The effect of the acquisition parameters in HARDI

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Validating validators : an analysis of DWMRI hardware and software phantoms

Abstract only

The effect of the acquisition parameters for high angular resolution diffusion imaging

No abstrac

Validating validators : an analysis of DWMRI hardware and software phantoms

Abstract only

Key feature extraction for fatigue identification using random forests

Annual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings7 VOLS2044-2047CEMB

Optimal acquisition schemes in high angular resolution diffusion weighted imaging

The recent challenge in diffusion imaging is to find acquisition schemes and analysis approaches that can represent non-gaussian diffusion profiles in a clinically feasible measurement time. In this work we investigate the effect of b-value and the number of gradient vector directions on Q-ball imaging and the Diffusion Orientation Transform (DOT) in a structured way using computational simulations, hardware crossing-fiber diffusion phantoms, and in-vivo brain scans. We observe that DOT is more robust to noise and independent of the b-value and number of gradients, whereas Q-ball dramatically improves the results for higher b-values and number of gradients and at recovering larger angles of crossing. We also show that Laplace-Beltrami regularization has wide applicability and generally improves the properties of DOT. Knowledge of optimal acquisition schemes for HARDI can improve the utility of diffusion weighted MR imaging in the clinical setting for the diagnosis of white matter diseases and presurgical planning