Modelling of Radiographic Inspections
Résumé
Computer modelling of non-destructive testing methods has come a
long way from the beginnings in the mid 90s to today. Radiographic modelling for
components with higher wall thicknesses, as they are typical for nuclear applications,
must include precise predictions of scattered radiation and its impact in
terms of contrast reduction. Dedicated or general purpose Monte Carlo methods
with the ability to calculate higher order scattering events are the state of the art
for these applications. Aerospace applications, on the other hand, have stronger
requirements on the modelling code’s capabilities to import complex CAD geometries,
and can bene fi t from faster analytical scatter models, limited to fi rst or
second order scattering events. Similar distinctions can be made for the various
approaches proposed to accurately model geometrical and fi lm unsharpness, fi lm
granularity, fi lm responses, fi lm/foil cartridges and photon noise. This article
presents a state-of-the-art review of radiographic modelling from the perspective
of two important application domains with very different requirements, nuclear
and aerospace.