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THz sensing of human skin : a review of skin modeling approaches

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Wang, Jiarui, Lindley-Hatcher, Hannah, Chen, Xuequan and Pickwell-MacPherson, Emma (2021) THz sensing of human skin : a review of skin modeling approaches. Sensors, 21 (11). 3624. doi:10.3390/s21113624 ISSN 1424-8220.

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Official URL: http://dx.doi.org/10.3390/s21113624

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Abstract

The non-ionizing and non-invasive nature of THz radiation, combined with its high sensitivity to water, has made THz imaging and spectroscopy highly attractive for in vivo biomedical applications for many years. Among them, the skin is primarily investigated due to the short penetration depth of THz waves caused by the high attenuation by water in biological samples. However, a complete model of skin describing the THz–skin interaction is still needed. This is also fundamental to reveal the optical properties of the skin from the measured THz spectrum. It is crucial that the correct model is used, not just to ensure compatibility between different works, but more importantly to ensure the reliability of the data and conclusions. Therefore, in this review, we summarize the models applied to skin used in the THz regime, and we compare their adaptability, accuracy, and limitations. We show that most of the models attempt to extract the hydration profile inside the skin while there is also the anisotropic model that displays skin structural changes in the stratum corneum.

Item Type: Journal Article
Subjects: Q Science > QC Physics
Q Science > QM Human anatomy
Divisions: Faculty of Science, Engineering and Medicine > Science > Physics
Library of Congress Subject Headings (LCSH): Terahertz spectroscopy , Skin -- Spectroscopic imaging
Journal or Publication Title: Sensors
Publisher: MDPI AG
ISSN: 1424-8220
Official Date: 23 May 2021
Dates:
DateEvent
23 May 2021Published
19 May 2021Accepted
Volume: 21
Number: 11
Article Number: 3624
DOI: 10.3390/s21113624
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Open Access (Creative Commons)
Date of first compliant deposit: 26 May 2021
Date of first compliant Open Access: 27 May 2021
RIOXX Funder/Project Grant:
Project/Grant IDRIOXX Funder NameFunder ID
14206717Research Grants Council, University Grants Committeehttp://dx.doi.org/10.13039/501100002920
14201415Research Grants Council, University Grants Committeehttp://dx.doi.org/10.13039/501100002920
ITS/371/16Innovation and Technology Commission - Hong KongUNSPECIFIED
EP/S021442/1[EPSRC] Engineering and Physical Sciences Research Councilhttp://dx.doi.org/10.13039/501100000266
Wolfson Merit Award Royal Societyhttp://dx.doi.org/10.13039/501100000288
Is Part Of: 1

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