  This paper is to investigate the high-quality analytical reconstructions of
multiple source-translation computed tomography (mSTCT) under an extended field
of view (FOV). Under the larger FOVs, the previously proposed backprojection
filtration (BPF) algorithms for mSTCT, including D-BPF and S-BPF (their
differences are different derivate directions along the detector and source,
respectively), make some errors and artifacts in the reconstructed images due
to a backprojection weighting factor and the half-scan mode, which deviates
from the intention of mSTCT imaging. In this paper, to achieve reconstruction
with as little error as possible under the extremely extended FOV, we combine
the full-scan mSTCT (F-mSTCT) geometry with the previous BPF algorithms to
study the performance and derive a suitable redundancy-weighted function for
F-mSTCT. The experimental results indicate FS-BPF can get high-quality, stable
images under the extremely extended FOV of imaging a large object, though it
requires more projections than FD-BPF. Finally, for different practical
requirements in extending FOV imaging, we give suggestions on algorithm
selection.
