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Statistical Beam-Hardening Correction for Industrial X-ray Computed Tomography
| Content Provider | Semantic Scholar |
|---|---|
| Author | Thierry, Raphael Flisch, Alexander Miceli, Alice |
| Copyright Year | 2006 |
| Abstract | We present an industrial X-ray computed tomograph (CT) system used as an integrated dimensional inspection and non-destructive evaluation tool. The Beam-Hardening (BH) effect inherent to the use of polyenergetic X-ray source is one of major source of artefacts for materials of high atomic number. We present a statistical correction method relying on the histogram analysis of a first uncorrected image. At each voxel, the mass attenuation is re-expressed as the weighted sum of the mass attenuation of a given set of reference materials. The method requires a pre-knowledge of the spectrum and detector response or a set of calibration curves. We illustrate the method on a turbine blade in simulation and with experimental data. The results show that the statistical method give undeniable better results and with only few iterations when using accelerations techniques. Moreover the method exhibits its capacity to incorporate a priori knowledge, such as constrained density values, non-null support or outer-edge information coming from complementary Non-Destructive modality. Eventually, by reconstructing the density repartition the presented algorithm also display an additional quantitative aspect. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://www.ndt.net/article/ecndt2006/doc/We.3.7.2.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
