Use of IR thermography for bioheat transfer studies

Vainer, Boris G.; Belozerov, Petr; Baranov, V. K.

doi:10.21611/qirt.2004.049

Cited by 2 publications

(2 citation statements)

References 2 publications

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“…Some key thermophysical parameters of intermediate media (convection level, thermal conductivity, etc) affecting the surface thermal pattern while a heat flow propagates from a concealed heat source towards the surface can also be brought to light and estimated with the help of IRT. This problem is particularly important in studies of heat-mass exchange in living tissues [15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Focal plane array based infrared thermography in fine physical experiment

Vainer¹

2008

J. Phys. D: Appl. Phys.

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By two examples of dissimilar physical phenomena causing thermophysical effects, the unique capabilities of one of the up-to-date methods of experimental physics—focal plane array (FPA) based infrared (IR) thermography (IRT), are demonstrated distinctly. Experimenters inexperienced in IRT can grasp how this method provides a means for combining real-time visualization with quantitative analysis. A narrow-band short-wavelength IR camera was used in the experiments. It is discussed and stated that IRT is best matched and suited to the next two test conditions—when a heated specimen is thin and when heat is generated in the immediate region of a surface of a solid. The first prerequisite is realized in the search for directional patterns of combined low-power radiation sources with the use of the IRT-aided method. The second one is realized in studies of water vapour adsorption on uneven (irregular) surfaces of solid materials. With multiple swatches taken from a set of different fabrics and used as experimental samples, a sharp distinction between adsorptivities of their surfaces is strikingly illustrated by IRT time-domain measurements exhibiting the associated thermal effect ranging within an order of magnitude. It is justified that the described IRT-aided test can find practical implementation at least in the light industry. Emissivities of different fabrics are evaluated experimentally with the described reflection method based on the narrow spectral range of IRT. On the basis of direct IR observations, attention is paid to the need for close control over the surface temperature increase while the adsorption isotherms are being measured. Sensitivity of the FPA-based IRT method, as applied to examine the kinetics of initial stages of adsorption of gaseous molecules on the solid surface, is evaluated analytically and quantitatively. The relationship between the amount of adsorbate and the measurable excess of adsorbent temperature is found. It is discovered that the method makes it possible to control nano-quantities of the adsorbed matter, namely, it is sensitive to an incipient molecular film of 1/300-monolayer effective thickness.

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Section: Introductionmentioning

confidence: 99%

Focal plane array based infrared thermography in fine physical experiment

Vainer¹

2008

J. Phys. D: Appl. Phys.

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“…The associated processes can be physically modelled in the future having regard to the peculiarities of heat propagation in the human body [13][14][15]. We "asked" the computer code to track the changes in the sizes of two spots approaching each other, which were found by the algorithm described above (Sec.…”

Section: Coalescence Of Heat Spots During Their Spreading and Approacmentioning

confidence: 99%

Heterogeneous thermograms: the methods of attack

Vainer¹,

Moskalev²

2008

Proceedings of the 2008 International Conference on Quantitative InfraRed Thermography

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Pronouncedly inhomogeneous thermograms occur universally in infrared imaging applications. The heterogeneity as a separate characteristic of a 2D pattern merits detailed consideration and quantitative estimation. The present contribution is among the first works dedicated to solving this problem. In addition to the review and summarizing of previous results, a new computational method is developed for quantitative estimation of the thermal pattern inhomogeneity. Artificial and really measured thermograms are analyzed with the designed original software. An adequacy of the new method is confirmed.

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Use of IR thermography for bioheat transfer studies

Cited by 2 publications

References 2 publications

Focal plane array based infrared thermography in fine physical experiment

Focal plane array based infrared thermography in fine physical experiment

Heterogeneous thermograms: the methods of attack

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