Ms. Caroline Bossuyt Profile

Caroline Bossuyt

at Univ of Antwerp

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Proceedings Article | 14 October 2022 Presentation + Paper

Optimization of a multi-source rectangular x-ray CT geometry for inline inspection

C. Bossuyt, J. De Beenhouwer, J. Sijbers

Proceedings Volume 12242, 1224219 (2022) https://doi.org/10.1117/12.2633523

KEYWORDS: X-rays, X-ray sources, Inspection, X-ray imaging, X-ray computed tomography, Image quality, X-ray technology, Radiography, CT reconstruction

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A fast-moving economy requires X-ray technology that inspects container traffic promptly and with high accuracy to identify nonconforming cargo. Unfortunately, conventional X-ray CT with a rotating gantry cannot be used because of the limited throughput. Instead, X-ray radiographs are acquired, but these do not provide depth information of the objects to be inspected. A novel solution is to use rotation-free CT geometries, which aim to preserve the image quality by using multiple static X-ray sources, albeit their optimal position and orientation have not been extensively studied to date. In this work, we investigate a rectangular, fixed-gantry CT geometry, for which we implemented a comprehensive simulation framework using the ASTRA Toolbox.¹ In addition, the orientation of the X-ray sources was optimized to perform ROI imaging with enhanced image quality, in terms of the mean squared reconstruction error. Lastly, we challenged the equidistant distribution of X-ray sources as the preferred configuration and compared the reconstructions with those of a projected circular distribution. Although spatially bound improvements were observed, future research is required.

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