The obtained physiological information could then be used to draw inferences about a variety of psychophysiological or affective states, as proved by the increasing number of psychophysiological studies using thermal infrared imaging.

Through bioheat modeling of facial thermal imagery, several vital signs can be extracted, including localized blood perfusion, cardiac pulse, breath rate, and sudomotor response, since all these parameters impact the cutaneous temperature.

Thermal infrared imaging has been proposed as a potential system for the computational assessment of human autonomic nervous activity and psychophysiological states in a contactless and noninvasive way. Thermal Infrared Imaging-Based Computational Psychophysiology for Psychometrics.Ĭardone, Daniela Pinti, Paola Merla, Arcangelo Finally, the significance of each of the key performance parameters of thermal imaging instruments will be reviewed and procedures currently used for testing to verify performance will be outlined. A discussion of how these parameters are extended and adapted to define the performance of thermal imaging instruments will be provided. The performance parameters (figures of merit) that define the quality of performance of infrared radiation thermometers will be introduced. The various scanning methods by which thermal images (thermograms) are generated will be reviewed. Infrared thermal imaging figures of meritĬommercially available types of infrared thermal imaging instruments, both viewers (qualitative) and imagers (quantitative) are discussed. In certain applications thermal imaging is shown to provide objective measurement of temperature changes that are clinically significant. Recent interest in the potential applications for fever screening is described, and some other areas of medicine where some research papers have included thermal imaging as an assessment modality. Finally, we review established and evolving medical applications for thermal imaging, including inflammatory diseases, complex regional pain syndrome and Raynaud's phenomenon. The credibility and acceptance of thermal imaging in medicine is subject to critical use of the technology and proper understanding of thermal physiology. Recent studies have investigated the influence of equipment and the methods of image recording. The technique essentially uses naturally emitted infrared radiation from the skin surface. This review describes the features of modern infrared imaging technology and the standardization protocols for thermal imaging in medicine.

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