NDLI: Skin characteristics by laser generated surface waves

Content Provider	IEEE Xplore Digital Library
Author	Zhihong Huang L'Etang, A.
Copyright Year	2009
Description	Author affiliation: School of Engineering, Physics and Mathematics, University of Dundee, Dundee, DD1 4HN, UK (Zhihong Huang; L'Etang, A.)
Abstract	This paper discusses a study into the suitability of using laser generated surface acoustic waves for the characterisation of skin properties without causing any damage to the skin thermally or by mechanical disruption. Using commercial Finite Element Code ANSYS, the effects of laser wavelength, laser beam radius and laser rise time on generation of laser generated ultrasonic waves in a 3-layered elastic isotropic model of human skin were studied. The FE model is an example of a sequential coupled field analysis where the thermal and mechanical analyses are treated separately. The heating of the skin model due to the short laser pulse is simulated by a dynamic thermal analysis with the laser pulse modeled as volumetric heat generation and the results from this analysis subsequently applied as a load in the mechanical analysis where the out-of-plane displacement histories are analyzed. The technique described in this paper also involves measuring the propagation velocity of SAWs, which are directly related to the material properties, and thickness of layers, this is done over a wide frequency range in order to obtain maximum information regarding the material under test.
Starting Page	4136
Ending Page	4139
File Size	410582
Page Count	4
File Format	PDF
ISBN	9781424432967
ISSN	1557170X
DOI	10.1109/IEMBS.2009.5332725
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-09-03
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Skin Character generation Surface waves Surface emitting lasers Laser modes Optical pulse generation Surface acoustic waves Coupled mode analysis Acoustic waves Mechanical factors
Content Type	Text
Resource Type	Article
Subject	Computer Vision and Pattern Recognition Health Informatics Signal Processing Biomedical Engineering

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