Characterization of optical coherence tomography images acquired at large distances with large-diameter beams

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DOIResolve DOI: http://doi.org/10.1109/JPHOT.2014.2321754
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TypeArticle
Journal titleIEEE Photonics Journal
ISSN1943-0655
Volume6
Issue3
Article number6900111
SubjectImage analysis; Molecular physics; Photonics; Speckle; Beam configuration; Collimated beams; Imaging capabilities; Medical optics instrumentation; Signal intensities; System variations; Telecentric system; Visual appearance; Optical tomography
AbstractWe tested the imaging capabilities for variants of a 1550-nm swept-source fiber-based optical coherence tomography system with a telecentric system incorporated at the end of its sample arm. The system was designed for in vivo imaging of burns; therefore, we acquired images from samples located at distances greater than 24 cm from the exit of the telecentric system. Each system variation had a specific combination of diameters for the reference and sample beams. In the reference arm, we used, alternately, two collimated beams with diameters of 1.5 and 14 mm, respectively. In the sample arm, we tested collimated beams with the following diameters: 1.5, 3.5, 5.7, 8.4, and 14 mm. A galvanometric mirror system scanned the collimated sample beam across the entrance pupil of the telecentric system. The sample beam exited the telecentric system parallel with its optical axis and convergent onto the sample. Depending on the collimator used in the sample arm, images were acquired with beams focused to waist diameters ranging from 40 to 240 μm. We acquired images with the sample at different locations within a ±30 mm range centered about the sample beam waist. Furthermore, we used the signal-to-noise ratio, the detected signal intensity, and the visual appearance to compare images acquired with different sample/reference beam configurations. © 2014 IEEE.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); Medical Devices (MD-DM)
Peer reviewedYes
NPARC number21272118
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Record identifier153ece27-9c33-4976-95da-fd3cfbfe2fed
Record created2014-07-23
Record modified2016-05-09
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