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    Higher diffusion-weighted magnetic resonance imaging voxel resolution improves brain connectome results. For robust tractography and connectomes, researchers recommend resampling data to 1 mm isotropic resolution.

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    Area of Science:

    • Neuroimaging
    • Computational Neuroscience
    • Biomedical Engineering

    Background:

    • Diffusion-weighted magnetic resonance imaging (dMRI) is crucial for mapping brain connectivity.
    • Previous studies have not comprehensively evaluated voxel resolution's impact on dMRI-derived connectomes.
    • High-resolution data is essential for accurate brain network analysis.

    Purpose of the Study:

    • To investigate how varying voxel resolutions in dMRI affect brain connectome reconstruction.
    • To determine the optimal resolution for reliable tractography and connectome analysis.
    • To provide guidelines for processing high-resolution dMRI data.

    Main Methods:

    • dMRI data from high-resolution subjects were analyzed.
    • Data were systematically down-sampled to various lower resolutions.
    • Connectome similarity was assessed across different resolutions.
    • Tractography algorithms were applied to evaluate robustness.

    Main Results:

    • Connectome similarity consistently improved with higher voxel resolutions.
    • Even after initial down-sampling, higher resolutions yielded more similar results.
    • The study identified a critical resolution threshold for robust outcomes.

    Conclusions:

    • Voxel resolution significantly impacts dMRI-based connectome accuracy.
    • Achieving 1 mm isotropic resolution is recommended for robust tractography and connectome generation.
    • Standardizing resolution is key for reproducible neuroimaging research.