Transdermal optical imaging
Transdermal optical imaging, also known as transdermal optical imagery[1] or TOI, is a method of detecting blood flow of the face by measuring hemoglobin concentration using a digital video camera.[2] Because of the translucent property of skin, light can travel beneath the skin and re-emit.[3] The re-emitted light from underneath the skin is affected by chromophores, mainly hemoglobin and melanin,[4] which differ in color.[5] The color difference allows TOI machine learning software to separate the images into layers, which are known as bitplanes. It extracts signals rich in hemoglobin and signals rich in melanin, then discards the melanin-rich signals to obtain a recording of hemoglobin changes under the skin.[6][7] Transdermal optical imaging has been proposed as an alternative to cuff-based methods of measuring blood pressure because it is able to measure heart rate accurately in a "contactless and non-invasive" way.[8] Transdermal optical imaging may be able to detect hidden emotions using the patterns of blood flow in the face.[5][9][1]
References
[edit]- ^ a b "Transdermal Optical Imagery (TOI) Hidden Emotions".
- ^ "Camera-Based Health Readings". TrendHunter.com. Retrieved 2021-02-10.
- ^ Liu, Jiangang; Luo, Hong; Zheng, Paul Pu; Wu, Si Jia; Lee, Kang (2018-07-12). "Transdermal optical imaging revealed different spatiotemporal patterns of facial cardiovascular activities". Scientific Reports. 8 (1): 10588. Bibcode:2018NatSR...810588L. doi:10.1038/s41598-018-28804-0. ISSN 2045-2322. PMC 6043515. PMID 30002447.
- ^ Nishidate, Izumi; Aizu, Yoshihisa; Mishina, Hiromichi (July 2004). "Estimation of melanin and hemoglobin in skin tissue using multiple regression analysis aided by Monte Carlo simulation". Journal of Biomedical Optics. 9 (4): 700–710. Bibcode:2004JBO.....9..700N. doi:10.1117/1.1756918. ISSN 1083-3668. PMID 15250756.
- ^ a b Emilio, Maurizio Di Paolo (2018-07-30). "Transdermal Optical Imaging Is the Best Diagnosis Technology Yet". The Engineers' Tribune. Retrieved 2021-02-10.
- ^ Wei, Jing; Luo, Hong; Wu, Si J.; Zheng, Paul P.; Fu, Genyue; Lee, Kang (2018-02-08). "Transdermal Optical Imaging Reveal Basal Stress via Heart Rate Variability Analysis: A Novel Methodology Comparable to Electrocardiography". Frontiers in Psychology. 9: 98. doi:10.3389/fpsyg.2018.00098. ISSN 1664-1078. PMC 5809462. PMID 29472879.
- ^ Luo, Hong; Yang, Deye; Barszczyk, Andrew (2019). "Smartphone-Based Blood Pressure Measurement Using Transdermal Optical Imaging Technology" (PDF). Circulation. Cardiovascular Imaging. 12 (8): e008857. doi:10.1161/CIRCIMAGING.119.008857. PMID 31382766.
- ^ "Blood pressure monitoring may one day be easy as taking a video selfie". American Heart Association. Retrieved 2021-02-10.
- ^ "How Scientists Will Turn Your Smartphone Into a Lie Detector". www.vice.com. 4 July 2016. Retrieved 2021-02-08.