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Automated detection of datasets with artefactual signal in large n studies using Shannon entropy

The recent public release of more than 1200 resting state BOLD MRI (R-fMRI) datasets as part of the 1000 Functional Connectomes Project (Biswal, 2010) provides the community with the opportunity to apply and test analysis techniques on a much larger number of subjects than may be available locally. With the potential to examine data from many sources comes the issue of how the characteristics of this data vary between site, and also between studies at the same site.