Table 1.
Optimal setting for tissue Doppler deformation measurement
| Term infants | Preterm infants | |
|---|---|---|
| Probe | 5s or 7s | 10s or 12s |
| Sector width | Narrow | Narrow |
| Sector depth | Shallow | Shallow |
| Velocity scale (cm/s) (avoid aliasing) | −16 to 16 | −16 to 16 |
| Transducer frequency (MHz) | 2.5–3.0 | 8.0 |
| Pulse repetition frequency (kHz) | 1.0 | 2.0 |
| Velocity scale (cm/s) | 16 | 16 |
| Frame rate (FPS) | >200 | >200 |
| Region of interest length (mm) | 1 | 1 |
| Region of interest width (mm) | 2 or 3 | 2 or 3 |
| Strain length (mm) | 10–20 | 6 |
| Linear drift compensation | On | On |
| Gaussian smoothing | On | On |
These settings apply for the General Electric Vivid scanners and Echo Pac Software (GE Medical, Milwaukee, USA). These recommendations are a guide only and setting may differ depending on new information emerging