NDT Technology

NDT Technology

Feasibility Study of Tomography using Cargo Scanner System by Modeling and Experimental Methods

Document Type : Original Article

Authors
AmirMohammad Beigzadeh
Mojtaba Askari
Ali Taheri
Radiation Application Research School, Nuclear Science and Technology Research Institute, Tehran, Iran
10.30494/jndt.2022.310025.1087
Abstract
Today, computed tomography has a wide of applications in medical and industrial imaging systems. In CT the inside image of the objects is obtained by scanning it at different angles and reconstructing the image. Industrial CT is used in many industrial areas for internal inspection of parts. Some of its key applications in industry are fault detection, non-destructive inspection, failure analysis, metrology, assembly analysis and reverse engineering. In this study, the CT feasibility study of a standard phantom specimen was performed with a cargo scanner system. The phantom contains 5.0 mm, 10.0 mm, 20.0 mm, diameter rods made of iron, aluminium and polyethylene and the total number of phantom rods was 9. The Imaging system geometry consists of a linear array detector and a gamma ray source. Two mathematical methods, MLEM and BackProjection, were used for reconstructing the projection that obtained from the sample. First the proposed CT system was simulated using the MCNPX Monte Carlo code. The CT images of phantom were compared in terms of the reconstruction methods and the experimental and simulated geometry.
Keywords
Computed Tomography
Gamma radiography
MCNPX
Resolution test. Contrast test
[1] C. Cowling, Global review of radiography. Radiography, Radiography, Vol 19, No. 2, pp.90-91, 2013
 
[2] S.L. Brooks, Computed tomography. Dental Clinics of North America, Vol 37, No. 4, pp.575-590, 1993.
 
[3] F.F. Hopkins, I.L. Morgan, H.D. Ellinger, R.V. Klinksiek, G.A. Meyer and J.N. Thompson, Industrial tomography applications, IEEE Transactions on Nuclear Science, Vol 28, No. 2, pp.1717-1720, 1981.
 
[4] J. Lambert, A. R. Chambers, I. Sinclair, S.M. Spearing, 3D damage characterisation and the role of voids in the fatigue of wind turbine blade materials, Composites Science and Technology. Vol 72 No. 2, pp.337-343, 2012.
[5] G. L. Zeng, Medical image reconstruction: a conceptual tutorial, Springer,New York,2010.
 
[6] L. M. Evans, L. Margetts,V. Casalegno, L.M. Lever, J. Bushell, T. Lowe, A. Wallwork, P. Young, A. Lindemann. (2015-05-28). Transient thermal finite element analysis of CFC–Cu ITER monoblock using X-ray tomography data. Fusion Engineering and Design. Vol 100, PP. 100–111.
 
[7] M. Wang,  Industrial tomography: systems and applications, 1th ed. Elsevier, 2015.
 
[8] D. J., Bull,; L. Helfen, I. Sinclair,S.M. Spearing, T. Baumbach, A comparison of multi-scale 3D X-ray tomographic inspection techniques for assessing carbon fibre composite impact damage, Composites Science and Technology. Vol 75, PP. 55–61, 2013.
 
[9] S.L. Waters, MCNPX user’s manual, Los Alamos National Laboratory, 2002.

  • Receive Date 08 April 2022
  • Revise Date 19 May 2022
  • Accept Date 11 June 2022