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 -test is employed to test the difference between the manual and ICA-based method in the artery ( and ) and surrounding tissue ( and ) and between the artery and surrounding tissue in the ICA-based method in gray and white matter regions.

rCBF (mL/100 g/min)Manu-roiICA-awICA-sw

#1 (36 y, m)66.9838.351.74656.1335.171.59641.9424.831.689
#2 (33 y, m)54.2228.221.92154.2530.781.76240.8321.981.857
#3 (32 y, m)42.2624.051.75748.0030.601.56935.0221.141.656
#4 (46 y, m)45.7929.571.54940.3330.161.33738.7024.551.576
#5 (35 y, f)64.0928.752.22960.7328.782.11046.5223.681.964
#6 (35 y, f)49.0821.952.23648.0922.132.17346.7521.172.208
#7 (38 y, f)37.3320.131.85541.7424.731.68834.0517.711.922
#8 (29 y, f)69.2732.202.15166.5234.731.91545.1021.552.093

Mean53.6327.901.93151.9729.641.76941.1122.081.871

Std12.015.8790.2539.1184.4760.28394.9352.3090.221

GM = gray matter; WM = white matter; G/W = the ratio of gray matter and white matter.
Significantly (, paired -test) higher than in GM, WM, and G/W.
Significantly (, paired -test) higher than in GM, WM, and G/W.
Standard deviation.