Surface mechanics of biological tissues using low-frequency rayleigh waves detected by laser speckle

Sean J. Kirkpatrick; Donald Dean Duncan; Deborah A. Baker; Jon Adams

doi:10.1117/12.475580

16 July 2002 Surface mechanics of biological tissues using low-frequency rayleigh waves detected by laser speckle

Sean J. Kirkpatrick, Donald Dean Duncan, Deborah A. Baker, Jon Adams

Proceedings Volume 4707, Saratov Fall Meeting 2001: Optical Technologies in Biophysics and Medicine III; (2002) https://doi.org/10.1117/12.475580
Event: Saratov Fall Meeting 2001, 2001, Saratov, Russian Federation

Abstract

An acousto-optical method for the determination of the mechanical loss factor in biological tissues is presented. Measurements of the loss factor were made on a polyvinyl chloride (PVC) phantom, elastin derived from a bovine nuchal ligament, and porcine skin. The acousto-optical values of the loss factor were compared with those measured with a more conventional mechanical testing system. The values for the mechanical loss factor for PVC and nuchal elastin as calculated from the acousto-optical method agreed with those determined using the mechanical testing system. However, there was a significant difference between the two methods for the porcine skin. We hypothesize that the acousto- optical method measures only the stratum corneum of the skin while the mechanical method evaluates the bulk properties of the skin. The rigid, keratinous fibers of the stratum corneum are believed to be responsible for the lower loss factor measured with the acousto-optical method.

Citation Download Citation

Sean J. Kirkpatrick, Donald Dean Duncan, Deborah A. Baker, and Jon Adams "Surface mechanics of biological tissues using low-frequency rayleigh waves detected by laser speckle", Proc. SPIE 4707, Saratov Fall Meeting 2001: Optical Technologies in Biophysics and Medicine III, (16 July 2002); https://doi.org/10.1117/12.475580

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