Key result
A novel pulse transit time estimation method using dual-camera photoplethysmographic imaging exhibited a good correlation with established methodological standards.
Why the study?
Does a dual-camera PPGi-based method accurately estimate pulse transit time compared to standard methods?
Does a dual-camera PPGi-based method accurately estimate pulse transit time compared to standard methods?
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A novel dual-camera PPGi method demonstrates good correlation with standard methods for estimating pulse transit time, suggesting potential for smartphone-based vascular monitoring.
Pulse transit time (PTT) is an important physiological parameter that directly correlates with the elasticity and compliance of vascular walls and variations in blood pressure. This paper presents a PTT estimation method based on photoplethysmographic imaging (PPGi). The method utilizes two opposing cameras for simultaneous acquisition of PPGi waveform signals from the index fingertip and the forehead temple. An algorithm for the detection of maxima and minima in PPGi signals was developed, which includes technology for interpolation of the real positions of these points. We compared our PTT measurements with those obtained from the current methodological standards. Statistical results indicate that the PTT measured by our proposed method exhibits a good correlation with the established method. The proposed method is especially suitable for implementation in dual-camera-smartphones, which could facilitate PTT measurement among populations affected by cardiac complications.
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Liu et al. (2015) studied this question. Pulse transit time (PTT) estimation method based on dual-camera photoplethysmographic imaging (PPGi) vs. Current methodological standards for PTT measurement was evaluated on Correlation of PTT measurements with established methods. A novel pulse transit time estimation method using dual-camera photoplethysmographic imaging exhibited a good correlation with established methodological standards.
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