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Proceedings Paper

LED-based endoscopic light source for spectral imaging
Author(s): Craig M. Browning; Samuel Mayes; Peter Favreau; Thomas C. Rich; Silas J. Leavesley
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Paper Abstract

Colorectal cancer is the United States 3rd leading cancer in death rates.1 The current screening for colorectal cancer is an endoscopic procedure using white light endoscopy (WLE). There are multiple new methods testing to replace WLE, for example narrow band imaging and autofluorescence imaging.2 However, these methods do not meet the need for a higher specificity or sensitivity. The goal for this project is to modify the presently used endoscope light source to house 16 narrow wavelength LEDs for spectral imaging in real time while increasing sensitivity and specificity.
The process to do such was to take an Olympus CLK-4 light source, replace the light and electronics with 16 LEDs and new circuitry. This allows control of the power and intensity of the LEDs. This required a larger enclosure to house a bracket system for the solid light guide (lightpipe), three new circuit boards, a power source and National Instruments hardware/software for computer control.
The results were a successfully designed retrofit with all the new features. The LED testing resulted in the ability to control each wavelength’s intensity. The measured intensity over the voltage range will provide the information needed to couple the camera for imaging.
Overall the project was successful; the modifications to the light source added the controllable LEDs. This brings the research one step closer to the main goal of spectral imaging for early detection of colorectal cancer. Future goals will be to connect the camera and test the imaging process.

Paper Details

Date Published: 7 March 2016
PDF: 6 pages
Proc. SPIE 9703, Optical Biopsy XIV: Toward Real-Time Spectroscopic Imaging and Diagnosis, 97031I (7 March 2016); doi: 10.1117/12.2213200
Show Author Affiliations
Craig M. Browning, Univ. of South Alabama (United States)
Samuel Mayes, Univ. of South Alabama (United States)
Peter Favreau, Univ. of South Alabama (United States)
Thomas C. Rich, Univ. of South Alabama (United States)
Silas J. Leavesley, Univ. of South Alabama (United States)


Published in SPIE Proceedings Vol. 9703:
Optical Biopsy XIV: Toward Real-Time Spectroscopic Imaging and Diagnosis
Robert R. Alfano; Stavros G. Demos, Editor(s)

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