Chemistry Reference
In-Depth Information
0 3.3
×
10
-4
6.6
×
10
-4
9.9
×
10
-4
0 3.3
×
10
-4
6.6
×
10
-4
9.9
×
10
-4
(a)
(b)
15
10
5
0
0.0003
0.0004
0.0005
0.0006
0.0007
0.0008
0.0009
D
mm
2
s
1
(c)
8
6
4
2
0
0.0003
0.0004
0.0005
0.0006
0.0007
0.0008
0.0009
D
mm
2
s
1
(d)
Figure 27.
(a) A map of the parameter
D
for GM, and a histogram of the distribution from the
gradient-echo experiment with the ramped gradient shapes with variable duration. (b) The distribution
of diffusion coefficients in WM in the ramped gradient experiment. (c) A histogram of the distribution
of diffusion coefficients in (a) with a mean of 0.49
±
0.16
×
10
−
3
mm
2
s
−
1
. (d) A histogram plot of
(b) with mean 0.4
±
0.17
×
10
−
3
mm
2
s
−
1
. (See insert for color representation of the figure).
