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Research ArticleFunctional
Open Access

Investigation of Long-Term Reproducibility of Intrinsic Connectivity Network Mapping: A Resting-State fMRI Study

Y.-h. Chou, L.P. Panych, C.C. Dickey, J.R. Petrella and N.-k. Chen
American Journal of Neuroradiology May 2012, 33 (5) 833-838; DOI: https://doi.org/10.3174/ajnr.A2894
Y.-h. Chou
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L.P. Panych
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C.C. Dickey
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J.R. Petrella
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N.-k. Chen
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    Fig 1.

    A, Seed regions of the DMN. B, Interregional correlation coefficients and ICCs among the 16 regions of the DMN. In this 16 × 16 square matrix, the x- and y-axes represent the 16 regions of the DMN, and each matrix element indicates the functional connectivity strength between a pair of listed brain regions. Four different background colors are used to indicate different levels of reproducibility.

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    Fig 2.

    Within-subject test-retest reproducibility (A) and between-subject reproducibility (B) of the inter-regional correlation coefficients among the 116 regions of the whole brain. In this 116 × 116 square matrix, the x- and y-axes represent the 116 regions of the whole brain listed in On-line Table 1, and each matrix element indicates the link between a pair of listed brain regions. For example, the element marked by a red circle (ie, x = 31, y = 68) represents a link between the left anterior cingulate gyrus and the right precuneus. A, Each matrix element shows the level of within-subject reproducibility, measured by the ICC, of an inter-regional link. Note that >78% of the elements have outstanding or substantial within-subject test-retest reproducibility. B, Each element shows the level of between-subject reproducibility, measured by the COV. Less than 14% of the elements have acceptable between-subject reproducibility.

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    Table 1:

    Statistics of reproducibility of functional connectivity in the DMN

    Reproducibility% of ElementsMean (SD)95% Confidence Interval
    Outstanding (ICC ≥ 0.8)53/120 (44.17%)0.87 (0.04)0.69–0.98
    Substantial (0.8 > ICC ≥ 0.6)34/120 (28.34%)0.71 (0.05)0.44–0.94
    Moderate (0.6 > ICC ≥ 0.4)18/120 (15.01%)0.51 (0.05)0.22–0.88
    Poor (ICC < 0.4)15/120 (12.49%)0.20 (0.10)0.01–0.68
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    Table 2:

    Statistics of reproducibility of functional connectivity for the whole brain

    Reproducibility% of ElementsMean (SD)95% Confidence Interval
    Outstanding (ICC ≥ 0.8)2864/6670 (42.94%)0.87 (0.04)0.69–0.98
    Substantial (0.8 > ICC ≥ 0.6)2400/6670 (35.98%)0.72 (0.05)0.45–0.94
    Moderate (0.6 > ICC ≥ 0.4)729/6670 (10.93%)0.52 (0.06)0.23–0.88
    Poor (ICC < 0.4)677/6670 (10.15%)0.24 (0.12)0.03–0.72
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American Journal of Neuroradiology: 33 (5)
American Journal of Neuroradiology
Vol. 33, Issue 5
1 May 2012
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Investigation of Long-Term Reproducibility of Intrinsic Connectivity Network Mapping: A Resting-State fMRI Study
Y.-h. Chou, L.P. Panych, C.C. Dickey, J.R. Petrella, N.-k. Chen
American Journal of Neuroradiology May 2012, 33 (5) 833-838; DOI: 10.3174/ajnr.A2894

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Investigation of Long-Term Reproducibility of Intrinsic Connectivity Network Mapping: A Resting-State fMRI Study
Y.-h. Chou, L.P. Panych, C.C. Dickey, J.R. Petrella, N.-k. Chen
American Journal of Neuroradiology May 2012, 33 (5) 833-838; DOI: 10.3174/ajnr.A2894
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