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High speed material as a proportion of phantom volume: QBD value vs geometry‐based value
| Phantom | QBD value, % | Geometry‐based value, % |
|---|---|---|
| Cylindrical phantom with cylindrical inclusions | 4.09 | 3.96 |
| Cylindrical phantom with spherical inclusions | 1.00 | 0.92 |
| Calibration phantom (with rods and spheres) | 18.66 | 18.70 |
