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Estimation of fiber orientations using neighborhood information
Ye, Chuyang; Zhuo, Jiachen; Gullapalli, Rao; Prince, Jerry
2016-08
发表期刊Medical Image Analysis
期号32页码:243-256
摘要
; 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.
关键词Diffusion Mri Fiber Orientation Estimation Neighborhood Information
收录类别SCI
文献类型期刊论文
条目标识符http://ir.ia.ac.cn/handle/173211/12095
专题脑网络组研究中心
通讯作者Ye, Chuyang
推荐引用方式
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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