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Accurate nonlinear mapping between MNI volumetric and FreeSurfer surface coordinate systems
Jianxiao Wu1, Gia H Ngo1, Douglas Greve2,3
1Department of Electrical and Computer Engineering, ASTAR-NUS Clinical Imaging Research Centre, Singapore Institute for Neurotechnology and Memory Networks Program, National University of Singapore, Singapore City, Singapore.
Human Brain Mapping
|May 18, 2018
Summary
Mapping neuroimaging data between volumetric (MNI152) and surface (fsaverage) systems is crucial. Registration fusion with Advanced Normalization Tools (RF-ANTs) offers the best performance for these cross-coordinate system projections.
Area of Science:
- Neuroimaging
- Computational Neuroscience
- Medical Image Analysis
Background:
- Neuroimaging studies commonly report results in volumetric (e.g., MNI152) or surface (e.g., fsaverage) coordinate systems.
- Accurate mapping between these systems is essential for applications like projecting fMRI group analyses or resting-state fMRI parcellations.
Purpose of the Study:
- To evaluate and compare different approaches for mapping neuroimaging data between MNI152/Colin27 and fsaverage coordinate systems.
- To identify the most effective method for projecting data and parcellations across these common neuroimaging spaces.
Main Methods:
- Simulated projection of group-average data from MNI152/Colin27 to fsaverage.
- Simulated projection of fsaverage parcellations to MNI152/Colin27.
- Evaluated three mapping approaches: two commonly used methods and a registration fusion (RF) approach with two implementations (one using Advanced Normalization Tools - ANTs).
Main Results:
- The registration fusion approach utilizing ANTs (RF-ANTs) demonstrated superior performance in mapping data between fsaverage and MNI152/Colin27.
- RF-ANTs maintained high accuracy even when new subjects were registered using different software (FSL FNIRT).
Conclusions:
- Registration fusion with ANTs (RF-ANTs) is recommended as the most effective method for mapping neuroimaging data between MNI152/Colin27 and fsaverage coordinate systems.
- Direct registration of individual subjects to the target coordinate system is optimal; cross-system mapping should be used only when direct registration is not feasible.
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