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This paper is to investigate the high-quality analytical reconstructions ofmultiple source-translation computed tomography (mSTCT) under an extended fieldof view (FOV). Under the larger FOVs, the previously proposed backprojectionfiltration (BPF) algorithms for mSTCT, including D-BPF and S-BPF (theirdifferences are different derivate directions along the detector and source,respectively), make some errors and artifacts in the reconstructed images dueto a backprojection weighting factor and the half-scan mode, which deviatesfrom the intention of mSTCT imaging. In this paper, to achieve reconstructionwith as little error as possible under the extremely extended FOV, we combinethe full-scan mSTCT (F-mSTCT) geometry with the previous BPF algorithms tostudy the performance and derive a suitable redundancy-weighted function forF-mSTCT. The experimental results indicate FS-BPF can get high-quality, stableimages under the extremely extended FOV of imaging a large object, though itrequires more projections than FD-BPF. Finally, for different practicalrequirements in extending FOV imaging, we give suggestions on algorithmselection.

Analytical reconstructions of full-scan multiple source-translation computed tomography under large field of views