Affiliations: School of Biomedical Engineering, Shanghai Jiao Tong
University, Shanghai, China | Biomedical Imaging Division, VT-WFU School of
Biomedical Engineering and Science, Blacksburg, VA, USA
Note: [] Corresponding author: Jun Zhao, School of Biomedical
Engineering, Shanghai Jiao Tong University, Shanghai 200240, China. E-mail: junzhao@sjtuedu.cn
Abstract: In this paper, we study how to reconstruct multiple objects
tomographically from their overlapped x-ray projections. We propose a new
rotation-translation scanning mode for a fixed source-detector geometry, in
which the objects are individually translated periodically while they are
rotated during the data acquisition. The reconstruction scheme performs SART
reconstruction and TV minimization alternatingly. The scanning parameters are
evaluated in a series of numerical experiments. Promising results are obtained
in the cases of two and four objects respectively. The major advantage of our
approach is that the scanning time can be reduced by about 46% (for two
objects) and 67% (for four objects) respectively, improving the imaging
facility throughput significantly.
