Open AccessMethod of non-destructive control of thickness and internal defectivity of the walls of metal pipe
Author(s) -
С. А. Золотарев,
P. S. Savenia,
K. A. Zhukov,
M. A. Sednina
Publication year - 2020
Publication title -
sistemnyj analiz i prikladnaâ informatika
Language(s) - English
Resource type - Journals
eISSN - 2414-0481
pISSN - 2309-4923
DOI - 10.21122/2309-4923-2020-3-28-33
Subject(s) - sizing , scattering , beam (structure) , hardening (computing) , radiation , optics , materials science , computer science , physics , composite material , art , layer (electronics) , visual arts
The possibility of an accurate estimation of the pipe wall thickness measured directly from the reconstructed image of the pipe, reconstructed from only a few X-ray projections made in a limited viewing angle, is discussed. Since the effects of radiation scattering and X-ray beam hardening distort up to 50 % of the primary radiation, ignoring these effects leads to blurred images, strong artifacts, and inaccurate sizing. A computerized technique has been developed that takes into account the contribution of scattered radiation and the hardening of the X-ray beam. Iterative Bayesian reconstruction techniques are then used to reconstruct the pipe image using the volumetric and surface-oriented representation of the pipe. Using these methods, the error in estimating the pipe wall thickness can be increased to 300 microns.