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Estimation of fiber orientations using neighborhood information
Ye, Chuyang; Zhuo, Jiachen; Gullapalli, Rao; Prince, Jerry
Source PublicationMedical Image Analysis
; Data from diffusion magnetic resonance imaging (dMRI) can be used to reconstruct fiber tracts, for example, in muscle and white matter. Estimation of fiber orientations (FOs) is a crucial step in the reconstruction process and these estimates can be corrupted by noise. In this paper, a new method called  Fiber Orientation Reconstruction using Neighborhood Information (FORNI) is described and shown to reduce  the effects of noise and improve FO estimation performance by incorporating spatial consistency. FORNI uses a fixed tensor basis to model the diffusion weighted signals, which has the advantage of providing an explicit relationship between the basis vectors and the FOs. FO spatial coherence is encouraged using weighted l1-norm regularization terms, which contain the interaction of directional information between neighbor voxels. Data fidelity is encouraged using a squared error between the observed and reconstructed diffusion weighted signals. After appropriate weighting of these competing objectives, the resulting objective function is minimized using a block coordinate descent algorithm, and a straightforward parallelization strategy is used to speed up processing. Experiments were performed on a digital crossing phantom, ex vivo tongue dMRI data, and in vivo brain dMRI data for both qualitative and quantitative evaluation. The results demonstrate that FORNI improves the quality of FO estimation over other state of the art algorithms.
KeywordDiffusion Mri Fiber Orientation Estimation Neighborhood Information
Indexed BySCI
Document Type期刊论文
Corresponding AuthorYe, Chuyang
Recommended Citation
GB/T 7714
Ye, Chuyang,Zhuo, Jiachen,Gullapalli, Rao,et al. Estimation of fiber orientations using neighborhood information[J]. Medical Image Analysis,2016(32):243-256.
APA Ye, Chuyang,Zhuo, Jiachen,Gullapalli, Rao,&Prince, Jerry.(2016).Estimation of fiber orientations using neighborhood information.Medical Image Analysis(32),243-256.
MLA Ye, Chuyang,et al."Estimation of fiber orientations using neighborhood information".Medical Image Analysis .32(2016):243-256.
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