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Summary

Diffusion Tensor Imaging (DTI) scans show excellent reliability between sites using identical scanners and protocols. Tract-specific analysis (TSA) is particularly reliable, making it ideal for multicenter studies.

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Area of Science:

  • Neuroimaging
  • Medical Physics
  • Radiology

Background:

  • Diffusion Tensor Imaging (DTI) is crucial for assessing white matter integrity.
  • Multicenter studies require reliable imaging parameters across different sites.
  • Evaluating intersite scan reliability is essential for standardizing DTI data.

Purpose of the Study:

  • To assess the intersite scan reliability of Diffusion Tensor Imaging (DTI) parameters.
  • To compare reliability between voxel-based analysis and tract-specific analysis (TSA).
  • To determine the suitability of TSA for multicenter DTI research.

Main Methods:

  • Utilized identical 3T MRI scanners and acquisition protocols at two distinct research sites.
  • Performed voxel-based analysis to identify intersite differences in DTI parameters.
  • Conducted tract-specific analysis (TSA) to evaluate reliability of specific white matter tracts.

Main Results:

  • Voxel-based analysis identified several regions with significant intersite differences.
  • Tract-specific analysis (TSA) demonstrated high reliability with coefficients of variation below 4%.
  • Atlas-based analysis showed slightly lower reliability with coefficients of variation below 6%.

Conclusions:

  • DTI parameter reliability is excellent between sites when using standardized protocols and identical scanners.
  • Tract-specific analysis (TSA) exhibits superior intersite reliability compared to atlas-based methods.
  • TSA is a promising and reliable tool for multicenter Diffusion Tensor Imaging studies.