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Uncertainties (1σ) in SPR estimation caused by different uncertainty sources.
| Uncertainty source | SPR estimation uncertainties (1σ) | ||
|---|---|---|---|
|
| |||
| Lung (%) | Soft (%) | Bone (%) | |
| DECT imaging uncertainty | 3.6 | 0.9 | 1.8 |
| DECT modeling uncertainty | 1.3 | 0.6 | 0.4 |
| DECT inherent uncertainty | 0.1 | 0.3 | 0.2 |
| Uncertainty in the determination of I | 0.2 | 0.2 | 0.6 |
| Uncertainty due to ignorance of SPR change with proton energy by current commercial treatment planning systems | 0.2 | 0.2 | 0.4 |
| Total (RSS) | 3.8 | 1.2 | 2.0 |
