Cited by 380Advanced Neuroimaging Techniques and ApplicationsFunctional Brain Connectivity StudiesVisual perception and processing mechanisms

Using diffusion tractography to predict cortical connection strength and distance: a quantitative comparison with tracers in the monkey

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Donahue, Chad J., Sotiropoulos, Stamatios N., Jbabdi, Saad, Hernandez-Fernandez, Moises, Behrens, Timothy E., Dyrby, Tim B., Coalson, Timothy, Kennedy, Henry +3 more·2016·The Journal of Neuroscience

Abstract

UNLABELLED: Tractography based on diffusion MRI offers the promise of characterizing many aspects of long-distance connectivity in the brain, but requires quantitative validation to assess its strengths and limitations. Here, we evaluate tractography's ability to estimate the presence and strength of connections between areas of macaque neocortex by comparing its results with published data from retrograde tracer injections. Probabilistic tractography was performed on high-quality postmortem diffusion imaging scans from two Old World monkey brains. Tractography connection weights were estimated using a fractional scaling method based on normalized streamline density. We found a correlation between log-transformed tractography and tracer connection weights of r = 0.59, twice that reported in a recent study on the macaque. Using a novel method to estimate interareal connection lengths from tractography streamlines, we regressed out the distance dependence of connection strength and found that the correlation between tractography and tracers remains positive, albeit substantially reduced. Altogether, these observations provide a valuable, data-driven perspective on both the strengths and limitations of tractography for analyzing interareal corticocortical connectivity in nonhuman primates and a framework for assessing future tractography methodological refinements objectively. SIGNIFICANCE STATEMENT: Tractography based on diffusion MRI has great potential for a variety of applications, including estimation of comprehensive maps of neural connections in the brain ("connectomes"). Here, we describe methods to assess quantitatively tractography's performance in detecting interareal cortical connections and estimating connection strength by comparing it against published results using neuroanatomical tracers. We found the correlation of tractography's estimated connection strengths versus tracer to be twice that of a previous study. Using a novel method for calculating interareal cortical distances, we show that tractography-based estimates of connection strength have useful predictive power beyond just interareal separation. By freely sharing these methods and datasets, we provide a valuable resource for future studies in cortical connectomics.

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Crossref · 10.1523/jneurosci.0493-16.2016

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  • Ex vivo imaging and tracing or physically and numerically simulated phantoms allow validation to some extent, and in specific circumstances such as basic fiber configurations.

    “Ex vivo imaging and tracing17–23 or physically24–30 and numerically simulated phantoms31–34 allow validation to some extent, and in specific circumstances such as basic fiber configurations.”
  • The considerable amount of false positive and false negative connections generated by diffusion-based tractography in rat brain is in line with related studies in macaque brain, mouse brain, and human connectome.

    “The considerable amount of false positive and false negative connections generated by diffusion-based tractography in rat brain is in line with related studies in macaque brain (Thomas et al. 2014; Azadbakht et al. 2015; Donahue et al. 2016), and mouse brain (Calabrese et al. 2015; Chen et al. 2015), and similar findings have been reported for the human connectome (Maier-Hein et al. 2016).”
  • Most neuroanatomical connections are at least to a certain degree bidirectional and contain nested sub-regions with their own connections and corresponding weights.

    “While this was recently done to compare measures of connectivity strength between diffusion tractography and tract tracing data from macaque brain (van den Heuvel et al. 2015; Donahue et al. 2016), most neuroanatomical connections are at least to a certain degree bidirectional and contain nested sub-regions with their own connections and corresponding weights.”
  • In the monkey, whole-brain tract-tracer connection networks and tractography networks show a significant but only moderately high correspondence.

    “In the monkey, whole-brain tract-tracer connection networks and tractography networks demonstrate a significant, but only moderately high correspondence.”
  • The highest reported correlation between monkey tract-tracer and tractography networks is r = 0.59, though it is often much lower.

    “Currently, the highest reported correlation stands at r = 0.59 (Donahue et al., 2016), though it is often much lower (van den Heuvel et al., 2015a).”

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Authors
Donahue, C. J., Sotiropoulos, S. N., Jbabdi, S., Hernandez-Fernandez, M., Behrens, T. E., Dyrby, T. B., Coalson, T., Kennedy, H., Knoblauch, K., Van Essen, D. C., & Glasser, M. F.
Affiliations
  • Washington University in St. Louis (US)
  • University of Oxford (GB)
  • Copenhagen University Hospital (DK)
  • Institut Cellule Souche et Cerveau (FR)
Venue
The Journal of Neuroscience
Published
2016-06-22
Volume
36
Issue
25
Pages
6758-6770
ISSN
  • 0270-6474 (ISSN-L)
  • 1529-2401
OpenAlex
W2463784123
Cited by
380
References
56
Citations by year
2026: 29 · 2025: 40 · 2024: 41 · 2023: 27 · 2022: 32 · 2021: 50 · 2020: 51 · 2019: 32 · 2018: 48 · 2017: 21 · 2016: 9
FWCI
31.81
Type
journal article
Language
en
Open access
Locations
  • Journal of Neuroscience (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Repository@Nottingham (University of Nottingham) (publishedVersion, other-oa)
  • Digital Commons@Becker (Washington University School of Medicine) (submittedVersion)
  • Repository@Nottingham (University of Nottingham) (submittedVersion, cc-by)
  • Nottingham ePrints (University of Nottingham) (submittedVersion)
  • Technical University of Denmark, DTU Orbit (Technical University of Denmark, DTU) (submittedVersion, other-oa)
Funders
  • Wellcome Trust (104765/Z/14/Z)
  • Agence Nationale de la Recherche (ANR-11-BSV4-501, ANR-11-BSV4-0005, ANR-14-CE13-0033, ANR-11-IDEX-0007, ANR-11-IDEX, ANR-15-CE32-0016, ANR-14-CE13-0003, ANR-11-LABX-0042, 11 IDEX - 0007)
  • National Institutes of Health (EP/L023067/1, ANR-11-LABX-0042, P51OD011132)
  • Yerkes National Primate Research Center, Emory University (P51OD11132, /OD P51OD11132)
  • Medical Research Council (MR/L009013/1)
  • Engineering and Physical Sciences Research Council (L023067, EP/L023067, EP/L023067/1)
  • National Institute on Aging (P01AG026423)
  • National Institute of Mental Health (R01MH060974, F30MH097312)
  • Office of Research Infrastructure Programs, National Institutes of Health (ODP51OD11132, P51OD11132)
Topics
  • Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Advanced Neuroimaging Techniques and Applications
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Functional Brain Connectivity Studies
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Visual perception and processing mechanisms
Keywords
diffusion tractography, corticocortical connectivity, connection strength, probabilistic tractography, connectomics, non-human primates
MeSH terms
Animals, Brain Mapping, Cercopithecidae, Cerebral Cortex, Image Processing, Computer-Assisted, Functional Laterality, Models, Neurological, Nerve Fibers, Nerve Net, Diffusion Tensor Imaging, Connectome

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