Results 71 to 80 of about 7,588 (215)

Intraoperative Imaging of Cortical Blood Flow by Camera-Based Photoplethysmography at Green Light

Applied Sciences, 2020
Intraoperative evaluation of blood perfusion in the brain cortex is an important but hitherto unresolved problem. Our aim was to demonstrate the feasibility of cerebral microcirculation assessment during open brain surgery by using camera-based ...
Oleg V. Mamontov, Anton V. Shcherbinin, Roman V. Romashko, Alexei A. Kamshilin   +3 more
doaj   +1 more source

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, Sabharval, Ashutosh, Veeraraghavan, Ashok   +2 more
core   +1 more source

Alterations in electrodermal activity and cardiac parasympathetic tone during hypnosis [PDF]

, 2015
Exploring autonomic nervous system (ANS) changes during hypnosis is critical for understanding the nature and extent of the hypnotic phenomenon and for identifying the mechanisms underlying the effects of hypnosis in different medical conditions.
Kekecs, Z, Szekely, A, Varga, K
core   +1 more source

Dynamic Mode Decomposition (DMD) for Low‐Latency Real‐Time Cardiac MRI

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose To demonstrate dynamic mode decomposition (DMD) for high spatiotemporal low‐latency online reconstruction in 2D real‐time cardiac MRI. Methods DMD was applied to 2D spiral balanced steady state free precession (bSSFP) real‐time adult and fetal cardiac MRI at 0.55 T, with data from 10 healthy adult volunteers (3F/7M; age: 21–49; BMI: 20–
Ecrin Yagiz, Bilal Tasdelen, Ibrahim K. Ozaslan, Mihailo R. Jovanovic, Ye Tian, Krishna S. Nayak   +5 more
wiley   +1 more source

Nurses’ and patients’ experiences and preferences of the Ankle-Brachial Pressure Index and Multi-site Photoplethysmography for the diagnosis of peripheral arterial disease: A qualitative study [PDF]

, 2019
Peripheral arterial disease is a global health problem, affecting around 20% of people aged over 60 years. Whilst ankle-brachial pressure index (ABPI) is regularly used for diagnosis, it has a number of limitations, which have presented a need for ...
Allen, John, Lecouturier, Jan, Rousseau, Nikki, Scott, Jason, Sims, Andrew, Stansby, Gerard, Wilson, Lesley   +6 more
core   +2 more sources

Portable Radar for Noncontact Heart Rate Monitoring and Estrus Detection in Dairy Cows

IEEJ Transactions on Electrical and Electronic Engineering, EarlyView.
This study introduces a portable radar system for real‐time monitoring of respiratory and heart rates in dairy cows. It uses millimeter‐wave Frequency Modulated Continuous Wave (FMCW) radar to perform noncontact physiological sensing, reducing behavioral disturbance. The radar system's design prioritizes portability, cost‐effectiveness, and robustness,
Yingxiu Li, Ranran Wang, Fuyang Tian, Yudao Li, Zhuolin Wang, Yuxin Yu, Liping Ma, Xin Lu   +7 more
wiley   +1 more source

Photoplethysmography upon cold stress—impact of measurement site and acquisition mode

Frontiers in Physiology, 2023
Photoplethysmography (PPG) allows various statements about the physiological state. It supports multiple recording setups, i.e., application to various body sites and different acquisition modes, rendering the technique a versatile tool for various ...
Vincent Fleischhauer, Jan Bruhn, Stefan Rasche, Sebastian Zaunseder, Sebastian Zaunseder   +4 more
doaj   +1 more source

Spatial averaging method based on adaptive weight for imaging photoplethysmography

Journal of Biomedical Optics, 2023
Imaging photoplethysmography (iPPG) is a non-contact measuring technology for several physiological parameters reflecting personal health status without a special sensor. However, the pulse signal obtained using the iPPG usually is contaminated by various noises, and the intensity of the interesting pulse signal is relatively weak compared to the ...
Ryu, JongSong, Ryu, HyonSam, Liang, Shili, Hong, SunChol, Lian, Yueqi, Zheng, Zong   +5 more
openaire   +2 more sources

Technologies for equine welfare and performance monitoring under field conditions – Where do we stand?

Equine Veterinary Journal, EarlyView.
Abstract The need for comprehensive equine welfare assessments has become particularly evident amid ongoing debates about the social licence to operate in equestrian sports. During exercise, multiple physiological systems, principally the cardiovascular, respiratory, muscular, thermoregulatory, endocrine, and locomotory systems, undergo complex ...
Rhana Mackie Aarts, Esther W. Siegers, Filipe M. Serra Braganca, P. René van Weeren   +3 more
wiley   +1 more source

Time-Series U-Net With Recurrence for Noise-Robust Imaging Photoplethysmography

IEEE Access
Remote estimation of vital signs enables health monitoring for situations in which contact-based devices are either not available, too intrusive, or too expensive. In this paper, we present a modular pipeline for pulse signal estimation from video of the
Vineet R. Shenoy, Shaoju Wu, Armand Comas, Suhas Lohit, Hassan Mansour, Tim K. Marks   +5 more
doaj   +1 more source