Cited by 365Advanced MRI Techniques and ApplicationsOptical Imaging and Spectroscopy TechniquesAdvanced Neuroimaging Techniques and Applications

How much cortex can a vein drain? Downstream dilution of activation-related cerebral blood oxygenation changes

Turner, R·2002·NeuroImage

Abstract

The draining vein problem is recognized as one of the most severe constraints on the spatial resolution of BOLD contrast fMRI, used widely in imaging neuroscience. Changes in blood oxygenation arising from local brain activity-related changes in blood flow propagate downstream in veins and can give rise to spurious activation at sites remote from neuronal activity. The geometry of the venous vasculature is quite regular in structure and is well depicted in photomicrographs. Quantitative analysis of this geometry, together with hydrodynamic considerations, permit upper bounds dependent on the area of cortical neuronal activity to be derived for the spatial extent of draining vein contamination. It is estimated that an activated cortical area of 100 mm(2) will generate an oxygenation change in venous blood that extends without dilution along the vein no more than 4.2 mm beyond the edge of the activated area. At greater distances along the draining vein this oxygenation change will be diluted. The model leads to a quantitative prediction of the functional form of this dilution.

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Registry

Crossref · 10.1006/nimg.2002.1082

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  • BOLD fMRI is vulnerable to pathology, anesthesia, and vasoactive drugs, while vascular anatomy and delayed hemodynamic responses constrain spatial specificity and temporal resolution.

    “It is also vulnerable to pathology, anesthesia, and vasoactive drugs, while vascular anatomy and delayed hemodynamic responses constrain spatial specificity and temporal resolution (Sirotin & Das, 2009; Turner, 2002).”

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Authors
Turner, R.
Affiliations
National Hospital for Neurology and Neurosurgery (GB)
Corresponding author
Turner, R
Venue
NeuroImage
Publisher
Elsevier BV
Published
2002-08
Volume
16
Issue
4
Pages
1062-1067
ISSN
1053-8119 (ISSN-L)
OpenAlex
W1976642492
Cited by
365
References
14
Citations by year
2026: 9 · 2025: 15 · 2024: 13 · 2023: 19 · 2022: 18 · 2021: 23 · 2020: 10 · 2019: 11 · 2018: 16 · 2017: 24 · 2016: 25 · 2015: 14 · 2014: 26 · 2013: 15 · 2012: 13
FWCI
6.88
Type
journal article
Language
en
Open access
closed
Locations
  • NeuroImage (publishedVersion)
  • PubMed (publishedVersion)
  • UCL Discovery (University College London) (submittedVersion)
  • Max Planck Digital Library (submittedVersion)
  • MPG.PuRe (Max Planck Society) (submittedVersion)
Funders
Wellcome Trust
Topics
  • Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Advanced MRI Techniques and Applications
  • Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Optical Imaging and Spectroscopy Techniques
  • Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Advanced Neuroimaging Techniques and Applications
Keywords
draining veins, venous blood oxygenation, BOLD fMRI, hydrodynamics, spatial resolution, cortical activation, venous contamination
MeSH terms
Cerebral Cortex, Cerebral Veins, Humans, Models, Cardiovascular, Oxygen

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