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Distance optical sensor for quantitative endoscopy.

Agnese Lucesoli1, Luigino Criante, Bruno Farabollini

  • 1Università Politecnica delle Marche, Dipartimento di Elettromagnetismo e Bioingegneria, via Brecce Bianche, Ancona, Italy.

Journal of Biomedical Optics
|March 5, 2008
PubMed
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A new fiber optic low-coherence interferometry (FOLCI) sensor accurately measures distances in medical endoscopy. This optical sensor provides precise measurements of anatomical objects, overcoming limitations of current qualitative endoscopic examinations.

Area of Science:

  • Biomedical Engineering
  • Optical Sensing Technologies
  • Medical Imaging

Background:

  • Current endoscopic examinations are primarily qualitative due to magnification challenges.
  • Accurate distance measurement is crucial for quantitative analysis of anatomical structures.
  • Existing endoscopic methods lack the ability to calibrate images effectively.

Purpose of the Study:

  • To develop a novel optical sensor for precise distance measurement in medical endoscopy.
  • To overcome the limitations of qualitative endoscopic observations.
  • To enable quantitative imaging and accurate dimensional analysis of anatomical objects.

Main Methods:

  • An absolute distance sensor was designed and realized using fiber optic low-coherence interferometry (FOLCI).

Related Experiment Videos

  • The FOLCI sensor was tested under simulated physiological conditions (37°C, high humidity).
  • Measurements were performed on biological samples, specifically pig trachea.

    • Main Results:

    • The FOLCI sensor demonstrated high sensitivity and accuracy in distance measurements.
    • Repeatable measurements were achieved even with very low reflected optical power (2-3 nW).
    • The sensor achieved a measurement error of less than 0.1 mm on biological samples.

    Conclusions:

    • The developed FOLCI sensor effectively addresses the need for quantitative measurements in endoscopy.
    • This technology enhances the potential for both clinical investigation and research applications.
    • The sensor offers a reliable solution for accurate dimensional assessment of anatomical objects during endoscopic procedures.