Combining Chrominance Features and Fast ICA for Noncontact Imaging Photoplethysmography
IEEE Access, 2020 Video-based noncontact detection of heart rate has a wide range of applications in the field of medicine and health. However, this method is susceptible to noise interference, making it difficult to effectively extract blood volume pulse (BVP) signals ...
Ken Cai +4 more
doaj +1 more source
Dilution Effect for High‐Performance Multiple‐Component Near‐Infrared Organic Photodetectors
Advanced Science, EarlyView.The dilution effect in multi‐component organic photodetector effectively suppresses non‐radiative decay and minimizes dark current, while energy‐level‐offset‐governed electron transfer between acceptors maintains efficient charge transport. This synergistic mechanism collectively enables remarkable device performance, including high detectivity and ...
Zhuang Li +9 more
wiley +1 more source
Hybrid Optical Unobtrusive Blood Pressure Measurements
Sensors, 2017 Blood pressure (BP) is critical in diagnosing certain cardiovascular diseases such as hypertension. Some previous studies have proved that BP can be estimated by pulse transit time (PTT) calculated by a pair of photoplethysmography (PPG) signals at two ...
Guangfei Zhang +4 more
doaj +1 more source
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
core +3 more sources
Soft, Flexible, and Stretchable Platforms for Tissue‐Interfaced Bioelectronics
Advanced Science, EarlyView.Bio‐integrated electronics provide mechanically compliant and stable interfaces with soft biological tissues. Representative applications include neural interfaces, wet‐organadhesive electronics, and skin‐interfaced devices. E represents Young´s modulus and ε represents strain.
Kento Yamagishi +3 more
wiley +1 more source
Correlation Mapping of Perfusion Patterns in Cutaneous Tissue
Applied Sciences, 2022 Perfusion patterns of cutaneous tissue represent a valuable source of information about the state of the patient’s cardiovascular system and autonomic nervous system (ANS).
Patrik Procka +3 more
doaj +1 more source
A Pulsatile Optical Tissue Phantom for the Investigation of Light-Tissue Interaction in Reflectance Photoplethysmography [PDF]
, 2019 The aim of this study was to investigate the effect of emitter-detector separation distance and arterial depth in reflectance photoplethysmography (PPG), utilizing a homogenous pulsatile phantom that exhibits the broad optical absorbance and scattering ...
Kyriacou, P. A., May, J.M., Nomoni, M.
core +1 more source
Multimodal Wearable Biosensing Meets Multidomain AI: A Pathway to Decentralized Healthcare
Advanced Science, EarlyView.Multimodal biosensing meets multidomain AI. Wearable biosensors capture complementary biochemical and physiological signals, while cross‐device, population‐aware learning aligns noisy, heterogeneous streams. This Review distills key sensing modalities, fusion and calibration strategies, and privacy‐preserving deployment pathways that transform ...
Chenshu Liu +10 more
wiley +1 more source
ASSESSMENT OF CUTANEOUS BLOOD FLOW IN LOWER EXTREMITIES BY IMAGING PHOTOPLETHYSMOGRAPHY METHOD [PDF]
Научно-технический вестник информационных технологий, механики и оптики, 2019 Subject of Research. The paper presents effective application of the novel imaging photoplethysmography method for receiving data on reaction of peripheral blood flow in lower extremities on venous occlusion. Method.
Valeriy V. Zaytsev +2 more
doaj +1 more source
Video pulse rate variability analysis in stationary and motion conditions [PDF]
, 2018 Background: In the last few years, some studies have measured heart rate (HR) or heart rate variability (HRV) parameters using a video camera. This technique focuses on the measurement of the small changes in skin colour caused by blood perfusion.
Melchor Rodríguez, Angel +1 more
core +3 more sources