| Iteration 1 | Iteration 2 | Iteration 3 | Iteration 4y | Strain Estimation |
---|---|---|---|---|---|
Data input | Envelope | RF data | RF data | RF data | Radial displacements |
Pre-kernel size (mm x mm) | 1.3 × 0.6a | 0.6 × 0.6a | 0.3 × 0.6a | 0.3 × 0.6a | - |
Post-kernel size (mm x mm) | 1.9 × 1.8a | 0.9 × 1.8a | 0.5 × 1.8a | 0.5 × 1.8a | - |
Axial kernel overlap (%) | 80 | 80 | 80 | 80 | - |
Lateral kernel overlap (%) | 67 | 67 | 67 | 67 | - |
Median filter size (mm x mm) | 2.2 × 1.8a | 1.1 × 1.8a | 0.6 × 1.8a | 0.9 × 0.6az 0.6 × 0.6az | 21° × 0.5 mmx |
2D least squares strain estimator size (° x mm) | - | - | - | - | 9° × 0.5 mmx |