By Jozef Živčák, Radovan Hudák, Ladislav Madarász, Imre J. Rudas
This e-book offers the method and methods of thermographic purposes with concentration totally on clinical thermography applied for parametrizing the diagnostics of the human physique. the 1st a part of the ebook describes the fundamentals of infrared thermography, the chances of thermographic diagnostics and the actual nature of thermography. the second one part comprises instruments of clever engineering utilized for the fixing of chosen purposes and tasks. Thermographic diagnostics was once utilized to problematics of paraplegia and tetraplegia and carpal tunnel syndrome (CTS). the result of the learn actions have been created with the cooperation of the 4 initiatives in the Ministry of schooling, technological know-how, learn and activity of the Slovak Republic entitled electronic keep watch over of advanced structures with levels of freedom, revolutionary equipment of schooling within the zone of keep an eye on and modeling of advanced item orientated structures on airplane turbocompressor engines, heart for study of keep watch over of technical, environmental and human dangers for everlasting improvement of construction and items in mechanical engineering and learn of latest diagnostic tools in invasive implantology.
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Additional resources for Methodology, Models and Algorithms in Thermographic Diagnostics
38). In measurements m applied for medical purposes, the emissivitty value of human skin's is used u and its value is 0,98 . Principally, there existt three secondary sources of thermal energy that diffe fer from each other in spectraal source emittance depending on wavelength: perfectly emitting surrface (a black body), where ελ = ε = 1. These objects sso not reflect but absorb b all the energy and re-emit it as infrared energy • surfaces reflecting IR R energy (a gray body), where where ελ = ε =1 constannt < 1, • selective radiant.
Of course, a combination of particular types of heat exchange with the environment may occur. There are also situations in which the thermoregulation of body surface is not working, when the temperature in a closed environment is too high, when the temperature is not lowered through conduction or convection, or when radiation is limited. In such cases, only evaporation by perspiration prevents the organism from overheating. But when there is high humidity in such environment, evaporation may also fail.
Thermo-reception central receptors peripheral thermoreceptors in the skin sspinal cord thermoreceptors cold receptors Fig. 34 Block diagram of thee thermo-reception principle heat receptors 36 3 Physical Nature of Thermography In comparison with contact analyzer, thermal signalization is localized diffusely, not precisely. The interaction of measured values takes place in the structures at the back of the hypothalamus. Together with periphery skin thermo-receptors, in the area of the front of the hypothalamus, areas carrying out inner thermo-reception have been identified (central thermo-receptors) which increase heat disbursement and heat creation of an organism.