An improved OPDT model in high angular resolution diffusion imaging

	An improved OPDT model in high angular resolution diffusion imaging
	Zhang, Na 1,2; Li, Chong 1; Jiang, Tianzi2
刊名	JOURNAL OF MATHEMATICAL IMAGING AND VISION
	2014-03-01
卷号	48 期号:3 页码:385-395
关键词	Orientation distribution function (ODF) Diffusion-magnetic resonance imaging (dMRI) High angular resolution diffusion imaging (HARDI) Funk-Radon transform (FRT)
英文摘要	Orientation probability density transform (OPDT) is a single-shell high angular resolution diffusion imaging (HARDI) estimator proposed by Tristan-Vega et al. for orientation probability density function (OPDF), i.e. marginal orientation distribution function (ODF) of white matter fibers in the brain. Unlike ODF in Q-Ball imaging (QBI), the Jacobian of the spherical coordinate is included in OPDF. OPDT is based on the Funk-Radon transform (FRT), so there is blurring introduced by FRT. Aganj et al. have proved that the radial part of the OPDF equals a constant, which is independent of the diffusion signal. With this consideration, we propose an improved form of OPDT with a closed form expression, which can reduce the FRT blurring in OPDT by replacing the radial part (a non-constant function) with its mean value over the sphere. Compared with OPDT, the proposed FRT-based single-shell HARDI estimator improves the angular resolution, and almost maintains the higher angular accuracy, robustness to noise and computational efficiency. Results on synthetic data and real human brain data are provided to demonstrate the effectiveness of the proposed model.
WOS标题词	Science & Technology ; Technology ; Physical Sciences
类目[WOS]	Computer Science, Artificial Intelligence ; Computer Science, Software Engineering ; Mathematics, Applied
研究领域[WOS]	Computer Science ; Mathematics
关键词[WOS]	SPHERICAL DECONVOLUTION ; FIBER ORIENTATIONS ; WEIGHTED MRI ; TENSOR ; PRINCIPLES ; PROPAGATOR
收录类别	SCI
语种	英语
WOS记录号	WOS:000332459300002
内容类型	期刊论文
源URL	[http://ir.ia.ac.cn/handle/173211/3207]
专题	自动化研究所_脑网络组研究中心
作者单位	1.Zhejiang Univ, Dept Math, Hangzhou 310027, Zhejiang, Peoples R China 2.Chinese Acad Sci, Ctr Computat Med, Natl Lab Pattern Recognit, Inst Automat, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Na,Li, Chong,Jiang, Tianzi. An improved OPDT model in high angular resolution diffusion imaging[J]. JOURNAL OF MATHEMATICAL IMAGING AND VISION,2014,48(3):385-395.
APA	Zhang, Na,Li, Chong,&Jiang, Tianzi.(2014).An improved OPDT model in high angular resolution diffusion imaging.JOURNAL OF MATHEMATICAL IMAGING AND VISION,48(3),385-395.
MLA	Zhang, Na,et al."An improved OPDT model in high angular resolution diffusion imaging".JOURNAL OF MATHEMATICAL IMAGING AND VISION 48.3(2014):385-395.