Molecular Imaging 2017

Diffusion weighted MRI DWI

 DWI can generate apparent diffusion coefficient ( ADC) maps which characterize the diffusion environnement on a voxelwise basis.  Regions of diffusion restriction result from tumor hypercellularity : sequestration of fluid into the intracellular compartment and decreased extracellular space.  Based on biopsys and resection sample : cellularity, nuclear-cytoplasmic ratio and tumor grade are inversely propotional to ADC.

T1 gado

DW MRI

ADC