NDLI: High-resolution dynamic speech imaging with joint low-rank and sparsity constraints

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High-resolution dynamic speech imaging with joint low-rank and sparsity constraints

Content Provider	Scilit
Author	Fu, Maojing Zhao, Bo Carignan, Christopher Shosted, Ryan K. Perry, Jamie L. Kuehn, David P. Liang, Zhi-Pei Sutton, Bradley P.
Copyright Year	2014
Description	Journal: Magnetic Resonance in Medicine To enable dynamic speech imaging with high spatiotemporal resolution and full-vocal-tract spatial coverage, leveraging recent advances in sparse sampling. An imaging method is developed to enable high-speed dynamic speech imaging exploiting low-rank and sparsity of the dynamic images of articulatory motion during speech. The proposed method includes: (a) a novel data acquisition strategy that collects spiral navigators with high temporal frame rate and (b) an image reconstruction method that derives temporal subspaces from navigators and reconstructs high-resolution images from sparsely sampled data with joint low-rank and sparsity constraints. The proposed method has been systematically evaluated and validated through several dynamic speech experiments. A nominal imaging speed of 102 frames per second (fps) was achieved for a single-slice imaging protocol with a spatial resolution of 2.2 × 2.2 × 6.5 mm(3) . An eight-slice imaging protocol covering the entire vocal tract achieved a nominal imaging speed of 12.8 fps with the identical spatial resolution. The effectiveness of the proposed method and its practical utility was also demonstrated in a phonetic investigation. High spatiotemporal resolution with full-vocal-tract spatial coverage can be achieved for dynamic speech imaging experiments with low-rank and sparsity constraints.
Related Links	https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4261062/pdf
Ending Page	1832
Page Count	13
Starting Page	1820
e-ISSN	15222594
DOI	10.1002/mrm.25302
Journal	Magnetic Resonance in Medicine
Issue Number	5
Volume Number	73
Language	English
Publisher	Wiley-Blackwell
Publisher Date	2014-06-09
Access Restriction	Open
Subject Keyword	Journal: Magnetic Resonance in Medicine Radiology, Nuclear Medicine and Imaging Dynamic Speech Imaging Low-rank Approximation Partial Separability Modeling Spiral Navigation
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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