Table III.
Volume data (Mean, SD) for each of the ROI measured at each site in the five subjects, and using T1 and T2 tissue segmentation
| GE_1 | GE_2 | PHILIPS | SIEMENS_1 | SIEMENS_2 | Intersite CV | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Mean | SD | Mean | SD | Mean | SD | Mean | SD | Mean | SD | ||
| Frontal (cc) | 308.5 | 24.1 | 311.6 | 25.1 | 301.9 | 21.5 | 322.7 | 25.3 | 326.6 | 22.9 | |
| GM (%) | 42.0 | 2.1 | 41.5 | 1.9 | 42.5 | 1.8 | 41.5 | 1.0 | 42.9 | 1.7 | 2.2 |
| WM (%) | 32.8 | 1.9 | 32.8 | 2.5 | 33.5 | 2.5 | 35.2 | 2.7 | 32.9 | 2.1 | 5.4 |
| CSF (%) | 22.6 | 2.0 | 23.1 | 3.1 | 21.4 | 2.7 | 21.1 | 2.9 | 22.4 | 2.6 | 7.0 |
| Temporal (cc) | 236.9 | 21.9 | 241.4 | 23.7 | 240.7 | 20.3 | 240.4 | 15.6 | 239.9 | 21.4 | |
| GM (%) | 60.8 | 1.7 | 58.7 | 1.5 | 59.8 | 0.8 | 60.3 | 1.0 | 59.8 | 1.5 | 2.0 |
| WM (%) | 24.6 | 0.9 | 25.9 | 1.0 | 26.7 | 1.0 | 25.9 | 1.8 | 26.9 | 2.0 | 4.9 |
| CSF (%) | 14.6 | 1.0 | 15.4 | 1.4 | 13.5 | 0.8 | 13.8 | 2.0 | 13.3 | 1.3 | 8.3 |
| Parietal (cc) | 271.7 | 20.4 | 274.6 | 21.4 | 271.6 | 13.9 | 280.8 | 17.6 | 287.6 | 20.0 | |
| GM (%) | 38.5 | 3.9 | 39.0 | 2.3 | 37.7 | 1.3 | 38.5 | 1.5 | 40.3 | 2.1 | 4.3 |
| WM (%)a | 40.9 | 3.0 | 39.1 | 2.6 | 42.0 | 2.4 | 42.1 | 2.9 | 35.9 | 2.1 | 7.2 |
| CSF (%) | 19.2 | 3.0 | 20.5 | 3.7 | 18.9 | 2.0 | 18.1 | 2.6 | 22.6 | 2.6 | 10.1 |
| Occipital (cc) | 124.2 | 8.0 | 125.4 | 6.9 | 129.3 | 6.6 | 132.7 | 9.9 | 132.3 | 7.3 | |
| GM (%) | 52.9 | 5.4 | 53.3 | 3.0 | 50.7 | 1.5 | 51.7 | 1.7 | 54.3 | 3.6 | 5.7 |
| WM (%)a | 33.5 | 3.9 | 32.2 | 1.5 | 36.9 | 1.6 | 35.6 | 2.0 | 28.6 | 4.4 | 11.7 |
| CSF (%) | 13.6 | 3.6 | 14.5 | 3.9 | 12.4 | 1.7 | 12.7 | 2.5 | 17.1 | 4.3 | 17.3 |
Intersite CV: average of within subject coefficients of variation between scanners (see Methods).
ROIs were measured bilaterally, adding right and left values.
a
ROIs showing significant intersite differences in an ANOVA (P < 0.05). If the ANOVA was significant, the pair of extreme values showing significant differences is boldfaced (P < 0.05; Sidak test).