Distance optical sensor for quantitative endoscopy

Agnese Lucesoli; Luigino Criante; Bruno Farabollini; Floriano Bonifazi; Francesco F. Simoni; Tullio Rozzi

doi:10.1117/1.2870138

1 January 2008 Distance optical sensor for quantitative endoscopy

Agnese Lucesoli, Luigino Criante, Bruno Farabollini, Floriano Bonifazi, Francesco F. Simoni, Tullio Rozzi

Author Affiliations +

Journal of Biomedical Optics, Vol. 13, Issue 1, 010504 (January 2008). https://doi.org/10.1117/1.2870138

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.

©(2008) Society of Photo-Optical Instrumentation Engineers (SPIE)

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Agnese Lucesoli, Luigino Criante, Bruno Farabollini, Floriano Bonifazi, Francesco F. Simoni, and Tullio Rozzi "Distance optical sensor for quantitative endoscopy," Journal of Biomedical Optics 13(1), 010504 (1 January 2008). https://doi.org/10.1117/1.2870138

Published: 1 January 2008

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KEYWORDS

Endoscopy

Distance measurement

Endoscopes

Sensors

Signal detection

Optical sensors

Tissues

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