Diffusion MRI
Diffusion MRI
Diffusion MRI (pronunciation: di-fyu-zhun em-ar-eye), also known as Diffusion Magnetic Resonance Imaging, is a medical imaging technique that allows the mapping of the diffusion process of molecules, mainly water, in biological tissues, in vivo and non-invasively.
Etymology
The term "Diffusion MRI" is derived from the English words "diffusion" and "MRI". "Diffusion" comes from the Latin diffundere, meaning "to spread out", while "MRI" is an acronym for Magnetic Resonance Imaging, a technique that uses magnetic fields and radio waves to generate images of the organs in the body.
Description
Diffusion MRI is a specific form of MRI that measures the random Brownian motion of water molecules within a voxel of tissue. In many biological tissues, the diffusion process can give important information about the spatial architecture of the tissues. For example, in the brain, diffusion MRI is used to produce diffusion tensor images of neural fibers to map the white matter tracts.
Related Terms
- MRI: A technique that uses a magnetic field and radio waves to create detailed images of the organs and tissues within your body.
- Voxel: A unit of graphic information that defines a point in three-dimensional space.
- Brownian motion: The random motion of particles suspended in a fluid resulting from their collision with the fast atoms or molecules in the gas or liquid.
- Diffusion tensor imaging: A MRI-based neuroimaging technique which makes it possible to estimate the location, orientation, and anisotropy of the brain's white matter tracts.
- White matter: The paler tissue of the brain and spinal cord, consisting mainly of nerve fibers with their myelin sheaths.
External links
- Medical encyclopedia article on Diffusion MRI
- Wikipedia's article - Diffusion MRI
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