2013
DOI: 10.1117/1.jbo.18.4.047002
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Pressure-induced near infrared spectra response as a valuable source of information for soft tissue classification

Abstract: Abstract. Acquiring near infrared spectra in vivo usually requires a fiber-optic probe to be pressed against the tissue. The applied pressure can significantly affect the optical properties of the underlying tissue, and thereby the acquired spectra. The existing studies consider these effects to be distortions. In contrast, we hypothesize that the pressureinduced spectral response is site-and tissue-specific, providing additional information for the tissue classification. For the purpose of this study, a custo… Show more

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Cited by 19 publications
(26 citation statements)
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“…16,21 The full contact pressure range was employed only by one study. 25 The effects of the applied contact pressure on the tissue optical properties in terms of transmittance, reflectance, absorption, and scattering coefficients were found to be governed by the local concentrations of water, hemoglobin, and lipids. 25 The observed increase in the tissue transmittance with the applied pressure 15,24 was explained by the reduction in the specimen thickness.…”
Section: Introductionmentioning
confidence: 99%
See 3 more Smart Citations
“…16,21 The full contact pressure range was employed only by one study. 25 The effects of the applied contact pressure on the tissue optical properties in terms of transmittance, reflectance, absorption, and scattering coefficients were found to be governed by the local concentrations of water, hemoglobin, and lipids. 25 The observed increase in the tissue transmittance with the applied pressure 15,24 was explained by the reduction in the specimen thickness.…”
Section: Introductionmentioning
confidence: 99%
“…The resulting changes can substantially degrade the performance of the subsequent quantitative or qualitative spectral analysis. There are several studies on the contact pressure-induced spectral changes in the visible and near-infrared DRS, [15][16][17][18][19][20][21][22][23][24][25] as well as similar studies involving other spectroscopic and imaging techniques. [26][27][28][29] Initial studies were focused on ex vivo measurements and utilized a so-called spring-loaded compression apparatus [ Fig.…”
Section: Introductionmentioning
confidence: 99%
See 2 more Smart Citations
“…Compared to the experimental setup we used in our previous study [7], in this setup the fiber probe end touched the surface of skin during the measurement. It is known that the compression of skin changes its optical properties [14][15][16][17][18]. As we were not able to include a pressure sensor in our experimental setup to determine the applied pressure for each measurement, the operator doing the measurements trained to apply approximately the same pressure for each measurement by just lightly touching the skin surface.…”
Section: Methodsmentioning
confidence: 99%