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Diffuse reflectance spectroscopy as a tool to measure the absorption coefficient in skin: system calibration.

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Title: Diffuse reflectance spectroscopy as a tool to measure the absorption coefficient in skin: system calibration.
Authors: Karsten, A. akarsten@csir.co.za, Singh, A.1, Karsten, P.2, Braun, M.3
Source: Lasers in Medical Science. Feb2013, Vol. 28 Issue 2, p437-444. 8p.
Subjects: Skin, Mass attenuation coefficients, Reflectance spectroscopy, Phototypesetting, Wavelengths, Melanins, Laser surgery
Abstract: An individualised laser skin treatment may enhance the treatment and reduces risks and side-effects. The optical properties (absorption and scattering coefficients) are important parameters in the propagation of laser light in skin tissue. The differences in the melanin content of different skin phototypes influence the absorption of the light. The absorption coefficient at the treatment wavelength for an individual can be determined by diffuse reflectance spectroscopy, using a probe containing seven fibres. Six of the fibres deliver the light to the measurement site and the central fibre collects the diffused reflected light. This is an in vivo technique, offering benefits for near-real-time results. Such a probe, with an effective wavelength band from 450 to 800 nm, was used to calibrate skin-simulating phantoms consisting of intralipid and ink. The calibration constants were used to calculate the absorption coefficients from the diffuse reflectance measurements of three volunteers (skin phototypes, II, IV and V) for sun-exposed and non-exposed areas on the arm. [ABSTRACT FROM AUTHOR]
Copyright of Lasers in Medical Science is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: <searchLink fieldCode="AR" term="%22Karsten%2C+A%2E%22">Karsten, A.</searchLink><i> akarsten@csir.co.za</i><br /><searchLink fieldCode="AR" term="%22Singh%2C+A%2E%22">Singh, A.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Karsten%2C+P%2E%22">Karsten, P.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Braun%2C+M%2E%22">Braun, M.</searchLink><relatesTo>3</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Lasers+in+Medical+Science%22">Lasers in Medical Science</searchLink>. Feb2013, Vol. 28 Issue 2, p437-444. 8p.
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  Data: <searchLink fieldCode="DE" term="%22Skin%22">Skin</searchLink><br /><searchLink fieldCode="DE" term="%22Mass+attenuation+coefficients%22">Mass attenuation coefficients</searchLink><br /><searchLink fieldCode="DE" term="%22Reflectance+spectroscopy%22">Reflectance spectroscopy</searchLink><br /><searchLink fieldCode="DE" term="%22Phototypesetting%22">Phototypesetting</searchLink><br /><searchLink fieldCode="DE" term="%22Wavelengths%22">Wavelengths</searchLink><br /><searchLink fieldCode="DE" term="%22Melanins%22">Melanins</searchLink><br /><searchLink fieldCode="DE" term="%22Laser+surgery%22">Laser surgery</searchLink>
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  Data: An individualised laser skin treatment may enhance the treatment and reduces risks and side-effects. The optical properties (absorption and scattering coefficients) are important parameters in the propagation of laser light in skin tissue. The differences in the melanin content of different skin phototypes influence the absorption of the light. The absorption coefficient at the treatment wavelength for an individual can be determined by diffuse reflectance spectroscopy, using a probe containing seven fibres. Six of the fibres deliver the light to the measurement site and the central fibre collects the diffused reflected light. This is an in vivo technique, offering benefits for near-real-time results. Such a probe, with an effective wavelength band from 450 to 800 nm, was used to calibrate skin-simulating phantoms consisting of intralipid and ink. The calibration constants were used to calculate the absorption coefficients from the diffuse reflectance measurements of three volunteers (skin phototypes, II, IV and V) for sun-exposed and non-exposed areas on the arm. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
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  Data: <i>Copyright of Lasers in Medical Science is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1007/s10103-012-1079-2
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      – Code: eng
        Text: English
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        PageCount: 8
        StartPage: 437
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      – SubjectFull: Skin
        Type: general
      – SubjectFull: Mass attenuation coefficients
        Type: general
      – SubjectFull: Reflectance spectroscopy
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      – SubjectFull: Phototypesetting
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      – SubjectFull: Wavelengths
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      – SubjectFull: Melanins
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      – SubjectFull: Laser surgery
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              Text: Feb2013
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