Abstract:
In recent decades active infrared thermography
gained vital importance in the field of non-destructive testing and evaluation. It is non-invasive, non-ionizing, reliable,
quantitative and qualitative imaging modality for estimation
of properties of surface and subsurface abnormalities in
various biomaterials. Recently introduced non-periodic thermal excitation schemes for the active infrared thermography
gained attention in thermal imaging community by providing
a solution to overcome the constrains associated with the
traditional pulse and lock-in infrared thermography methods.
Among these thermographic methods, digitized frequency
modulated thermal wave imaging is one of the imaging modality which supports the principle of pulse compression to
overcome constrains associated with traditional methods. This work proposes an analytical solution for digitized
frequency modulated thermal wave imaging, which is used for estimation of osteoporosis stages in multilayer human
bone model. In order to validate the proposed analytical approach, the results obtained from the analytical approach has
been compared with the numerically obtained results from a commercially available simulator (COMSOL Multiphysics) by
taking correlation coefficient as a figure of merit.
