Related Experiment Video
Updated: Jun 18, 2026
06:31
Probe-based Confocal Laser Endomicroscopy of the Urinary Tract: The Technique
Published on: January 10, 2013
A miniature confocal Raman probe for endoscopic use
J C C Day1, R Bennett, B Smith
1University of Bristol, Interface Analysis Centre, 121 St Michaels Hill, Bristol, BS2 8 BS, UK. j.c.c.day@bris.ac.uk
Physics in Medicine and Biology
|November 12, 2009
Summary
This study introduces a miniature fiber optic probe for Raman spectroscopy, enabling rapid detection of biochemical changes in esophageal tissue during cancer development. The device offers a new tool for early diagnosis of esophageal malignancy.
Area of Science:
- Biomedical Optics
- Medical Spectroscopy
- Cancer Research
Background:
- Raman spectroscopy offers insights into biochemical changes within the human body.
- Standard medical endoscopes lack integrated tools for in-situ biochemical analysis.
- Esophageal malignancy presents a significant diagnostic challenge, necessitating advanced detection methods.
Purpose of the Study:
- To develop and characterize a miniature, confocal fiber optic probe for endoscopic Raman spectroscopy.
- To optimize the probe for studying the process of carcinogenesis in esophageal malignancy.
- To demonstrate the probe's capability in identifying biochemical alterations in resected esophageal tissue.
Main Methods:
- Design and fabrication of a miniature, confocal fiber optic probe compatible with standard medical endoscopes.
- Utilizing anisotropic wet etching for silicon motherboard and jig fabrication.
- Acquisition of Raman spectra from PTFE reference samples and resected human esophageal tissue.
Main Results:
- Successful fabrication of a miniature fiber optic probe for endoscopic Raman spectroscopy.
- Demonstration of rapid spectral acquisition (as low as 2 seconds) from esophageal tissue.
- Identification of distinct biochemical changes associated with various pathologies in esophageal tissue spectra.
Conclusions:
- The developed fiber optic probe is a viable tool for in-situ biochemical analysis during endoscopy.
- This technology has the potential to improve the early detection and characterization of esophageal malignancy.
- The probe's ability to detect biochemical changes in real-time can aid in understanding carcinogenesis.
Related Concept Videos
01:16Confocal Fluorescence Microscopy
Confocal microscopy is an advanced microscopic technique. The prime advantage of the confocal microscope over other microscopy techniques is its ability to block the out-of-focus light from the illuminated samples using pinholes. It is widely used with fluorescence optics to obtain high-resolution, sharp contrast images. Unlike optical microscopes, confocal microscopes use a focused beam of light laser to scan the entire sample surface at different z-planes. These microscopes are, therefore,...
01:26Raman Spectroscopy Instrumentation: Overview
A conventional Raman spectrophotometer includes a laser source, a sample holding system, a wavelength selector, and a detector.
The monochromatic laser source, typically using visible or near-infrared radiation, generates a highly focused beam of light. This light interacts with the molecules of the sample, scattering some of the light. Liquid and gaseous samples are usually tested in ordinary glass capillaries, while solids can be analyzed as powders packed in capillaries or as potassium...
The monochromatic laser source, typically using visible or near-infrared radiation, generates a highly focused beam of light. This light interacts with the molecules of the sample, scattering some of the light. Liquid and gaseous samples are usually tested in ordinary glass capillaries, while solids can be analyzed as powders packed in capillaries or as potassium...
01:22Overview of Microscopy Techniques
The early pioneers of microscopy opened a window into the invisible world of microorganisms. In 1830, Joseph Jackson Lister created an essentially modern light microscope. The 20th century saw the development of microscopes that leveraged nonvisible light, such as fluorescence microscopy that uses an ultraviolet light source and electron microscopy that uses short-wavelength electron beams. These advances significantly improved magnification, image resolution, and contrast. By comparison, the...