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Diffusion weighted contrast
Gaussian distribution of diffusion
Signal
S = S
0
・
e
-bD
If DW signal comes from free diffusion, gradient magnetic pulse would decay DW signal
mono-exponentially with b-value
Diffusivity (-bD) decreases linearly across b-value
Diffusion coefficient is constant
b-value
D = ln(S/S
0
) / -b
D
-bD = ln(S/S
0
)
ln(S/S
0
)
b-value
b-value
Litcofsky, Pittsburg Uni