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Accuracy and Precision
or „true“ value
Systematic error
is a set of results of measurements that deviate by a consistent
amount from the true value of the measurement. Once a systematic error is known, a
correction can be applied to compensate for it.
Random error
occurs when the same measurement is performed repeatedly and the
resulting variations lead to the measurable values being inconsistent.
Accuracy and Uncertainty Considerations in Modern Radiation Oncology,
The Modern Technology of Radiation Oncology, J. Van Dyk, 2013