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Related Experiment Video

Updated: Jun 9, 2026

Multimodal Volumetric Retinal Imaging by Oblique Scanning Laser Ophthalmoscopy oSLO and Optical Coherence Tomography OCT

Multimodal Volumetric Retinal Imaging by Oblique Scanning Laser Ophthalmoscopy oSLO and Optical Coherence Tomography OCT

Published on: August 4, 2018

Distal planar rotary scanner for endoscopic optical coherence tomography.

Kyle Searles¹, Nabil Shalabi², Geoffrey Hohert³

¹School of Biomedical Engineering, University of British Columbia, Vancouver, BC V6T 1Z3 Canada.

Biomedical Engineering Letters

|April 22, 2024

Summary

A novel hollow micro scanner enhances endoscopic optical coherence tomography (OCT) for disease detection. This improved scanner achieves faster speeds and high-quality 3D imaging of small lumens, crucial for medical diagnostics.

Keywords:

Electromagnetic actuator Endoscopic probe Ferrofluid Optical coherence tomography Optical scanner

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Last Updated: Jun 9, 2026

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Area of Science:

Biomedical Engineering
Optical Imaging
Medical Devices

Background:

Optical coherence tomography (OCT) offers high-resolution imaging for disease detection and treatment.
Conventional OCT methods struggle with 3D imaging of small lumens.
Integrating scanners at the distal end of endoscopic probes is a promising approach for advanced OCT imaging.

Purpose of the Study:

To propose and prototype a hollow, planar micro rotary actuator for use as an endoscopic distal scanner in OCT.
To develop a miniaturized, ferrofluid-assisted electromagnetic actuator for 360° optical scanning.
To evaluate the performance and effectiveness of the prototyped scanner for real-time endoscopic OCT.

Main Methods:

Designed and prototyped a hollow and planar micro rotary actuator.
Integrated the actuator with a fiber-optic probe and gradient-index lens for OCT.
Tested the scanner's dynamic performance, thermal limits, and imaging capabilities on human tissue samples.

Main Results:

The scanner achieved a maximum speed of 6500 rpm, a 325% improvement over previous designs.
The device operated below safe thermal limits for in-vivo use.
Real-time OCT imaging demonstrated clear differentiation of skin layers and sweat glands without image shadows.

Conclusions:

The prototyped hollow micro scanner is effective for high-quality, real-time endoscopic OCT.
The scanner's design overcomes limitations of conventional methods for small lumen imaging.
This technology holds significant potential for advancing disease detection and treatment using OCT.