Table 1.
Comparison between GE Vivid 7 and Vevo 2100 in 2D-speckle tracking hardware and software abilities.
| Hardware abilities | ||
|---|---|---|
| GE Vivid 7 | Vevo 2100 | |
| Transducer frequency | 10–14 MHz | 18–38 MHz |
| Axial resolution | 200 µm | 50 µm |
| Lateral resolution | 300 µm | 110 µm |
| Transducer footprint | 28 mm × 10 mm | 20 mm × 5 mm |
| Temporal resolution | 130–190 fps | >200 fps |
| Detect respiratory cycle | Yes | Yes |
| Image acquisition | Conventional | Hand-free + conventional |
| Area of analysis | Myocardium | Endocardium + epicardium |
| ROI adjustment | Uniform | Individual |
| Ability to distinguish E/A wave when heart rate is more than 400 bpm | No | Yes |
| Marked AVC | Yes | No |
| FAC | Manual | Automated |
fps: frame per second, AVC: aortic valve closure, and FAC: fractional area change (defined as cross-sectional area change between end diastole and end systole).