1. Accurate reconstruction of 4D spectral–spatial images from sparse-view data in continuous-wave EPRI.
- Author
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Zhang, Zheng, Epel, Boris, Chen, Buxin, Xia, Dan, Sidky, Emil Y., Halpern, Howard, and Pan, Xiaochuan
- Subjects
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ELECTRON paramagnetic resonance , *IMAGE reconstruction - Abstract
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. [Display omitted] • Investigating sparse-view scans in continuous-wave (CW) EPRI with Zeeman modulation. • Developing TV and DTV algorithms for accurate sparse-view image reconstruction. • Validating TV and DTV reconstructions for sparse-view CW EPRI in numerical studies. • Demonstrating quantitatively improved quality in TV and DTV reconstructions. • Providing insights for the design and optimization of fast scans in CW EPRI. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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