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Biomedical Engineering / Biomedizinische Technik

Joint Journal of the German Society for Biomedical Engineering in VDE and the Austrian and Swiss Societies for Biomedical Engineering and the German Society of Biomaterials

Editor-in-Chief: Dössel, Olaf

Editorial Board: Augat, Peter / Habibović, Pamela / Haueisen, Jens / Jahnen-Dechent, Wilhelm / Jockenhoevel, Stefan / Knaup-Gregori, Petra / Lenarz, Thomas / Leonhardt, Steffen / Plank, Gernot / Radermacher, Klaus M. / Schkommodau, Erik / Stieglitz, Thomas / Boenick, Ulrich / Jaramaz, Branislav / Kraft, Marc / Lenthe, Harry / Lo, Benny / Mainardi, Luca / Micera, Silvestro / Penzel, Thomas / Robitzki, Andrea A. / Schaeffter, Tobias / Snedeker, Jess G. / Sörnmo, Leif / Sugano, Nobuhiko / Werner, Jürgen /


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1862-278X
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Volume 63, Issue 5

Issues

Volume 57 (2012)

Algorithms for mapping kidney tissue oxygenation during normothermic machine perfusion using hyperspectral imaging

Wenke Markgraf
  • Corresponding author
  • Institute of Biomedical Engineering, Technische Universität Dresden, 01307 Dresden, Germany, Phone: +49 351 463-33392, Fax: +49 351 463-36026
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/ Philipp Feistel / Christine Thiele / Hagen Malberg
Published Online: 2018-09-15 | DOI: https://doi.org/10.1515/bmt-2017-0216

Abstract

The lack of donor grafts is a severe problem in transplantation medicine. Hence, the improved preservation of existing and the usage of organs that were deemed untransplantable is as urgent as ever. The development of novel preservation techniques has come into focus. A promising alternative to traditional cold storage is normothermic machine perfusion (NMP), which provides the benefit of improving the organs’ viability and of assessing the organs’ status under physiological conditions. For this purpose, methods for evaluating organ parameters have yet to be developed. In a previous study, we determined the tissue oxygen saturation (StO2) of kidneys during NMP with hyperspectral imaging (HSI) based on a discrete wavelength (DW) algorithm. The aim of the current study was to identify a more accurate algorithm for StO2 calculation. A literature search revealed three candidates to test: a DW algorithm and two full spectral algorithms – area under a curve and partial least square regression (PLSR). After obtaining suitable calibration data to train each algorithm, they were evaluated during NMP. The wavelength range from 590 to 800 nm was found to be appropriate for analyzing StO2 of kidneys during NMP. The PLSR method shows good results in analyzing the tissues’ oxygen status in perfusion experiments.

Keywords: discrete wavelength method; hyperspectral imaging; oxygen saturation; partial least square regression; tissue parameters

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About the article

Received: 2017-11-28

Accepted: 2018-09-04

Published Online: 2018-09-15

Published in Print: 2018-10-25


Author Statement

Research funding: Authors state no funding involved.

Conflicts of interest: The authors declare no conflicts of interest.

Informed consent: Informed consent is not applicable.

Ethical approval: The research related to the animal use complies with all the relevant national regulations and institutional policies.


Citation Information: Biomedical Engineering / Biomedizinische Technik, Volume 63, Issue 5, Pages 557–566, ISSN (Online) 1862-278X, ISSN (Print) 0013-5585, DOI: https://doi.org/10.1515/bmt-2017-0216.

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