10.1 - Dosimeter Principles

These notes have been based on Simran Gill's physics tutorial given in 2010.

The ideal dosimeter should:

  • Be accurate
  • Be precise
  • Show a linear response to dose
  • Have minimal variation with radiation quality
  • Have minimal variation with absolute dose
  • Have minimal variation with dose rate
  • Have minimal variation with position
  • Have a high spatial resolution

When something is ideal, it doesn't exist yet.

Accuracy and Precision

Accuracy refers to how close the reading of a device is to the actual value. If the accuracy is poor then a systematic error may result.
Precision refers to how close repeated readings of the device agree with each other. If the precision is poor then larger random errors may result.