Multidimensional en-face OCT imaging of the retina

Area of Science:

• Ophthalmology
• Medical Imaging
• Biomedical Engineering

Background:

• Optical coherence tomography (OCT) is crucial for retinal imaging.
• En-face (coronal) imaging provides unique retinal perspectives.
• Integrating multiple imaging modalities can enhance diagnostic capabilities.

Purpose of the Study:

• To evaluate a multi-modal OCT system combining T-scan, confocal scanning laser ophthalmoscopy (SLO), and indocyanine green (ICG) fluorescence imaging.
• To demonstrate the benefits of simultaneous multi-channel imaging for retinal analysis.
• To showcase the synergy between different imaging modalities for improved diagnostic interpretation.

Main Methods:

• Utilized fast T-scanning (transverse scanning, en-face) OCT to generate B-scan and C-scan images.
• Acquired simultaneous confocal SLO and ICG fluorescence images.
• Integrated a fourth channel for live mixed-frame display of ICG and OCT data.
• Employed OSA ISP software for data analysis and visualization.

Main Results:

• Generated unique en-face OCT signature patterns correlated with confocal and B-scan OCT images.
• Demonstrated the multichannel potential of the OCT/SLO system with ICG fluorescence.
• Simultaneously presented OCT, confocal SLO, and ICG images.
• Showcased immediate multidimensional comparison via a live mixed-frame channel.
• Illustrated synergy between imaging modalities for enhanced diagnostic comparisons and artifact correction.

Conclusions:

• The combined multi-modal imaging system offers significant advantages over traditional OCT.
• Synergistic presentation of OCT, confocal SLO, and ICG data enhances diagnostic interpretation.
• The system facilitates improved artifact correction in OCT imaging through integrated confocal SLO data.