Non-invasive evaluation of therapeutic response in keloid scar using diffuse reflectance spectroscopy
Open accessAbstract
The pathogenesis and ideal treatment of keloid are still largely unknown, and it is essential to develop an objective assessment of keloid severity to evaluate the therapeutic response. We previously reported that our diffuse reflectance spectroscopy (DRS) system could assist clinicians in understanding the functional and structural condition of keloid scars. The purpose of this study was to understand clinical applicability of our DRS system on evaluating the scar severity and therapeutic response of keloid. We analyzed 228 spectral data from 71 subjects with keloid scars. The scars were classified into mild (0-3), moderate (4-7) and severe (8-11) according to the Vancouver scar scale. We found that as the severity of the scar increased, collagen concentration and water content increased, and the reduced scattering coefficient at 800 nm and oxygen saturation (SaO2) decreased. Using the DRS system, we found that collagen bundles aligned in a specific direction in keloid scars, but not in normal scars. Water content and SaO2 may be utilized as reliable parameters for evaluating the therapeutic response of keloid. In conclusion, the results obtained here suggest that the DRS has potential as an objective technique with which to evaluate keloid scar severity. In addition, it may be useful as a tool with which to track longitudinal response of scars in response to various therapeutic interventions.
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The maximum sample number for FST V-VI is 6.
“the maximum sample number for FST V–VI is 6.41,42,44,46,48”
From Effect of skin color on optical properties and the implications for medical optical technologies: a review (2024) · cites this paper as [46]
At 800 nm, the absorption coefficients described by Tseng et al. were 5-fold greater than those measured by Hsu et al.
“At 800 nm the absorption coefficients described by Tseng et al., were 5-fold greater than those measured by Hsu et al. [55,56].”
From Relevance and utility of the in-vivo and ex-vivo optical properties of the skin reported in the literature: a review [Invited] (2023) · cites this paper as [56]
Tseng and Hsu's scattering and absorption profiles followed a similar pattern to other authors, with absorption greatest between 500 nm and 600 nm, declining with increasing wavelength except for a small peak at ∼970 nm.
“However, their scattering and absorption profiles followed a similar pattern to the other authors’ with absorption being greatest between 500 nm and 600 nm beyond which it declines steadily with increasing wavelength except for a small peak observed at ∼970 nm.”
From Relevance and utility of the in-vivo and ex-vivo optical properties of the skin reported in the literature: a review [Invited] (2023) · cites this paper as [56]
Concentrations of tissue chromophores including melanin, haemoglobin, water and lipid can be determined using DRS measurements.
“The concentrations of tissue chromophores including melanin, haemoglobin water and lipid can also be determined using DRS measurements [56].”
From Relevance and utility of the in-vivo and ex-vivo optical properties of the skin reported in the literature: a review [Invited] (2023) · cites this paper as [56]
A significant peak was observed at 640 nm for the in-vivo data published by Hsu et al.
“However, a significant peak was observed at 640 nm for the in-vivo data published by Hsu et al., potentially representing scattering due to collagen bundles in the skin [56].”
From Relevance and utility of the in-vivo and ex-vivo optical properties of the skin reported in the literature: a review [Invited] (2023) · cites this paper as [56]
The 640 nm peak in Hsu et al. data potentially represents scattering due to collagen bundles in the skin.
“potentially representing scattering due to collagen bundles in the skin [56].”
From Relevance and utility of the in-vivo and ex-vivo optical properties of the skin reported in the literature: a review [Invited] (2023) · cites this paper as [56]
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References 43 · Cited by 45
- Authors
- Hsu, C.-K., Tzeng, S.-Y., Yang, C.-C., Lee, J. Y.-Y., Huang, L. L.-H., Chen, W.-R., Hughes, M., Chen, Y.-W., Liao, Y.-K., & Tseng, S.-H.
- Affiliations
- National Cheng Kung University Hospital (TW)
- National Cheng Kung University (TW)
- ORCID
- Venue
- Biomedical Optics Express
- Publisher
- Optica Publishing Group
- Published
- 2015-01-08
- Volume
- 6
- Issue
- 2
- Pages
- 390
- ISSN
- 2156-7085 (ISSN-L)
- PMC
- PMC4354586
- OpenAlex
- W2013269241
- Cited by
- 45
- References
- 43
- Citations by year
- 2026: 1 · 2025: 1 · 2024: 5 · 2023: 10 · 2022: 5 · 2021: 1 · 2020: 2 · 2019: 4 · 2018: 4 · 2017: 5 · 2016: 7
- FWCI
- 5.95
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Locations
- Biomedical Optics Express (publishedVersion)
- Europe PMC (PubMed Central) (publishedVersion)
- PubMed Central (publishedVersion)
- PubMed (publishedVersion)
- Funders
- National Science Council Taiwan (NSC) (NSC-102-2221-E-006-248-MY2, NSC-102-2321-B-006-026)
- Topics
- Health Sciences › Medicine › Dermatology › Dermatologic Treatments and Research
- Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Optical Imaging and Spectroscopy Techniques
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Biophysics › Spectroscopy Techniques in Biomedical and Chemical Research
- Keywords
- keloids, diffuse reflectance spectroscopy, treatment response assessment, collagen fiber alignment, moisture content, oxygen saturation, reduced scattering coefficient, Vancouver Scar Scale, non-invasive optical imaging
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