Cited by 1,770Functional Brain Connectivity StudiesAdvanced MRI Techniques and ApplicationsBlind Source Separation Techniques

Automatic denoising of functional MRI data: Combining independent component analysis and hierarchical fusion of classifiers

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Salimi-Khorshidi, Gholamreza, Douaud, Gwenaëlle, Beckmann, Christian F., Glasser, Matthew F., Griffanti, Ludovica, Smith, Stephen M.·2014·NeuroImage

Abstract

Many sources of fluctuation contribute to the fMRI signal, and this makes identifying the effects that are truly related to the underlying neuronal activity difficult. Independent component analysis (ICA) - one of the most widely used techniques for the exploratory analysis of fMRI data - has shown to be a powerful technique in identifying various sources of neuronally-related and artefactual fluctuation in fMRI data (both with the application of external stimuli and with the subject "at rest"). ICA decomposes fMRI data into patterns of activity (a set of spatial maps and their corresponding time series) that are statistically independent and add linearly to explain voxel-wise time series. Given the set of ICA components, if the components representing "signal" (brain activity) can be distinguished form the "noise" components (effects of motion, non-neuronal physiology, scanner artefacts and other nuisance sources), the latter can then be removed from the data, providing an effective cleanup of structured noise. Manual classification of components is labour intensive and requires expertise; hence, a fully automatic noise detection algorithm that can reliably detect various types of noise sources (in both task and resting fMRI) is desirable. In this paper, we introduce FIX ("FMRIB's ICA-based X-noiseifier"), which provides an automatic solution for denoising fMRI data via accurate classification of ICA components. For each ICA component FIX generates a large number of distinct spatial and temporal features, each describing a different aspect of the data (e.g., what proportion of temporal fluctuations are at high frequencies). The set of features is then fed into a multi-level classifier (built around several different classifiers). Once trained through the hand-classification of a sufficient number of training datasets, the classifier can then automatically classify new datasets. The noise components can then be subtracted from (or regressed out of) the original data, to provide automated cleanup. On conventional resting-state fMRI (rfMRI) single-run datasets, FIX achieved about 95% overall accuracy. On high-quality rfMRI data from the Human Connectome Project, FIX achieves over 99% classification accuracy, and as a result is being used in the default rfMRI processing pipeline for generating HCP connectomes. FIX is publicly available as a plugin for FSL.

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Crossref · 10.1016/j.neuroimage.2013.11.046

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  • Each of four 15-min resting state runs for each subject was cleaned (denoised) using 24-parameter motion regression followed by ICA+FIX denoising.

    “Each of four 15-min resting state runs for each subject in the group was cleaned (denoised) using 24-parameter motion regression followed by ICA+FIX denoising30, 48.”

    From Canonical genetic signatures of the adult human brain (2015) · cites this paper as [48]

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  1. Caputo B Sim K Furesjo F Smola A Appearance-based Object Recognition using SVMs: Which Kernel Should I Use Proc of NIPS workshop on Statitsical methods for computational experiments in visual processing and computer vision 2002

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Authors
Salimi-Khorshidi, G., Douaud, G., Beckmann, C. F., Glasser, M. F., Griffanti, L., & Smith, S. M.
Affiliations
  • University of Oxford (GB)
  • Radboud University Nijmegen (NL)
  • Washington University in St. Louis (US)
Venue
NeuroImage
Publisher
Elsevier BV
Published
2014-04
Volume
90
Pages
449-468
ISSN
1053-8119 (ISSN-L)
OpenAlex
W2157446241
Cited by
1,770
References
38
Citations by year
2026: 101 · 2025: 160 · 2024: 171 · 2023: 159 · 2022: 203 · 2021: 193 · 2020: 178 · 2019: 146 · 2018: 151 · 2017: 122 · 2016: 98 · 2015: 69 · 2014: 17 · 2013: 1
FWCI
56.88
Type
journal article
Language
en
Open access
Locations
  • NeuroImage (publishedVersion)
  • PubMed (publishedVersion)
  • University of Twente Research Information (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
  • Virtual Community of Pathological Anatomy (University of Castilla La Mancha) (submittedVersion, other-oa)
  • Radboud Repository (Radboud University) (submittedVersion)
  • University of Twente Research Information (submittedVersion)
Funders
  • NIH (1U54MH091657-01, P30-NS057091, P41-RR08079/EB015894, F30-MH097312)
  • UK Medical Research Council (MR/K006673/1)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Functional Brain Connectivity Studies
  • Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Advanced MRI Techniques and Applications
  • Physical Sciences › Computer Science › Signal Processing › Blind Source Separation Techniques
Keywords
fMRI denoising, independent component analysis, resting-state fMRI, motion artifacts, Human Connectome Project
MeSH terms
Algorithms, Brain, Brain Mapping, Humans, Image Processing, Computer-Assisted, Magnetic Resonance Imaging, Artifacts, Principal Component Analysis

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