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Cho, Hyungjoon
Biomedical Imaging Science and Engineering Lab(BISE)
Research Interests
  • Imaging tumor microenvironments, susceptibility contrast based MR structural imaging, ultra fast acquisitions of dynamic MR, algorithm/Hardware development for magnetic particle imaging

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Acceleration of multi-dimensional propagator measurements with compressed sensing

Cited 6 times inthomson ciCited 4 times inthomson ci
Title
Acceleration of multi-dimensional propagator measurements with compressed sensing
Author
Paulsen, Jeffrey L.Cho, HyungjoonCho, GyunggooSong, Yi-Qiao
Keywords
3D diffusion; Acquisition time; Anisotropic Diffusion; Anisotropic material; Biological tissues; Compressed sensing; Internal structure; Minimal effects; Propagator; Reconstruction techniques; Restricted diffusion; Sampled data; Stretched polymers; Sub-sampling
Issue Date
201112
Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
Citation
JOURNAL OF MAGNETIC RESONANCE, v.213, no.1, pp.166 - 170
Abstract
NMR can probe the microstructures of anisotropic materials such as liquid crystals, stretched polymers and biological tissues through measurement of the diffusion propagator, where internal structures are indicated by restricted diffusion. Multi-dimensional measurements can probe the microscopic anisotropy, but full sampling can then quickly become prohibitively time consuming. However, for incompletely sampled data, compressed sensing is an effective reconstruction technique to enable accelerated acquisition. We demonstrate that with a compressed sensing scheme, one can greatly reduce the sampling and the experimental time with minimal effect on the reconstruction of the diffusion propagator with an example of anisotropic diffusion. We compare full sampling down to 64x sub-sampling for the 2D propagator measurement and reduce the acquisition time for the 3D experiment by a factor of 32 from similar to 80 days to similar to 2.5 days.
URI
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DOI
http://dx.doi.org/10.1016/j.jmr.2011.08.025
ISSN
1090-7807
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