diffusion weighted imaging

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diffusion weighted imaging

MRIs with intensity proportional to the diffusion constant of water; because of the impaired movement of water in myelin, the signal is strongest parallel to nerve tracts; used primarily to evaluate edema in acute stroke, but also shows demyelinating diseases, and has been used in mapping muscle fiber direction in the heart.
Synonym(s): diffusion imaging
Farlex Partner Medical Dictionary © Farlex 2012
References in periodicals archive ?
Structural and diffusion imaging versus clinical assessment to monitor amyotrophic lateral sclerosis.
These trainings were given as 2 hours for practical and 2 hours for theoretical through a PowerPoint presentation showing diffusion imaging pathologies.
MR diffusion imaging and MR spectroscopy of maple syrup urine disease during acute metabolic decompensation.
Grant et al., "Restricted diffusion in spinal cord infarction demonstrated by magnetic resonance line scan diffusion imaging," Stroke, vol.
Woolrich et al., "Noninvasive mapping of connections between human thalamus and cortex using diffusion imaging," Nature Neuroscience, vol.
Himmelreich et al., "MR perfusion and diffusion imaging in the follow-up of recurrent glioblastoma treated with dendritic cell immunotherapy: a pilot study," Neuroradiology, vol.
Advanced imaging techniques such as diffusion imaging have markedly improved the specificity of MRI in differentiation between pituitary abscesses and tumors, since increase in diffusion signal and decrease of apparent diffusion coefficient are typical for abscesses, whereas necrotic masses show decreased signal on diffusion sequence and elevation of apparent diffusion coefficient(2).

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