Technology
VitalSelf.life face scan technology supports all skin types, based on Fitzpatrick's Skin Type Classification.
Photoplethysmography (PPG)
Photoplethysmography (PPG) is a well-established, non-invasive optical technique used since 1942 for measuring physiological parameters by detecting volumetric changes in blood under the skin. It works by emitting light into the skin and measuring how much is absorbed or reflected by the blood vessels. PPG is commonly found in oximeters, wearable devices, and health monitors to track indicators such as heart rate, oxygen saturation, and blood pressure.
This low-cost, non-invasive method provides valuable insights into the cardiovascular system by detecting changes in blood volume with each heartbeat. By analysing these fluctuations in light absorption, PPG can assess various physiological characteristics, making it a key component in modern health and fitness monitoring technologies.
The primary difference between PPG (Photoplethysmography) and rPPG (remote Photoplethysmography) lies in how they detect and measure physiological signals:
1. PPG (Photoplethysmography):
- Contact-Based: PPG typically requires direct contact with the skin. Sensors (often found in wearable devices, fingertip pulse oximeters, or medical devices) emit light into the skin and measure the amount of light absorbed or reflected by the blood vessels beneath the surface. The pulsatile changes in blood volume, caused by the heartbeat, are detected through this interaction with light.
- Use Cases: PPG is commonly used for measuring heart rate, blood oxygen levels (SpO2), and sometimes blood pressure or cardiac output in a controlled or clinical environment.
2. rPPG (remote Photoplethysmography):
- Non-Contact/Remote: rPPG works without direct contact with the skin. Instead, it uses cameras to capture video footage of the skin (usually the face). By analyzing subtle color changes on the skin caused by blood flow, rPPG algorithms extract physiological signals. These signals are often processed using image processing techniques and machine learning algorithms to estimate heart rate and other metrics.
- Use Cases: rPPG is typically used in applications where non-invasive, non-contact monitoring is needed, such as in mobile health apps, remote monitoring, or wellness checks via webcams or smartphone cameras.
rPPG Smartphone Monitoring
rPPG FOR SMARTPHONE HEALTH MONITORING
Remote Photoplethysmography (rPPG) has gained attention as an innovative method for health monitoring using smartphone cameras. Unlike traditional PPG, which requires contact with the skin, rPPG analyzes subtle color changes in facial skin captured via video. This non-contact approach enables the extraction of vital signs such as heart rate, heart rate variability (HRV), oxygen saturation, and even blood pressure.
The appeal of rPPG in smartphones lies in its accessibility and convenience. Most modern smartphones are equipped with high-quality cameras, making them ideal tools for monitoring health on the go. Users can simply take a video selfie, and the rPPG algorithms analyze the video in real-time to provide accurate health insights.
This technology is particularly useful for remote healthcare and telemedicine, as it allows for easy, at-home monitoring without the need for additional devices or wearables. It can facilitate early detection of health issues, track fitness progress, and even support chronic disease management, all through a widely available consumer device.
Scanning conditions are important when working with rPPG. Lighting conditions, movement, need to controlled to ensure accuracy. Our advanced image processing, AI, and our algorythms ensure these issues are mitigated.
rPPG: Contactless Monitoring
PHOTOPLETHYSMOGRAPHY (rPPG): THE FUTURE OF CONTACTLESS HEALTH MONITORING
Human vital signs are crucial indicators of both our physical and mental health. Thanks to advancements in image processing technologies like Remote Photoplethysmography (rPPG), it is now possible to capture these vital data without physical contact, using only an optical sensor.
(rPPG)
Remote Photoplethysmography (rPPG) is an innovative, non-contact, and cost-effective technology for assessing vital signs through video analysis. By analyzing light reflected from a user’s face, rPPG measures key physiological indicators such as heart rate and oxygen saturation.
Unlike traditional photoplethysmography (PPG), which requires direct contact with the skin using devices like pulse oximeters or smartwatches, rPPG operates remotely. It uses visible light from the environment to detect subtle changes in skin colour, caused by blood flow. This allows vital signs to be measured simply by analysing a video of the user's face - either in real-time or from pre-recorded footage.
VITAL SIGNS MEASURED BY rPPG
rPPG can monitor a range of vital signs, including:
- Heart Rate (HR)
- Heart Rate Variability (HRV)
- Respiratory Rate
- Oxygen Saturation (SpO2)
Additionally, rPPG can assess HRV, sleep quality, heart rhythm irregularities, and even stress levels and mental health status.
KEY APPLICATIONS OF rPPG
- Contactless Vital Signs Monitoring - rPPG has enabled hospitals and clinics to monitor vital signs without physical contact. Using a simple video camera - such as one on a smartphone - healthcare practitioners can remotely assess patients, prioritize urgent cases, and track changes in a patient's health over time. This screening technology reduces the need for physical devices and improves efficiency in healthcare settings.
- Enhanced Access for Remote and Low-Income Populations - With rPPG technology integrated into smartphones, healthcare becomes more accessible for those in remote or underserved areas. Individuals can use their mobile phones to connect with healthcare providers and receive medical attention without needing to visit a hospital or clinic unless strictly neccessary. This is especially beneficial for low-income families and those in resource-limited locations.
- Broader Access to Care Services - Due to its simplicity and affordability, rPPG technology can expand access to a wide range of care services, including childcare, senior care, chronic disease management, and mental health services. It provides a convenient solution for monitoring vital signs in various healthcare settings, even extending into home care and telehealth.
CONCLUSION
The development of rPPG technology marks a significant leap in health monitoring, making it possible to integrate healthcare into everyday life outside of traditional settings. By offering contactless, affordable, and widely accessible health solutions, rPPG has the potential to transform telehealth and revolutionize the way we think about healthcare. Its applications extend far beyond conventional wellness, offering new possibilities for monitoring and care across diverse populations and industries.
SKIN TYPES
VitalSelf face scan technology supports all skin types, based on Fitzpatrick's Skin Type Classification.
CONCLUSION
The development of rPPG technology marks a significant leap in health monitoring, making it possible to integrate healthcare into everyday life outside of traditional settings.
By offering contactless, affordable, and widely accessible health solutions, rPPG has the potential to transform telehealth and revolutionize the way we think about healthcare. Its applications extend far beyond conventional wellness, offering new possibilities for monitoring and care across diverse populations and industries.
⚠️ Important Disclaimer: Vitalself scan results are screening indicators only and do not constitute a medical diagnosis. The rPPG and AI-derived parameters in the scans are not a medical diagnostic device. Always consult a qualified healthcare professional before making any changes to your health management, starting or stopping any medication, or if you have any concerns about your results. In an emergency, contact your nearest emergency services immediately.