|
FIG 2. Graphs show measured values of rCBF, rCBV, and MTT at each region of interest. Error bars indicate SD ± 1. Measured values were normalized with the temporal white matter (WM), and values on the y axis thus represent gray matter-white matter ratios. Dashed horizontal lines intersect at a gray matter-white matter ratio of 1. Statistically significant differences in the mean values between various locations are indicated (*, P < .05; **, P < .005; ***, P < .0005; unpaired t test). Columns with statistically significant differences between gradient-echo (GRE) and spin-echo (SE) sequences are marked (
, statistically significant difference between gradient-echo and spin-echo with P < .05; 
, statistically significant difference between gradient-echo and spin-echo with P < .005). Columns marked by these symbols represent those with higher values.
A, Measurements of the rCBF by gradient-echo echo-planar imaging.
B, Measurements of the rCBF by spin-echo echo-planar imaging.
C, Measurements of the rCBV by gradient-echo echo-planar imaging.
D, Measurements of the rCBV by spin-echo echo-planar imaging.
E, Measurements of the MTT by gradient-echo echo-planar imaging.
F, Measurements of the MTT by spin-echo echo-planar imaging.
|