The scanning fiber endoscope (SFE) is a new ultrathin (1.2 mm diameter) medical imaging device that utilizes a unique mechanical scanning technique to image large (120 deg) fields of view (FOVs). A single 80 μm optical fiber is circularly vibrated by a piezo-electric tube to illuminate a field while the reflected light is collected to construct an image pixel-by-pixel. Accurate scanning of the optical fiber is paramount to image quality. Previously, an optical calibration chamber in the base station was used to calibrate the scanning of the optical fiber. This analytical and experimental work eliminates the use of the calibration chamber by implementing a new piezoelectric sensing approach enabling self-contained recalibration to maintain high-image quality during long medical procedures and also reducing the cost, size, and power consumption of the SFE. This work provides a major step toward self-calibration through adaptive control without additional sensors.
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March 2015
Research-Article
Self-Contained Image Recalibration in a Scanning Fiber Endoscope Using Piezoelectric Sensing
I. L. Yeoh,
I. L. Yeoh
Department of Mechanical Engineering,
e-mail: ivanyeoh@uw.edu
University of Washington
,Seattle, WA 98195
e-mail: ivanyeoh@uw.edu
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P. G. Reinhall,
P. G. Reinhall
Department of Mechanical Engineering,
University of Washington
,Seattle, WA 98195
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M. C. Berg,
M. C. Berg
Department of Mechanical Engineering,
University of Washington
,Seattle, WA 98195
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E. J. Seibel
E. J. Seibel
Department of Mechanical Engineering,
University of Washington
,Seattle, WA 98195
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I. L. Yeoh
Department of Mechanical Engineering,
e-mail: ivanyeoh@uw.edu
University of Washington
,Seattle, WA 98195
e-mail: ivanyeoh@uw.edu
P. G. Reinhall
Department of Mechanical Engineering,
University of Washington
,Seattle, WA 98195
M. C. Berg
Department of Mechanical Engineering,
University of Washington
,Seattle, WA 98195
E. J. Seibel
Department of Mechanical Engineering,
University of Washington
,Seattle, WA 98195
Manuscript received April 11, 2014; final manuscript received September 15, 2014; published online November 14, 2014. Assoc. Editor: Rafael V. Davalos.
J. Med. Devices. Mar 2015, 9(1): 011004 (9 pages)
Published Online: March 1, 2015
Article history
Received:
April 11, 2014
Revision Received:
September 15, 2014
Online:
November 14, 2014
Citation
Yeoh, I. L., Reinhall, P. G., Berg, M. C., and Seibel, E. J. (March 1, 2015). "Self-Contained Image Recalibration in a Scanning Fiber Endoscope Using Piezoelectric Sensing." ASME. J. Med. Devices. March 2015; 9(1): 011004. https://doi.org/10.1115/1.4028652
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