Figure 4
4D MIOCT improves the control of instrument placement relative to tissue in mock surgical trials.
Three ophthalmic surgeons were asked to place their instrument as close to retina as possible without contacting tissue during simulated porcine eye retinal surgery. Each surgeon performed the maneuver 8 times with and without 4D MIOCT guidance. (A) Porcine retina as viewed through the operating microscope. The green dashed box denotes the 5 × 5 mm MIOCT lateral field of view. (B) B-scan located at the point of the instrument’s closest proximity to the retinal surface. The instrument and retina are labeled in red and yellow, respectively. The cross-sectional view allowed accurate grading of the instrument/retina distance. (C) Corresponding volumetric image with the B-scans (B) location denoted by the white rectangle. In this trial, the surgeon placed the instrument 214 μm above the retinal surface. (D–F) Box plots summarizing instrument placement relative to the retinal surface with and without MIOCT guidance for all 3 ophthalmic surgeon participating in the study. Improved visual feedback with MIOCT guidance allowed each surgeon to place their instrument closer to the retinal surface (closer to zero without contacting) than without MIOCT guidance.
