2. ICA
The Independent Component Analysis (ICA) is a computational method
for separating a multivariate signal into additive subcomponents.
There are different approaches to implement ICA:
Infomax maximum likelihood
FastICA maximizes nongaussianity
JADE joint diagonalization
EVD second order correlation
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3. Execution time: related to a Pentium 4, 1.6-GHz, 512 GB, Windows XP computer using MATLAB version 7.0.
Nicolle Correa, Tu ̈lay Adali, and Vince D Calhoun. Performance of blind source separation algorithms for fMRI analysis using a group ICA method.
Magnetic resonance imaging, 25(5):684–94, jun 2007.
Algorithms
Spatial
Maps
Accuracy
Time
Courses
Accuracy
Parameters
Settings
Execution
Time [s]
Infomax 70
FastICA 38
JADE 62
EVD 3
ICA Algorithms
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9. FastBRaIn
Thank you for your attention
FastBrainatNECST
FastBRaIn_NECST
Valentina Corbetta: valentina.corbetta@mail.polimi.it
Giada Casagrande: giada.casagrande@mail.polimi.it
Filippo Carloni: filippo.carloni@mail.polimi.it
Editor's Notes
FastICA the best overall performance
Iterative algorithm
Maximize non-Gaussianity of estimated sources
Easy to use: requires initialization and setting of
a limited number of parameters
Independent components estimated individually
FSL is a comprehensive library of analysis tools for fMRI, MRI and DTI. It runs on Apple and PCs
Gift is a MATLAB toolbox. It implements different algorithms for ICA applied to the analysis of fMRI