Table 1. Comparison of Commercial Handheld OCT Systems to the Prototype Handheld OCT System.
Specification | Bioptigen Envisu | Optovue iVue | Prototype Handheld |
---|---|---|---|
OCT Technology | SD-OCT | SD-OCT | SS-OCT |
Imaging Speed | 32,000 A-scan/s | 26,000 A-scan/s | 350,000 A-scan/s |
Imaging Range in Tissue | 1.7 mm (C2200) 2.5 mm C2300) |
2 – 2.3 mm | 3.08 mm |
Axial Resolution in Tissue | 6 µm (HR source) 3 µm (VHR source) |
5 µm | 10 µm |
Operating Wavelength | ~840 nm | ~840 nm | ~1060 nm |
Scanning Mirror Type | Galvanometer | Galvanometer | 2D MEMS |
Dimensions (L x H x W) |
23 cm x 18 cm x 8 cm (including lens) |
28 cm x 32 cm x 14 cm | 15 cm x 18 cm x 7 cm (Power Grip) 16 cm x 10 cm x 14 cm (Camcorder) |
Handheld Weight | 1.5 kg (with lens) | 2.2 kg | 0.50 kg (Power Grip) 0.42 kg (Camcorder) |
Refractive Error Correction | Manual | Motorized | Manual |
Display on Handheld | N/A | LCD Touch Screen | LCD Screen |
Alignment Aids | OCT Preview Scans | OCT Preview Scans IR Camera Fixation Target |
OCT Preview Scans Iris Camera Fixation Target |
Ophthalmic Imaging | Retinal Anterior Segment |
Retinal Anterior Segment |
Retinal |