Integrated local correlation: A new measure of local coherence in fMRI data (bibtex)
by G. Deshpande, S. LaConte, S. Peltier, X. Hu
Abstract:
We introduce the measure of integrated local correlation (ILC) for characterizing local coherence in the brain using fMRI data. The coupling of local neuronal processes influences coherence in a voxel’s neighborhood. Unlike existing methods of local coherence such as regional homogeneity, ILC takes into account the inherent correlation in the data, does not require the specification of a neighborhood and, as demonstrated by experimental data, is effectively independent of image resolution. Respiratory and cardiac fluctuations do not considerably alter ILC except in isolated areas in and surrounding large vessels. With resting-state fMRI data, ILC was demonstrated to be tissue-specific, higher in gray matter than white matter, and reproducible across consecutive runs in healthy individuals.
Reference:
abstract G. Deshpande, S. LaConte, S. Peltier, X. Hu. Integrated local correlation: A new measure of local coherence in fMRI data. In Proceedings 15th Scientific Meeting, International Society for Magnetic Resonance in Medicine, Berlin, page 3480, 2007. [bibtex]
Bibtex Entry:
@inproceedings{Berlin3480,
   Author = {Deshpande, G. and LaConte, S. and Peltier, S. and Hu, X.},
   Title ={Integrated local correlation: A new measure of local coherence in f{M}{R}{I} data},
   BookTitle = {Proceedings 15th Scientific Meeting, International Society for Magnetic Resonance in Medicine, Berlin},
   Pages = {3480},
   Abstract = {We introduce the measure of integrated local correlation (ILC) for characterizing local coherence in the brain using fMRI data. The coupling of local neuronal processes influences coherence in a voxel’s neighborhood. Unlike existing methods of local coherence such as regional homogeneity, ILC takes into account the inherent correlation in the data, does not require the specification of a neighborhood and, as demonstrated by experimental data, is effectively independent of image resolution. Respiratory and cardiac fluctuations do not considerably alter ILC except in isolated areas in and surrounding large vessels. With resting-state fMRI data, ILC was demonstrated to be tissue-specific, higher in gray matter than white matter, and reproducible across consecutive runs in healthy individuals.},
 Keywords = {Berlin3480},
   Year = {2007} }
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