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《Radiologic Practice》 2018-04
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Group-level properties of a recently developed resting-state fMRI technique,functional correlation tensor

XU Liang-zhou;HE Meng-yin;DENG Xun-wei;Department of Radiology,Wuhan Traditional Hospital;  
Objective:To investigate the group level tensorial properties of functional correlation tensor.Methods:Resting-state fMRI data of thirty-four healthy volunteers were acquired in this study.Typical pre-processing steps were conducted.Then,the voxel-wise functional correlation tensor was constructed.Tensorial indices such as FA and trace were computed for each subject and then group averaged.Furthermore,two resting-state fMRI datasets were recruited from the 1000 Connectome Project website(https://www.nitrc.org/projects/fcon_1000/),the same postprocessing was perfomed,and the values of FA and trace in the three groups were compared statistically.Results:The groupaveraged FA map of functional correlation tensor showed high contrast between grey matter and white matter,and was very similar to that of DTI.Interestingly,relative high values was found in some areas related to default mode network on the group-averaged trace map.Significant correlation exsited between the values of group-averaged trace and ReHo(r=0.912,P0.001),and significant correlation was also found between each group-averaged trace and the means of trace of all subjects from the three datasets(all r0.9 and P0.001).Conclusion:The group-level functional correlation tensor imaging(FA,Trace and ReHo map)can reflect both functional and structural features of human brain.It may play important role in investigating the relationship between function and structure of human brain.
【CateGory Index】: R445.2
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