NDLI: Accelerating dynamic cardiac imaging based on a dual-dictionary learning algorithm

Content Provider	IEEE Xplore Digital Library
Author	Zhang, Changjiu Jin, Zhaoyang Ye, Haihui Liu, Feng
Copyright Year	2015
Description	Author affiliation: Institute of Information and Control, Hangzhou Dianzi University, Hangzhou, China (Zhang, Changjiu; Jin, Zhaoyang) \|\| Department of Fetal Monitoring, Women's Hospital, School of Medicine, Zhejiang University, Hangzhou, China (Ye, Haihui) \|\| School of Information Technology & Electrical Engineering, the University of Queensland, Brisbane, Australia (Liu, Feng)
Abstract	Traditional CS with dictionary learning (DL) algorithm can be applied in reconstruction for dynamic cardiac imaging (DCI), which is realized by multi-slice two-dimensional format (2D-DLDCI) or directly three-dimensional format (3D-DLDCI). It was reported that dual-dictionary learning algorithm can improve the reconstruction quality for the 3D magnetic resonance imaging (MRI) by introducing prior information and inter-frame correlation. In this study, dual-dictionary learning algorithm was applied in dynamic cardiac imaging (Dual-DLDCI) by exploring the symmetry of the cardiac cycle. High resolution dictionary was trained from the fully acquired previous frames within a period of relaxation, and low resolution dictionary was trained from the under-sampled frames. The patches for traditional 2D dictionary were replaced by the blocks to utilize the spatial correlation among frames. The high resolution dictionary instead of low resolution dictionary was used in the iterative reconstruction to provide prior information. The simulation and experiment results showed that, the Dual-DLDCI algorithm achieves much better reconstruction quality than the other two algorithms.
Starting Page	57
Ending Page	61
File Size	674171
Page Count	5
File Format	PDF
e-ISBN	9781509000227
DOI	10.1109/BMEI.2015.7401473
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-10-14
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	dynamic cardiac imaging Dictionaries Image resolution Correlation compressed sensing Heuristic algorithms Magnetic resonance imaging dual-dictionary learning dictionary learning Image reconstruction
Content Type	Text
Resource Type	Article

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