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Unique features of optical scanning, single fiber endoscopy
Eric J Seibel1, Quinn Y J Smithwick
1Department of Mechanical Engineering, Human Interface Technology Laboratory, University of Washington, Seattle, Washington.
Background And Objective:
To advance the field of minimally invasive medical procedures, an ideal endoscope should provide high-resolution images with variable magnification from an ultra-thin package, while adding depth cues and integrating optical diagnoses and therapies. Satisfying all these requirements is extremely difficult using commercial endoscopes. A new imaging technology is introduced that uses directed laser illumination, which is scanned at the distal end of a flexible endoscope.
Study Design/Materials And Methods:
A single-mode optical fiber is driven in vibratory resonance using a piezoelectric actuator. The emitted laser light is scanned in two-dimensions over test specimens. Digital images are constructed by detecting optical power one pixel at a time.
Results:
Unique features of the fiber scanning scope are rapidly changing magnification, enhanced topographic detail, and concurrent fluorescence imaging, which are demonstrated and discussed.
Conclusion:
This fiber scanning scope has the potential for pixel-accurate delivery of high quality laser radiation, allowing the future integration of imaging with diagnosis and therapy.