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High-resolution OCT balloon imaging catheter with astigmatism correction
Jiefeng Xi1, Li Huo, Yicong Wu
1Department of Bioengineering, University of Washington, Seattle, WA 98195, USA.
Optics Letters
|July 3, 2009
Summary
New optical coherence tomography (OCT) balloon catheter designs achieve high resolution and long working distances. These innovations correct astigmatism, enabling detailed in vivo imaging of biological tissues.
Area of Science:
- Biomedical Optics
- Medical Imaging
- Catheter Technology
Background:
- Optical coherence tomography (OCT) is a valuable imaging modality.
- Existing OCT catheters face limitations in resolution, working distance, and astigmatism.
- Miniaturized optics for OCT catheters require specialized design considerations.
Purpose of the Study:
- To develop novel optics for an OCT balloon imaging catheter.
- To achieve diffraction-limited resolution at a large working distance.
- To correct severe astigmatism inherent in catheter designs.
Main Methods:
- Utilized a 1 mm gradient-index lens with a specific pitch number.
- Incorporated a glass rod spacer to optimize numerical aperture (NA).
- Developed a cylindrical reflector method to compensate for balloon-induced astigmatism.
Main Results:
- Successfully developed an OCT balloon catheter with diffraction-limited lateral resolution (~21 microm).
- Achieved a large working distance of approximately 11-12 mm.
- Demonstrated a round-shape beam profile and successful in vivo 3D imaging.
Conclusions:
- The new optics designs significantly enhance OCT balloon catheter performance.
- The developed catheter enables high-resolution, wide-field imaging in biological applications.
- This technology advances endoscopic OCT imaging capabilities.
