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En face optical coherence tomography: a technology review [Invited].

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En face optical coherence tomography (OCT) and optical coherence microscopy (OCM) have advanced significantly. Modern en face OCT offers rapid, interpretable imaging, particularly for ophthalmology applications.

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Area of Science:

  • Biomedical Optics
  • Medical Imaging Technology

Background:

  • Review of technological advancements in en face optical coherence tomography (OCT) and optical coherence microscopy (OCM).
  • Historical context of en face OCT terminology, initially linked to time-domain OCT with en face plane scanning.

Purpose of the Study:

  • To provide a comprehensive review of the technological development of en face OCT and OCM.
  • To highlight the advantages and applications of modern en face OCT, especially in ophthalmology.
  • To discuss future technological prospects for en face OCT.

Main Methods:

  • Exploration of full-field OCT as a rapid en face image acquisition method.
  • Discussion of high-speed Fourier domain OCT approaches for en face image reconstruction from 3D volumes.
  • Analysis of image interpretation benefits for OCM and OCT angiography.

Main Results:

  • Modern en face OCT, including Fourier domain methods, enables efficient en face image reconstruction.
  • The immediate and intuitive image interpretation of en face OCT is a key advantage.
  • En face OCT demonstrates significant utility in ophthalmological applications.

Conclusions:

  • En face OCT technology has evolved considerably, offering significant advantages in imaging speed and interpretation.
  • Future developments in both time-domain and Fourier-domain OCT promise further advancements in en face imaging.
  • En face OCT is a valuable tool with expanding applications, particularly in ophthalmology.