Table 3.
Comparison of the effects of FIX denoising on t-statistics from the GLM output and significantly active voxel counts for all 15 subjects. T-statistics: using FIX denoising resulted in an increase in the mean t-statistic in all grey matter ROIs (maximum t-statistic in parentheses). * = ROIs in which FIX denoising resulted in statistically significant increases in t-statistics (voxel-based thresholding, 5% FWER corrected). # active voxels: using FIX denoising also resulted in an increase in the number of significantly active voxels using all three thresholding approaches. Voxel is FDR corrected; cluster and TFCE are FWER corrected. ACC = anterior cingulate cortex; PoCG = postcentral gyrus; TFCE = threshold free cluster enhancement.
| No FIX | With FIX | ||
|---|---|---|---|
| T-statistics | ACC | 2.065 (4.822) | 2.104 (4.030) |
| Insula | 2.199 (4.839) | 2.977* (5.224) | |
| PoCG | 2.249 (5.329) | 2.959* (6.987) | |
| Thalamus | 1.527 (7.387) | 2.565* (6.797) | |
| # active voxels | Voxel | 0 | 66,984 |
| Cluster | 30,837 | 82,837 | |
| TFCE | 1311 | 66,756 | |