Abstract
This feature issue contains papers that report on the most recent advances in the field of en face optical coherence tomography (OCT) and of combinations of modalities facilitated by the en face view. Hardware configurations for delivery of en face OCT images are described as well as specific signal and image processing techniques tailored to deliver relevant clinical diagnoses. The value of the en face perspective for enabling multimodality is illustrated by several combination modalities.
Highlights
Depending on the underlying imaging technology, images with different preferential orientations have been combined with varying degrees of success
In optical coherence tomography (OCT), for example, onedimensional depth profiles (A-scans) are typically acquired and are combined into a cross sectional image (B-scan). This presents a specific set of challenges for a combination of this technique with e.g. confocal microscopy (CM) or scanning laser ophthalmoscopy (SLO), as the image acquisition of both latter methods lies in the en face plane, that is orthogonal to that of the more conventional cross sectioning OCT imaging
The multimodality seed launched by the OCT/SLO combination is reflected in the more than 5 million web search hits generated by the acronym
Summary
Depending on the underlying imaging technology, images with different preferential orientations have been combined with varying degrees of success. Many different approaches have been reported to date, which include combining optical coherence tomography (OCT), microscopy, scanning laser ophthalmoscopy (SLO), fluorescence imaging, multi-photon imaging, Raman spectroscopy, microperimetry, electrophysiology, oximetry, photo-acoustics, and others.
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