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| Parameter | Definition |
|---|---|
| Central Deformation Amplitude (DA) | Displacement of the apex at highest concavity (HC) |
| Peripheral Deformation Amplitude (PDA) | Average Displacement at 2 mm from the apex on both sides at HC |
| Central- Peripheral Deformation Ratio (CPR) | DA/PDA |
| Time to Highest Concavity (THC) | Time from start until HC |
