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Journal of Biomedical Optics

Properties of contact pressure induced by manually operated fiber-optic probes
Author(s): Maksimilijan Bregar; Blaž Cugmas; Peter Naglic; Daniela Hartmann; Franjo Pernuš; Boštjan Likar; Miran Bürmen
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Paper Abstract

We assess the properties of contact pressure applied by manually operated fiber-optic probes as a function of the operator, probe contact area, and sample stiffness. First, the mechanical properties of human skin sites with different skin structures, thicknesses, and underlying tissues were studied by <italic<in vivo</italic< indentation tests. According to the obtained results, three different homogeneous silicone skin phantoms were created to encompass the observed range of mechanical properties. The silicon phantoms were subsequently used to characterize the properties of the contact pressure by 10 experienced probe operators employing fiber-optic probes with different contact areas. A custom measurement system was used to collect the time-lapse of diffuse reflectance and applied contact pressure. The measurements were characterized by a set of features describing the transient and steady-state properties of the contact pressure and diffuse reflectance in terms of rise time, optical coupling, average value, and variability. The average applied contact pressure and contact pressure variability were found to significantly depend on the probe operator, probe contact area, and surprisingly also on the sample stiffness. Based on the presented results, we propose a set of practical guidelines for operators of manual probes.

Paper Details

Date Published: 18 December 2015
PDF: 9 pages
J. Biomed. Opt. 20(12) 127002 doi: 10.1117/1.JBO.20.12.127002
Published in: Journal of Biomedical Optics Volume 20, Issue 12
Show Author Affiliations
Maksimilijan Bregar, Univ. of Ljubljana (Slovenia)
Blaž Cugmas, Univ. of Ljubljana (Slovenia)
Peter Naglic, Univ. of Ljubljana (Slovenia)
Daniela Hartmann, Ludwig-Maximilians-Univ. München (Germany)
Franjo Pernuš, Univ. of Ljubljana (Slovenia)
Boštjan Likar, Univ. of Ljubljana (Slovenia)
Miran Bürmen, Univ. of Ljubljana (Slovenia)

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