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Proceedings Paper

A multiscale method for a robust detection of the default mode network
Author(s): Katherine Baquero; Francisco Gómez; Christian Cifuentes; Pieter Guldenmund; Athena Demertzi; Audrey Vanhaudenhuyse; Olivia Gosseries; Jean-Flory Tshibanda; Quentin Noirhomme; Steven Laureys; Andrea Soddu; Eduardo Romero
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Paper Abstract

The Default Mode Network (DMN) is a resting state network widely used for the analysis and diagnosis of mental disorders. It is normally detected in fMRI data, but for its detection in data corrupted by motion artefacts or low neuronal activity, the use of a robust analysis method is mandatory. In fMRI it has been shown that the signal-to-noise ratio (SNR) and the detection sensitivity of neuronal regions is increased with di erent smoothing kernels sizes. Here we propose to use a multiscale decomposition based of a linear scale-space representation for the detection of the DMN. Three main points are proposed in this methodology: rst, the use of fMRI data at di erent smoothing scale-spaces, second, detection of independent neuronal components of the DMN at each scale by using standard preprocessing methods and ICA decomposition at scale-level, and nally, a weighted contribution of each scale by the Goodness of Fit measurement. This method was applied to a group of control subjects and was compared with a standard preprocesing baseline. The detection of the DMN was improved at single subject level and at group level. Based on these results, we suggest to use this methodology to enhance the detection of the DMN in data perturbed with artefacts or applied to subjects with low neuronal activity. Furthermore, the multiscale method could be extended for the detection of other resting state neuronal networks.

Paper Details

Date Published: 19 November 2013
PDF: 8 pages
Proc. SPIE 8922, IX International Seminar on Medical Information Processing and Analysis, 892209 (19 November 2013); doi: 10.1117/12.2035519
Show Author Affiliations
Katherine Baquero, Univ. Nacional de Colombia (Colombia)
Francisco Gómez, Univ. Nacional de Colombia (Colombia)
Christian Cifuentes, Univ. Nacional de Colombia (Colombia)
Pieter Guldenmund, Univ. de Liège and Univ. du Sart-Tilman (Belgium)
Athena Demertzi, Univ. de Liège and Univ. du Sart-Tilman (Belgium)
Audrey Vanhaudenhuyse, Univ. de Liège and Univ. du Sart-Tilman (Belgium)
Olivia Gosseries, Univ. de Liège and Univ. du Sart-Tilman (Belgium)
Jean-Flory Tshibanda, Univ. de Liège (Belgium)
Quentin Noirhomme, Univ. de Liège and Univ. du Sart-Tilman (Belgium)
Steven Laureys, Univ. of Liege and Univ. du Sart-Tilman (Belgium)
Andrea Soddu, Western Univ. (Canada)
Eduardo Romero, Univ. Nacional de Colombia (Colombia)

Published in SPIE Proceedings Vol. 8922:
IX International Seminar on Medical Information Processing and Analysis
Jorge Brieva; Boris Escalante-Ramírez, Editor(s)

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