High-speed submillimeter magnetic-driven rotational scanning side-imaging OCT probe.

Area of Science:

• Biomedical Engineering
• Optical Imaging
• Medical Devices

Background:

• Endoscopic optical coherence tomography (OCT) requires high-speed, miniaturized probes for intravascular imaging.
• Existing probes face limitations in scanning speed and field of view.

Discussion:

• A novel high-speed side-imaging magnetic-driven scanning (MDS) probe (0.89 mm diameter) was developed for endoscopic OCT.
• The probe utilizes a micromirror attached to a magnet, driven by an external magnetic field for 360-degree scanning.
• This design enables unobstructed side-view imaging within anatomical lumens.

Key Insights:

• The prototype probe achieved 100 frames per second imaging of ex vivo porcine arteries with implanted stents.
• System sensitivity was 95 dB with 6 mW output power, and resolutions were 10.3 μm (axial) and 39.7 μm (lateral).
• The swept-source OCT system integrated with the MDS probe demonstrated effective intravascular imaging capabilities.

Outlook:

• The high-speed, submillimeter MDS-OCT probe presents a significant advancement for intravascular imaging.
• Further development could enhance resolution and sensitivity for clinical applications.
• This technology holds potential for improved diagnosis and treatment monitoring in cardiovascular interventions.