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1. Full Text Non-contact, automated cardiac pulse measurements using video imaging and blind source separation
by Poh, Ming-Zher and McDuff, Daniel J and Picard, Rosalind W
Optics Express, ISSN 1094-4087, 05/2010, Volume 18, Issue 10, pp. 10762 - 10774
Remote measurements of the cardiac pulse can provide comfortable physiological assessment without electrodes. However, attempts so far are non-automated,... 
FACE DETECTION | PHOTOPLETHYSMOGRAPHY | HEART-RATE | OPTICS | ARTIFACTS | Colorimetry - methods | Reproducibility of Results | Humans | Image Interpretation, Computer-Assisted - methods | Face - physiology | Face - blood supply | Pulse - methods | Sensitivity and Specificity | Video Recording - methods | Face - anatomy & histology | Heart Rate - physiology | Electrocardiography - methods | Pattern Recognition, Automated - methods | Photography - methods
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2. Full Text Clinical reliability and utility of skin perfusion pressure measurement in ischemic limbs—Comparison with other noninvasive diagnostic methods
by Yamada, Tetsuya, MD and Ohta, Takashi, MD and Ishibashi, Hiroyuki, MD and Sugimoto, Ikuo, MD and Iwata, Hirohide, MD and Takahashi, Masayuki, MD and Kawanishi, Jun, MD
Journal of Vascular Surgery, ISSN 0741-5214, 2008, Volume 47, Issue 2, pp. 318 - 323
Purpose We studied whether the measurement of skin perfusion pressure (SPP) is useful for evaluating ischemic limbs and predicting wound healing. Methods Two... 
Surgery | DIABETIC-PATIENTS | ULCERS | SURGERY | DISTAL BLOOD-PRESSURE | TOE PRESSURE | PHOTOELECTRIC TECHNIQUE | AMPUTATION LEVEL | ISOTOPE WASHOUT | PERIPHERAL VASCULAR DISEASE | ARTERIAL OCCLUSIVE DISEASE | SELECTION | FLOW | Blood Pressure | Leg Ulcer - physiopathology | Toes - blood supply | Predictive Value of Tests | Humans | Middle Aged | Male | Blood Gas Monitoring, Transcutaneous | Wound Healing | Arteriosclerosis Obliterans - complications | Ischemia - complications | Ultrasonography | Aged, 80 and over | Gangrene | Ankle - blood supply | Female | Retrospective Studies | Ischemia - diagnostic imaging | Leg Ulcer - etiology | Severity of Illness Index | Reproducibility of Results | Arteriosclerosis Obliterans - diagnostic imaging | Ischemia - physiopathology | Laser-Doppler Flowmetry | Ischemia - diagnosis | Regional Blood Flow | Skin - blood supply | Extremities - blood supply | Photoplethysmography | ROC Curve | Aged | Arteriosclerosis Obliterans - physiopathology | Ischemia - etiology
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3. Full Text A clinical method for quantification of tissue microvascular blood perfusion in absolute terms [blood-volume/(time·tissue-area)]
by Flower, Robert W and Kling, Ronn
Microvascular Research, ISSN 0026-2862, 11/2017, Volume 114, pp. 92 - 100
Fluorescence-mediated photoplethysmography (FM-PPG) was developed to facilitate determination of tissue microvascular (capillary) blood perfusion, requiring... 
Predictive Value of Tests | Models, Cardiovascular | Humans | Perfusion Imaging - methods | Choroid - blood supply | Indocyanine Green - administration & dosage | Macaca fascicularis | Photoplethysmography - methods | Regional Blood Flow | Feasibility Studies | Skin - blood supply | Microcirculation | Algorithms | Animals | Forearm | Image Processing, Computer-Assisted | Time Factors | Angiography - methods | Blood Flow Velocity | Blood Volume | Fluorescent Dyes - administration & dosage | Optical Imaging - methods | Fluorescence | Medical colleges | Skin | Methods
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4. Full Text Hybrid optical imaging technology for long-term remote monitoring of skin perfusion and temperature behavior
by Blanik, Nikolai and Abbas, Abbas K and Venema, Boudewijn and Blazek, Vladimir and Leonhardt, Steffen
Journal of Biomedical Optics, ISSN 1083-3668, 1/2014, Volume 19, Issue 1, pp. 016012 - 016012
Photoplethysmography imaging (PPGI) and infrared thermography imaging (IRTI) are contactless camera-based measurement methods for monitoring a wide range of... 
Infrared thermography | Skin perfusion | Hybrid image sensor | Photoplethysmography imaging | Skin temperature | infrared thermography | PHOTOPLETHYSMOGRAPHY | hybrid image sensor | skin temperature | photoplethysmography imaging | ALGORITHM | BIOCHEMICAL RESEARCH METHODS | skin perfusion | OPTICS | RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING | Heart Rate | Infant Care - methods | Reproducibility of Results | Temperature | Respiratory Rate | Humans | Calibration | Equipment Design | Photoplethysmography - methods | Algorithms | Perfusion | Telemedicine - methods | Monitoring, Physiologic - methods | Signal Processing, Computer-Assisted | Thermography - methods | Optics and Photonics | Infant, Newborn | Optical Imaging - methods | Skin - pathology | Skin Temperature | Heart rate | Temperature distribution | Infrared | Imaging | Measurement methods | Feasibility | Respiration | Monitoring
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5. Full Text Noncontact Monitoring Breathing Pattern, Exhalation Flow Rate and Pulse Transit Time
by Dangdang Shao and Yuting Yang and Chenbin Liu and Tsow, Francis and Hui Yu and Nongjian Tao
IEEE Transactions on Biomedical Engineering, ISSN 0018-9294, 11/2014, Volume 61, Issue 11, pp. 2760 - 2767
We present optical imaging-based methods to measure vital physiological signals, including breathing frequency (BF), exhalation flow rate, heart rate (HR), and... 
pulse transit time (PTT) | Heart beat | Noise | Mobile health | physiological signal detection | photoplethysmography (PPG) | Cameras | remote sensing | respiration | Frequency measurement | Biomedical monitoring | photoplethysmography (PPG),physiological signal detection | SYSTEM | ENGINEERING, BIOMEDICAL | TOES | WAVE VELOCITY | ARTERIES | ULTRASOUND | FINGERS | EARS | Remote Sensing Technology - methods | Humans | Male | Pulse Wave Analysis - methods | Photoplethysmography - methods | Young Adult | Algorithms | Exhalation - physiology | Telemedicine - methods | Heart Rate - physiology | Monitoring, Physiologic - methods | Signal Processing, Computer-Assisted | Adult | Female | Measurement | Signal processing | Usage | Analysis | Imaging systems
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6. Full Text Robust Pulse Rate From Chrominance-Based rPPG
by de Haan, Gerard and Jeanne, Vincent
IEEE Transactions on Biomedical Engineering, ISSN 0018-9294, 10/2013, Volume 60, Issue 10, pp. 2878 - 2886
Remote photoplethysmography (rPPG) enables contactless monitoring of the blood volume pulse using a regular camera. Recent research focused on improved motion... 
Image color analysis | Color | photoplethysmography (PPG) | Cameras | remote sensing | Skin | Robustness | Biomedical monitoring | image analysis | Blood | Signal to noise ratio | ENGINEERING, BIOMEDICAL | Skin Physiological Phenomena | Colorimetry - methods | Reproducibility of Results | Algorithms | Humans | Sensitivity and Specificity | Blood Flow Velocity | Diagnosis, Computer-Assisted - methods | Heart Rate - physiology | Photoplethysmography - methods | Photography - methods | Diagnostic imaging | Research | Mathematical statistics | Analysis | Remote sensing
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7. Full Text Remote Detection of Photoplethysmographic Systolic and Diastolic Peaks Using a Digital Camera
by McDuff, Daniel and Gontarek, Sarah and Picard, Rosalind W
IEEE Transactions on Biomedical Engineering, ISSN 0018-9294, 12/2014, Volume 61, Issue 12, pp. 2948 - 2954
We present a new method for measuring photoplethysmogram signals remotely using ambient light and a digital camera that allows for accurate recovery of the... 
Biomedical measurement | Photoplethysmography | Digital cameras | Heart rate variability | Morphology | Blood volume pulse | morphology | remote | heart rate variability | ENGINEERING, BIOMEDICAL | NONCONTACT | Reproducibility of Results | Diastole | Humans | Blood Volume - physiology | Male | Face - physiology | Systole | Photoplethysmography - methods | Face - blood supply | Blood Pressure Determination - methods | Young Adult | Blood Volume Determination - methods | Algorithms | Sensitivity and Specificity | Video Recording - methods | Adolescent | Diagnosis, Computer-Assisted - methods | Face - anatomy & histology | Adult | Female | Blood Pressure - physiology | Photography - methods | Waveforms | Usage | Electronic cameras | Analysis
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8. Full Text Review of near-infrared methods for wound assessment
by Sowa, Michael G and Kuo, Wen-Chuan and Ko, Alex C-T and Armstrong, David G
Journal of Biomedical Optics, ISSN 1083-3668, 9/2016, Volume 21, Issue 9, pp. 091304 - 091304
Wound management is a challenging and costly problem that is growing in importance as people are living longer. Instrumental methods are increasingly being... 
near-infrared imaging | remodeling | photoplethysmography | proliferation | inflammation | optical coherence tomography | nonlinear optical imaging | fluorescence angiography | QUANTITATIVE-EVALUATION | HUMAN SKIN | BIOCHEMICAL RESEARCH METHODS | BLOOD-FLOW | IMAGING TECHNOLOGIES | IN-VIVO | 2ND-HARMONIC GENERATION | MULTIPHOTON MICROSCOPY | OPTICS | INDOCYANINE GREEN ANGIOGRAPHY | PERIPHERAL ARTERIAL-DISEASE | RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING | Angiography | Humans | Wounds and Injuries - diagnostic imaging | Wound Healing - physiology | Spectroscopy, Near-Infrared - methods | Fluorescent Dyes - therapeutic use | Optical Imaging - methods
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9. Full Text Non-invasive monitoring of blood glucose using optical methods for skin spectroscopy—opportunities and recent advances
by Delbeck, Sven and Vahlsing, Thorsten and Leonhardt, Steffen and Steiner, Gerald and Heise, H Michael
Analytical and Bioanalytical Chemistry, ISSN 1618-2642, 1/2019, Volume 411, Issue 1, pp. 63 - 77
Diabetes mellitus is a widespread disease with greatly rising patient numbers expected in the future, not only for industrialized countries but also for... 
Biochemistry, general | Food Science | Color sensing | Multivariate calibration | Laboratory Medicine | Vibrational spectroscopy | Chemistry | Analytical Chemistry | Monitoring/Environmental Analysis | Non-invasive glucose sensing | Characterization and Evaluation of Materials | Photoplethysmography | Validation studies | Blood sugar monitoring | Spectrum analysis | Methods | Spectroscopy | Complications | Diabetes mellitus | Spectral signatures | Health risks | Optics | Calibration | Glucose | Infrared signatures | Background noise | Blood | Blood levels | Wavelengths | Diabetes | Monitoring
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10. Full Text Noninvasive Diagnostic Methods for Better Screening of Peripheral Arterial Disease
by Nirala, Neelamshobha and Periyasamy, Rajdurai and Kumar, Awanish
Annals of Vascular Surgery, ISSN 0890-5096, 10/2018, Volume 52, pp. 263 - 272
Peripheral arterial disease (PAD) is a common circulatory problem in which narrowed arteries reduce blood flow to extremities, usually legs. It does not... 
SURGERY | CRITICAL LIMB ISCHEMIA | TYPE-2 DIABETIC-PATIENTS | BILATERAL PHOTOPLETHYSMOGRAPHY | OCCLUSIVE DISEASE | LOWER-EXTREMITIES | SYSTOLIC PRESSURES | ANKLE-BRACHIAL INDEX | PERIPHERAL VASCULAR DISEASE | AMERICAN-HEART-ASSOCIATION | VASCULAR-DISEASE | PRESSURE INDEX | Predictive Value of Tests | Reproducibility of Results | Prognosis | Ankle Brachial Index | Humans | Risk Factors | Regional Blood Flow | Diabetic Angiopathies - therapy | Peripheral Arterial Disease - therapy | Peripheral Arterial Disease - physiopathology | Diabetic Angiopathies - physiopathology | Peripheral Arterial Disease - diagnosis | Peripheral Arterial Disease - epidemiology | Diabetic Angiopathies - diagnosis | Diabetic Angiopathies - epidemiology | Photoplethysmography | Hemodynamics
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11. Full Text On the benefits of alternative color spaces for noncontact heart rate measurements using standard red-green-blue cameras
by Tsouri, Gill R and Li, Zheng
Journal of Biomedical Optics, ISSN 1083-3668, 4/2015, Volume 20, Issue 4, pp. 048002 - 048002
Existing video plethysmography methods use standard red-green-blue (sRGB) video recordings of the facial region to estimate heart pulse rate without making... 
biomedical optics | color spaces | signal processing | video plethysmography | BIOCHEMICAL RESEARCH METHODS | OPTICS | RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING | Humans | Image Interpretation, Computer-Assisted - methods | Middle Aged | Colorimetry - instrumentation | Male | Photography - instrumentation | Equipment Design | Young Adult | Sensitivity and Specificity | Heart Rate - physiology | Adult | Female | Image Enhancement - methods | Photography - methods | Diagnostic Techniques, Cardiovascular - instrumentation | Colorimetry - methods | Reproducibility of Results | Color | Photoplethysmography - methods | Video Recording - instrumentation | Algorithms | Photoplethysmography - instrumentation | Video Recording - methods | Adolescent | Equipment Failure Analysis
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12. Full Text A Novel Algorithm for Remote Photoplethysmography: Spatial Subspace Rotation
by Wenjin Wang and Stuijk, Sander and de Haan, Gerard
IEEE Transactions on Biomedical Engineering, ISSN 0018-9294, 09/2016, Volume 63, Issue 9, pp. 1974 - 1984
In this paper, we propose a conceptually novel algorithm, namely "Spatial Subspace Rotation" (2SR), that improves the robustness of remote... 
Color | Cameras | Photoplethysmography | remote sensing | Skin | Robustness | Biomedical monitoring | Blood | colors | photoplethysmography | ENGINEERING, BIOMEDICAL | NONCONTACT | Blood Volume Determination - methods | Colorimetry - methods | Reproducibility of Results | Algorithms | Skin - anatomy & histology | Monitoring, Ambulatory - methods | Sensitivity and Specificity | Blood Volume - physiology | Skin Pigmentation - physiology | Photoplethysmography - methods | Rotation | Photography - methods | Medical equipment | Usage | Research | Cardiology | Physiological apparatus | Frequency spectrum | Benchmarking | Subspaces | Masks | Analysis of variance | Matlab
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13. Full Text Multi-Mode Particle Filtering Methods for Heart Rate Estimation From Wearable Photoplethysmography
by Lee, Jinseok and Chung, Heewon and Lee, Hooseok
IEEE Transactions on Biomedical Engineering, ISSN 0018-9294, 10/2019, Volume 66, Issue 10, pp. 2789 - 2799
Objective: Obtaining accurate estimates of instantaneous heart rates (HRs) using reflectance-type photoplethysmography (PPG) sensors is challenging because the... 
Heart rate | Microsoft Windows | Filtering | Atmospheric measurements | motion artifacts | Estimation | reflectance-type photoplethysmography | Biomedical measurement | particle filter | Acceleration | Instantaneous heart rate | EXTRACTION | ENGINEERING, BIOMEDICAL | SIGNALS | FRAMEWORK | AGE
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14. Full Text Non-invasive monitoring of blood glucose using optical methods for skin spectroscopyopportunities and recent advances
by Delbeck, S and Vahlsing, T and Leonhardt, S and Steiner, G and Heise, HM
ANALYTICAL AND BIOANALYTICAL CHEMISTRY, ISSN 1618-2642, 01/2019, Volume 411, Issue 1, pp. 63 - 77
Diabetes mellitus is a widespread disease with greatly rising patient numbers expectedin the future, not only for industrialized countries but also for regions... 
CALIBRATION | CHEMISTRY, ANALYTICAL | Color sensing | Multivariate calibration | TISSUE | BIOCHEMICAL RESEARCH METHODS | SENSORS | Vibrational spectroscopy | INTENSIVE TREATMENT | Non-invasive glucose sensing | NEAR-INFRARED SPECTROSCOPY | Photoplethysmography | REFLECTANCE SPECTROSCOPY | Validation studies
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15. Full Text Simultaneous Monitoring of Ballistocardiogram and Photoplethysmogram Using a Camera
by Dangdang Shao and Tsow, Francis and Chenbin Liu and Yuting Yang and Nongjian Tao
IEEE Transactions on Biomedical Engineering, ISSN 0018-9294, 05/2017, Volume 64, Issue 5, pp. 1003 - 1010
We present a noncontact method to measure ballistocardiogram (BCG) and photoplethysmogram (PPG) simultaneously using a single camera. The method tracks the... 
Tracking | Biomedical measurement | Feature extraction | Cameras | remote sensing | photoplethysmogram (PPG) | Acceleration | Monitoring | Ballistocardiogram (BCG) | Signal to noise ratio | HEART | RPPG | CIRCULATION | ABNORMALITIES | ENGINEERING, BIOMEDICAL | NORMAL STANDARDS | AMPLITUDE | RECOIL | BLOOD-PRESSURE | Reproducibility of Results | Monitoring, Ambulatory - methods | Heart - physiology | Humans | Image Interpretation, Computer-Assisted - methods | Blood Volume - physiology | Face - physiology | Photoplethysmography - methods | Ballistocardiography - methods | Algorithms | Sensitivity and Specificity | Video Recording - methods | Face - anatomy & histology | Pattern Recognition, Automated - methods | Photography - methods | Image processing | Research | Accelerometers | Reproducibility | BCG | Waveforms | Optics | photoplethysmogram | ballistocardiogram
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16. Full Text Ballistocardiographic Artifacts in PPG Imaging
by Moco, Andreia Vieira and Stuijk, Sander and de Haan, Gerard
IEEE Transactions on Biomedical Engineering, ISSN 0018-9294, 09/2016, Volume 63, Issue 9, pp. 1804 - 1811
Objective: Photoplethysmography (PPG) is a noninvasive technique to measure the blood-volume pulse and derive various vital signs. Camera-based PPG imaging was... 
Artifacts | Ballistocardiography | Photoplethysmography | Cameras | Cardiography | PPG imaging | Light sources | ballistocardiography | ENGINEERING, BIOMEDICAL | Photometry - methods | Reproducibility of Results | Models, Cardiovascular | Humans | Blood Volume - physiology | Head Movements - physiology | Photoplethysmography - methods | Ballistocardiography - methods | Computer Simulation | Sensitivity and Specificity | Diagnosis, Computer-Assisted - methods | Lighting - methods | Medical equipment | Usage | Research | Cardiology | Physiological apparatus | Amplitudes | Head (anatomy) | Imaging | Illumination | Inertial | Assessments
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17. Full Text Algorithmic Principles of Remote PPG
by Wenjin Wang and den Brinker, Albertus C and Stuijk, Sander and de Haan, Gerard
IEEE Transactions on Biomedical Engineering, ISSN 0018-9294, 07/2017, Volume 64, Issue 7, pp. 1479 - 1491
This paper introduces a mathematical model that incorporates the pertinent optical and physiological properties of skin reflections with the objective to... 
Algorithm design and analysis | Image color analysis | photoplethysmography | Color | Cameras | remote sensing | Skin | Mathematical model | Biomedical monitoring | colors | Light sources | ENGINEERING, BIOMEDICAL | NONCONTACT | Remote Sensing Technology - methods | Colorimetry - methods | Reproducibility of Results | Monitoring, Ambulatory - methods | Humans | Image Interpretation, Computer-Assisted | Blood Volume - physiology | Photoplethysmography - methods | Blood Volume Determination | Photography | Skin Physiological Phenomena | Algorithms | Models, Biological | Computer Simulation | Light | Sensitivity and Specificity | Scattering, Radiation | Blood Flow Velocity - physiology | Signal processing | Usage | Mathematical models | Research | Robustness (mathematics) | Optical properties
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18. Full Text Use of ambient light in remote photoplethysmographic systems: comparison between a high-performance camera and a low-cost webcam
by Sun, Yu and Papin, Charlotte and Azorin-Peris, Vicente and Kalawsky, Roy and Greenwald, Stephen and Hu, Sijung
Journal of Biomedical Optics, ISSN 1083-3668, 03/2012, Volume 17, Issue 3, pp. 037005 - 0370010
Imaging photoplethysmography (PPG) is able to capture useful physiological data remotely from a wide range of anatomical locations. Recent imaging PPG studies... 
ambient light | noncontact | complementary metal oxide semiconductor camera | photoplethysmography | webcam | Ambient light | Photoplethysmography | Webcam | Complementary metal oxide semiconductor camera | Noncontact | BIOCHEMICAL RESEARCH METHODS | INTENSITY | SIGNALS | EXERCISE | LEISURE-TIME | HEART-DISEASE | REDUCTION | MEN | PHYSICAL-ACTIVITY | OPTICS | RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING | IMAGE REGISTRATION | Computers | Humans | Photography - economics | Male | Photography - instrumentation | Face - physiology | Image Processing, Computer-Assisted - methods | Photoplethysmography - methods | Pulse - instrumentation | Analysis of Variance | Pulse - methods | Lighting | Photoplethysmography - instrumentation | Heart Rate - physiology | Signal Processing, Computer-Assisted | Adult | Photography - methods | Photoplethysmography - economics | Webcams | Telemedicine | Imaging | Cameras | Spectra | Assessments | Standards | Contact
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19. Full Text Reflectance Photoplethysmography as Noninvasive Monitoring of Tissue Blood Perfusion
by Abay, Tomas Ysehak and Kyriacou, Panayiotis A
IEEE Transactions on Biomedical Engineering, ISSN 0018-9294, 09/2015, Volume 62, Issue 9, pp. 2187 - 2195
In the last decades, photoplethysmography (PPG) has been used as a noninvasive technique for monitoring arterial oxygen saturation by pulse oximetry (PO),... 
pulse oximetry | Estimation | Light emitting diodes | optical sensors | physiological monitoring | Blood | Reflectivity | near infrared spectroscopy (NIRS) | photoplethysmography | Fingers | Biomedical measurement | Probes | Beer-Lambert law | pulse oximetry (PO) | photoplethysmography (PPG) | near-infrared spectroscopy (NIRS) | PERIPHERAL PERFUSION | ENGINEERING, BIOMEDICAL | FOREARM | SKELETAL-MUSCLE OXYGENATION | PRINCIPLES | ARTERIAL | PULSE OXIMETRY | NEAR-INFRARED SPECTROSCOPY | INDEX | SATURATION | OCCLUSION | Humans | Male | Oximetry - methods | Spectroscopy, Near-Infrared - methods | Equipment Design | Photoplethysmography - methods | Young Adult | Photoplethysmography - instrumentation | Forearm - blood supply | Monitoring, Physiologic - methods | Signal Processing, Computer-Assisted | Adult | Female | Oxyhemoglobins - analysis | Patient monitoring | Observations | Oximetry | Methods | Perfusion (Physiology) | Innovations
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