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Materials 2018, 11(8), 1395;

Dynamic Tomographic Reconstruction of Deforming Volumes

LMT (ENS Paris-Saclay/CNRS/University Paris-Saclay), 61 avenue du Président Wilson, F-94235 Cachan, France
Author to whom correspondence should be addressed.
Received: 17 July 2018 / Revised: 3 August 2018 / Accepted: 6 August 2018 / Published: 9 August 2018
(This article belongs to the Special Issue In-Situ X-Ray Tomographic Study of Materials)
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The motion of a sample while being scanned in a tomograph prevents its proper volume reconstruction. In the present study, a procedure is proposed that aims at estimating both the kinematics of the sample and its standard 3D imaging from a standard acquisition protocol (no more projection than for a rigid specimen). The proposed procedure is a staggered two-step algorithm where the volume is first reconstructed using a “Dynamic Reconstruction” technique, a variant of Algebraic Reconstruction Technique (ART) compensating for a “frozen” determination of the motion, followed by a Projection-based Digital Volume Correlation (P-DVC) algorithm that estimates the space/time displacement field, with a “frozen” microstructure and shape of the sample. Additionally, this procedure is combined with a multi-scale approach that is essential for a proper separation between motion and microstructure. A proof-of-concept of the validity and performance of this approach is proposed based on two virtual examples. The studied cases involve a small number of projections, large strains, up to 25%, and noise. View Full-Text
Keywords: tomographic reconstruction; dynamic tomography; motion compensation; projection-based digital volume correlation tomographic reconstruction; dynamic tomography; motion compensation; projection-based digital volume correlation

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Jailin, C.; Roux, S. Dynamic Tomographic Reconstruction of Deforming Volumes. Materials 2018, 11, 1395.

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