Fourier method for 3-dimensional data fusion of X-ray Computed Tomography and ultrasound

Journal Article · 30 December 2021 · NDT and E International

DOI: https://doi.org/10.1016/j.ndteint.2021.102600 · OSTI ID:1844094

Leach, William  ^[1]; Lum, Jordan ^[1]; Champley, Kyle ^[1]; Azevedo, Stephen  ^[1]; Gardner, Casey  ^[1]; Kim, Hyojin ^[1]; Stobbe, David ^[1]; Townsend, Andrew ^[1]; Tringe, Joseph W. ^[1]

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1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

X-ray Computed Tomography (CT) is essential for nondestructive inspection of many manufactured components but is susceptible to various forms of artifacts and noise. In particular, multi-detector row cone-beam CT systems can suffer from so called “cone-beam” artifacts and partial volume effects, particularly on planar edges at the periphery of the field of view in the cone angle dimension. Uni-directional ultrasonic testing methods generally have extremely accurate in-plane depth resolution but poorer lateral resolution due to physical and geometric constraints. This paper presents a novel technique called Computed Tomographic Fusion (CT-F) which uses three-dimensional Fourier filtering to combine x-ray cone-beam CT reconstructions and ultrasound data in the frequency space. The result is a single image with improved accuracy and quality. CT-F mitigates artifacts while allowing for rapid, accurate characterization of large three-dimensional CT volumes. Finally, using simulations and experiments, we demonstrate artifact reduction and edge contrast improvement in volumetric reconstructions.

• Research Organization: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA); USDOE Laboratory Directed Research and Development (LDRD) Program
• Grant/Contract Number: AC52-07NA27344
• OSTI ID: 1844094
• Report Number(s): LLNL-JRNL-825755; 1039740
• Journal Information: NDT and E International, Journal Name: NDT and E International Journal Issue: no. 102600 Vol. 127; ISSN 0963-8695
• Publisher: ElsevierCopyright Statement
• Country of Publication: United States
• Language: English