Key result
A combined hybrid application of photoplethysmography imaging and infrared thermography imaging is proposed for unobtrusive, long-term remote monitoring of vital parameters.
A combined hybrid application of PPGI and IRTI is proposed for unobtrusive, long-term remote monitoring of vital parameters.
May enable contactless vital sign monitoring in select settings; leaves open prospective validation before clinical use.
Photoplethysmography imaging (PPGI) and infrared thermography imaging (IRTI) are contactless camera-based measurement methods for monitoring a wide range of basic vital parameters. In particular, PPGI enhances the classical contact-based photoplethysmography. Approved evaluation algorithms of the well-established PPG method can easily be adapted for detection of heart rate, heart rate variability, respiration rate (RR), respiratory variability (RV), and vasomotional activity with PPGI. The IRTI method primarily records temperature distribution of the observed object, but information on RR and RV can also be derived from IRTI by analyzing the development of temperature distribution in the nasal region. The main advantages of both monitoring methods are unobtrusive data acquisition and the possibility of assessing spatial assignment between vital parameters and body region. Hence, these methods enable long-term monitoring or the monitoring of effects with special local characteristics. Because the two systems supplement each, a combined hybrid application is proposed and its feasibility discussed.
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Blanik et al. (2014) reported a review. Combined hybrid application of photoplethysmography imaging (PPGI) and infrared thermography imaging (IRTI) was evaluated. A combined hybrid application of photoplethysmography imaging and infrared thermography imaging is proposed for unobtrusive, long-term remote monitoring of vital parameters.