ArticleScientific reports2015
A new look at the essence of the imaging photoplethysmography.
Article in Scientific reports, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 85 papers, 3 of them syntheses that pooled it.
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The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
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Who cites it
85 citing papers in PubMed, 3 syntheses or guidelines pooled it, 240 citations in OpenAlex.
- Contactless Technologies, Sensors, and Systems for Cardiac and Respiratory Measurement during Sleep: A Systematic Review.Sensors (Basel, Switzerland) · 2023Pooled it
- Effectiveness of consumer-grade contactless vital signs monitors: a systematic review and meta-analysis.Journal of clinical monitoring and computing · 2022Pooled it
- Recent Academic Research on Clinically Relevant Digital Measures: Systematic Review.Journal of medical Internet research · 2021Pooled it
- Initial evaluation of prospective cardiac triggering using photoplethysmography signals recorded with a video camera compared to pulse oximetry and electrocardiography at 7T MRI.Biomedical engineering online · 2016Trial
- Missed isochromatic cardiac pulsation in remote photoplethysmography: detection, impact, and removal.Biomedical optics express · 2026Article
- Local heating induces an increase in the pulse wave velocity in peripheral vessels.Scientific reports · 2026Article
- Differential sensitivity of impedance plethysmography and photoplethysmography sensors to temperature-induced peripheral vasoconstriction.Scientific reports · 2026Article
- Optical methods for cuffless blood pressure measurements.Biophotonics discovery · 2026Review
- Imaging photoplethysmography reveals differences in the reactions of cerebral and systemic hemodynamics to infusion of vasoactive drugs.Frontiers in physiology · 2026Article
- Evaluation of a polarization-sensitive, dual-wavelength wearable photoplethysmography sensor across a range of skin tones.Biophotonics discovery · 2026Article
- AI modeling photoplethysmography to electrocardiography useful for predicting cardiovascular disease.NPJ digital medicine · 2025Article
- Development of a Rotation-Robust PPG Sensor for a Smart Ring.Sensors (Basel, Switzerland) · 2025Article
- Advancing intraoperative cerebral blood flow monitoring: integrating imaging photoplethysmography and laser speckle contrast imaging in neurosurgery.Frontiers of optoelectronics · 2025Article
- Enhancing the quantification of post-occlusive reactive hyperemia: a multimodal optical approach.Pflugers Archiv : European journal of physiology · 2025Article
- Speckle contrast optical spectroscopy for cuffless blood pressure estimation based on microvascular blood flow and volume oscillations.Biomedical optics express · 2025Article
- A comprehensive review of heart rate measurement using remote photoplethysmography and deep learning.Biomedical engineering online · 2025Review
- Improvement of Microvascular Function in Patients with Morbid Obesity After Bariatric Surgery Revealed by Imaging Photoplethysmography.Obesity surgery · 2025Article
- Remote photoplethysmography (rPPG) in the wild: Remote heart rate imaging via online webcams.Behavior research methods · 2024Article
- Revisiting the Venoarteriolar Reflex-Further Insights from Upper Limb Dependency in Healthy Subjects.Biology · 2024Article
- Plethysmographic assessment of vasomotor response in patients with congestive heart failure before and after heart transplantation.Biomedical optics express · 2024Article
25 more citing papers are in PubMed but not listed here.
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
7 authors at 4 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Photoplethysmography (PPG) is a noninvasive optical method accepted in the clinical use for measurements of arterial oxygen saturation. It is widely believed that the light intensity after interaction with the biological tissue in vivo is modulated at the heartbeat frequency mainly due to pulsatile variations of the light absorption caused by arterial blood-volume pulsations. Here we report experimental observations, which are not consistent with this model and demonstrate the importance of elastic deformations of the capillary bed in the formation of the PPG waveform. These results provide new insight on light interaction with live tissue. To explain the observations we propose a new model of PPG in which pulse oscillations of the arterial transmural pressure deform the connective-tissue components of the dermis resulting in periodical changes of both the light scattering and absorption. These local changes of the light-interaction parameters are detected as variations of the light intensity returned to a photosensitive camera. Therefore, arterial pulsations can be indirectly monitored even by using the light, which slightly penetrates into the biological tissue.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.