Table 1.
Comparison of optical coherence tomography angiography (OCTA) systems and their specifications.
| OCTA System | OCT Model | Optical Source, nm | Scan Speed | Resolution (Axial × Transverse, Microns) | Imaging Depth, mm | Imaging Size, mm | Imaging Volume | Theoretical Acquisition Time, s |
|---|---|---|---|---|---|---|---|---|
| Zeiss AngioPlex | Cirrus HD-OCT 5000; SD-OCT | 840 | 68,000 | 5 × 15 | 2 | 3 × 3, 6 × 6 | 245 × 245 or 350 × 350 | 3.6 |
| Optovue AngioVue | RTVue XR AVANTI; SD-OCT | 840 | 70,000 | 5 × 15 | 2.0–3.0 | 3 × 3, 6 × 6, 8 × 8 | 304 × 304 or 400 × 400 | 3 |
| Topcon Triton | DRI Triton; SS-OCT | 1050 | 100,000 | 8 × 20 | 2.6 | 3 × 3, 6 × 6 | 256 × 256, 320 × 320 | 2.7 |
| Heidelberg Spectralis | Spectralis OCT2; SD-OCT | 870 | 85,000 | 5 × 6 | 2 | 3 × 3 | 256 × 256, 512 × 512 | 5.4 |
| Nidek AngioScan | RS-3000 Advance; SD-OCT | 880 | 53,000 | 7 × 20 | 2.1 | 3 × 3 to 9 × 9 | 256 × 256 | 2.5 |
| Canon Angio eXpert | OCT-HS100; SD-OCT | 855 | 70,000 | no data | no data | 3 × 3 to 8 × 8 | no data | 3 |