2021 IEEE International Conference on Image Processing

19-22 September 2021 • Anchorage, Alaska, USA

Imaging Without Borders

2021 IEEE International Conference on Image Processing

19-22 September 2021 • Anchorage, Alaska, USA

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Paper Detail

Paper IDCIS-1.8
Paper Title CAD-BASED SCATTER COMPENSATION FOR POLYCHROMATIC RECONSTRUCTION OF ADDITIVE MANUFACTURED PARTS
Authors Domenico Iuso, Ehsan Nazemi, Nathanaël Six, Björn De Samber, Jan De Beenhouwer, Jan Sijbers, University of Antwerpen, Belgium
SessionCIS-1: Computational Imaging Systems
LocationArea J
Session Time:Monday, 20 September, 15:30 - 17:00
Presentation Time:Monday, 20 September, 15:30 - 17:00
Presentation Poster
Topic Computational Imaging Systems: Tomographic Imaging
IEEE Xplore Open Preview  Click here to view in IEEE Xplore
Abstract High density materials, such as metals, strongly scatter X-ray photons during X-ray Computed Tomography (CT) scans, which is detrimental to the quality of the reconstructed images. In this study, a scatter compensation method for X-ray CT, based on Monte-Carlo (MC) simulations from the object's CAD model, is presented and employed in conjunction with polychromatic reconstructions. The estimation of the scatter contributions is accelerated by 1) reducing the number of simulated projections accordingly to the Nyquist theorem, 2) noise reduction 3) angular interpolation. The method was applied to enhance CT images of a steel object produced via Additive Manufacturing, whose CAD model is known. Results show that, in conjunction with polychromatic reconstruction, our method can efficiently reduce beam hardening, scattering artifacts and increase the contrast of defects within the object.