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Proceedings Paper

Optical quality assessment of rigid endoscopes during clinical lifetime
Author(s): Herke Jan Noordmans; Ijen van Mil; Said Daoudi; Sander Kruit; Henk van den Brink; Rudolf Verdaasdonk
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Paper Abstract

An endoscope test bench is presented to test the optical quality of endoscopes on a regular basis to assure optimal image quality during surgery. A power LED and a photo diode are used to measure the transmission of the illumination fibers. Captures of target images displayed on a LCD screen as seen through the endoscope with a high resolution camera are analyzed to determine the contrast for different spatial line pairs. Transmission and contrast plots are compared to reference data to determine whether an endoscope is still acceptable for clinical application. Results show that endoscopes degrade gradually but steadily over time. In time a large database of various types of endoscope will be built to fine-tune the criteria for approval or rejection of the endoscopes.

Paper Details

Date Published: 23 February 2006
PDF: 7 pages
Proc. SPIE 6082, Endoscopic Microscopy, 60820H (23 February 2006); doi: 10.1117/12.648497
Show Author Affiliations
Herke Jan Noordmans, Univ. Medical Ctr. Utrecht (Netherlands)
Ijen van Mil, Univ. Medical Ctr. Utrecht (Netherlands)
Said Daoudi, Univ. Medical Ctr. Utrecht (Netherlands)
Sander Kruit, Univ. Medical Ctr. Utrecht (Netherlands)
Henk van den Brink, Univ. Medical Ctr. Utrecht (Netherlands)
Rudolf Verdaasdonk, Univ. Medical Ctr. Utrecht (Netherlands)

Published in SPIE Proceedings Vol. 6082:
Endoscopic Microscopy
Guillermo J. Tearney M.D.; Thomas D. Wang, Editor(s)

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