DWI
Also written as: DWI — Diffusion-Weighted Imaging
Diffusion-weighted imaging, an MRI technique that measures water molecule movement to assess tissue microstructure.
Full Definition
Diffusion-weighted imaging (DWI) is a specialized MRI technique that detects the Brownian motion of water molecules within tissues. It is particularly valuable in neuroimaging for identifying stroke, tumors, and white matter abnormalities. The technique measures how water diffusion is restricted by cellular structures, providing information about tissue integrity and pathology. DWI forms the foundation for more advanced techniques like diffusion tensor imaging.
Usage
Usage note: Always capitalize as acronym; avoid confusion with other diffusion techniques like DTI which is more specific
In Context
- "The radiologist ordered DWI sequences to rule out acute infarction in the patient's clinical presentation." — Stroke imaging protocol
- "DWI hyperintensity in the corpus callosum suggested restricted diffusion consistent with cytotoxic edema." — Radiology report