作者
Padmavathi Sundaram, Martin Luessi, Marta Bianciardi, Steven Stufflebeam, Matti Hämäläinen, Victor Solo
发表日期
2019/12/26
期刊
IEEE transactions on medical imaging
卷号
39
期号
6
页码范围
1957-1966
出版商
IEEE
简介
Individual-level resting-state networks (RSNs) based on resting-state fMRI (rs-fMRI) are of great interest due to evidence that network dysfunction may underlie some diseases. Most current rs-fMRI analyses use linear correlation. Since correlation is a bivariate measure of association, it discards most of the information contained in the spatial variation of the thousands of hemodynamic signals within the voxels in a given brain region. Subject-specific functional RSNs using typical rs-fMRI data, are therefore dominated by indirect connections and loss of spatial information and can only deliver reliable connectivity after group averaging. While bivariate partial correlation can rule out indirect connections, it results in connectivity that is too sparse due to lack of sensitivity. We have developed a method that uses all the spatial variation information in a given parcel by employing a multivariate information-theoretic …
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