THz Sensing of Human Skin: A Review of Skin Modeling Approaches
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...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-05-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/21/11/3624 |
| _version_ | 1827691798977314816 |
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| author | Jiarui Wang Hannah Lindley-Hatcher Xuequan Chen Emma Pickwell-MacPherson |
| author_facet | Jiarui Wang Hannah Lindley-Hatcher Xuequan Chen Emma Pickwell-MacPherson |
| author_sort | Jiarui Wang |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-03-10T11:08:41Z |
| format | Article |
| id | doaj.art-c564ed85575e4e4dbdb6248757e089f9 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-10T11:08:41Z |
| publishDate | 2021-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-c564ed85575e4e4dbdb6248757e089f92023-11-21T20:58:48ZengMDPI AGSensors1424-82202021-05-012111362410.3390/s21113624THz Sensing of Human Skin: A Review of Skin Modeling ApproachesJiarui Wang0Hannah Lindley-Hatcher1Xuequan Chen2Emma Pickwell-MacPherson3Department of Electronic Engineering, The Chinese University of Hong Kong, Shatin, Hong Kong 999077, ChinaDepartment of Physics, University of Warwick, Coventry CV4 7AL, UKDepartment of Electronic Engineering, The Chinese University of Hong Kong, Shatin, Hong Kong 999077, ChinaDepartment of Electronic Engineering, The Chinese University of Hong Kong, Shatin, Hong Kong 999077, ChinaThe 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.https://www.mdpi.com/1424-8220/21/11/3624Terahertz spectroscopyin vivoskinskin modeling |
| spellingShingle | Jiarui Wang Hannah Lindley-Hatcher Xuequan Chen Emma Pickwell-MacPherson THz Sensing of Human Skin: A Review of Skin Modeling Approaches Sensors Terahertz spectroscopy in vivo skin skin modeling |
| title | THz Sensing of Human Skin: A Review of Skin Modeling Approaches |
| title_full | THz Sensing of Human Skin: A Review of Skin Modeling Approaches |
| title_fullStr | THz Sensing of Human Skin: A Review of Skin Modeling Approaches |
| title_full_unstemmed | THz Sensing of Human Skin: A Review of Skin Modeling Approaches |
| title_short | THz Sensing of Human Skin: A Review of Skin Modeling Approaches |
| title_sort | thz sensing of human skin a review of skin modeling approaches |
| topic | Terahertz spectroscopy in vivo skin skin modeling |
| url | https://www.mdpi.com/1424-8220/21/11/3624 |
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