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Proceedings Paper

Surface mechanics of biological tissues using low-frequency rayleigh waves detected by laser speckle
Author(s): Sean J. Kirkpatrick; Donald Dean Duncan; Deborah A. Baker; Jon Adams
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Paper 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.

Paper Details

Date Published: 16 July 2002
PDF: 7 pages
Proc. SPIE 4707, Saratov Fall Meeting 2001: Optical Technologies in Biophysics and Medicine III, (16 July 2002); doi: 10.1117/12.475580
Show Author Affiliations
Sean J. Kirkpatrick, Oregon Medical Laser Ctr. and Oregon Health and Science Univ. (United States)
Donald Dean Duncan, Johns Hopkins Univ. (United States)
Deborah A. Baker, Oregon Medical Laser Ctr. and Oregon Health and Science Univ. (United States)
Jon Adams, Oregon Health and Science Univ. (United States)


Published in SPIE Proceedings Vol. 4707:
Saratov Fall Meeting 2001: Optical Technologies in Biophysics and Medicine III

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