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.
