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A spatial resolution evaluation method of endoscopic optical coherence tomography system using the annular phantom
Author(s) -
Huang Ningning,
Deng Zhichao,
Hu Zhixiong,
Mei Jianchun,
Zhao Shiyong,
Wu Xining,
Jia Zongnan,
Liu Yuyan,
Wang Jin,
Ye Qing,
Tian Jianguo
Publication year - 2021
Publication title -
journal of biophotonics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.877
H-Index - 66
eISSN - 1864-0648
pISSN - 1864-063X
DOI - 10.1002/jbio.202100035
Subject(s) - imaging phantom , optical coherence tomography , endoscope , optics , image resolution , polydimethylsiloxane , biomedical engineering , point spread function , computer science , materials science , medical physics , physics , medicine , radiology , nanotechnology
As an important biomedical imaging method, endoscopic optical coherence tomography (OCT) is necessary to check its performance regularly. The ordinary plane phantoms are only able to evaluate part of image tangent to the probe. In this research, a spatial resolution estimate method of the endoscope OCT system is proposed. The annular phantom, made by uniformly distributing golden scattered microparticles in polydimethylsiloxane (PDMS), can provide dynamic scanning imaging evaluation of endoscopic OCT system, closer to its actual working status. The point spread function analysis method is used to analyze the imaging results of the annular phantom with the endoscopic OCT system. And many scattered particles are statistically analyzed to determine the spatial resolution of the endoscope OCT system. The method is low in cost, simple and convenient. It is valuable for the development of test standards for endoscope OCT systems.