Accurate reconstruction of 4D spectral-spatial images from sparse-view data in continuous-wave EPRI.

Autor: Zhang Z; Department of Radiology, The University of Chicago, Chicago, IL, USA., Epel B; Department of Radiation & Cellular Oncology, The University of Chicago, Chicago, IL, USA., Chen B; Department of Radiology, The University of Chicago, Chicago, IL, USA., Xia D; Department of Radiology, The University of Chicago, Chicago, IL, USA., Sidky EY; Department of Radiology, The University of Chicago, Chicago, IL, USA., Halpern H; Department of Radiation & Cellular Oncology, The University of Chicago, Chicago, IL, USA., Pan X; Department of Radiology, The University of Chicago, Chicago, IL, USA; Department of Radiation & Cellular Oncology, The University of Chicago, Chicago, IL, USA. Electronic address: xpan@uchicago.edu.
Jazyk: angličtina
Zdroj: Journal of magnetic resonance (San Diego, Calif. : 1997) [J Magn Reson] 2024 Apr; Vol. 361, pp. 107654. Date of Electronic Publication: 2024 Mar 12.
DOI: 10.1016/j.jmr.2024.107654
Abstrakt: In continuous-wave electron paramagnetic resonance imaging (CW EPRI), data are collected generally at densely sampled views sufficient for achieving accurate reconstruction of a four dimensional spectral-spatial (4DSS) image by use of the conventional filtered-backprojection (FBP) algorithm. It is desirable to minimize the scan time by collection of data only at sparsely sampled views, referred to as sparse-view data. Interest thus remains in investigation of algorithms for accurate reconstruction of 4DSS images from sparse-view data collected for potentially enabling fast data acquisition in CW EPRI. In this study, we investigate and demonstrate optimization-based algorithms for accurate reconstruction of 4DSS images from sparse-view data. Numerical studies using simulated and real sparse-view data acquired in CW EPRI are conducted that reveal, in terms of image visualization and physical-parameter estimation, the potential of the algorithms developed for yielding accurate 4DSS images from sparse-view data in CW EPRI. The algorithms developed may be exploited for enabling sparse-view scans with minimized scan time in CW EPRI for yielding 4DSS images of quality comparable to, or better than, that of the FBP reconstruction from data collected at densely sampled views.
Competing Interests: Declaration of competing interest The authors declare the following financial interests/personal relationships which may be considered as potential competing interests: Xiaochuan Pan reports financial support was provided by National Institutes of Health. Boris Epel, Howard Halpern reports a relationship with O2M Technologies LLC that includes: board membership and equity or stocks. Howard Halpern has patent #8664955, 10568537, and 9392957. If there are other authors, they declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024. Published by Elsevier Inc.)
Databáze: MEDLINE
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