NDLI: Segmented rapid magnetic resonance imaging using structured sparse representations

Content Provider	IEEE Xplore Digital Library
Author	Singh, V. Dan Wang Tewfik, A.H.
Copyright Year	2011
Description	Author affiliation: Electrical and Computer Engineering Dept. University of Texas, Austin, USA (Singh, V.; Dan Wang; Tewfik, A.H.)
Abstract	This paper presents a novel approach for segmented rapid magnetic resonance (MRI) imaging using structured sparse representations. In recent years, MR imaging speed has been improved through techniques relying on reduced data acquisition either to allow less-perceivable artifacts or to exploit the data-redundancy. But, these techniques require design of randomized sampling patterns which prove to be sub-optimal from the point of attaining high acceleration gains. The proposed approach treats the imaging problem as a segmented imaging problem constrained to structured dictionaries learned from a small training dataset. The solution to which, is further relaxed to allow recovery of segmented component images from the under-sampled Fourier space. The under-sampling corresponds to traversing few commonly used sampling trajectories only (such as: spirals and radials), i.e., no special sampling pattern design is needed. This highly reduces the number of trajectory acquisitions needed per image formation and, reconstruction in learned dictionaries leads to recovery of automatic segmented images. Experimental results on a real-patient cardiac cine-MR data-set recover high quality segmented images at an acceleration factor of R=13.5 using only 2-spiral sampling trajectories.
File Size	444174
Starting Page	2277
Ending Page	2260
File Format	PDF
ISBN	9781457713040
ISSN	15224880
e-ISBN	9781457713033
e-ISBN	9781457713026
DOI	10.1109/ICIP.2011.6116093
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-09-11
Publisher Place	Belgium
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Image segmentation Magnetic resonance imaging Trajectory Image reconstruction PSNR Dictionaries Rapid MRI Structured Sparse Representations Segmentation Subspaces Magnetic Resonance Imaging
Content Type	Text
Resource Type	Article

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