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Independent component analysis of fMRI data: a model based approach for artifacts separation

Vanello, Nicola and Positano, Vincenzo and Ricciardi, Emiliano and Santarelli, Maria Filomena and Guazzelli, Mario and Pietrini, Pietro and Landini, Luigi Independent component analysis of fMRI data: a model based approach for artifacts separation. In: First International IEEE EMBS Conference on Neural Engineering, May 20-22, 2003, Capri, Italy pp. 529-532. ISBN 0-7803-7579-3. (2003)

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Independent component analysis applied to functional magnetic resonance imaging is a promising technique for non invasive study of brain function. We examine the behavior of spatial ICA decomposition applying ICA to simulated data sets. We study the ICA performances in presence of movement correlated and uncorrelated with activation task, also taking into account the presence of rician distributed noise. We show that the presence of image artifacts due to simulated subject movement and MRI noise greatly affects the method ability to reveal the activation, especially in the presence of movement correlated with activation task. Spatial smoothing of data, before ICA, seems to overcome this problem, allowing us to retrieve the original sources also in the presence of both correlated movement and high noise level.

Item Type: Conference or Workshop Item (Paper)
Identification Number: 10.1109/CNE.2003.1196880
Uncontrolled Keywords: biomedical MRI; brain; independent component analysis; noise; FastICA; correlated movement; fMRI data; fMRI simulation; functional magnetic resonance imaging; high noise level; image artifacts; model based approach; non invasive study; rician distributed noise; simulated data sets; simulated subject movement; spatial ICA decomposition; spatial data smoothing; Blood; Brain modeling; Data analysis; Gaussian noise; Heart beat; Magnetic resonance imaging; Physiology
Subjects: R Medicine > RC Internal medicine > RC0321 Neuroscience. Biological psychiatry. Neuropsychiatry
Research Area: Computer Science and Applications
Depositing User: Caterina Tangheroni
Date Deposited: 23 Mar 2016 13:07
Last Modified: 13 Sep 2016 10:18
URI: http://eprints.imtlucca.it/id/eprint/3320

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