Cited by 324Advanced Neuroimaging Techniques and ApplicationsFunctional Brain Connectivity StudiesMedical Image Segmentation Techniques

Towards quantitative connectivity analysis: reducing tractography biases

Girard, Gabriel, Whittingstall, Kevin, Deriche, Rachid, Descoteaux, Maxime·2014·NeuroImage

Abstract

Diffusion MRI tractography is often used to estimate structural connections between brain areas and there is a fast-growing interest in quantifying these connections based on their position, shape, size and length. However, a portion of the connections reconstructed with tractography is biased by their position, shape, size and length. Thus, connections reconstructed are not equally distributed in all white matter bundles. Quantitative measures of connectivity based on the streamline distribution in the brain such as streamline count (density), average length and spatial extent (volume) are biased by erroneous streamlines produced by tractography algorithms. In this paper, solutions are proposed to reduce biases in the streamline distribution. First, we propose to optimize tractography parameters in terms of connectivity. Then, we propose to relax the tractography stopping criterion with a novel probabilistic stopping criterion and a particle filtering method, both based on tissue partial volume estimation maps calculated from a T1-weighted image. We show that optimizing tractography parameters, stopping and seeding strategies can reduce the biases in position, shape, size and length of the streamline distribution. These tractography biases are quantitatively reported using in-vivo and synthetic data. This is a critical step towards producing tractography results for quantitative structural connectivity analysis.

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Crossref · 10.1016/j.neuroimage.2014.04.074

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  • Seeding only from gray matter avoids known tract-length connectivity biases.

    “For the data used in this study, we took the approach of seeding only from the gray matter to avoid known tract-length connectivity biases (Girard et al., 2014; Jeurissen et al., 2019), and normalized the streamline counts by the volumes of each node-pair in order to better match the normalized connection density metric used in the Knox et al. model.”

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Authors
Girard, G., Whittingstall, K., Deriche, R., & Descoteaux, M.
Affiliations
  • Institut national de recherche en sciences et technologies du numérique (FR)
  • Université de Sherbrooke (CA)
Corresponding author
Girard, Gabriel
Venue
NeuroImage
Publisher
Elsevier BV
Published
2014-09
Volume
98
Pages
266-278
ISSN
1053-8119 (ISSN-L)
OpenAlex
W1969637629
Cited by
324
References
52
Citations by year
2026: 20 · 2025: 33 · 2024: 28 · 2023: 27 · 2022: 28 · 2021: 36 · 2020: 31 · 2019: 31 · 2018: 26 · 2017: 30 · 2016: 15 · 2015: 17 · 2014: 2
FWCI
16.66
Type
journal article
Language
en
Open access
closed
Locations
  • NeuroImage (publishedVersion)
  • PubMed (publishedVersion)
  • HAL (submittedVersion)
Topics
  • Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Advanced Neuroimaging Techniques and Applications
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Functional Brain Connectivity Studies
  • Physical Sciences › Computer Science › Computer Vision and Pattern Recognition › Medical Image Segmentation Techniques
Keywords
diffusion MRI tractography, streamline distribution, particle filter, seeding strategies, white matter bundles
MeSH terms
Algorithms, Brain, Brain Mapping, Humans, Image Interpretation, Computer-Assisted, Artifacts, Diffusion Magnetic Resonance Imaging, White Matter, Gray Matter

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