Table 4.
Summary statistics of voxel-wise comparison of ST/DTI sheetlet normal to FI
| # a | STW/DTW | CMR | n-dir | b-value (s/mm 2 ) | |∠[v 3 ST or e 3 DTI ]n FI | median ± I.Q.R. (°) |
|---|---|---|---|---|---|
| LATERAL ROI | |||||
| First ST and DTI parameter sets | |||||
| 8 | 3/3 | T1W | NA | NA | 8.7 ± 7.8 |
| 1 | NA | DTI | 6 | 1000 | 22.5 ± 13.8 |
| Second ST and DTI parameter sets | |||||
| 8 | 5/5 | T1W | NA | NA | 9.1 ± 7.4 |
| 2 | NA | DTI | 12 | 1000 | 24.1 ± 11.9 |
| SEPTAL ROI | |||||
| First ST and DTI parameter sets | |||||
| 8 | 3/3 | T1W | NA | NA | 7.4 ± 8.7 |
| 1 | NA | DTI | 6 | 1000 | 54.4 ± 47.3 |
| Second ST and DTI parameter sets | |||||
| 8 | 5/5 | T1W | NA | NA | 8.5 ± 9.7 |
| 2 | NA | DTI | 12 | 1000 | 60.5 ± 53.4 |
These statistics relate to the histograms in Figure 7 of the voxel-wise comparison of ST and DTI determined sheetlet putative normal orientations to the FI normal for the lateral ROI (left) and for the septal ROI (right). ; a – scan # as defined in Table 1; NA: Not Applicable; FLASH: fast low angle shot; ST: structure tensor of FLASH data; DTI: diffusion tensor magnetic resonance imaging; T1W is T1-weighted FLASH; n-dir: number of diffusion directions; ROI: region(s) of interest. FI: FLASH isosurface data; DTW: derivative template width STW: smoothing template width. The symbols for vectors and derived angles are defined in Table 2.