Optimization of intraoperative spectrally encoded coherence tomography and reflectometry for ophthalmic surgery

Rachel Hecht; Jacob J. Watson; Eric Tang; Yuankai Tao

doi:10.1117/12.2649469

8 March 2023 Optimization of intraoperative spectrally encoded coherence tomography and reflectometry for ophthalmic surgery

Rachel Hecht, Jacob J. Watson, Eric Tang, Yuankai Tao

Author Affiliations +

Proceedings Volume 12367, Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XXVII; 1236709 (2023) https://doi.org/10.1117/12.2649469
Event: SPIE BiOS, 2023, San Francisco, California, United States

Abstract

Ophthalmic surgery is conventionally performed under white-light microscopy which has limited benefit for identifying tissue layers and providing depth-resolved feedback. Intraoperative optical coherence tomography (iOCT) has enabled depth-resolved intraoperative imaging of retinal microstructures. Recent advancements have enabled faster imaging speeds and video-rate, volumetric iOCT imaging of surgical dynamics, and en face retinal imaging that enables robust visualization of surgical instruments for tool-tracking. Here, we demonstrate our intraoperative spectrally encoded coherence tomography and reflectometry imaging (iSECTR) system with enhanced optical throughput and mechanical focus-adjust in a more clinically robust form-factor. iSECTR uses spatiotemporally co-registered multimodal spectrally encoded reflectometry (SER) and OCT for automated en face instrument-tracking and volumetric visualization of surgical dynamics. Here, we demonstrate several optical and optomechanical design improvements, which include the design of a modular aluminum skeleton to house SECTR imaging optics and optomechanics throughput to maintain system alignment and imaging performance. Mechanical focusing capabilities were integrated to accommodate for any adjustments to surgical oculars made by the ophthalmic surgeon before surgery for simultaneous optimal imaging in both iSECTR and the ocular view of the surgical field. We demonstrate ex vivo cornea and retinal imaging, and mechanical focusing capabilities using a stationary model eye and stepping through ± 10 diopters focal shift. We predict the addition of focusing capabilities and improvements in form-factor and optical throughput to our iSECTR system will benefit surgical translation and workflow for ophthalmic surgeries.

Conference Presentation

Citation Download Citation

Rachel Hecht, Jacob J. Watson, Eric Tang, and Yuankai Tao "Optimization of intraoperative spectrally encoded coherence tomography and reflectometry for ophthalmic surgery", Proc. SPIE 12367, Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XXVII, 1236709 (8 March 2023); https://doi.org/10.1117/12.2649469

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