CONSISTENCY OF INFOMAX ICA DECOMPOSITION OF FUNCTIONAL BRAIN IMAGING DATA
Jeng‐Ren Duann, Tzyy‐Ping Jung, Scott Makeig, Terrence J. Sejnowski · 2003
Ten spatial infomax ICA decompositions were performed on two fMRI data sets collected from the same subject. The maximally-independent spatial components were then tested across decompositions for one-to-one correspondences. Matching independent component maps by mutual information alone proved ineffective. Matching component map pairs by correlating their z-transformed voxel map weights demonstrated that the top 100 components were stably reproduced in each of the ten decompositions. Infomax ICA therefore provided a stable decomposition of fMRI data into spatially independent components. 1.