Diffusion tensor imaging / tractography

What it is

Diffusion tensor imaging (DTI), used to create tractography, is an advanced MRI technique that maps the brain's white matter nerve fiber pathways (the "wiring" connecting brain regions). It shows how a glioma relates to these critical pathways, helping surgeons plan to protect them.

Understanding Diffusion tensor imaging / tractography

The brain's function depends not only on its regions but on the white matter pathways connecting them — for example, the pathways carrying movement, vision, or language signals. DTI tracks the direction of water movement along these fibers to map the pathways, and tractography displays them as three-dimensional tracts. In glioma care, this is valuable for surgical planning: knowing where critical pathways run relative to the tumor helps the surgeon plan an approach that removes as much tumor as possible while avoiding damage to important connections (such as motor or language pathways). DTI complements other planning tools (such as functional MRI and intraoperative mapping) to protect function. It is one of the advanced techniques that make modern glioma surgery safer. Understanding diffusion tensor imaging in gliomas clarifies how mapping nerve fiber pathways aids surgical planning.

Why it matters

Understanding diffusion tensor imaging helps patients and families see how mapping the brain's nerve fiber pathways aids surgical planning — helping surgeons remove tumor while protecting critical connections like motor and language pathways.