Study on the influence of contact pressure on diffuse spectroscopy measurement of in vivo tissue

Li, Chenxi; Xia, Hua; Zhou, Yifeng; Li, Si; Liu, Rong; Chen, Wenliang; Jiang, Jialiang

doi:10.1016/j.infrared.2021.103669

Cited by 3 publications

(3 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The effect of pressure when taking optical measurements of the earlobe using DRS was assessed by Li et al. [ 71 ]. They showed that increasing pressure increased diffuse transmittance and the calculated reduced scattering coefficients particularly at longer wavelengths.…”

Section: Factors Affecting Absorption and Scattering And Reasons For ...mentioning

confidence: 99%

“…As well as reducing sample thickness, increasing pressure is likely to displace free water in the skin and affect the measurement of haemoglobin, both of which will have consequences on the resulting optical coefficients measured [ 70 , 72 ]. Optimal contact pressure for DRS measurements was determined to be between 10 kPa – 25 kPa [ 71 ].…”

Section: Factors Affecting Absorption and Scattering And Reasons For ...mentioning

confidence: 99%

See 1 more Smart Citation

Relevance and utility of the in-vivo and ex-vivo optical properties of the skin reported in the literature: a review [Invited]

Setchfield¹,

Gorman

Simpson

et al. 2023

Biomed. Opt. Express

View full text Add to dashboard Cite

Imaging non-invasively into the human body is currently limited by cost (MRI and CT scan), image resolution (ultrasound), exposure to ionising radiation (CT scan and X-ray), and the requirement for exogenous contrast agents (CT scan and PET scan). Optical imaging has the potential to overcome all these issues but is currently limited by imaging depth due to the scattering and absorption properties of human tissue. Skin is the first barrier encountered by light when imaging non-invasively, and therefore a clear understanding of the way that light interacts with skin is required for progress on optical medical imaging to be made. Here we present a thorough review of the optical properties of human skin measured in-vivo and compare these to the previously collated ex-vivo measurements. Both in-vivo and ex-vivo published data show high inter- and intra-publication variability making definitive answers regarding optical properties at given wavelengths challenging. Overall, variability is highest for ex-vivo absorption measurements with differences of up to 77-fold compared with 9.6-fold for the in-vivo absorption case. The impact of this variation on optical penetration depth and transport mean free path is presented and potential causes of these inconsistencies are discussed. We propose a set of experimental controls and reporting requirements for future measurements. We conclude that a robust in-vivo dataset, measured across a broad spectrum of wavelengths, is required for the development of future technologies that significantly increase the depth of optical imaging.

show abstract

Section: Factors Affecting Absorption and Scattering And Reasons For ...mentioning

confidence: 99%

Section: Factors Affecting Absorption and Scattering And Reasons For ...mentioning

confidence: 99%

Relevance and utility of the in-vivo and ex-vivo optical properties of the skin reported in the literature: a review [Invited]

Setchfield¹,

Gorman

Simpson

et al. 2023

Biomed. Opt. Express

View full text Add to dashboard Cite

show abstract

“…Guzelsu, N., et al found that the reflectance of polarized light exhibits a linear dependence on skin surface stretch [ 25 ]. Some studies noticed the possible impact of skin thickness on reflectance spectra [ 23 , 26 – 29 ]. Meanwhile, the skin thickness is determined by the skin surface deformation [ 30 , 31 ].…”

Section: Introductionmentioning

confidence: 99%

Dynamic model for the strain-modulated spectral reflectance of the human skin in vivo

Huo,

Wang,

Wei

et al. 2024

Biomed. Opt. Express

View full text Add to dashboard Cite

Hyperspectral imaging (HSI) offers a wealth of information regarding human skin. In this study, we established a dynamic skin spectral reflectance model (DSSR) relating the reflectance to skin surface strain, considering multi physiological and physical parameters of the skin. Experimentally, by HSI, we measured the reflectance variance of the forearm skin in vivo caused by the surface strain, and assessed these key parameters. For the human skin in vivo, within the strain range covered in this paper, stretching increases spectral reflectance, while compression decreases it. Our proposed model provides a possibility for non-contact strain measurement and health monitoring on the skin in vivo based on HSI.

show abstract

The coupling effect between skin strain and blood condition on its reflectance spectrum in-vivo

Huo,

Wang,

Tan

et al. 2024

Optics & Laser Technology

View full text Add to dashboard Cite

Study on the influence of contact pressure on diffuse spectroscopy measurement of in vivo tissue

Cited by 3 publications

References 17 publications

Relevance and utility of the in-vivo and ex-vivo optical properties of the skin reported in the literature: a review [Invited]

Relevance and utility of the in-vivo and ex-vivo optical properties of the skin reported in the literature: a review [Invited]

Dynamic model for the strain-modulated spectral reflectance of the human skin in vivo

The coupling effect between skin strain and blood condition on its reflectance spectrum in-vivo

Contact Info

Product

Resources

About