Table 1.
(a) Results from computerized axon identification (Algorithm) vs. manual axon identification (Human Expert 1 and 2) in white and gray matter regions, and (b) comparison between computerized axon identification (Algorithm) vs. manual axon identification (Human Expert 1) in regions of the posterior funiculus in Slices 1 and 2, and the anterior funiculus in Slices 1 and 4. The locations of the regions on the axon density maps are shown in Fig. 3.
| (a) Axon Identification: Algorithm vs. Two Human Experts for One Slice | |||
|---|---|---|---|
| Axon Count | |||
| Algorithm | Human Expert 1 | Human Expert 2 | |
| Total | Total (% thereof selected by algorithm) | ||
| White Matter (0.215 mm2 aggregate area) | |||
| Slice 2 | 3739 | 3470 (91%) | 3503 (95%) |
| Gray Matter (0.215 mm2 aggregate area) | |||
| Slice 2 | 1662 | 464 (84%) | 515 (86%) |
| (b) Axon Identification: Algorithm vs. one Human Expert for Multiple Slices | |||
|---|---|---|---|
| Axon Count | |||
| Algorithm | Human Expert 1 | - | |
| Total | Total (% thereof selected by algorithm) | ||
| Posterior Funiculus (0.88 mm2) | |||
| Slice 1 | 13,909 | 13,801 (84%) | - |
| Slice 2 | 14,191 | 13,416 (93%) | - |
| Anterior Funiculus (0.10 mm2 aggregate area) | |||
| Slice 1 | 1,811 | 1,514 (78%) | - |
| Slice 4 | 2,610 | 2,466 (81%) | - |