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A spatial resolution evaluation method of endoscopic optical coherence tomography system using the annular phantom.

Ningning Huang1, Zhichao Deng1,2, Zhixiong Hu3

  • 1The Key Laboratory of Weak-Light Nonlinear Photonics, MOE, School of Physics and TEDA Applied Physics School, Nankai University, Tianjin, China.

Journal of Biophotonics
|May 15, 2021
PubMed
Summary

A new annular phantom and spatial resolution method for endoscopic optical coherence tomography (OCT) systems are proposed. This cost-effective approach offers dynamic evaluation closer to real-world conditions, aiding in OCT performance testing.

Keywords:
annular phantomsendoscopic optical coherence tomographypoint spread functionspatial resolution

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Area of Science:

  • Biomedical Imaging
  • Optical Coherence Tomography
  • Medical Device Testing

Background:

  • Endoscopic optical coherence tomography (OCT) is crucial for biomedical imaging.
  • Regular performance evaluation of endoscopic OCT systems is necessary.
  • Existing plane phantoms offer limited assessment of OCT probe-image tangency.

Purpose of the Study:

  • To propose a novel spatial resolution estimation method for endoscopic OCT systems.
  • To develop an annular phantom for more realistic OCT system evaluation.
  • To establish a cost-effective and convenient method for assessing endoscopic OCT performance.

Main Methods:

  • Developed an annular phantom using golden microparticles in polydimethylsiloxane (PDMS).
  • Employed dynamic scanning imaging with the annular phantom and endoscopic OCT.
  • Utilized point spread function analysis and statistical analysis of scattered particles.

Main Results:

  • The annular phantom provides imaging evaluation closer to the actual working status of endoscopic OCT.
  • Spatial resolution was determined by statistically analyzing scattered particles from the phantom.
  • The proposed method is demonstrated to be effective for spatial resolution estimation.

Conclusions:

  • The developed annular phantom and spatial resolution estimation method are valuable for endoscopic OCT systems.
  • This approach offers a simple, convenient, and low-cost solution for OCT performance testing.
  • The method contributes to the development of standardized test procedures for endoscopic OCT.