Publication detail

Combining Gabor and Talbot bands techniques to enhance the sensitivity with depth in Fourier domain optical coherence tomography

BRADU, A. MARQUES, M. BOUCHAL, P. PODOLEANU, A.

Czech title

Zvýšení hloubkové citlivosti Fourierovské optické koherentní tomografii využívající Gaborovy fúze obrazu a Talbotových pásů

English title

Combining Gabor and Talbot bands techniques to enhance the sensitivity with depth in Fourier domain optical coherence tomography

Type

conference paper

Language

en

Original abstract

The purpose of this study was to show how to favorably mix two effects to improve the sensitivity with depth in Fourier domain optical coherence tomography (OCT): Talbot bands (TB) and Gabor-based fusion (GF) technique. TB operation is achieved by directing the two beams, from the object arm and from the reference arm in the OCT interferometer, along parallel separate paths towards the spectrometer. By changing the lateral gap between the two beams in their path towards the spectrometer, the position for the maximum sensitivity versus the optical path difference in the interferometer is adjusted. For five values of the focus position, the gap between the two beams is readjusted to reach maximum sensitivity. Then, similar to the procedure employed in the GF technique, a composite image is formed by edging together the parts of the five images that exhibited maximum brightness. The combined procedure, TB/GF is examined for four different values of the beam diameters of the two beams. Also we demonstrate volumetric FD-OCT images with mirror term attenuation and sensitivity profile shifted towards higher OPD values by applying a Talbot bands configuration.

Czech abstract

Cílem studie je představit metodiku efektivního využití dvou známých technik pro zvýšení hloubkové citlivosti ve Fourierovské optické koherentní tomografii. Modifikovaný interferometr umožňuje příčně separovat dva interferometrické svazky při cestě do spektrometru a optimalizovat tak kontrast detekovaného signálu ve vybraných hloubkách zobrazovaného objektu. Pro dosažení maximálního kontrastu je tato optimalizace doprovázena přeostřováním v předmětové větvi interferometru. Mezera mezi svazky je pro dosažení nejvyšší citlivosti postupně měněna pro pět ruzných pozic zaostření v odlišných hloubkách objektu. Výsledný obraz vzniká složením optimalizovaných částí do jednoho celku. Dále jsou demonstrovány výsledky objemové Fourierovské optické koherentní tomografie se zvýšenou hloubkovou citlivostí.

English abstract

The purpose of this study was to show how to favorably mix two effects to improve the sensitivity with depth in Fourier domain optical coherence tomography (OCT): Talbot bands (TB) and Gabor-based fusion (GF) technique. TB operation is achieved by directing the two beams, from the object arm and from the reference arm in the OCT interferometer, along parallel separate paths towards the spectrometer. By changing the lateral gap between the two beams in their path towards the spectrometer, the position for the maximum sensitivity versus the optical path difference in the interferometer is adjusted. For five values of the focus position, the gap between the two beams is readjusted to reach maximum sensitivity. Then, similar to the procedure employed in the GF technique, a composite image is formed by edging together the parts of the five images that exhibited maximum brightness. The combined procedure, TB/GF is examined for four different values of the beam diameters of the two beams. Also we demonstrate volumetric FD-OCT images with mirror term attenuation and sensitivity profile shifted towards higher OPD values by applying a Talbot bands configuration.

Keywords in English

optical coherence tomography, Talbot bands, Gabor fusion technique, mirror terms

RIV year

2013

Released

20.03.2013

Location

BELLINGHAM, WA 98227-0010 USA

ISBN

9780819493408

ISSN

0277-786X

Book

Proc. SPIE 8571, Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XVII

Volume

8571

Pages from–to

[1]–[6]

Pages count

6

BIBTEX


@inproceedings{BUT99008,
  author="Adrian {Bradu} and Manuel {Marques} and Petr {Bouchal} and Adrian {Podoleanu},
  title="Combining Gabor and Talbot bands techniques to enhance the sensitivity with depth in Fourier domain optical coherence tomography",
  booktitle="Proc. SPIE 8571, Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XVII",
  year="2013",
  volume="8571",
  month="March",
  pages="[1]--[6]",
  address="BELLINGHAM, WA 98227-0010 USA",
  isbn="9780819493408",
  issn="0277-786X"
}