stTDI), a variation of TDI with enhanced contrast for GM structures, to reconstruct direction-encoded color maps of fixed tree shrew brain. The results were compared with those obtained with the traditional diffusion tensor imaging (DTI) method. We demonstrated that fine microstructures in the tree shrew brain, such as Baillarger bands in the primary visual cortex and the longitudinal component of the mossy fibers within the hippocampal CA3 subfield, were observable with stTDI, but not with DTI reconstructions from the same dMRI data. The possible mechanisms underlying the enhanced GM contrast are discussed.
