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Diffusion-weighted magnetic resonance imaging

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In diagnostic imaging, diffusion-weighted magnetic resonance imaging (diffusion magnetic resonance imaging or diffusion weighting imaging or DWI) is a type of magnetic resonance imaging. DWI is based on the nuclear magnetic resonance principle in which measures of diffusion are incorporated into the process of image generation.

"The degree of molecular movement can be measured by changes of apparent diffusion coefficient (ADC) with time, as reflected by tissue microstructure. Diffusion MRI has been used to study brain ischemia and tumor response to treatment."[1]

DWI contrasts with perfusion-weighted magnetic resonance imaging (magnetic resonance angiography).


  1. Anonymous (2020), Diffusion-weighted magnetic resonance imaging (English). Medical Subject Headings. U.S. National Library of Medicine.