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Description of isotropic and directiongroupsy dependent phantoms.
| Phantom | Materials | Volume fraction (%) | |
|---|---|---|---|
| Baseline | BG | Elastic cube (95 × 95 × 40 mm) | 94 |
| Isotropic | I | Elastic sphere (r = 17.5 mm) | 6 |
| Phantom E | BG | Elastic cube (95 × 95 × 40 mm) | 85 |
| Orthotropic | I | Orthotropic ring (R = 38 mm, r = 18 mm, h = 10 mm) | 15 |
