Abstract
We present an endoscopic probe for optical coherence tomography (OCT) equipped with a miniaturized hollow ultrasonic motor that rotates the objective lens and provides an internal channel for the fiber to pass through, enabling 360 deg unobstructed circumferential scanning. This probe has an outer diameter of 1.5 mm, which is ultra-small for motorized probes with an unobstructed view in distal scanning endoscopic OCT. Instead of a mirror or prism, a customized aspheric right-angle lens is utilized, leading to an enlargement of the numerical aperture and thus high transverse resolution. Spectral-domain OCT imaging of bio-tissue and a phantom are demonstrated with resolution of 7.5 μm(axial)×6.6 μm(lateral) and sensitivity of 96 dB.
Highlights
Optical coherence tomography (OCT) is an emerging modality for obtaining cross-sectional images.[1]
We propose a new stationary-fiber ultra-small probe, which is equipped with a novel miniaturized hollow ultrasonic motor and a custom-designed objective lens to achieve high lateral resolution
To illustrate the performance of our probe, we integrate the probe with a spectral-domain optical coherence tomography (SD-OCT) system
Summary
Optical coherence tomography (OCT) is an emerging modality for obtaining cross-sectional images.[1]. Distal scanning is of high interest, which is mainly implemented by attaching the deflection prism to a micro-motor at the distal end In this case, the whole fiber remains stationary, so the twisting and nonuniformity problems are avoided.[11] this design has two challenges. The novel hollow ultrasonic motor enables the fiber to pass through its inside and permits having the fiber, the objective lens and the motor on the same side, enabling 360 deg imaging without any shadow resulted from light blocking by the power wires as in the traditional motor-driven endoscopic OCT. Instead of the traditional prism, an aspheric right-angle lens is utilized to be the last optics surface that optimized the size of the light spot This probe achieves an outer diameter of 1.5 mm, which is ultra-small for shadow-free rotary probe in distal scanning endoscopic OCT
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
