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Proceedings Paper

In vivo optical coherence tomography of percutaneous implants in hairless mice
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Paper Abstract

Biocompatibility studies of percutanous implants in animal models usually involve numerous lethal biopsies for subsequent morphometric analysis of the implant-tissue interface. A common drawback of the study protocol is the restriction of the analysis to one final time point. In this study optical coherence tomography (OCT) was used to visualize and enable quantification of the local skin anatomy in the vicinity of a percutaneous implant in an animal model using hairless mice. Non invasive in vivo optical biopsies were taken on predetermined time points after implantation and ex vivo in situ at the day of noticeable inflammation. The custom made Fourier-domain OCT system was programmed for imaging with different scanning schemes. A spoke-pattern of 72 cross-sectional scans which was centred at the midpoint of the circular shaped implants was acquired and worked best for the in-vivo situation. Motion-artefact-free three-dimensional tomograms were obtained from the implant site before excision and preparation for histology. Morphometric parameters such as epithelial downgrowth, distance to normal growth and tissue thickness were extracted from the images with a simple segmentation algorithm. Qualitatively, the OCT B-Scans are in good agreement with histological sections. Therefore, OCT can provide additional valuable information about the implant-tissue interface at freely selectable time points before the lethal biopsy. Locally confined quantitative assessments of tissue-implant interaction for in vivo postoperative monitoring can be carried out.

Paper Details

Date Published: 19 February 2010
PDF: 6 pages
Proc. SPIE 7554, Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XIV, 75540S (19 February 2010); doi: 10.1117/12.841640
Show Author Affiliations
S. Donner, Laser Zentrum Hannover e.V. (Germany)
Hannover Medical School (Germany)
F. Witte, Hannover Medical School (Germany)
Univ. of Pittsburgh (United States)
I. Bartsch, Hannover Medical School (Germany)
F. Petraglia, Univ. of Pittsburgh (United States)
O. Massow, Laser Zentrum Hannover e.V. (Germany)
M. Heidrich, Laser Zentrum Hannover e.V. (Germany)
H. Lubatschowski, Laser Zentrum Hannover e.V. (Germany)
A. Heisterkamp, Laser Zentrum Hannover e.V. (Germany)
Hannover Medical School (Germany)
A. Krüger, Laser Zentrum Hannover e.V. (Germany)
Hannover Medical School (Germany)

Published in SPIE Proceedings Vol. 7554:
Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XIV
Joseph A. Izatt; James G. Fujimoto; Valery V. Tuchin, Editor(s)

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