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Accuracy and Precision
or „true“ value
Precision
is the closeness of agreement of the results when the same measurement is
made repeatedly.
Error
is the difference between the measured quantity and its reference value.
Note that error in this context is not to be confused with a production error or mistake.
In the radiation oncology context, however, the word “error” tends to be used for both
measurement errors and mistakes.
Accuracy and Uncertainty Considerations in Modern Radiation Oncology,
The Modern Technology of Radiation Oncology, J. Van Dyk, 2013