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Sources of uncertainty in Gafchromic film dosimetry and their associated magnitudes.
| Uncertainty source | Magnitude (%) |
|---|---|
| Calibration uncertainty (95% CIa) (Ref. 16) | ±6.4 |
| Polarization effects (Ref. 25) | ±3 |
| Energy dependence (Ref. 16) | ±5 |
| Free-in-air calibration used in backscatter conditions (Ref. 16) | −8 |
| Scanner nonuniformity (Ref. 16) | ±5 |
| Limits on measured peak skin dose in this studyb | [−12.8, 10.0] |
CI = Confidence interval.
Quadratic sum of individual uncertainty sources.
