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Updated: Aug 2, 2025
Measuring Connectivity in the Primary Visual Pathway in Human Albinism Using Diffusion Tensor Imaging and Tractography
Published on: August 11, 2016
Towards reliable reconstruction of the mouse brain corticothalamic connectivity using diffusion MRI
Tanzil Mahmud Arefin1, Choong Heon Lee2, Zifei Liang2
1Bernard and Irene Schwartz Center for Biomedical Imaging (CBI), Center for Advanced Imaging Innovation and Research (CAI2R), Department of Radiology, New York University Grossman School of Medicine, 660 First Ave., New York City, NY, United States; Center for Neurotechnology in Mental Health Research, Department of Biomedical Engineering, The Pennsylvania State University, University Park, PA, United States.
Optimizing diffusion MRI tractography pipelines improves mouse brain connectivity mapping. This study presents a novel dMRI atlas and methods for accurate reconstruction of corticothalamic projections.
Area of Science:
- Neuroimaging
- Computational Neuroscience
- Connectomics
Background:
- Diffusion magnetic resonance imaging (dMRI) tractography offers insights into brain circuits but faces limitations in sensitivity and specificity.
- Accurate interpretation of reconstructed neural connections is crucial for understanding neurological diseases and genetic mutations.
Purpose of the Study:
- To optimize imaging and computational pipelines for dMRI tractography in the mouse brain.
- To achieve maximal spatial overlap between tractography and tracer-based axonal projection maps within the corticothalamic network.
Main Methods:
- Development of a dMRI-based atlas of the mouse forebrain using structural labels from the Allen Mouse Brain Atlas (AMBA).
- Reconstruction of mouse brain corticothalamic structural connectivity matrices using varying imaging and tractography parameters.
- Quantification of similarities between tractography and Allen Mouse Brain Connectivity Atlas (AMBCA) tracer data to assess parameter effects.
Main Results:
- Imaging and tractography parameters significantly influence the accuracy of corticothalamic projection reconstruction.
- The developed dMRI atlas aids in investigating macroscopic structural connectivity within the mouse brain.
- Tractography within mouse brain gray matter still presents challenges, necessitating further methodological improvements.
Conclusions:
- Optimized dMRI tractography pipelines and atlases enhance the study of brain connectivity.
- Further advancements in imaging and tractography methods are required for precise gray matter connectivity analysis in mice.
