Results 51 to 60 of about 7,351 (197)
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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Noncontact imaging photoplethysmography to effectively access pulse rate variability [PDF]
Journal of Biomedical Optics, 2012 Noncontact imaging photoplethysmography (PPG) can provide physiological assessment at various anatomical locations with no discomfort to the patient. However, most previous imaging PPG (iPPG) systems have been limited by a low sample frequency, which restricts their use clinically, for instance, in the assessment of pulse rate variability (PRV). In the
Yu, Sun +4 more
openaire +2 more sources
Monitoring of Cardiorespiratory Signal: Principles of Remote Measurements and Review of Methods
IEEE Access, 2017 Physiological signs can be remotely observed from the physiological and physical effects caused by a cardiorespiratory activity. A wide range of research on remote cardiorespiratory monitoring systems has been done using different methods, including ...
Ali Al-Naji +3 more
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The effects of optical sensor-tissue separation in endocavitary photoplethysmography [PDF]
, 2018 Objective: Intestinal anastomotic failure that occurs mainly due to ischaemia is a serious risk in colorectal cancer patients undergoing surgery. Surgeons continue to rely on subjective methods such as visual inspection to assess intestinal viability ...
Kyriacou, P. A., Patel, Z., Thaha, M. A.
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Contactless Monitoring of Microcirculation Reaction on Local Temperature Changes
Applied Sciences, 2019 Assessment of skin blood flow is an important clinical task which is required to study mechanisms of microcirculation regulation including thermoregulation.
Maxim A. Volynsky +3 more
doaj +1 more source
Contact Surface Area: A Novel Signal for Heart Rate Estimation in Smartphone Videos
, 2019 We consider the problem of smartphone video-based heart rate estimation, which typically relies on measuring the green color intensity of the user's skin.
Fridovich-Keil, Sara, Ramadge, Peter J.
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Monitoring of the central blood pressure waveform via a conformal ultrasonic device. [PDF]
, 2018 Continuous monitoring of the central-blood-pressure waveform from deeply embedded vessels, such as the carotid artery and jugular vein, has clinical value for the prediction of all-cause cardiovascular mortality. However, existing non-invasive approaches,
Bhaskaran, Shubha +23 more
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DistancePPG: Robust non-contact vital signs monitoring using a camera
, 2015 Vital signs such as pulse rate and breathing rate are currently measured using contact probes. But, non-contact methods for measuring vital signs are desirable both in hospital settings (e.g. in NICU) and for ubiquitous in-situ health tracking (e.g.
Kumar, Mayank +2 more
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Advanced Healthcare Materials, EarlyView.Comparison of therapeutic and diagnostic applications of a surface‐emitting light source with multiwavelength emission characteristics. Abstract Conventional light‐emitting‐diode‐based light sources suffer from rigidity, localized heating, and poor adaptability to skin deformation, limiting their use in skin‐attached medical devices.
In Ho Kim +10 more
wiley +1 more source
A Reproducible Study on Remote Heart Rate Measurement [PDF]
, 2017 This paper studies the problem of reproducible research in remote photoplethysmography (rPPG). Most of the work published in this domain is assessed on privately-owned databases, making it difficult to evaluate proposed algorithms in a standard and ...
Anjos, André +2 more
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