Optothermal transient emission radiometry

Photothermal Radiometry for Skin Research

“…In skin measurements, we are mainly interested in optical properties, as thermal properties do not change very much. Therefore, it is safe to assume that the skin is thermally homogeneous; then, Equation (2) can be solved by using Green's function method, to yield a time-dependent transient temperature field as [10]: …”

“…Photothermal radiometry (PTR), or opto-thermal radiometry (OTR), is an infrared remote sensing technique that was independently developed by Tam et al [1] and Imhof et al [2] back in the 1980s. It has since been used for biomedical applications [3][4][5] and for industrial non-destructive testing (NDT) [6,7].…”

“…By analyzing the shape of the signal, we can get information on sample's optical properties, thermal properties, the thickness of the sample, and its layer structure. The pulsed laser version-Opto-Thermal Transient Emission Radiometry (OTTER)-developed initially by Imhof et al [2,8,9], and consequently by Xiao et al [9][10][11][12][13][14][15][16][17][18][19], has been intensively used for skin and skin appendage measurements.…”

Structural and component mining of nails using bioengineering techniques

“…Opto-thermal radiometry (OTR) is an infrared remote sensing technique that was independently developed by Tam and co-workers in the 1980s [45,46]. Since then, it has been used for biomedical applications [47][48][49] as well as for industrial non-destructive testing, for example analysis of food samples [50].…”

“…By analysing the shape of the signal, properties of the sample can be evaluated, for example optical properties, thermal properties, thickness and the layer structure of the sample. The pulsed laser version, opto-thermal transient emission radiometry (OTTER) was developed initially by Imhof et al [46], and consequently, Xiao and co-workers used this technique intensively for skin and skin appendage measurements [51][52][53]. Furthermore, they were also the pioneers in using this technique to measure the water content, water concentration -depth profiles, as well as topically applied solvent (DMSO) penetration through the nails.…”