A Multilayer Monte Carlo Model for the Investigation of Optical Path and Penetration Depth at Different Perfusion States of the Colon [PDF]
, 2019 There is a great interest in monitoring the oxygen supply delivered to the colon. Insufficient oxygen delivery may lead to hypoxia, sepsis, multiorgan dysfunction and death.
Chatterjee, S. +3 more
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Methods and systems for extracting venous pulsation and respiratory information from photoplethysmographs [PDF]
, 2019 A system and method for separating a venous component and an arterial component from a red signal and an infrared signal of a PPG sensor is provided.
Nourani, Mehrdad, Yousefi, Rasoul
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Remote Photoplethysmography for Evaluation of Cutaneous Sensory Nerve Fiber Function
Sensors, 2021 About 2% of the world’s population suffers from small nerve fiber dysfunction, neuropathy, which can result in severe pain. This condition is caused by damage to the small nerve fibers and its assessment is challenging, due to the lack of simple and ...
Zbignevs Marcinkevics +3 more
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Monte Carlo Analysis of Optical Interactions in Reflectance and Transmittance Finger Photoplethysmography [PDF]
, 2019 Photoplethysmography (PPG) is a non-invasive photometric technique that measures the volume changes in arterial blood. Recent studies have reported limitations in developing and optimising PPG-based sensing technologies due to unavailability of the ...
Anatomy +13 more
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Frontiers in Neuroscience, 2019 Accurate and practical assessment of the brain circulation is needed to adequately estimate the viability of cerebral blood flow regulatory mechanisms in various physiological conditions.
Olga A. Lyubashina +6 more
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Motion limitations of non-contact photoplethysmography due to the optical and topological properties of skin [PDF]
, 2016 Non-contact photoplethysmography (PPG) provides multiple benefits over in-contact methods, but is not as tolerant to motion due to the lack of mechanical coupling between the subject and sensor.
Alametsä J +10 more
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Blood Cell Classification Using the Hough Transform and Convolutional Neural Networks [PDF]
, 2018 https://doi.org/10.1007/978-3-319-77712-2_62The detection of red blood cells in blood samples can be crucial for the disease detection in its early stages.
Luque-Baena, Rafael Marcos +4 more
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Review of deep learning methods for imaging photoplethysmography data processing
Научно-технический вестник информационных технологий, механики и оптикиThis paper presents a review of contemporary deep learning methods for processing remote photoplethysmography data. Architectures of convolutional neural networks, transformers, recurrent, and generative models are examined for video signal preprocessing
I. M. Rubin, M. A. Volynsky
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Improvements in Remote Cardiopulmonary Measurement Using a Five Band Digital Camera [PDF]
, 2014 Remote measurement of the blood volume pulse via photoplethysmography (PPG) using digital cameras and ambient light has great potential for healthcare and affective computing. However, traditional RGB cameras have limited frequency resolution. We present
Gontarek, Sarah +2 more
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Spatiotemporal processing in photoplethysmography for skin microcirculatory perfusion imaging
Biomedical Optics Express, 2022 Technological advances in the real-time visualization of cutaneous microcirculation aim to realize benefits including high-resolution imaging, suppressed noise, and robust temporal coherence. Photoplethysmography (PPG), a noninvasive technique that measures single or multiple points of relative blood volume changes in blood vessels under the skin ...
Dongkai, Cheng +3 more
openaire +2 more sources