diffusion tensor imaging
Advanced MRI technique that maps white matter fiber tracts by measuring water diffusion directionality.
Full Definition
Diffusion tensor imaging (DTI) is a specialized MRI technique that characterizes the microstructural organization of white matter by measuring the directional diffusion of water molecules along nerve fiber bundles. DTI provides quantitative metrics such as fractional anisotropy (FA) and mean diffusivity (MD) that reflect white matter integrity. This technique enables visualization of major white matter tracts through tractography and is valuable for assessing conditions affecting white matter, including multiple sclerosis, traumatic brain injury, and neurodevelopmental disorders. DTI has become an important tool in both clinical practice and neuroscience research.
Usage
Usage note: Abbreviate as DTI after first use; distinguish from basic DWI in technical contexts.
In Context
- "Diffusion tensor imaging revealed decreased fractional anisotropy in the corpus callosum." — Research paper
- "DTI parameters should be reported with appropriate statistical corrections for multiple comparisons." — Editorial guidelines