In Vivo characterization of skin using a weiner nonlinear stochastic identification method
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Chen-2009-In Vivo characteriza.pdf
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719.63 KB
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Checksum (MD5)
6e1b3a3ac9132c8799a2b74c434bb060
Author(s)
Chen, Yi
Hunter, Ian
Date Issued
November 2009
Journal
2009 Engineering in Medicine and Biology Society
Publisher
Institute of Electrical and Electronics Engineers
Citation
Yi Chen, and I.W. Hunter. “In Vivo characterization of skin using a weiner nonlinear stochastic system identification method.” Engineering in Medicine and Biology Society, 2009. EMBC 2009. Annual International Conference of the IEEE. 2009. 6010-6013. © 2009 IEEE
Version
Final published version
Abstract
This paper describes an indentometer device used to identify the linear dynamic and nonlinear properties of skin and underlying tissue using an in vivo test. The device uses a Lorentz force actuator to apply a dynamic force to the skin and measures the resulting displacement. It was found that the skin could be modeled as a Wiener system (i.e. a linear dynamic system followed by a static nonlinearity). Using a stochastic nonlinear system identification technique, the method presented in this paper was able to identify the dynamic linear and static nonlinear mechanical parameters of the indentometer-skin system within 2 to 4 seconds. The shape of the nonlinearity was found to vary depending on the area of the skin that was tested. We show that the device can repeatably distinguish between different areas of human tissue for multiple test subjects.
MIT Department
Massachusetts Institute of Technology. BioInstrumentation Laboratory
Koch Institute for Integrative Cancer Research at MIT
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
http://dx.doi.org/10.1109/IEMBS.2009.5334028
