Table 2.
Comparison: optical coherence tomography versus intravascular ultrasound.
| OCT | IVUS | |
|---|---|---|
| Frame rate (s) | 100 | 30 |
| Pullback speed (mm/s) | 20 | 0.5–1.0 |
| Lines per frame | 500 | 256 |
| Axial resolution (μm) | 12–15 | 150 |
| Scan diameter in contrast (mm) | 10 | 15–20 |
| Tissue penetration (mm) | 1.0–2.0 | 10 |
| Ease of use | ++ | ++/+++ |
| Need for contrast or dextran | Yes | No |
| Detection of lipid | +++ | +/++ |
| Detection of fibrous cap | +++ | + |
| Detection of thrombus | ++ | + |
| Detection of calcium | ++ | +++ |
| Dissection | +++ | ++ |
| Malapposition | +++ | ++ |
| Stent strut surface coverage | +++ | + |
IVUS, intravascular ultrasound; OCT, optical coherence tomography.