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Journal of Biomedical Optics • Open Access

Distance optical sensor for quantitative endoscopy
Author(s): Agnese Lucesoli; Luigino Criante; Bruno Farabollini; Floriano Bonifazi; Francesco F. Simoni; Tullio Rozzi

Paper Abstract

We present a novel optical sensor able to measure the distance between the tip of an endoscopic probe and the anatomical object under examination. In medical endoscopy, knowledge of the real distance from the endoscope to the anatomical wall provides the actual dimensions and areas of the anatomical objects. Currently, endoscopic examination is limited to a direct and qualitative observation of anatomical cavities. The major obstacle to quantitative imaging is the inability to calibrate the acquired images because of the magnification system. However, the possibility of monitoring the actual size of anatomical objects is a powerful tool both in research and in clinical investigation. To solve this problem in a satisfactory way we study and realize an absolute distance sensor based on fiber optic low-coherence interferometry (FOLCI). Until now the sensor has been tested on pig trachea, simulating the real humidity and temperature (37°C) conditions. It showed high sensitivity, providing correct and repeatable distance measurements on biological samples even in case of very low reflected power (down to 2 to 3 nW), with an error lower than 0.1 mm.

Paper Details

Date Published: 1 January 2008
PDF: 3 pages
J. Biomed. Opt. 13(1) 010504 doi: 10.1117/1.2870138
Published in: Journal of Biomedical Optics Volume 13, Issue 1
Show Author Affiliations
Agnese Lucesoli, Univ. Politecnica delle Marche (Italy)
Luigino Criante, Univ. Politecnica delle Marche (Italy)
Bruno Farabollini, Azienda Ospedaliero-Univ. Ospedali Riuniti Umberto I-G.M.Lancisi-G.Salesi (Italy)
Floriano Bonifazi, Azienda Ospedaliero-Univ. Ospedali Riuniti Umberto I-G.M.Lancisi-G.Salesi (Italy)
Francesco F. Simoni, Univ. Politecnica delle Marche (Italy)
Tullio Rozzi, Univ. Politecnica delle Marche (Italy)

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