Diffusion MRI Tractography of Crossing Fibers by Cone-Beam ODF Regularization

Authors:
Hans-Heino Ehricke;Kay M. Otto;Vinoid Kumar;Uwe Klose
Affiliations:
Institute for Applied Computer Science, University of Applied Sciences, Stralsund, Germany;Institute for Applied Computer Science, University of Applied Sciences, Stralsund, Germany;Section of Experimental NMR of the CNS, University Hospitals, Tübingen, Germany;Section of Experimental NMR of the CNS, University Hospitals, Tübingen, Germany
Venue:
Proceedings of the 31st DAGM Symposium on Pattern Recognition
Year:
2009

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Abstract

Since the advent of high angular resolution diffusion imaging (HARDI) techniques in diffusion MRI great efforts have been taken in order to reconstruct complex white-matter structures, such as crossing, branching and kissing fibers. However, even highly sophisticated fiber tracking schemes, such as probabilistic tracking, suffer from the data's poor signal-to-noise (SNR) ratio. In this paper we present a novel regularization approach for q-ball fields, exploiting structural information within the data. We also propose a straightforward deterministic tracking algorithm, allowing delineation of even non-dominant pathways through crossing regions. Results from a phantom study with a biological phantom as well as a patient study, in which we reconstruct the pyramidal tract, emphasize the method's efficiency.