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Diffractive catheter for ultrahigh-resolution spectral-domain volumetric OCT imaging
Optics Letters
|April 2, 2014
Summary
We developed an ultrahigh-resolution endoscopic imaging catheter using diffractive optics for optical coherence tomography (OCT). This novel design achieves 6.2 μm lateral and 3.0 μm axial resolution, enabling detailed in vivo imaging.
Area of Science:
- Biomedical Optics
- Medical Imaging
- Optical Engineering
Background:
- Optical coherence tomography (OCT) provides high-resolution cross-sectional imaging.
- Endoscopic OCT requires miniaturized imaging probes with high resolution.
- Chromatic aberration is a significant challenge in broadband OCT systems.
Purpose of the Study:
- To develop a novel endoscopic imaging catheter for ultrahigh-resolution OCT.
- To address chromatic aberration using diffractive optics for OCT at 800 nm.
- To demonstrate in vivo endoscopic OCT imaging of biological tissues.
Main Methods:
- Designed and fabricated a diffractive microlens to correct chromatic aberration.
- Integrated the diffractive optic into an endoscopic imaging catheter.
- Utilized a broadband Ti:sapphire laser and a home-built fiber rotary joint.
- Performed three-dimensional full-circumferential endoscopic OCT imaging in vivo.
Main Results:
- Achieved a lateral resolution of 6.2 μm and an axial resolution of 3.0 μm.
- Successfully mitigated chromatic aberration using the diffractive microlens.
- Demonstrated high-resolution endoscopic OCT imaging of guinea pig esophagus.
Conclusions:
- The novel diffractive optics-based endoscopic catheter enables ultrahigh-resolution OCT.
- This technology has potential for advanced in vivo endoscopic imaging applications.
- The design effectively overcomes chromatic aberration challenges in broadband OCT.
