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Anisotropy boosting improves ODF-Fingerprinting tractography in edematous brain

Filipiak, P.; Clarke, K.; Shepherd, T. M.; Bruno, M.; Placantonakis, D. G.; Baete, S. H.

2025-06-20 radiology and imaging
10.1101/2025.06.18.25329353 medRxiv
Show abstract

Peritumoral vasogenic edema of the brain is a major confounding factor for diffusion MRI tractography. Excessive fluids accumulated in edematous white matter decrease anisotropy of water self-diffusion which affects tracking algorithms. We address this hurdle with ODF-Fingerprinting (ODF-FP) -- a dictionary-based fiber reconstruction algorithm that accommodates variability of neural tissue. By adding a regularization term to the ODF-FP matching formula, we boost diffusion anisotropy to improve white matter fiber identification in edematous regions.

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