0 38

Cited 0 times in

Accelerated Cardiac Diffusion Tensor Imaging Using Joint Low-Rank and Sparsity Constraints

 Sen Ma  ;  Christopher T. Nguyen  ;  Anthony G. Christodoulou  ;  Daniel Luthringer  ;  Jon Kobashigawa  ;  Sang-Eun Lee  ;  Hyuk-Jae Chang  ;  Debiao Li 
 IEEE Transactions on Biomedical Engineering, Vol.65(10) : 2219-2230, 2018 
Journal Title
 IEEE Transactions on Biomedical Engineering 
Issue Date
OBJECTIVE: The purpose of this paper is to accelerate cardiac diffusion tensor imaging (CDTI) by integrating low-rankness and compressed sensing. METHODS: Diffusion-weighted images exhibit both transform sparsity and low-rankness. These properties can jointly be exploited to accelerate CDTI, especially when a phase map is applied to correct for the phase inconsistency across diffusion directions, thereby enhancing low-rankness. The proposed method is evaluated both ex vivo and in vivo, and is compared to methods using either a low-rank or sparsity constraint alone. RESULTS: Compared to using a low-rank or sparsity constraint alone, the proposed method preserves more accurate helix angle features, the transmural continuum across the myocardium wall, and mean diffusivity at higher acceleration, while yielding significantly lower bias and higher intraclass correlation coefficient. CONCLUSION: Low-rankness and compressed sensing together facilitate acceleration for both ex vivo and in vivo CDTI, improving reconstruction accuracy compared to employing either constraint alone. SIGNIFICANCE: Compared to previous methods for accelerating CDTI, the proposed method has the potential to reach higher acceleration while preserving myofiber architecture features, which may allow more spatial coverage, higher spatial resolution, and shorter temporal footprint in the future.
Full Text
Appears in Collections:
1. College of Medicine (의과대학) > Dept. of Internal Medicine (내과학교실) > 1. Journal Papers
Yonsei Authors
Lee, Sang Eun(이상은) ORCID logo https://orcid.org/0000-0001-6645-4038
Chang, Hyuck Jae(장혁재) ORCID logo https://orcid.org/0000-0002-6139-7545
RIS (EndNote)
XLS (Excel)
사서에게 알리기


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.