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. 2012 Aug 30;70(2):358–369. doi: 10.1002/mrm.24467

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© 2012 Wiley Periodicals, Inc.

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Fig 10 — Comparison of FA difference maps obtained from either of the extended tensor models (ii)–(v) with the FA difference obtained from the robust fitting model (vi). For this purpose, the normalized cross-correlation (ncFA^(m), Eq. [12]) between ΔFA^(vi) and ΔFA^(m) [m = (ii)–(v)] was calculated for the DTI_n (top row) and DTI_g (bottom row) data within the brainstem ROI shown in Figure 1. A slight correlation between the extended tensor model and robust fitting was observed for the nongated data when the extended tensor models with nonlinear regressors [(iv) and (v)] were used. Correlations were not observed for the gated data.