Potential role of collagen in optical behaviour of arterial tissue during laser irradiation

Ramtin Agah; Massoud Motamedi; Praveen Dalmia; Emile Ettedgui; Leon Song; J. Richard Spears

Potential role of collagen in optical behaviour of arterial tissue during laser irradiation

Ramtin Agah, Massoud Motamedi, Praveen Dalmia, Emile Ettedgui, Leon Song, J. Richard Spears

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

The optical properties diffuse reflection and transmission of normal porcine aorta and thermally coagulated aorta were measured using low power laser irradiation at 1060 nm, 633 nm, 514 nm, and 325 nm (reflection measurements only). The results from three of the wavelengths (1060nm, 633nm, and 514 nm) were used with a Delta-Eddington diffusion approximation model^1,2 to calculate absorption coefficients, μa, and effective scattering coefficients, μs, of the normal and thermally coagulated aorta at these wavelengths. The results show a strong wavelength dependency of irreversible changes in optical properties of thermally damaged aorta, with a trend of increasing changes in reflection approaching smaller wavelengths.

Original language	English (US)
Title of host publication	Proceedings of SPIE - The International Society for Optical Engineering
Editors	Steven L. Jacques
Publisher	Publ by Int Soc for Optical Engineering
Pages	246-252
Number of pages	7
ISBN (Print)	0819402435
State	Published - 1990
Externally published	Yes
Event	Proceedings of Laser-Tissue Interaction - Los Angeles, CA, USA Duration: Jan 15 1990 → Jan 17 1990

Publication series

Name	Proceedings of SPIE - The International Society for Optical Engineering
Volume	1202
ISSN (Print)	0277-786X

Other

Other	Proceedings of Laser-Tissue Interaction
City	Los Angeles, CA, USA
Period	1/15/90 → 1/17/90

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Computer Science Applications
Applied Mathematics
Electrical and Electronic Engineering

Cite this

Agah, R., Motamedi, M., Dalmia, P., Ettedgui, E., Song, L., & Spears, J. R. (1990). Potential role of collagen in optical behaviour of arterial tissue during laser irradiation. In S. L. Jacques (Ed.), Proceedings of SPIE - The International Society for Optical Engineering (pp. 246-252). (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 1202). Publ by Int Soc for Optical Engineering.

Potential role of collagen in optical behaviour of arterial tissue during laser irradiation. / Agah, Ramtin; Motamedi, Massoud; Dalmia, Praveen et al.
Proceedings of SPIE - The International Society for Optical Engineering. ed. / Steven L. Jacques. Publ by Int Soc for Optical Engineering, 1990. p. 246-252 (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 1202).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Agah, R, Motamedi, M, Dalmia, P, Ettedgui, E, Song, L & Spears, JR 1990, Potential role of collagen in optical behaviour of arterial tissue during laser irradiation. in SL Jacques (ed.), Proceedings of SPIE - The International Society for Optical Engineering. Proceedings of SPIE - The International Society for Optical Engineering, vol. 1202, Publ by Int Soc for Optical Engineering, pp. 246-252, Proceedings of Laser-Tissue Interaction, Los Angeles, CA, USA, 1/15/90.

Agah R, Motamedi M, Dalmia P, Ettedgui E, Song L, Spears JR. Potential role of collagen in optical behaviour of arterial tissue during laser irradiation. In Jacques SL, editor, Proceedings of SPIE - The International Society for Optical Engineering. Publ by Int Soc for Optical Engineering. 1990. p. 246-252. (Proceedings of SPIE - The International Society for Optical Engineering).

Agah, Ramtin ; Motamedi, Massoud ; Dalmia, Praveen et al. / Potential role of collagen in optical behaviour of arterial tissue during laser irradiation. Proceedings of SPIE - The International Society for Optical Engineering. editor / Steven L. Jacques. Publ by Int Soc for Optical Engineering, 1990. pp. 246-252 (Proceedings of SPIE - The International Society for Optical Engineering).

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abstract = "The optical properties diffuse reflection and transmission of normal porcine aorta and thermally coagulated aorta were measured using low power laser irradiation at 1060 nm, 633 nm, 514 nm, and 325 nm (reflection measurements only). The results from three of the wavelengths (1060nm, 633nm, and 514 nm) were used with a Delta-Eddington diffusion approximation model1,2 to calculate absorption coefficients, μa, and effective scattering coefficients, μs, of the normal and thermally coagulated aorta at these wavelengths. The results show a strong wavelength dependency of irreversible changes in optical properties of thermally damaged aorta, with a trend of increasing changes in reflection approaching smaller wavelengths.",

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AU - Spears, J. Richard

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AB - The optical properties diffuse reflection and transmission of normal porcine aorta and thermally coagulated aorta were measured using low power laser irradiation at 1060 nm, 633 nm, 514 nm, and 325 nm (reflection measurements only). The results from three of the wavelengths (1060nm, 633nm, and 514 nm) were used with a Delta-Eddington diffusion approximation model1,2 to calculate absorption coefficients, μa, and effective scattering coefficients, μs, of the normal and thermally coagulated aorta at these wavelengths. The results show a strong wavelength dependency of irreversible changes in optical properties of thermally damaged aorta, with a trend of increasing changes in reflection approaching smaller wavelengths.

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Potential role of collagen in optical behaviour of arterial tissue during laser irradiation

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