5 September 2014 Expectation maximisation algorithms for terahertz transmission tomography
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Terahertz (THz) tomography is a recently developed imaging technique allowing 3D inspection of opaque objects. In this paper, we develop an ordered subsets convex algorithm for THz transmission tomography (THz-OSC). Since the reconstruction quality is highly depending on the THz beam energy, we investigate afterwards a multienergy version of the algorithm in order to provide a more accurate reconstruction of the acquired sample. This multi-energy approach is validated by reconstructing data from tomographic acquisitions measured with a 84/287 GHz transmission scanner. Then we discuss how this dual-energy approach could be able to extract physical properties of acquired samples in addition to improving 3D reconstruction.
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B. Recur, B. Recur, H. Balacey, H. Balacey, Patrick Mounaix, Patrick Mounaix, "Expectation maximisation algorithms for terahertz transmission tomography", Proc. SPIE 9199, Terahertz Emitters, Receivers, and Applications V, 91990O (5 September 2014); doi: 10.1117/12.2062476; https://doi.org/10.1117/12.2062476

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