Optical properties of peritoneal biological tissues in the spectral range of 350–2500 nm

Bashkatov, Alexey N.; Genina, Elina A.; Kozintseva, Marina D.; Кочубей, В. И.; Gorodkov, S. Yu.; Tuchin, Valery V.

doi:10.1134/s0030400x16010045

Cited by 42 publications

(37 citation statements)

References 19 publications

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“…There is no absolute formula for calculating this depth as this parameter is not only spectrum specific, but is also dependent on the tissue composition in the region of interest. Empirical studies conducted in-vitro and in-vivo and complex modelling using tissue-specific absorption and scattering coefficients suggested that in the visible spectrum higher wavelength light penetrates deeper into human skin [6] [7] [8] . In this experiment a multi-wavelength light source with light emitters at 530, 590 and 660 nm was selected to illuminate a palm area.…”

Section: Multi-wavelength Ippg Systemmentioning

confidence: 99%

Noncontact blood perfusion mapping in clinical applications

Iakovlev

Dwyer

et al. 2016

SPIE Proceedings

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Non-contact imaging photoplethysmography (iPPG) to detect pulsatile blood microcirculation in tissue has been selected as a successor to low spatial resolution and slow scanning blood perfusion techniques currently employed by clinicians. The proposed iPPG system employs a novel illumination source constructed of multiple high power LEDs with narrow spectral emission, which are temporally modulated and synchronised with a high performance sCMOS sensor. To ensure spectrum stability and prevent thermal wavelength drift due to junction temperature variations, each LED features a custom-designed thermal management system to effectively dissipate generated heat and auto-adjust current flow. The use of a multi-wavelength approach has resulted in simultaneous microvascular perfusion monitoring at various tissue depths, which is an added benefit for specific clinical applications. A synchronous detection algorithm to extract weak photoplethysmographic pulse-waveforms demonstrated robustness and high efficiency when applied to even small regions of 5 mm 2 . The experimental results showed evidences that the proposed system could achieve noticeable accuracy in blood perfusion monitoring by creating complex amplitude and phase maps for the tissue under examination.

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Section: Multi-wavelength Ippg Systemmentioning

confidence: 99%

Noncontact blood perfusion mapping in clinical applications

Iakovlev

Dwyer

et al. 2016

SPIE Proceedings

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“…New "tissue diagnostic/therapeutic windows" in the nearinfrared (NIR) attracted a lot of attention recently. 59,60 In addition to visible (vis)/NIR "windows" such as I (625 to 975 nm), II (1100 to 1350 nm), III (1600 to 1870 nm), and IV (2100 to 2300 nm), 59,60 a narrow UV "window" (350 to 400 nm) can also be used 61 (see Fig. 2).…”

Section: Optical Properties Of Biological Tissuesmentioning

confidence: 99%

“…Recently, the optical properties of bovine muscle, 23 rat parietal peritoneum, 61 human 26 and rat 73 subcutaneous adipose, human skin, 26 bone, 74 stomach 75 and maxillary sinus 26 mucosa, human colon, 76 sclera, 77 and dura mater 78 were measured in the vis/NIR spectral ranges. The tissues were characterized in vitro using integrating sphere spectroscopy technique and inverse adding-doubling 79 or inverse Monte Carlo methods.…”

Section: Optical Properties Of Biological Tissuesmentioning

confidence: 99%

“…The tissues were characterized in vitro using integrating sphere spectroscopy technique and inverse adding-doubling 79 or inverse Monte Carlo methods. 61,76 Figure 3 shows absorption coefficient spectra of the tissues studied. It is well seen that tissue absorption has a minimal value in the spectral range from 600 to 1300 nm (2.5 AE 1.5 cm −1 ), within so-called "second and third transparency windows (TW)," and from 1650 to 1800 nm (3 AE 1.5 cm −1 ) in the "fourth-TW" of tissues.…”

Section: Optical Properties Of Biological Tissuesmentioning

confidence: 99%

“…Retrieved on the query "optical properties of biological tissues" from "Scopus," "Web of Science," and "PubMed" databases. s ) coefficients and light penetration depth (δ) of peritoneum 61 within tissue "optical windows" I (350 to 400 nm), II (625 to 975 nm), III (1100 to 1350 nm), IV (1600 to 1870 nm), and V (2100 to 2300 nm). Fig.…”

Section: Optical Properties Of Biological Tissuesmentioning

confidence: 99%

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Measurement of tissue optical properties in the context of tissue optical clearing

et al. 2018

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Nowadays, dynamically developing optical (photonic) technologies play an ever-increasing role in medicine. Their adequate and effective implementation in diagnostics, surgery, and therapy needs reliable data on optical properties of human tissues, including skin. This paper presents an overview of recent results on the measurements and control of tissue optical properties. The issues reported comprise a brief review of optical properties of biological tissues and efficacy of optical clearing (OC) method in application to monitoring of diabetic complications and visualization of blood vessels and microcirculation using a number of optical imaging technologies, including spectroscopic, optical coherence tomography, and polarization- and speckle-based ones. Molecular modeling of immersion OC of skin and specific technique of OC of adipose tissue by its heating and photodynamic treatment are also discussed.

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Monitoring of optical properties of tumors during laser plasmon photothermal therapy

Genin,

Bucharskaya,

Kirillin

et al. 2024

Journal of Biophotonics

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We studied grafted tumors obtained by subcutaneous implantation of kidney cancer cells into male white rats. Gold nanorods with a plasmon resonance of about 800 nm were injected intratumorally for photothermal heating. Experimental irradiation of tumors was carried out percutaneously using a near‐infrared diode laser. Changes in the optical properties of the studied tissues in the spectral range 350–2200 nm under plasmonic photothermal therapy (PPT) were studied. Analysis of the observed changes in the absorption bands of water and hemoglobin made it possible to estimate the depth of thermal damage to the tumor. A significant decrease in absorption peaks was observed in the spectrum of the upper peripheral part and especially the tumor capsule. The obtained changes in the optical properties of tissues under laser irradiation can be used to optimize laboratory and clinical PPT procedures.

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Optical properties of peritoneal biological tissues in the spectral range of 350–2500 nm

Cited by 42 publications

References 19 publications

Noncontact blood perfusion mapping in clinical applications

Noncontact blood perfusion mapping in clinical applications

Measurement of tissue optical properties in the context of tissue optical clearing

Monitoring of optical properties of tumors during laser plasmon photothermal therapy

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