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DTI Tractography for Surgical Planning

Advanced diffusion tensor imaging MR technique reconstructing white matter fiber tracts in vivo to map functional pathways (corticospinal, optic radiations, arcuate fasciculus, fornix) preoperatively for safer neurosurgical resection of brain tumors near eloquent areas.

Written by: Saygı Hospital Health Guide Editorial Board
Last updated:

This content has been compiled by the Saygı Hospital Health Guide Editorial Board and is periodically reviewed by a specialist physician.

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What is DTI Tractography for Surgical Planning?

Diffusion tensor imaging (DTI) tractography is an advanced MR neuroimaging technique that measures the directional diffusion of water molecules along myelinated axons, reconstructing white matter pathways three-dimensionally for surgical planning and neurological assessment.

DTI calculates fractional anisotropy (FA) and apparent diffusion coefficient (ADC) using diffusion-weighted imaging in 6-256 directions. Tractography algorithms include deterministic (FACT, streamlines) and probabilistic (Bayesian) methods, with newer techniques like constrained spherical deconvolution (CSD) and HARDI improving crossing fiber resolution.

Clinical applications: preoperative neurosurgical planning for tumors in/near eloquent areas (motor cortex, language areas), epilepsy surgery, deep brain stimulation targeting, multiple sclerosis lesion characterization, traumatic brain injury, neurodegenerative diseases, and pediatric developmental disorders.

Symptoms

Brain tumor adjacent to motor cortex or corticospinal tract
Glioma near language areas (Broca, Wernicke)
Tumor near optic radiation requiring visual field preservation
Refractory epilepsy with eloquent area involvement
Cavernoma or AVM in deep brain locations
Pediatric brain tumor with motor/cognitive concerns
Brainstem or thalamic lesions
Pre-DBS planning for movement disorders

Risk Factors

Brain tumor in/near eloquent cortex (motor, language, visual)
Tumor in deep brain locations (thalamus, brainstem)
Refractory focal epilepsy
Movement disorder requiring DBS targeting
Pediatric brain tumor with developmental considerations
Multiple sclerosis with eloquent lesion location
Traumatic brain injury with diffuse axonal injury
Suspected diffusion-related pathology

When to See a Doctor?

If you experience any of the following symptoms, seek medical attention promptly:

  • Preoperative planning for brain tumor near eloquent area
  • Epilepsy surgery candidate evaluation
  • DBS planning for Parkinson's, dystonia, essential tremor
  • Pediatric brain tumor surgical planning
  • Suspected diffuse axonal injury after head trauma
  • Multiple sclerosis with progressive deficit and unclear lesion contribution
  • Pre-radiation therapy for brain tumor near critical pathways
  • Research applications in neurodegenerative disease

Treatment Methods

01
MR scanner ≥3T with multichannel head coil for high signal-to-noise
02
Diffusion-weighted EPI sequence with 30-256 directions, b-values 1000-3000 s/mm²
03
Anatomic reference: high-resolution 3D T1-weighted sequence (MPRAGE) and T2/FLAIR
04
DTI processing: motion correction, eddy current correction, tensor calculation
05
Generation of FA maps, ADC maps, and color-coded directional maps
06
Tractography algorithm selection: deterministic (FACT) for standard cases, probabilistic for tumor infiltration
07
ROI placement at known fiber tract endpoints (motor cortex, internal capsule, brainstem)
08
Tract reconstruction with FA threshold 0.15-0.20, angle threshold 30-45 degrees
09
Integration with neuronavigation systems (StealthStation, BrainLab) for intraoperative use
10
Combination with awake craniotomy and direct cortical/subcortical mapping for confirmation

Which Department to Visit?

You can visit our Radyoloji department for these complaints. Our specialist physicians will create the most suitable treatment plan for you.

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Health Disclaimer: The information on this page is prepared for general informational purposes only. It does not replace medical diagnosis and treatment. Please consult your physician for your complaints. Saygı Hospital does not accept responsibility for actions taken based on the information on this page.