Table 3. Within-subject standard deviation (SDw) and repeatability index (RI) for fitted values of cerebral blood flow (CBF), microvascular volume fraction (v bw), and permeability-surface product (PS).
| CBF (mL per 100 g per minute) | vbw (mL blood/100 g tissue) | PS (mL per 100 g per minute) | ||||
|---|---|---|---|---|---|---|
|
FWHM (mm) |
SDw |
RI (%) |
SDw |
RI (%) |
SDw |
RI (%) |
| 0 | 22.6 | 62.2 | 1.17 | 65.2 | 31.7 | 70.8 |
| 2 | 17.4 | 47.9 | 0.85 | 51.2 | 17.0 | 38.7 |
| 4 | 13.0 | 32.5 | 0.60 | 35.7 | 10.7 | 22.4 |
| 6 | 10.3 | 24.7 | 0.46 | 27.3 | 7.9 | 15.9 |
FWHM, full width at half maximum.
All values represent mean value per voxel, in the gray matter, after registration into standard space.