Related Experiment Videos
Paired-angle-rotation scanning optical coherence tomography forward-imaging probe.
Jigang Wu1, Michael Conry, Chunhui Gu
1Department of Electrical Engineering, California Institute of Technology, California 91125, USA. jigang@caltech.edu
Optics Letters
|April 28, 2006
Summary
A new optical coherence tomography (OCT) needle probe, called paired-angle-rotation scanning OCT (PARS-OCT), enables wide-angle forward imaging. This miniaturized probe offers versatile scanning modes for detailed biological imaging.
Area of Science:
- Biomedical Optics
- Medical Imaging Technology
- Microscopy
Background:
- Optical coherence tomography (OCT) is a valuable non-invasive imaging technique.
- Existing OCT probes face limitations in field of view and maneuverability for certain applications.
- Needle-probe based OCT offers potential for in-situ and minimally invasive imaging.
Purpose of the Study:
- To introduce a novel forward-imaging OCT needle probe design.
- To demonstrate the capabilities of the paired-angle-rotation scanning OCT (PARS-OCT) probe.
- To evaluate the performance of the PARS-OCT probe in biological imaging.
Main Methods:
- Developed a PARS-OCT probe utilizing two rotating angled gradient-index lenses for beam steering.
- Designed the probe for miniaturization, achieving an outer diameter of 1.65 mm.
- Acquired multi-angle OCT images of *Xenopus laevis* tadpole gills.
Main Results:
- The PARS-OCT probe achieved a wide angular scan range of approximately 19 degrees half-angle.
- Demonstrated volumetric scanning capability with the miniaturized probe.
- Achieved high system sensitivity (93 dB) and excellent resolutions (axial: 9.3 µm, lateral: 10.3–12.5 µm).
Conclusions:
- The novel PARS-OCT needle probe offers significant advantages for forward-imaging OCT.
- The probe's miniaturization and wide-angle scanning are suitable for delicate biological sample imaging.
- PARS-OCT technology holds promise for advancing minimally invasive biomedical imaging applications.