Fig 6.
Group comparison of tensor-fit error of gated (DTIg) and nongated (DTIn) data using (a) the standard tensor model (i), the extended tensor models (b and c) with linear regressors [model (ii) and (iii)], (d and e) with nonlinear regressors [model (iv) and (v)], and (f) the robust fitting model (vi). To this end, first the mode of the Rician fit of the adjusted rms-tensor-fit error histogram was determined for each subject (see Fig. 5). Then, the median and the standard error of the mean of the modes were calculated. The mode of the Rician fit was most similar between gated and nongated data when the correction model (ii) or (iii) was used (b and c). The mode of the Rician fit was smallest when model (vi) was used for the nongated data (f).