In-room imaging and MR planning

Diffusion weighted contrast

Gaussian distribution of diffusion

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

・ e -bD

-bD = ln(S/S 0 )

D = ln(S/S 0

) / -b

S = S

0

)

0

D

Signal

ln(S/S

b-value

b-value

b-value

Litcofsky, Pittsburg Uni