In-room imaging and MR planning

Summary: DWI contrast

• Diffusion is not free / Gaussian distributed in biological tissues.

– ADC value dependent on chosen b-values

• Low b-values (< 150 s/mm 2 ) probe for perfusion effects

• Intermediate b-values (up to 1000 s/mm 2 , or 1/ADC) best for evaluating diffusion metrics (ADC, FA, etc.) Jones & Basser, 2004 • Higher b-values (e.g., 2500 s/mm 2 ) may be more beneficial for tractography, likely as a result of greater sensitivity in detecting smaller fibers Rane, Nair & Duong, 2010