CAD-BASED SCATTER COMPENSATION FOR POLYCHROMATIC RECONSTRUCTION OF ADDITIVE MANUFACTURED PARTS

被引：4

作者：

Iuso, Domenico ^{[1
]}

Nazemi, Ehsan ^{[1
]}

Six, Nathanael ^{[1
]}

De Samber, Bjorn ^{[1
]}

De Beenhouwer, Jan ^{[1
]}

Sijbers, Jan ^{[1
]}

机构：

[1] Univ Antwerp, Dept Phys, Vis Lab, IMEC, Antwerp, Belgium

来源：

2021 IEEE INTERNATIONAL CONFERENCE ON IMAGE PROCESSING (ICIP) | 2021年

关键词：

Additive manufacturing; scatter compensation; CAD model; Monte-Carlo simulations; X-ray computed tomography; SIMULATION;

D O I：

10.1109/ICIP42928.2021.9506536

中图分类号：

TP18 [人工智能理论];

学科分类号：

081104 ; 0812 ; 0835 ; 1405 ;

摘要：

High density materials, such as metals, strongly scatter Xray 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.

引用

页码：2948 / 2952

页数：5

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