Table 2.
rCBFs are calculated by the AIFs determined by the manual ROI (Manu-roi) and ICA-based ROI (weighted-ICA) method in gray and white matter regions. The paired t-test is employed to test the difference between the manual and ICA-based method in the artery (GMa and WMa) and surrounding tissue (GMs and WMs) and between the artery and surrounding tissue in the ICA-based method in gray and white matter regions.
| rCBF (mL/100 g/min) | Manu-roi | ICA-aw | ICA-sw | ||||||
|---|---|---|---|---|---|---|---|---|---|
| GMm | WMm | (G/W)m | GMa | WMa | (G/W)a | GMs | WMs | (G/W)s | |
| #1 (36 y, m) | 66.98 | 38.35 | 1.746 | 56.13 | 35.17 | 1.596 | 41.94 | 24.83 | 1.689 |
| #2 (33 y, m) | 54.22 | 28.22 | 1.921 | 54.25 | 30.78 | 1.762 | 40.83 | 21.98 | 1.857 |
| #3 (32 y, m) | 42.26 | 24.05 | 1.757 | 48.00 | 30.60 | 1.569 | 35.02 | 21.14 | 1.656 |
| #4 (46 y, m) | 45.79 | 29.57 | 1.549 | 40.33 | 30.16 | 1.337 | 38.70 | 24.55 | 1.576 |
| #5 (35 y, f) | 64.09 | 28.75 | 2.229 | 60.73 | 28.78 | 2.110 | 46.52 | 23.68 | 1.964 |
| #6 (35 y, f) | 49.08 | 21.95 | 2.236 | 48.09 | 22.13 | 2.173 | 46.75 | 21.17 | 2.208 |
| #7 (38 y, f) | 37.33 | 20.13 | 1.855 | 41.74 | 24.73 | 1.688 | 34.05 | 17.71 | 1.922 |
| #8 (29 y, f) | 69.27 | 32.20 | 2.151 | 66.52 | 34.73 | 1.915 | 45.10 | 21.55 | 2.093 |
|
| |||||||||
| Mean | 53.63 | 27.90 | 1.931 | 51.97 | 29.64 | 1.769a | 41.11a,b | 22.08a,b | 1.871a,b |
|
| |||||||||
| Stdc | 12.01 | 5.879 | 0.253 | 9.118 | 4.476 | 0.2839 | 4.935 | 2.309 | 0.221 |
GM = gray matter; WM = white matter; G/W = the ratio of gray matter and white matter.
aSignificantly (P < 0.05, paired t-test) higher than ROIm in GM, WM, and G/W.
bSignificantly (P < 0.05, paired t-test) higher than A wic in GM, WM, and G/W.
cStandard deviation.