ArticleBiomedical optics express2018
Wearable speckle plethysmography (SPG) for characterizing microvascular flow and resistance.
Article in Biomedical optics express, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 27 papers.
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Who cites it
27 citing papers in PubMed.
- PPG-basis: A python-based toolbox for fast photoplethysmogram decomposition and reconstruction.Computer methods and programs in biomedicine · 2026Article
- Comparing multi- and single-exposure speckle contrast optical spectroscopy methods as estimators of blood flow in the diffuse regime.Journal of biomedical optics · 2026Article
- Optical methods for cuffless blood pressure measurements.Biophotonics discovery · 2026Review
- Speckle contrast optical spectroscopy for cuffless blood pressure estimation based on microvascular blood flow and volume oscillations.Biomedical optics express · 2025Article
- Non-invasive optical and laboratory hematologic biomarkers correlate in patients with sickle cell disease.Biomedical optics express · 2024Article
- Compact and cost-effective laser-powered speckle contrast optical spectroscopy fiber-free device for measuring cerebral blood flow.Journal of biomedical optics · 2024Article
- Intraprocedural application of a peripheral blood flow monitoring system during endovascular treatment for femoropopliteal disease.Journal of vascular surgery cases and innovative techniques · 2024Article
- Measuring pulsatile cortical blood flow and volume during carotid endarterectomy.Biomedical optics express · 2024Article
- Rolling shutter speckle plethysmography for quantitative cardiovascular monitoring.Biomedical optics express · 2024Article
- Quantifying tissue properties and absolute hemodynamics using coherent spatial imaging.Journal of biomedical optics · 2023Article
- The 2023 wearable photoplethysmography roadmap.Physiological measurement · 2023Review
- Pressure stimulus study on acupuncture points with multi-channel multimode-fiber diffuse speckle contrast analysis (MMF-DSCA).Biomedical optics express · 2023Article
- Development and evaluation of a wearable peripheral vascular compensation sensor in a swine model of hemorrhage.Biomedical optics express · 2023Article
- Quantitative hemodynamic imaging: a method to correct the effects of optical properties on laser speckle imaging.Neurophotonics · 2023Article
- Comparison between Speckle Plethysmography and Photoplethysmography during Cold Pressor Test Referenced to Finger Arterial Pressure.Sensors (Basel, Switzerland) · 2023Article
- Intrinsic, widefield optical imaging of hemodynamics in rodent models of Alzheimer's disease and neurological injury.Neurophotonics · 2023Review
- Simultaneous photoplethysmography and blood flow measurements towards the estimation of blood pressure using speckle contrast optical spectroscopy.Biomedical optics express · 2023Article
- Comparing Remote Speckle Plethysmography and Finger-Clip Photoplethysmography with Non-Invasive Finger Arterial Pressure Pulse Waves, Regarding Morphology and Arrival Time.Bioengineering (Basel, Switzerland) · 2023Article
- Camera-Derived Photoplethysmography (rPPG) and Speckle Plethysmography (rSPG): Comparing Reflective and Transmissive Mode at Various Integration Times Using LEDs and Lasers.Sensors (Basel, Switzerland) · 2022Article
- Harnessing the Power of Smart and Connected Health to Tackle COVID-19: IoT, AI, Robotics, and Blockchain for a Better World.IEEE internet of things journal · 2021Article
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Authors and funding
5 authors.
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Abstract
In this work we introduce a modified form of laser speckle imaging (LSI) referred to as affixed transmission speckle analysis (ATSA) that uses a single coherent light source to probe two physiological signals: one related to pulsatile vascular expansion (classically known as the photoplethysmographic (PPG) waveform) and one related to pulsatile vascular blood flow (named here the speckle plethysmographic (SPG) waveform). The PPG signal is determined by recording intensity fluctuations, and the SPG signal is determined via the LSI dynamic light scattering technique. These two co-registered signals are obtained by transilluminating a single digit (e.g. finger) which produces quasi-periodic waveforms derived from the cardiac cycle. Because PPG and SPG waveforms probe vascular expansion and flow, respectively, in cm-thick tissue, these complementary phenomena are offset in time and have rich dynamic features. We characterize the timing offset and harmonic content of the waveforms in 16 human subjects and demonstrate physiologic relevance for assessing microvascular flow and resistance.
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