Article Article
Using Experiment and Simulation to Understand the Effects of Source Filtering on Artifact Reduction for Industrial X-ray Computed Tomography

X-ray tubes create polychromatic X-ray spectra from tungsten and other target materials. When left unfiltered, the lower and moderate energies traveling through a test object result in several undesirable artifacts in X-ray computed tomography (CT) images, namely scatter and beam hardening artifacts. In this study, we performed experiments and simulations with different tube (source) filters to visualize the effects of filtration on the reduction of artifacts. A commercial CT system with the scatter correction technique was also employed for comparison with the filtration scenarios. The simulations are used in a sense to validate the experiments (normally we do the opposite) and explore the broad range of simulation possible for X-ray CT. Finally, more simulations are performed to show the effects of filtration on the X-ray spectra themselves in order to understand the effects seen in the CT images.



ASM International, 1989, ASM Handbook: Nondestructive Evaluation and Quality Control, ninth edition, ASM International, Materials Park, OH, Vol. 17, pp. 309–310, 376.

Costin, M., D. Tisseur, C. Vienne, R. Guillamet, H. Banjak, N. Bhatia, and R. Fernandez, 2016, “CIVA CT, An Advanced Simulation Platform for NDT,” 6th Conference on Industrial Computed Tomography, Wels, Austria.

Fernandez, R., S.A. Legoupil, M. Costin, and A. Leveque, 2012, “CIVA Computed Tomography Modeling,” World Conference on Non-Destructive Testing 2012, Durban, South Africa.

Foucher, F., R. Fernandez, S. Lonne, and S. LeBerre, 2016, “New Possibilities of Simulation Tools for NDT and Applications,” 19th World Conference on Non-Destructive Testing, Munich, Germany.

Meredith, W.J., and J.B. Massey, 1977, Fundamental Physics of Radiology, third edition, Elsevier, Bristol, Great Britain, pp. 140–150.

Telesz, S., and N. Pepper, 2016, “A New Scatter Correcting Technology for the Industrial Mini- and Micro CT of Large Multimaterial or Highly Absorbing Samples,” ASNT Digital Imaging Conference, 25–26 July, Mashantucket, CT.

Usage Shares
Total Views
182 Page Views
Total Shares
0 Tweets
0 PDF Downloads
0 Facebook Shares
Total Usage